Hide call Screen during my app
<p>I want to block/unblock incoming call in my android app. I am able to do that using below code.</p>

<pre><code>telephony = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);
customPhoneListener = new PhoneCallStateListener(MainActivity.this, vSMS);
start.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        telephony.listen(customPhoneListener, 
                         PhoneStateListener.LISTEN_CALL_STATE);
        Toast.makeText(MainActivity.this, "START", Toast.LENGTH_SHORT).show();
    }
});

stop.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        telephony.listen(customPhoneListener,
                         PhoneStateListener.LISTEN_NONE);
        Toast.makeText(MainActivity.this, "STOP", Toast.LENGTH_SHORT).show();
        }
    });
}
</code></pre>

<p>but i want only hide to incoming call. not to block. 
is there any way to do this. i want no calling screen appare in my app when any incoming call during my app.  </p>
