New gradle folder structure for API Demo

17 files changed, 1595 insertions, 0 deletions

diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/IOpenPgpCallback.aidl b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/IOpenPgpCallback.aidl
new file mode 100644
index 000000000..ba41de1ba
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/IOpenPgpCallback.aidl
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import org.openintents.openpgp.OpenPgpData;
+import org.openintents.openpgp.OpenPgpSignatureResult;
+import org.openintents.openpgp.OpenPgpError;
+
+interface IOpenPgpCallback {
+    
+    /**
+     * onSuccess returns on successful OpenPGP operations.
+     * 
+     * @param output
+     *            contains resulting output (decrypted content (when input was encrypted)
+     *            or content without signature (when input was signed-only))
+     * @param signatureResult
+     *            signatureResult is only non-null if decryptAndVerify() was called and the content
+     *            was encrypted or signed-and-encrypted.
+     */
+    oneway void onSuccess(in OpenPgpData output, in OpenPgpSignatureResult signatureResult);
+
+    /**
+     * onError returns on errors or when allowUserInteraction was set to false, but user interaction
+     * was required execute an OpenPGP operation.
+     * 
+     * @param error
+     *            See OpenPgpError class for more information.
+     */
+    oneway void onError(in OpenPgpError error);
+}
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/IOpenPgpKeyIdsCallback.aidl b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/IOpenPgpKeyIdsCallback.aidl
new file mode 100644
index 000000000..4ca356fad
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/IOpenPgpKeyIdsCallback.aidl
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import org.openintents.openpgp.OpenPgpError;
+
+interface IOpenPgpKeyIdsCallback {
+    
+    /**
+     * onSuccess returns on successful getKeyIds operations.
+     * 
+     * @param keyIds
+     *            returned key ids
+     */
+    oneway void onSuccess(in long[] keyIds);
+
+    /**
+     * onError returns on errors or when allowUserInteraction was set to false, but user interaction
+     * was required execute an OpenPGP operation.
+     * 
+     * @param error
+     *            See OpenPgpError class for more information.
+     */
+    oneway void onError(in OpenPgpError error);
+}
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/IOpenPgpService.aidl b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/IOpenPgpService.aidl
new file mode 100644
index 000000000..8f9e8a0fd
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/IOpenPgpService.aidl
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+package org.openintents.openpgp;
+
+import org.openintents.openpgp.OpenPgpData;
+import org.openintents.openpgp.IOpenPgpCallback;
+import org.openintents.openpgp.IOpenPgpKeyIdsCallback;
+
+/**
+ * All methods are oneway, which means they are asynchronous and non-blocking.
+ * Results are returned to the callback, which has to be implemented on client side.
+ */
+interface IOpenPgpService {
+
+    /**
+     * Sign
+     * 
+     * After successful signing, callback's onSuccess will contain the resulting output.
+     *
+     * @param input
+     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
+     * @param output
+     *            Request output format by defining OpenPgpData object
+     *            
+     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
+     *                Returns as String
+     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
+     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
+     *                Returns as byte[]
+     *            new OpenPgpData(uri)
+     *                Writes output to given Uri
+     *            new OpenPgpData(fileDescriptor)
+     *                Writes output to given ParcelFileDescriptor
+     * @param callback
+     *            Callback where to return results
+     */
+    oneway void sign(in OpenPgpData input, in OpenPgpData output, in IOpenPgpCallback callback);
+    
+    /**
+     * Encrypt
+     * 
+     * After successful encryption, callback's onSuccess will contain the resulting output.
+     * 
+     * @param input
+     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
+     * @param output
+     *            Request output format by defining OpenPgpData object
+     *            
+     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
+     *                Returns as String
+     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
+     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
+     *                Returns as byte[]
+     *            new OpenPgpData(uri)
+     *                Writes output to given Uri
+     *            new OpenPgpData(fileDescriptor)
+     *                Writes output to given ParcelFileDescriptor
+     * @param keyIds
+     *            Key Ids of recipients. Can be retrieved with getKeyIds()
+     * @param callback
+     *            Callback where to return results
+     */
+    oneway void encrypt(in OpenPgpData input, in OpenPgpData output, in long[] keyIds, in IOpenPgpCallback callback);
+    
+    /**
+     * Sign then encrypt
+     * 
+     * After successful signing and encryption, callback's onSuccess will contain the resulting output.
+     *
+     * @param input
+     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
+     * @param output
+     *            Request output format by defining OpenPgpData object
+     *            
+     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
+     *                Returns as String
+     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
+     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
+     *                Returns as byte[]
+     *            new OpenPgpData(uri)
+     *                Writes output to given Uri
+     *            new OpenPgpData(fileDescriptor)
+     *                Writes output to given ParcelFileDescriptor
+     * @param keyIds
+     *            Key Ids of recipients. Can be retrieved with getKeyIds()
+     * @param callback
+     *            Callback where to return results
+     */
+    oneway void signAndEncrypt(in OpenPgpData input, in OpenPgpData output, in long[] keyIds, in IOpenPgpCallback callback);
+    
+    /**
+     * Decrypts and verifies given input bytes. This methods handles encrypted-only, signed-and-encrypted,
+     * and also signed-only input.
+     * 
+     * After successful decryption/verification, callback's onSuccess will contain the resulting output.
+     * The signatureResult in onSuccess is only non-null if signed-and-encrypted or signed-only inputBytes were given.
