How to use FirebaseInstanceId.getInstance (). DeleteInstanceId ()?

Question

I want to remove my FireBaseInstance using

FirebaseInstanceId.getInstance().deleteInstanceId() 

I use the try / catch block, but I get a whis error:

 > W/System.err: java.io.IOException: MAIN_THREAD W/System.err: at > com.google.firebase.iid.zzd.zzb(Unknown Source) W/System.err: at > com.google.firebase.iid.FirebaseInstanceId.deleteInstanceId(Unknown > Source) W/System.err: at > package.class.onCreate(DatenLadenActivity.java:57) > W/System.err: at > android.app.Activity.performCreate(Activity.java:6272) W/System.err: > at > android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) > W/System.err: at > android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2387) > W/System.err: at > android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2494) > W/System.err: at > android.app.ActivityThread.access$900(ActivityThread.java:157) > W/System.err: at > android.app.ActivityThread$H.handleMessage(ActivityThread.java:1356) > W/System.err: at > android.os.Handler.dispatchMessage(Handler.java:102) W/System.err: > at android.os.Looper.loop(Looper.java:148) W/System.err: at > android.app.ActivityThread.main(ActivityThread.java:5525) > W/System.err: at java.lang.reflect.Method.invoke(Native Method) > W/System.err: at > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730) > W/System.err: at > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620) 

Thanks for your answers and sorry for my bad english :)

Answer 1

deleteInstanceId() is a blocking call. It cannot be called in the main thread. If you only need to call it for development and testing, you can use a simple Thread :

  new Thread(new Runnable() { @Override public void run() { try { FirebaseInstanceId.getInstance().deleteInstanceId(); } catch (IOException e) { e.printStackTrace(); } } }).start();