OTG: Implement hidden activity usb detection technique

1 files changed, 42 insertions, 0 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/UsbEventReceiverActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/UsbEventReceiverActivity.java
new file mode 100644
index 000000000..9df5800b5
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/UsbEventReceiverActivity.java
@@ -0,0 +1,42 @@
+package org.sufficientlysecure.keychain.ui;
+
+import android.app.Activity;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.hardware.usb.UsbDevice;
+import android.hardware.usb.UsbManager;
+import android.os.Bundle;
+
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.util.Log;
+
+public class UsbEventReceiverActivity extends Activity {
+    public static final String ACTION_USB_PERMISSION =
+            "org.sufficientlysecure.keychain.ui.USB_PERMISSION";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        final UsbManager usbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
+
+        Intent intent = getIntent();
+        if (intent != null) {
+            if (UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(intent.getAction())) {
+                UsbDevice usbDevice = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
+
+                Log.d(Constants.TAG, "Requesting permission for " + usbDevice.getDeviceName());
+                usbManager.requestPermission(usbDevice,
+                        PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0));
+            }
+        }
+
+        // Close the activity
+        finish();
+    }
+}
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