public class MainActivity extends Activity {

    TelephonyManager tm;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
        tm.listen(mPhoneListener, PhoneStateListener.LISTEN_CALL_STATE);
    }

    private void call() {
        try {
            startActivity(new Intent(Intent.ACTION_CALL, Uri.parse("tel:"
                    + "1111111")));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private PhoneStateListener mPhoneListener = new PhoneStateListener() {
        public void onCallStateChanged(int state, String incomingNumber) {
            try {
                switch (state) {
                case TelephonyManager.CALL_STATE_RINGING:
                    Toast.makeText(MainActivity.this, "CALL_STATE_RINGING",
                            Toast.LENGTH_SHORT).show();
                    break;
                case TelephonyManager.CALL_STATE_OFFHOOK:
                    Toast.makeText(MainActivity.this, "CALL_STATE_OFFHOOK",
                            Toast.LENGTH_SHORT).show();
                    break;
                case TelephonyManager.CALL_STATE_IDLE:
                    //(Trying) SystemClock.sleep(10000);
                    Toast.makeText(MainActivity.this, "CALL_STATE_IDLE",
                            Toast.LENGTH_SHORT).show(); // This is shown!
                    call(); // This doesn't call again !
                    break;
                default:
                    Toast.makeText(MainActivity.this, "default",
                            Toast.LENGTH_SHORT).show();
                    Log.i("Default", "Unknown phone state=" + state);
                }
            } catch (Exception e) {
                Log.i("Exception", "PhoneStateListener() e = " + e);
            }
        }
    };
}