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/*
* Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.helper;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.os.Messenger;
import android.provider.DocumentsContract;
import android.provider.OpenableColumns;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.widget.Toast;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.compatibility.DialogFragmentWorkaround;
import org.sufficientlysecure.keychain.ui.dialog.FileDialogFragment;
import java.io.File;
import java.text.DecimalFormat;
public class FileHelper {
/**
* Checks if external storage is mounted if file is located on external storage
*
* @param file
* @return true if storage is mounted
*/
public static boolean isStorageMounted(String file) {
if (file.startsWith(Environment.getExternalStorageDirectory().getAbsolutePath())) {
if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
return false;
}
}
return true;
}
/**
* Opens the preferred installed file manager on Android and shows a toast if no manager is
* installed.
*
* @param fragment
* @param last default selected Uri, not supported by all file managers
* @param mimeType can be text/plain for example
* @param requestCode requestCode used to identify the result coming back from file manager to
* onActivityResult() in your activity
*/
public static void openFile(Fragment fragment, Uri last, String mimeType, int requestCode) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setData(last);
intent.setType(mimeType);
try {
fragment.startActivityForResult(intent, requestCode);
} catch (ActivityNotFoundException e) {
// No compatible file manager was found.
Toast.makeText(fragment.getActivity(), R.string.no_filemanager_installed,
Toast.LENGTH_SHORT).show();
}
}
public static void saveFile(final FileDialogCallback callback, final FragmentManager fragmentManager,
final String title, final String message, final File defaultFile,
final String checkMsg) {
// Message is received after file is selected
Handler returnHandler = new Handler() {
@Override
public void handleMessage(Message message) {
if (message.what == FileDialogFragment.MESSAGE_OKAY) {
callback.onFileSelected(
new File(message.getData().getString(FileDialogFragment.MESSAGE_DATA_FILE)),
message.getData().getBoolean(FileDialogFragment.MESSAGE_DATA_CHECKED));
}
}
};
// Create a new Messenger for the communication back
final Messenger messenger = new Messenger(returnHandler);
DialogFragmentWorkaround.INTERFACE.runnableRunDelayed(new Runnable() {
@Override
public void run() {
FileDialogFragment fileDialog = FileDialogFragment.newInstance(messenger, title, message,
defaultFile, checkMsg);
fileDialog.show(fragmentManager, "fileDialog");
}
});
}
public static void saveFile(Fragment fragment, String title, String message, File defaultFile, int requestCode) {
saveFile(fragment, title, message, defaultFile, requestCode, null);
}
public static void saveFile(final Fragment fragment, String title, String message, File defaultFile,
final int requestCode, String checkMsg) {
saveFile(new FileDialogCallback() {
@Override
public void onFileSelected(File file, boolean checked) {
Intent intent = new Intent();
intent.setData(Uri.fromFile(file));
fragment.onActivityResult(requestCode, Activity.RESULT_OK, intent);
}
}, fragment.getActivity().getSupportFragmentManager(), title, message, defaultFile, checkMsg);
}
@TargetApi(Build.VERSION_CODES.KITKAT)
public static void openDocument(Fragment fragment, String mimeType, int requestCode) {
openDocument(fragment, mimeType, false, requestCode);
}
/**
* Opens the storage browser on Android 4.4 or later for opening a file
*
* @param fragment
* @param mimeType can be text/plain for example
* @param multiple allow file chooser to return multiple files
* @param requestCode used to identify the result coming back from storage browser onActivityResult() in your
*/
@TargetApi(Build.VERSION_CODES.KITKAT)
public static void openDocument(Fragment fragment, String mimeType, boolean multiple, int requestCode) {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType(mimeType);
intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, multiple);
fragment.startActivityForResult(intent, requestCode);
}
/**
* Opens the storage browser on Android 4.4 or later for saving a file
*
* @param fragment
* @param mimeType can be text/plain for example
* @param suggestedName a filename desirable for the file to be saved
* @param requestCode used to identify the result coming back from storage browser onActivityResult() in your
*/
@TargetApi(Build.VERSION_CODES.KITKAT)
public static void saveDocument(Fragment fragment, String mimeType, String suggestedName, int requestCode) {
Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType(mimeType);
intent.putExtra("android.content.extra.SHOW_ADVANCED", true); // Note: This is not documented, but works
intent.putExtra(Intent.EXTRA_TITLE, suggestedName);
fragment.startActivityForResult(intent, requestCode);
}
public static String getFilename(Context context, Uri uri) {
String filename = null;
try {
Cursor cursor = context.getContentResolver().query(uri, new String[]{OpenableColumns.DISPLAY_NAME}, null, null, null);
if (cursor != null) {
if (cursor.moveToNext()) {
filename = cursor.getString(0);
}
cursor.close();
}
} catch (Exception ignored) {
// This happens in rare cases (eg: document deleted since selection) and should not cause a failure
}
if (filename == null) {
String[] split = uri.toString().split("/");
filename = split[split.length - 1];
}
return filename;
}
public static long getFileSize(Context context, Uri uri) {
return getFileSize(context, uri, -1);
}
public static long getFileSize(Context context, Uri uri, long def) {
long size = def;
try {
Cursor cursor = context.getContentResolver().query(uri, new String[]{OpenableColumns.SIZE}, null, null, null);
if (cursor != null) {
if (cursor.moveToNext()) {
size = cursor.getLong(0);
}
cursor.close();
}
} catch (Exception ignored) {
// This happens in rare cases (eg: document deleted since selection) and should not cause a failure
}
return size;
}
/**
* Retrieve thumbnail of file, document api feature and thus KitKat only
*/
public static Bitmap getThumbnail(Context context, Uri uri, Point size) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
return DocumentsContract.getDocumentThumbnail(context.getContentResolver(), uri, size, null);
} else {
return null;
}
}
public static String readableFileSize(long size) {
if (size <= 0) return "0";
final String[] units = new String[]{"B", "KB", "MB", "GB", "TB"};
int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + " " + units[digitGroups];
}
public static interface FileDialogCallback {
public void onFileSelected(File file, boolean checked);
}
}
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