Identify User Gesture

Gesture Detectors.java

package com.example.shohruh.eventhandling;

import android.graphics.Color;
import android.support.v4.view.GestureDetectorCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements GestureDetector.OnGestureListener,
GestureDetector.OnDoubleTapListener{

    private GestureDetectorCompat gestureDetector;
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textView = (TextView) findViewById(R.id.txtGesture);
        gestureDetector = new GestureDetectorCompat(this,this);
        gestureDetector.setOnDoubleTapListener(this);



//
//        final TextView txtView = (TextView)findViewById(R.id.txthello);
//        Button btnClick =  (Button) findViewById(R.id.btnClick);
//
//        btnClick.setOnClickListener(
//                new View.OnClickListener() {
//                    @Override
//                    public void onClick(View v) {
//                        txtView.setText("Hello World");
//                        txtView.setTextColor(Color.RED);
//                    }
//                }
//        );
//
//
//
//        btnClick.setOnLongClickListener(
//                new Button.OnLongClickListener(){
//
//                    @Override
//                    public boolean onLongClick(View v) {
//                        txtView.setText("Long pressed Hello World!");
//
//
//                        return true;
//                    }
//                }
//        );
//


    }


    @Override
    public boolean onTouchEvent(MotionEvent event) {
        this.gestureDetector.onTouchEvent(event);
        return super.onTouchEvent(event);
    }

    @Override
    public boolean onSingleTapConfirmed(MotionEvent e) {
        textView.setText("Single Tap Confirmed");
        return true;
    }

    @Override
    public boolean onDoubleTap(MotionEvent e) {
        textView.setText("Double Tap");
        return true;
    }

    @Override
    public boolean onDoubleTapEvent(MotionEvent e) {
        textView.setText("Double Tap Event - Strange");
        return true;
    }

    @Override
    public boolean onDown(MotionEvent e) {
        textView.setText("Down \\/");
        return true;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        textView.setText("When Pressed");
    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        textView.setText("Up /\\");
        return true;
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        textView.setText("Scroll");
        return true;
    }

    @Override
    public void onLongPress(MotionEvent e) {
        textView.setText("Long Pressed");
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        textView.setText("Fling - Fast");
        return true;
    }
}