Android TNB 21. Button Text Gesture Practice

Create a app that has a button and a text above it.
1.When you click the button, the text above it changes.
2.When you scroll, the text above it changes.
//-------------------------------------------------------------------------------------------------------------------------------------
//strings.xml
<resources>
    <string name="app_name">Event Handling: How To Make Your App Interactive</string>

    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>
    <string name="message_text">Hello</string>
    <string name="button_text">Click me Hoss</string>
</resources>


//-------------------------------------------------------------------------------------------------------------------------------------

package com.thenewboston.myapplicationpracticebuttongestures;

import android.support.v4.view.GestureDetectorCompat;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;


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

    private TextView helloText;
    private GestureDetectorCompat gestureDetector;


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

        Button button = (Button)findViewById(R.id.button);

        button.setOnClickListener(
                new Button.OnClickListener() {
                    public void onClick(View v) {
                        TextView helloText = (TextView) findViewById(R.id.helloText);
                        helloText.setText("Good Job YoYo!");
                    }
                }
        );

        button.setOnLongClickListener(
                new Button.OnLongClickListener() {
                    public boolean onLongClick(View v) {
                        TextView helloText = (TextView) findViewById(R.id.helloText);
                        helloText.setText("That was a long press");
                        return true; //whenever we have an OnLongClick we need a "return true"
                    }
                }

        );



        helloText = (TextView)findViewById(R.id.helloText);
        this.gestureDetector = new GestureDetectorCompat(this,this);
        gestureDetector.setOnDoubleTapListener(this);
    }

    ///////////////////////////Begin Gestures///////////////////////////////////


    @Override  //You need to Override onTouchEvent. onTouchEvent is the default method called when user touches the screen.
    public boolean onTouchEvent(MotionEvent event) {
        this.gestureDetector.onTouchEvent(event); //we want it to detect if the touch is a gesture first
        return super.onTouchEvent(event);
    }

    @Override
    public boolean onDown(MotionEvent e) {
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {

    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        return false;
    }

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

    @Override
    public void onLongPress(MotionEvent e) {

    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        return false;
    }

    ///////////////////////////End Gestures///////////////////////////////////

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public boolean onSingleTapConfirmed(MotionEvent e) {
        return false;
    }

    @Override
    public boolean onDoubleTap(MotionEvent e) {
        return false;
    }

    @Override
    public boolean onDoubleTapEvent(MotionEvent e) {
        return false;
    }
}