Android Program to Show Surface View via Thread

 Android Program to Show Surface View via Thread

This Android Java Program lets you create Create a Surface View via Thread.

Here is source code of the Program to create a Surface View via Thread. The program is successfully compiled and run on a Windows system using Eclipse Ide. The program output is also shown below.

1.MainActivity.java:

import android.os.Bundle;

import android.app.Activity;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Canvas;

import android.view.Menu;

import android.view.MotionEvent;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

import android.view.View;

import android.view.View.OnTouchListener;

 

public class MainActivity extends Activity implements OnTouchListener{

 

    Ourview v;

    Bitmap bm;

    float x,y;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);

        v = new Ourview(this);

        v.setOnTouchListener(this);

        bm = BitmapFactory.decodeResource(getResources(), R.drawable.image4);

        x=0;y=0; 

        setContentView(v);

    }

 

    @Override

    protected void onPause() {

        // TODO Auto-generated method stub

        super.onPause();

        v.pause();

    }

 

    @Override

    protected void onResume() {

        // TODO Auto-generated method stub

        super.onResume();

        v.resume();

    }

 

    // surface view is going to be a thread now

    class Ourview extends SurfaceView implements Runnable {

 

        Thread th = null;

        SurfaceHolder holder;

        boolean var = false;

 

        public Ourview(Context context) {

            super(context);

            // TODO Auto-generated constructor stub

            holder = getHolder();

        }

 

        @Override

        public void run() {

            // TODO Auto-generated method stub

            while (var = true) {

                // do stuff

                if (!holder.getSurface().isValid()) {

                    continue;

                }

                Canvas c = holder.lockCanvas();// while drawing on a canvas we

                                                // lock it and after drawing on

                                                // it we unlock it

 

                c.drawARGB(255, 250, 150, 20);//rgb values

                c.drawBitmap(bm, x -(bm.getWidth()/2), y -(bm.getHeight()/2), null );

                holder.unlockCanvasAndPost(c);

            }

        }

 

        public void pause() {

 

            var = false;

            while (true) {

                try {

                    th.join();// would pause the currently executing thread till

                                // the user finishes its job

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                break;

            }

            th = null;

        }

 

        public void resume() {

            var = true;

            th = new Thread(this);

            th.start();

        }

    }

 

    @Override

    public boolean onTouch(View v, MotionEvent me) {

        // TODO Auto-generated method stub

        return false;

    }

 

}