How to access the showCallScreenWithDialpad method?

I'm not able to access the showCallScreenWithDialpad method of the com.android.internal.telephony.ITelephony.AIDL class. I've already tried reflection and I could not. You can not instantiate the class ITelephony$Stub . I also tried for bindService and also could not ( bindService returns false ). Can anyone help?

What I want to do is to hide the Android calling screen, ie make a phone call and the default call screen does not appear.

Below is what I've tried.

By reflection:

 .
 .
 .
 classCallManager = classLoader.loadClass("com.android.internal.telephony.ITelephony$Stub");
 getITelephonyMethod = classCallManager.getMethod("onTransact", cArg); 
 objeto = classCallManager.newInstance();
 getITelephonyMethod.invoke(objeto, 1, "1234567", "1234567", 1); 

This gives an error:

  

Caused by: java.lang.NullPointerException: null receiver

Because the object variable is equal to null , because the class can not be instantiated:

  

W / System.err: java.lang.InstantiationException: class com.android.internal.telephony.ITelephony $ Stub can not be instantiated

Now for bindService:

    .
    . 
    .

    final ServiceConnection conexao = this;
    Class classeServico2 = ITelephony.class;

    boolean resultado = bindService(new Intent(MainActivity.this, classeServico2), conexao, Context.BIND_AUTO_CREATE);

And bindService returns false .