与View区别
更新View任务太重会导致UI线程阻塞
而SurfaceView不会，可以在UI线程之外更新UI
工程代码 SurfaceViewDemo.zip
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1. 使用SurfaceView 要点
2. 创建单个图形
3. 创建多个图形
4. 绘制组合图形
5. 使4中的组合图形动起来
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1. 使用SurfaceView 要点
* 通过 SurfaceHolder 控制Surface
* 一定是在Surface创建之后开始画布操作， 一定在Surface创建之前结束画布操作
集成 SurfaceView类，实现 SurfaceHolder.Callback 接口
在构造函数中调用： getHolder().addCallback(this);
框架如下：
public class MyView extends SurfaceView implements SurfaceHolder.Callback {
// 通过 SurfaceHolder 控制Surface
public MyView(Context context) {
super(context);
getHolder().addCallback(this);
}
public void draw() {
// 一定是在Surface创建之后开始画布操作
Canvas canvas = getHolder().lockCanvas();
// start
// end, 一定在Surface创建之前结束画布操作
getHolder().unlockCanvasAndPost(canvas);
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// Surface 改变的时候触发
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
draw();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
}2. 创建单个图形
修改如下，声明画笔 paint， 然后画一个红色的矩形
private Paint paint = null;
public MyView(Context context) {
super(context);
// TODO Auto-generated constructor stub
paint = new Paint();
paint.setColor(Color.RED);
getHolder().addCallback(this);
}
public void draw() {
// 一定是在Surface创建之后开始画布操作
Canvas canvas = getHolder().lockCanvas();
// start
canvas.drawColor(Color.WHITE);
canvas.drawRect(0, 0, 100, 100, paint);
// end, 一定在Surface创建之前结束画布操作
getHolder().unlockCanvasAndPost(canvas);
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" alt="" />
3. 创建多个图形
绘制两条垂直90度的直线，三个重要的步骤
canvas.save();// 保存成可编辑状态
canvas.rotate(90, getWidth()/2, getHeight()/2); //画布旋转90度
canvas.restore(); //重新恢复画布到正常状态(旋转前)，否则影响后面的绘制
public void draw() {
// 一定是在Surface创建之后开始画布操作
Canvas canvas = getHolder().lockCanvas();
// start
canvas.drawColor(Color.WHITE);
canvas.save();// 保存成可编辑状态
canvas.rotate(90, getWidth()/2, getHeight()/2); //画布旋转90度
canvas.drawLine(0, getHeight()/2, getWidth(), getHeight(), paint);
canvas.restore(); //重新恢复画布到正常状态(旋转前)
canvas.drawLine(0, getHeight()/2 + 100, getWidth(), getHeight()+100, paint);
// end, 一定在Surface创建之前结束画布操作
getHolder().unlockCanvasAndPost(canvas);
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" alt="" />
4. 绘制组合图形
创建容器 Container 类： 可以添加、删除子视图， 绘制view
创一个矩形Rec：
创建 圆 Circle：
在控件MyView中，添加一个容器，容器中放置一个矩形，矩形内放一个圆
public class Container {
private List<Container> children = null;
public Container() {
children = new ArrayList<Container>();
}
public void draw(Canvas canvas) {
childrenView(canvas);
for (Container c : children) {
c.draw(canvas);
}
}
public void addChirdrenView(Container c) {
children.add(c);
}
public void removeChirdrenView(Container c) {
children.remove(c);
}
public void childrenView(Canvas canvas) {
// TODO Auto-generated method stub
}
}public class Rect extends Container {
private Paint paint;
public Rect(){
paint = new Paint();
paint.setColor(Color.RED);
}
@Override
public void childrenView(Canvas canvas) {
super.childrenView(canvas);
canvas.drawRect(0, 0, 100, 100, paint);
}
}public class Circle extends Container {
private Paint paint;
public Circle(){
paint = new Paint();
paint.setColor(Color.BLUE);
}
@Override
public void childrenView(Canvas canvas) {
//
super.childrenView(canvas);
canvas.drawCircle(60, 60, 50, paint);
}
}public class MyView extends SurfaceView implements SurfaceHolder.Callback {
// 通过 SurfaceHolder 控制Surface
private Container container;
private Rect rect;
private Circle circle;
public MyView(Context context) {
super(context);
// TODO Auto-generated constructor stub
container = new Container();
rect = new Rect();
circle = new Circle();
rect.addChirdrenView(circle);
container.addChirdrenView(rect);
getHolder().addCallback(this);
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// Surface 改变的时候触发
draw() ;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
public void draw() {
// 一定是在Surface创建之后开始画布操作
Canvas canvas = getHolder().lockCanvas();
// start
canvas.drawColor(Color.WHITE);
container.draw(canvas);
// end, 一定在Surface创建之前结束画布操作
getHolder().unlockCanvasAndPost(canvas);
}
}aaarticlea/png;base64,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" alt="" />
5. 使4中的组合图形动起来
修改容器类Container：
public void draw(Canvas canvas) {
canvas.save();
canvas.translate(getX(), getY());
childrenView(canvas);
for (Container c : children) {
c.draw(canvas);
}
canvas.restore();
}修改矩形：
public void childrenView(Canvas canvas) {
super.childrenView(canvas);
canvas.drawRect(0, 0, 100, 100, paint);
this.setY(this.getY()+3);
}在 MyView 控件中增加timer
private Timer timer = null;
private TimerTask task = null; public void startTimer(){
timer = new Timer();
task = new TimerTask() { @Override
public void run() {
// TODO Auto-generated method stub
draw();
}
};
timer.schedule(task, 100, 100); //每100ms执行一次
} public void stopTimer(){
if (timer != null) {
timer.cancel();
timer = null;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// surface 创建之后
startTimer();
} @Override
public void surfaceDestroyed(SurfaceHolder holder) {
// surface 销毁之前
stopTimer();
} @Override
protected void onDetachedFromWindow() {
// TODO Auto-generated method stub
stopTimer(); //不加这句，应用程序退出时会死
super.onDetachedFromWindow();
}
工程代码 SurfaceViewDemo.zip