+     * 
+     * @param input
+     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
+     * @param output
+     *            Request output format by defining OpenPgpData object
+     *            
+     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
+     *                Returns as String
+     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
+     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
+     *                Returns as byte[]
+     *            new OpenPgpData(uri)
+     *                Writes output to given Uri
+     *            new OpenPgpData(fileDescriptor)
+     *                Writes output to given ParcelFileDescriptor
+     * @param callback
+     *            Callback where to return results
+     */
+    oneway void decryptAndVerify(in OpenPgpData input, in OpenPgpData output, in IOpenPgpCallback callback);
+    
+    /**
+     * Get available key ids based on given user ids
+     *
+     * @param ids
+     *            User Ids (emails) of recipients OR key ids
+     * @param allowUserInteraction
+     *            Enable user interaction to lookup and import unknown keys
+     * @param callback
+     *            Callback where to return results (different type than callback in other functions!)
+     */
+    oneway void getKeyIds(in String[] ids, in boolean allowUserInteraction, in IOpenPgpKeyIdsCallback callback);
+    
+}
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpConstants.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpConstants.java
new file mode 100644
index 000000000..b1ca1bfe6
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpConstants.java
@@ -0,0 +1,10 @@
+package org.openintents.openpgp;
+
+public class OpenPgpConstants {
+
+    public static final String TAG = "OpenPgp API";
+
+    public static final int REQUIRED_API_VERSION = 1;
+    public static final String SERVICE_INTENT = "org.openintents.openpgp.IOpenPgpService";
+
+}
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpData.aidl b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpData.aidl
new file mode 100644
index 000000000..3711e4fb4
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpData.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+package org.openintents.openpgp;
+
+// Declare OpenPgpData so AIDL can find it and knows that it implements the parcelable protocol.
+parcelable OpenPgpData;
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpData.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpData.java
new file mode 100644
index 000000000..6615c2146
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpData.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import android.net.Uri;
+import android.os.Parcel;
+import android.os.ParcelFileDescriptor;
+import android.os.Parcelable;
+
+public class OpenPgpData implements Parcelable {
+    public static final int TYPE_STRING = 0;
+    public static final int TYPE_BYTE_ARRAY = 1;
+    public static final int TYPE_FILE_DESCRIPTOR = 2;
+    public static final int TYPE_URI = 3;
+
+    int type;
+
+    String string;
+    byte[] bytes = new byte[0];
+    ParcelFileDescriptor fileDescriptor;
+    Uri uri;
+
+    public int getType() {
+        return type;
+    }
+
+    public String getString() {
+        return string;
+    }
+
+    public byte[] getBytes() {
+        return bytes;
+    }
+
+    public ParcelFileDescriptor getFileDescriptor() {
+        return fileDescriptor;
+    }
+
+    public Uri getUri() {
+        return uri;
+    }
+
+    public OpenPgpData() {
+
+    }
+
+    /**
+     * Not a real constructor. This can be used to define requested output type.
+     * 
+     * @param type
+     */
+    public OpenPgpData(int type) {
+        this.type = type;
+    }
+
+    public OpenPgpData(String string) {
+        this.string = string;
+        this.type = TYPE_STRING;
+    }
+
+    public OpenPgpData(byte[] bytes) {
+        this.bytes = bytes;
+        this.type = TYPE_BYTE_ARRAY;
+    }
+
+    public OpenPgpData(ParcelFileDescriptor fileDescriptor) {
+        this.fileDescriptor = fileDescriptor;
+        this.type = TYPE_FILE_DESCRIPTOR;
+    }
+
+    public OpenPgpData(Uri uri) {
+        this.uri = uri;
+        this.type = TYPE_URI;
+    }
+
+    public OpenPgpData(OpenPgpData b) {
+        this.string = b.string;
+        this.bytes = b.bytes;
+        this.fileDescriptor = b.fileDescriptor;
+        this.uri = b.uri;
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(type);
+        dest.writeString(string);
+        dest.writeInt(bytes.length);
+        dest.writeByteArray(bytes);
+        dest.writeParcelable(fileDescriptor, 0);
+        dest.writeParcelable(uri, 0);
+    }
+
+    public static final Creator<OpenPgpData> CREATOR = new Creator<OpenPgpData>() {
+        public OpenPgpData createFromParcel(final Parcel source) {
+            OpenPgpData vr = new OpenPgpData();
+            vr.type = source.readInt();
+            vr.string = source.readString();
+            vr.bytes = new byte[source.readInt()];
+            source.readByteArray(vr.bytes);
+            vr.fileDescriptor = source.readParcelable(ParcelFileDescriptor.class.getClassLoader());
+            vr.fileDescriptor = source.readParcelable(Uri.class.getClassLoader());
+            return vr;
+        }
+
+        public OpenPgpData[] newArray(final int size) {
+            return new OpenPgpData[size];
+        }
+    };
+
+}
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpError.aidl b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpError.aidl
new file mode 100644
index 000000000..7a6bed1e6
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpError.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+package org.openintents.openpgp;
+
+// Declare OpenPgpError so AIDL can find it and knows that it implements the parcelable protocol.
