Android中SurfaceView的使用示例

SurfaceView在游戏开发中有着举足轻重的地位，它对于画面的控制有着更大的自由度（不像View要用handler来更新，关于View的），但这方面的参考资料并不是太多，能找到的例子都有点喧宾夺主的感觉，不能把使用的流程清晰展示出来，下面是个简单的示例，力求把流程清楚展示，其他的可简则简。

程序效果：用线程画一个蓝色的长方形。

Java代码



package com.ray.test;

/*

* SurfaceView的示例程序

* 演示其流程

*/

import android.app.Activity;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.RectF;

import android.os.Bundle;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

public class Test extends Activity {

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(new MyView(this));

}

//内部类

class MyView extends SurfaceView implements SurfaceHolder.Callback{

SurfaceHolder holder;

public MyView(Context context) {

super(context);

holder = this.getHolder();//获取holder

holder.addCallback(this);

//setFocusable(true);

}

@Override

public void surfaceChanged(SurfaceHolder holder, int format, int width,

int height) {

}

@Override

public void surfaceCreated(SurfaceHolder holder) {

new Thread(new MyThread()).start();

}

@Override

public void surfaceDestroyed(SurfaceHolder holder) {

}

//内部类的内部类

class MyThread implements Runnable{

@Override

public void run() {

Canvas canvas = holder.lockCanvas(null);//获取画布

Paint mPaint = new Paint();

mPaint.setColor(Color.BLUE);

canvas.drawRect(new RectF(40,60,80,80), mPaint);

holder.unlockCanvasAndPost(canvas);//解锁画布，提交画好的图像

}

}

}

}

package com.ray.test;
/*
* SurfaceView的示例程序
* 演示其流程
*/
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class Test extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new MyView(this));
}

//内部类
class MyView extends SurfaceView implements SurfaceHolder.Callback{

SurfaceHolder holder;
public MyView(Context context) {
super(context);
holder = this.getHolder();//获取holder
holder.addCallback(this);
//setFocusable(true);

}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {

}

@Override
public void surfaceCreated(SurfaceHolder holder) {
new Thread(new MyThread()).start();
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {

}

//内部类的内部类
class MyThread implements Runnable{

@Override
public void run() {
Canvas canvas = holder.lockCanvas(null);//获取画布
Paint mPaint = new Paint();
mPaint.setColor(Color.BLUE);

canvas.drawRect(new RectF(40,60,80,80), mPaint);
holder.unlockCanvasAndPost(canvas);//解锁画布，提交画好的图像

}

}

}
}

TestSurfaceView0.1.rar (25.6 KB)