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POhow to instantiate a listener by reflection in Android
 

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    <p>I have to develop an application for Android 1.6 (API 4), which should be able to use the OnAudioFocusChangeListener (available since Android 2.2 - API 8) in the phones with Android 2.2 or later.</p> <p>Anyone can tell me how to instantiate a listener by reflection? I have already managed to run static and also non-static methods by reflection, but I don't know how to do with listeners.</p> <p>This is the listener to reflect:</p> <pre><code>AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); OnAudioFocusChangeListener audioListener = new OnAudioFocusChangeListener() { @Override public void onAudioFocusChange(int focusChange) { // code to execute } }; public void getAudioFocus() { audioManager.requestAudioFocus(audioListener, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN); } public void releaseAudioFocus() { audioManager.abandonAudioFocus(audioListener); } </code></pre> <p>This is a code example with methods I managed to run by reflection:</p> <pre><code>Class BluetoothAdapter = Class.forName("android.bluetooth.BluetoothAdapter"); Method methodGetDefaultAdapter = BluetoothAdapter.getMethod("getDefaultAdapter"); // static method from the BluetoothAdapter class returning a BluetoothAdapter object Object bluetooth = methodGetDefaultAdapter.invoke(null); Method methodGetState = bluetooth.getClass().getMethod("getState"); // non-static method executed from the BluetoothAdapter object (which I called "bluetooth") returning an int int bluetoothState = (Integer) methodGetState.invoke(bluetooth); </code></pre>
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    1. COHere is good example http://blogs.oracle.com/poonam/entry/how_to_implement_an_interface
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