+parcelable OpenPgpError;
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpError.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpError.java
new file mode 100644
index 000000000..f108d3169
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpError.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+public class OpenPgpError implements Parcelable {
+    public static final int GENERIC_ERROR = 0;
+    public static final int NO_OR_WRONG_PASSPHRASE = 1;
+    public static final int NO_USER_IDS = 2;
+    public static final int USER_INTERACTION_REQUIRED = 3;
+
+    int errorId;
+    String message;
+
+    public OpenPgpError() {
+    }
+
+    public OpenPgpError(int errorId, String message) {
+        this.errorId = errorId;
+        this.message = message;
+    }
+
+    public OpenPgpError(OpenPgpError b) {
+        this.errorId = b.errorId;
+        this.message = b.message;
+    }
+
+    public int getErrorId() {
+        return errorId;
+    }
+
+    public void setErrorId(int errorId) {
+        this.errorId = errorId;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(errorId);
+        dest.writeString(message);
+    }
+
+    public static final Creator<OpenPgpError> CREATOR = new Creator<OpenPgpError>() {
+        public OpenPgpError createFromParcel(final Parcel source) {
+            OpenPgpError error = new OpenPgpError();
+            error.errorId = source.readInt();
+            error.message = source.readString();
+            return error;
+        }
+
+        public OpenPgpError[] newArray(final int size) {
+            return new OpenPgpError[size];
+        }
+    };
+}
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpHelper.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpHelper.java
new file mode 100644
index 000000000..7305c47ce
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpHelper.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import java.util.List;
+import java.util.regex.Pattern;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+
+public class OpenPgpHelper {
+    private Context context;
+
+    public static Pattern PGP_MESSAGE = Pattern.compile(
+            ".*?(-----BEGIN PGP MESSAGE-----.*?-----END PGP MESSAGE-----).*", Pattern.DOTALL);
+
+    public static Pattern PGP_SIGNED_MESSAGE = Pattern
+            .compile(
+                    ".*?(-----BEGIN PGP SIGNED MESSAGE-----.*?-----BEGIN PGP SIGNATURE-----.*?-----END PGP SIGNATURE-----).*",
+                    Pattern.DOTALL);
+
+    public OpenPgpHelper(Context context) {
+        super();
+        this.context = context;
+    }
+
+    public boolean isAvailable() {
+        Intent intent = new Intent(OpenPgpConstants.SERVICE_INTENT);
+        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(intent, 0);
+        if (!resInfo.isEmpty()) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+}
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpListPreference.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpListPreference.java
new file mode 100644
index 000000000..c8e709df9
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpListPreference.java
@@ -0,0 +1,203 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import android.app.AlertDialog.Builder;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.pm.ServiceInfo;
+import android.graphics.Bitmap;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.preference.DialogPreference;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ListAdapter;
+import android.widget.TextView;
+
+public class OpenPgpListPreference extends DialogPreference {
+    ArrayList<OpenPgpProviderEntry> mProviderList = new ArrayList<OpenPgpProviderEntry>();
+    private String mSelectedPackage;
+
+    public OpenPgpListPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(
+                new Intent(OpenPgpConstants.SERVICE_INTENT), PackageManager.GET_META_DATA);
+        if (!resInfo.isEmpty()) {
+            for (ResolveInfo resolveInfo : resInfo) {
+                if (resolveInfo.serviceInfo == null)
+                    continue;
+
+                String packageName = resolveInfo.serviceInfo.packageName;
+                String simpleName = String.valueOf(resolveInfo.serviceInfo.loadLabel(context
+                        .getPackageManager()));
+                Drawable icon = resolveInfo.serviceInfo.loadIcon(context.getPackageManager());
+
+                // get api version
+                ServiceInfo si = resolveInfo.serviceInfo;
+                int apiVersion = si.metaData.getInt("api_version");
+
+                mProviderList.add(new OpenPgpProviderEntry(packageName, simpleName, icon,
+                        apiVersion));
+            }
+        }
+    }
+
+    public OpenPgpListPreference(Context context) {
+        this(context, null);
+    }
+
+    /**
+     * Can be used to add "no selection"
+     * 
+     * @param packageName
+     * @param simpleName
+     * @param icon
+     */
+    public void addProvider(int position, String packageName, String simpleName, Drawable icon,
+            int apiVersion) {
+        mProviderList.add(position, new OpenPgpProviderEntry(packageName, simpleName, icon,
+                apiVersion));
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(Builder builder) {
+        // Init ArrayAdapter with OpenPGP Providers
+        ListAdapter adapter = new ArrayAdapter<OpenPgpProviderEntry>(getContext(),
+                android.R.layout.select_dialog_singlechoice, android.R.id.text1, mProviderList) {
+            public View getView(int position, View convertView, ViewGroup parent) {
+                // User super class to create the View
+                View v = super.getView(position, convertView, parent);
+                TextView tv = (TextView) v.findViewById(android.R.id.text1);
+
+                // Put the image on the TextView
+                tv.setCompoundDrawablesWithIntrinsicBounds(mProviderList.get(position).icon, null,
+                        null, null);
+
+                // Add margin between image and text (support various screen densities)
+                int dp10 = (int) (10 * getContext().getResources().getDisplayMetrics().density + 0.5f);
+                tv.setCompoundDrawablePadding(dp10);
+
+                // disable if it has the wrong api_version
+                if (mProviderList.get(position).apiVersion == OpenPgpConstants.REQUIRED_API_VERSION) {
+                    tv.setEnabled(true);
+                } else {
+                    tv.setEnabled(false);
+                    tv.setText(tv.getText() + " (API v" + mProviderList.get(position).apiVersion
+                            + ", needs v" + OpenPgpConstants.REQUIRED_API_VERSION + ")");
+                }
+
+                return v;
+            }
+        };
+
+        builder.setSingleChoiceItems(adapter, getIndexOfProviderList(getValue()),
+                new DialogInterface.OnClickListener() {
+
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        mSelectedPackage = mProviderList.get(which).packageName;
+
+                        /*
+                         * Clicking on an item simulates the positive button click, and dismisses
+                         * the dialog.
