ImageView Tool

package com.example.imgview;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.os.Build;

public class MainActivity extends ActionBarActivity {

    //this is global method 
    @Override
    public boolean onTouchEvent(MotionEvent event) {
         TextView tv = (TextView) findViewById(R.id.textView1);
         
            int x = (int) event.getX();
            int y  = (int) event.getY();
            tv.setText("X:"+x+"  Y:"+y);
        return super.onTouchEvent(event);
    }

    int count = 0 ;
    //store image 
    int[] pic = {
            R.drawable.s1,
            R.drawable.s2,
            R.drawable.s3,
            R.drawable.s4,
    };
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //get full screen width 
//        this.getWindowManager().getDefaultDisplay().getWidth();
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final ImageView iv1 =(ImageView) findViewById(R.id.imageView1);
        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment()).commit();
        }
        Button bnex = (Button) findViewById(R.id.bnex);
        Button bpri = (Button) findViewById(R.id.bpri);
        
        bnex.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                ImageView iv = (ImageView) findViewById(R.id.imageView1);
                count-- ;
                if(count<=0){
                    count = 3 ;
                }
                iv.setImageResource(pic[count]);
            }
        });
        bpri.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                ImageView iv = (ImageView) findViewById(R.id.imageView1);
                count++ ;
                if(count>=3){
                    count = 0 ;
                }
                iv.setImageResource(pic[count]);
            }
        });
        iv1.setOnTouchListener(new OnTouchListener() {
            
            @Override
            public boolean onTouch(View arg0, MotionEvent arg1) {
                 if(arg1.getAction()==MotionEvent.ACTION_DOWN){
                     if(count>=3)count  =  0 ;
                     count++;
                     iv1.setImageResource(pic[count]);
                 }else if(arg1.getAction()==MotionEvent.ACTION_UP)
                 {
                     count-- ;
                     if(count<=0)count = 3 ;
                     iv1.setImageResource(pic[count]);
                 }
                return false;
            }
        });
        
        
        
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.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();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container,
                    false);
            return rootView;
        }
    }

}