Simple SurfaceView example

It's a simple example to draw draw something on SurfaceView.

Simple SurfaceView example

Create our custom MySurfaceView.java extends SurfaceView.

package com.example.androidsurfaceview;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class MySurfaceView extends SurfaceView {
 
    private SurfaceHolder surfaceHolder;
    private Bitmap bmpIcon;

 public MySurfaceView(Context context) {
  super(context);
  init();
 }

 public MySurfaceView(Context context, 
   AttributeSet attrs) {
  super(context, attrs);
  init();
 }

 public MySurfaceView(Context context, 
   AttributeSet attrs, int defStyle) {
  super(context, attrs, defStyle);
  init();
 }
 
 private void init(){
  surfaceHolder = getHolder();
  bmpIcon = BitmapFactory.decodeResource(getResources(), 
    R.drawable.ic_launcher);
  surfaceHolder.addCallback(new SurfaceHolder.Callback(){

   @Override
   public void surfaceCreated(SurfaceHolder holder) {
    Canvas canvas = holder.lockCanvas(null);
                drawSomething(canvas);
                holder.unlockCanvasAndPost(canvas);
   }

   @Override
   public void surfaceChanged(SurfaceHolder holder, 
     int format, int width, int height) {
    // TODO Auto-generated method stub
    
   }

   @Override
   public void surfaceDestroyed(SurfaceHolder holder) {
    // TODO Auto-generated method stub
    
   }});
 }

 protected void drawSomething(Canvas canvas) {
  canvas.drawColor(Color.BLACK);
        canvas.drawBitmap(bmpIcon, 
          getWidth()/2, getHeight()/2, null);
 }

}

Modify /res/layout/activity_main.xml to include <...MySurfaceView>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.androidsurfaceview.MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:autoLink="web"
        android:text="http://android-er.blogspot.com/"
        android:textStyle="bold" />

    <com.example.androidsurfaceview.MySurfaceView
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

MainActivity.java

package com.example.androidsurfaceview;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity extends Activity {

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

 }

}

Next:
- Create animation on SurfaceView in background Thread