+                         */
+                        OpenPgpListPreference.this.onClick(dialog, DialogInterface.BUTTON_POSITIVE);
+                        dialog.dismiss();
+                    }
+                });
+
+        /*
+         * The typical interaction for list-based dialogs is to have click-on-an-item dismiss the
+         * dialog instead of the user having to press 'Ok'.
+         */
+        builder.setPositiveButton(null, null);
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+
+        if (positiveResult && (mSelectedPackage != null)) {
+            if (callChangeListener(mSelectedPackage)) {
+                setValue(mSelectedPackage);
+            }
+        }
+    }
+
+    private int getIndexOfProviderList(String packageName) {
+        for (OpenPgpProviderEntry app : mProviderList) {
+            if (app.packageName.equals(packageName)) {
+                return mProviderList.indexOf(app);
+            }
+        }
+
+        return -1;
+    }
+
+    public void setValue(String packageName) {
+        mSelectedPackage = packageName;
+        persistString(packageName);
+    }
+
+    public String getValue() {
+        return mSelectedPackage;
+    }
+
+    public String getEntry() {
+        return getEntryByValue(mSelectedPackage);
+    }
+
+    public String getEntryByValue(String packageName) {
+        for (OpenPgpProviderEntry app : mProviderList) {
+            if (app.packageName.equals(packageName)) {
+                return app.simpleName;
+            }
+        }
+
+        return null;
+    }
+
+    private static class OpenPgpProviderEntry {
+        private String packageName;
+        private String simpleName;
+        private Drawable icon;
+        private int apiVersion;
+
+        public OpenPgpProviderEntry(String packageName, String simpleName, Drawable icon,
+                int apiVersion) {
+            this.packageName = packageName;
+            this.simpleName = simpleName;
+            this.icon = icon;
+            this.apiVersion = apiVersion;
+        }
+
+        @Override
+        public String toString() {
+            return simpleName;
+        }
+    }
+}
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpServiceConnection.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpServiceConnection.java
new file mode 100644
index 000000000..f7ba06aaf
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpServiceConnection.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import org.openintents.openpgp.IOpenPgpService;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.IBinder;
+import android.util.Log;
+
+public class OpenPgpServiceConnection {
+    private Context mApplicationContext;
+
+    private IOpenPgpService mService;
+    private boolean mBound;
+    private String mCryptoProviderPackageName;
+
+    public OpenPgpServiceConnection(Context context, String cryptoProviderPackageName) {
+        this.mApplicationContext = context.getApplicationContext();
+        this.mCryptoProviderPackageName = cryptoProviderPackageName;
+    }
+
+    public IOpenPgpService getService() {
+        return mService;
+    }
+
+    public boolean isBound() {
+        return mBound;
+    }
+
+    private ServiceConnection mCryptoServiceConnection = new ServiceConnection() {
+        public void onServiceConnected(ComponentName name, IBinder service) {
+            mService = IOpenPgpService.Stub.asInterface(service);
+            Log.d(OpenPgpConstants.TAG, "connected to service");
+            mBound = true;
+        }
+
+        public void onServiceDisconnected(ComponentName name) {
+            mService = null;
+            Log.d(OpenPgpConstants.TAG, "disconnected from service");
+            mBound = false;
+        }
+    };
+
+    /**
+     * If not already bound, bind!
+     * 
+     * @return
+     */
+    public boolean bindToService() {
+        if (mService == null && !mBound) { // if not already connected
+            try {
+                Log.d(OpenPgpConstants.TAG, "not bound yet");
+
+                Intent serviceIntent = new Intent();
+                serviceIntent.setAction(IOpenPgpService.class.getName());
+                serviceIntent.setPackage(mCryptoProviderPackageName);
+                mApplicationContext.bindService(serviceIntent, mCryptoServiceConnection,
+                        Context.BIND_AUTO_CREATE);
+
+                return true;
+            } catch (Exception e) {
+                Log.d(OpenPgpConstants.TAG, "Exception on binding", e);
+                return false;
+            }
+        } else {
+            Log.d(OpenPgpConstants.TAG, "already bound");
+            return true;
+        }
+    }
+
+    public void unbindFromService() {
+        mApplicationContext.unbindService(mCryptoServiceConnection);
+    }
+
+}
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.aidl b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.aidl
new file mode 100644
index 000000000..e246792d0
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+package org.openintents.openpgp;
+
+// Declare OpenPgpSignatureResult so AIDL can find it and knows that it implements the parcelable protocol.
