Documentation related to Android-5.1 based Firmware releases 


Documentation related to Android-4.2.2 based Firmware releases 



In order to use the off/on hook events of the handset for 3rd party Applications, please check out codes below:

Maxwell Phone app is using com.maxwell.action.CMBS.CRADLE.EVENT for on/off hook events.

private static final String ACTION_CRADLE_EVENT = "com.maxwell.action.CMBS.CRADLE.EVENT"; 
private static final int EVENT_OFF_HOOK = 1; 
private static final int EVENT_ON_HOOK = 2;

public void onResume() {
     IntentFilter intentFilter = new IntentFilter(ACTION_CRADLE_EVENT);
     registerReceiver(mMyHandsetObserver, intentFilter);

public void onDestroy() {

private class MyHandsetObserver extends BroadcastReceiver {
     public void onReceive(Context context, Intent intent) {
         if (intent.getAction().equals(ACTION_CRADLE_EVENT)) {
             int state = intent.getIntExtra("EXTRA_CRADLE_EVENT_TYPE", -1);
             switch (state) {
                 case EVENT_ON_HOOK:
                     mTextView.setText("Handset: Disconnected");
                 case EVENT_OFF_HOOK:
                     mTextView.setText("Handset: Connected");

In AndroidManifest.xml
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

Remark: If problems raising up after the update to a Android-5.1 based firmware, please be aware, that the virtual machine was changed from "dalvik" (in jellybean) to "art" (in lollipop) which is more strict in case of native code ( Unfortunately it is not possible to switch back to dalvik in Lollipop.

  • No labels