+parcelable OpenPgpSignatureResult;
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.java
new file mode 100644
index 000000000..829f8f8cf
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+public class OpenPgpSignatureResult implements Parcelable {
+    // generic error on signature verification
+    public static final int SIGNATURE_ERROR = 0;
+    // successfully verified signature, with trusted public key
+    public static final int SIGNATURE_SUCCESS_TRUSTED = 1;
+    // no public key was found for this signature verification
+    // you can retrieve the key with
+    // getKeys(new String[] {String.valueOf(signatureResult.getKeyId)}, true, callback)
+    public static final int SIGNATURE_UNKNOWN_PUB_KEY = 2;
+    // successfully verified signature, but with untrusted public key
+    public static final int SIGNATURE_SUCCESS_UNTRUSTED = 3;
+
+    int status;
+    boolean signatureOnly;
+    String userId;
+    long keyId;
+
+    public int getStatus() {
+        return status;
+    }
+
+    public boolean isSignatureOnly() {
+        return signatureOnly;
+    }
+
+    public String getUserId() {
+        return userId;
+    }
+
+    public long getKeyId() {
+        return keyId;
+    }
+
+    public OpenPgpSignatureResult() {
+
+    }
+
+    public OpenPgpSignatureResult(int signatureStatus, String signatureUserId,
+            boolean signatureOnly, long keyId) {
+        this.status = signatureStatus;
+        this.signatureOnly = signatureOnly;
+        this.userId = signatureUserId;
+        this.keyId = keyId;
+    }
+
+    public OpenPgpSignatureResult(OpenPgpSignatureResult b) {
+        this.status = b.status;
+        this.userId = b.userId;
+        this.signatureOnly = b.signatureOnly;
+        this.keyId = b.keyId;
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(status);
+        dest.writeByte((byte) (signatureOnly ? 1 : 0));
+        dest.writeString(userId);
+        dest.writeLong(keyId);
+    }
+
+    public static final Creator<OpenPgpSignatureResult> CREATOR = new Creator<OpenPgpSignatureResult>() {
+        public OpenPgpSignatureResult createFromParcel(final Parcel source) {
+            OpenPgpSignatureResult vr = new OpenPgpSignatureResult();
+            vr.status = source.readInt();
+            vr.signatureOnly = source.readByte() == 1;
+            vr.userId = source.readString();
+            vr.keyId = source.readLong();
+            return vr;
+        }
+
+        public OpenPgpSignatureResult[] newArray(final int size) {
+            return new OpenPgpSignatureResult[size];
+        }
+    };
+
+    @Override
+    public String toString() {
+        String out = new String();
+        out += "\nstatus: " + status;
+        out += "\nuserId: " + userId;
+        out += "\nsignatureOnly: " + signatureOnly;
+        out += "\nkeyId: " + keyId;
+        return out;
+    }
+
+}
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/AidlDemoActivity2.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/AidlDemoActivity2.java
new file mode 100644
index 000000000..b6e211955
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/AidlDemoActivity2.java
@@ -0,0 +1,168 @@
+///*
+// * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+// *
+// * Licensed under the Apache License, Version 2.0 (the "License");
+// * you may not use this file except in compliance with the License.
+// * You may obtain a copy of the License at
+// *
+// *      http://www.apache.org/licenses/LICENSE-2.0
+// *
+// * Unless required by applicable law or agreed to in writing, software
+// * distributed under the License is distributed on an "AS IS" BASIS,
+// * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// * See the License for the specific language governing permissions and
+// * limitations under the License.
+// */
+//
+//package org.sufficientlysecure.keychain.demo;
+//
+//import java.util.ArrayList;
+//import java.util.List;
+//
+//import org.sufficientlysecure.keychain.demo.R;
+//import org.sufficientlysecure.keychain.integration.KeychainData;
+//import org.sufficientlysecure.keychain.integration.KeychainIntentHelper;
+//import org.sufficientlysecure.keychain.service.IKeychainKeyService;
+//import org.sufficientlysecure.keychain.service.handler.IKeychainGetKeyringsHandler;
+//
+//import android.annotation.SuppressLint;
+//import android.app.Activity;
+//import android.app.AlertDialog;
+//import android.content.ComponentName;
+//import android.content.Context;
+//import android.content.Intent;
+//import android.content.ServiceConnection;
+//import android.os.Bundle;
+//import android.os.IBinder;
+//import android.os.RemoteException;
+//import android.util.Base64;
+//import android.view.View;
+//import android.widget.TextView;
+//
+//public class AidlDemoActivity2 extends Activity {
+//    Activity mActivity;
+//
+//    TextView mKeyringsTextView;
+//
+//    KeychainIntentHelper mKeychainIntentHelper;
+//    KeychainData mKeychainData;
+//
+//    byte[] keysBytes;
+//    ArrayList<String> keysStrings;
+//
+//    private IKeychainKeyService service = null;
+//    private ServiceConnection svcConn = new ServiceConnection() {
+//        public void onServiceConnected(ComponentName className, IBinder binder) {
+//            service = IKeychainKeyService.Stub.asInterface(binder);
+//        }
+//
+//        public void onServiceDisconnected(ComponentName className) {
+//            service = null;
+//        }
+//    };
+//
+//    @Override
+//    public void onCreate(Bundle icicle) {
+//        super.onCreate(icicle);
+//        setContentView(R.layout.aidl_demo2);
+//
+//        mActivity = this;
+//
+//        mKeyringsTextView = (TextView) findViewById(R.id.aidl_demo_keyrings);
+//
+//        mKeychainIntentHelper = new KeychainIntentHelper(mActivity);
+//        mKeychainData = new KeychainData();
+//
+//        bindService(new Intent(IKeychainKeyService.class.getName()), svcConn,
+//                Context.BIND_AUTO_CREATE);
+//    }
+//
+//    public void getKeyringsStringsOnClick(View view) {
+//        try {
+//            service.getPublicKeyRings(mKeychainData.getPublicKeys(), true, getKeyringsHandler);
+//        } catch (RemoteException e) {
+//            exceptionImplementation(-1, e.toString());
+//        }
+//    }
+//
+//    public void getKeyringsBytesOnClick(View view) {
+//        try {
+//            service.getPublicKeyRings(mKeychainData.getPublicKeys(), false, getKeyringsHandler);
+//        } catch (RemoteException e) {
+//            exceptionImplementation(-1, e.toString());
+//        }
+//    }
+//
+//    @SuppressLint("NewApi")
+//    private void updateView() {
+//        if (keysBytes != null) {
+//            mKeyringsTextView.setText(Base64.encodeToString(keysBytes, Base64.DEFAULT));
+//        } else if (keysStrings != null) {
+//            mKeyringsTextView.setText("");
+//            for (String output : keysStrings) {
+//                mKeyringsTextView.append(output);
+//            }
+//        }
+//    }
+//
+//    @Override
+//    public void onDestroy() {
+//        super.onDestroy();
+//
+//        unbindService(svcConn);
+//    }
+//
+//    private void exceptionImplementation(int exceptionId, String error) {
+//        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+//        builder.setTitle("Exception!").setMessage(error).setPositiveButton("OK", null).show();
+//    }
+//
+//    private final IKeychainGetKeyringsHandler.Stub getKeyringsHandler = new IKeychainGetKeyringsHandler.Stub() {
+//
+//        @Override
+//        public void onException(final int exceptionId, final String message) throws RemoteException {
+//            runOnUiThread(new Runnable() {
+//                public void run() {
+//                    exceptionImplementation(exceptionId, message);
+//                }
+//            });
+//        }
+//
+//        @Override
+//        public void onSuccess(final byte[] outputBytes, final List<String> outputStrings)
+//                throws RemoteException {
+//            runOnUiThread(new Runnable() {
+//                public void run() {
+//                    if (outputBytes != null) {
+//                        keysBytes = outputBytes;
+//                        keysStrings = null;
+//                    } else if (outputStrings != null) {
+//                        keysBytes = null;
+//                        keysStrings = (ArrayList<String>) outputStrings;
+//                    }
+//                    updateView();
+//                }
+//            });
+//
+//        }
+//
+//    };
+//
+//    public void selectEncryptionKeysOnClick(View view) {
+//        mKeychainIntentHelper.selectPublicKeys("user@example.com");
+//    }
+//
+//    @Override
+//    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+//        // this updates the mKeychainData object to the result of the methods
+//        boolean result = mKeychainIntentHelper.onActivityResult(requestCode, resultCode, data,
+//                mKeychainData);
+//        if (result) {
+//            updateView();
+//        }
+//
+//        // continue with other activity results
+//        super.onActivityResult(requestCode, resultCode, data);
+//    }
+//
+//}
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/BaseActivity.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/BaseActivity.java
new file mode 100644
index 000000000..5b286f208
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/BaseActivity.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.sufficientlysecure.keychain.demo;
+
+import org.sufficientlysecure.keychain.demo.R;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.Preference.OnPreferenceClickListener;
+import android.preference.PreferenceActivity;
+import android.widget.Toast;
+
+public class BaseActivity extends PreferenceActivity {
+    private Activity mActivity;
+
+    private Preference mIntentDemo;
+    private Preference mContentProviderDemo;
+    private Preference mCryptoProvider;
+    private Preference mAidlDemo;
+    private Preference mAidlDemo2;
+
+    /**
+     * Called when the activity is first created.
+     */
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        mActivity = this;
+
+        // load preferences from xml
+        addPreferencesFromResource(R.xml.base_preference);
+
+        // find preferences
+        mIntentDemo = (Preference) findPreference("intent_demo");
+        mContentProviderDemo = (Preference) findPreference("content_provider_demo");
+        mCryptoProvider = (Preference) findPreference("openpgp_provider_demo");
+        mAidlDemo = (Preference) findPreference("aidl_demo");
+        mAidlDemo2 = (Preference) findPreference("aidl_demo2");
+
+        mIntentDemo.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                // startActivity(new Intent(mActivity, IntentDemoActivity.class));
+                Toast.makeText(BaseActivity.this, "Not implemented!", Toast.LENGTH_LONG).show();
+
+                return false;
+            }
+        });
+
+        mCryptoProvider.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                startActivity(new Intent(mActivity, OpenPgpProviderActivity.class));
+
+                return false;
+            }
+        });
+
+        // mAidlDemo2.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+        // @Override
+        // public boolean onPreferenceClick(Preference preference) {
+        // startActivity(new Intent(mActivity, AidlDemoActivity2.class));
+        //
+        // return false;
+        // }
+        // });
+
+    }
+
+}
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/Constants.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/Constants.java
new file mode 100644
index 000000000..03e76254c
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/Constants.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.sufficientlysecure.keychain.demo;
+
+public final class Constants {
+
+    public static final boolean DEBUG = BuildConfig.DEBUG;
+
+    public static final String TAG = "Keychain";
+
+}
diff --git a/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/OpenPgpProviderActivity.java b/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/OpenPgpProviderActivity.java
new file mode 100644
index 000000000..4a96de5a1
--- /dev/null
+++ b/OpenPGP-Keychain-API-Demo/src/main/java/org/sufficientlysecure/keychain/demo/OpenPgpProviderActivity.java
@@ -0,0 +1,352 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.sufficientlysecure.keychain.demo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.openintents.openpgp.IOpenPgpKeyIdsCallback;
+import org.openintents.openpgp.OpenPgpData;
+import org.openintents.openpgp.OpenPgpError;
+import org.openintents.openpgp.OpenPgpServiceConnection;
+import org.openintents.openpgp.OpenPgpSignatureResult;
+import org.openintents.openpgp.IOpenPgpCallback;
+import org.openintents.openpgp.IOpenPgpService;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.graphics.drawable.Drawable;
+import android.os.Bundle;
+import android.os.RemoteException;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.EditText;
+import android.widget.ListAdapter;
+import android.widget.TextView;
+import android.widget.Toast;
+
+public class OpenPgpProviderActivity extends Activity {
+    Activity mActivity;
+
+    EditText mMessage;
+    EditText mCiphertext;
+    EditText mEncryptUserIds;
+
+    private OpenPgpServiceConnection mCryptoServiceConnection;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        setContentView(R.layout.crypto_provider_demo);
+
+        mActivity = this;
+
+        mMessage = (EditText) findViewById(R.id.crypto_provider_demo_message);
+        mCiphertext = (EditText) findViewById(R.id.crypto_provider_demo_ciphertext);
+        mEncryptUserIds = (EditText) findViewById(R.id.crypto_provider_demo_encrypt_user_id);
+
+        selectCryptoProvider();
+    }
+
+    /**
+     * Callback from remote openpgp service
+     */
+    final IOpenPgpKeyIdsCallback.Stub getKeysEncryptCallback = new IOpenPgpKeyIdsCallback.Stub() {
+
+        @Override
+        public void onSuccess(final long[] keyIds) throws RemoteException {
+            Log.d(Constants.TAG, "getKeysEncryptCallback keyId " + keyIds[0]);
+            mActivity.runOnUiThread(new Runnable() {
+
+                @Override
+                public void run() {
+                    // encrypt after getting key ids
+                    String inputStr = mMessage.getText().toString();
+                    OpenPgpData input = new OpenPgpData(inputStr);
+
+                    Log.d(Constants.TAG, "getKeysEncryptCallback inputStr " + inputStr);
+
+                    try {
+                        mCryptoServiceConnection.getService().encrypt(input,
+                                new OpenPgpData(OpenPgpData.TYPE_STRING), keyIds, encryptCallback);
+                    } catch (RemoteException e) {
+                        Log.e(Constants.TAG, "CryptoProviderDemo", e);
+                    }
+                }
+            });
+        }
+
+        @Override
+        public void onError(OpenPgpError error) throws RemoteException {
+            handleError(error);
+        }
+
+    };
+
+    final IOpenPgpKeyIdsCallback.Stub getKeysSignAndEncryptCallback = new IOpenPgpKeyIdsCallback.Stub() {
+
+        @Override
+        public void onSuccess(final long[] keyIds) throws RemoteException {
+            Log.d(Constants.TAG, "getKeysSignAndEncryptCallback keyId " + keyIds[0]);
+
+            mActivity.runOnUiThread(new Runnable() {
+
+                @Override
+                public void run() {
+                    // encrypt after getting key ids
+                    String inputStr = mMessage.getText().toString();
+                    OpenPgpData input = new OpenPgpData(inputStr);
+
+                    try {
+                        mCryptoServiceConnection.getService().signAndEncrypt(input,
+                                new OpenPgpData(OpenPgpData.TYPE_STRING), keyIds, encryptCallback);
+                    } catch (RemoteException e) {
+                        Log.e(Constants.TAG, "CryptoProviderDemo", e);
+                    }
+                }
+            });
+        }
+
+        @Override
+        public void onError(OpenPgpError error) throws RemoteException {
+            handleError(error);
+        }
+
+    };
+
+    final IOpenPgpCallback.Stub encryptCallback = new IOpenPgpCallback.Stub() {
+
+        @Override
+        public void onSuccess(final OpenPgpData output, OpenPgpSignatureResult signatureResult)
+                throws RemoteException {
+            Log.d(Constants.TAG, "encryptCallback");
+
+            runOnUiThread(new Runnable() {
+
+                @Override
+                public void run() {
+                    mCiphertext.setText(output.getString());
+                }
+            });
+        }
+
+        @Override
+        public void onError(OpenPgpError error) throws RemoteException {
+            handleError(error);
+        }
+
+    };
+
+    final IOpenPgpCallback.Stub decryptAndVerifyCallback = new IOpenPgpCallback.Stub() {
+
+        @Override
+        public void onSuccess(final OpenPgpData output, final OpenPgpSignatureResult signatureResult)
+                throws RemoteException {
+            Log.d(Constants.TAG, "decryptAndVerifyCallback");
+
+            runOnUiThread(new Runnable() {
+
+                @Override
+                public void run() {
+                    mMessage.setText(output.getString());
+                    if (signatureResult != null) {
+                        Toast.makeText(OpenPgpProviderActivity.this,
+                                "signature result:\n" + signatureResult.toString(),
+                                Toast.LENGTH_LONG).show();
+                    }
+                }
+            });
+
+        }
+
+        @Override
+        public void onError(OpenPgpError error) throws RemoteException {
+            handleError(error);
+        }
+
+    };
+
+    private void handleError(final OpenPgpError error) {
+        mActivity.runOnUiThread(new Runnable() {
+
+            @Override
+            public void run() {
+                Toast.makeText(mActivity,
+                        "onError id:" + error.getErrorId() + "\n\n" + error.getMessage(),
+                        Toast.LENGTH_LONG).show();
+                Log.e(Constants.TAG, "onError getErrorId:" + error.getErrorId());
+                Log.e(Constants.TAG, "onError getMessage:" + error.getMessage());
+            }
+        });
+    }
+
+    public void encryptOnClick(View view) {
+        try {
+            mCryptoServiceConnection.getService().getKeyIds(
+                    mEncryptUserIds.getText().toString().split(","), true, getKeysEncryptCallback);
+        } catch (RemoteException e) {
+            Log.e(Constants.TAG, "CryptoProviderDemo", e);
+        }
+    }
+
+    public void signOnClick(View view) {
+        String inputStr = mMessage.getText().toString();
+        OpenPgpData input = new OpenPgpData(inputStr);
+
+        try {
+            mCryptoServiceConnection.getService().sign(input,
+                    new OpenPgpData(OpenPgpData.TYPE_STRING), encryptCallback);
+        } catch (RemoteException e) {
+            Log.e(Constants.TAG, "CryptoProviderDemo", e);
+        }
+    }
+
+    public void signAndEncryptOnClick(View view) {
+        try {
+            mCryptoServiceConnection.getService().getKeyIds(
+                    mEncryptUserIds.getText().toString().split(","), true,
+                    getKeysSignAndEncryptCallback);
+        } catch (RemoteException e) {
+            Log.e(Constants.TAG, "CryptoProviderDemo", e);
+        }
+    }
+
+    public void decryptAndVerifyOnClick(View view) {
+        String inputStr = mCiphertext.getText().toString();
+        OpenPgpData input = new OpenPgpData(inputStr);
+
+        try {
+            mCryptoServiceConnection.getService().decryptAndVerify(input,
+                    new OpenPgpData(OpenPgpData.TYPE_STRING), decryptAndVerifyCallback);
+        } catch (RemoteException e) {
+            Log.e(Constants.TAG, "CryptoProviderDemo", e);
+        }
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+
+        if (mCryptoServiceConnection != null) {
+            mCryptoServiceConnection.unbindFromService();
+        }
+    }
+
+    private static class OpenPgpProviderElement {
+        private String packageName;
+        private String simpleName;
+        private Drawable icon;
+
+        public OpenPgpProviderElement(String packageName, String simpleName, Drawable icon) {
+            this.packageName = packageName;
+            this.simpleName = simpleName;
+            this.icon = icon;
+        }
+
+        @Override
+        public String toString() {
+            return simpleName;
+        }
+    }
+
+    private void selectCryptoProvider() {
+        Intent intent = new Intent(IOpenPgpService.class.getName());
+
+        final ArrayList<OpenPgpProviderElement> providerList = new ArrayList<OpenPgpProviderElement>();
+
+        List<ResolveInfo> resInfo = getPackageManager().queryIntentServices(intent, 0);
+        if (!resInfo.isEmpty()) {
+            for (ResolveInfo resolveInfo : resInfo) {
+                if (resolveInfo.serviceInfo == null)
+                    continue;
+
+                String packageName = resolveInfo.serviceInfo.packageName;
+                String simpleName = String.valueOf(resolveInfo.serviceInfo
+                        .loadLabel(getPackageManager()));
+                Drawable icon = resolveInfo.serviceInfo.loadIcon(getPackageManager());
+                providerList.add(new OpenPgpProviderElement(packageName, simpleName, icon));
+            }
+        }
+
+        AlertDialog.Builder alert = new AlertDialog.Builder(this);
+        alert.setTitle("Select OpenPGP Provider!");
+        alert.setCancelable(false);
+
+        if (!providerList.isEmpty()) {
+            // add "disable OpenPGP provider"
+            providerList.add(0, new OpenPgpProviderElement(null, "Disable OpenPGP Provider",
+                    getResources().getDrawable(android.R.drawable.ic_menu_close_clear_cancel)));
+
+            // Init ArrayAdapter with OpenPGP Providers
+            ListAdapter adapter = new ArrayAdapter<OpenPgpProviderElement>(this,
+                    android.R.layout.select_dialog_item, android.R.id.text1, providerList) {
+                public View getView(int position, View convertView, ViewGroup parent) {
+                    // User super class to create the View
+                    View v = super.getView(position, convertView, parent);
+                    TextView tv = (TextView) v.findViewById(android.R.id.text1);
+
+                    // Put the image on the TextView
+                    tv.setCompoundDrawablesWithIntrinsicBounds(providerList.get(position).icon,
+                            null, null, null);
+
+                    // Add margin between image and text (support various screen densities)
+                    int dp5 = (int) (5 * getResources().getDisplayMetrics().density + 0.5f);
+                    tv.setCompoundDrawablePadding(dp5);
+
+                    return v;
+                }
+            };
+
+            alert.setSingleChoiceItems(adapter, -1, new DialogInterface.OnClickListener() {
+
+                public void onClick(DialogInterface dialog, int position) {
+                    String packageName = providerList.get(position).packageName;
+
+                    if (packageName == null) {
+                        dialog.cancel();
+                        finish();
+                    }
+
+                    // bind to service
+                    mCryptoServiceConnection = new OpenPgpServiceConnection(
+                            OpenPgpProviderActivity.this, packageName);
+                    mCryptoServiceConnection.bindToService();
+
+                    dialog.dismiss();
+                }
+            });
+        } else {
+            alert.setMessage("No OpenPGP Provider installed!");
+        }
+
+        alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+
+            public void onClick(DialogInterface dialog, int id) {
+                dialog.cancel();
+                finish();
+            }
+        });
+
+        AlertDialog ad = alert.create();
+        ad.show();
+    }
+}