SurfaceView使用总结

一，简单使用

可见以下链接，比较详细

http://www.cnblogs.com/devinzhang/archive/2012/02/03/2337559.html

二，刷新View

比如点击view时需要它重画

1. @Override
2. public boolean onTouchEvent(MotionEvent event) {
3. switch (event.getAction()) {
4. case MotionEvent.ACTION_DOWN:
5. case MotionEvent.ACTION_MOVE:
6. mXCross = event.getX();
7. mCrossEnabled = true;
8. // 重绘
9. if(myThread!=null && myThread.myHandler != null) {
10. myThread.myHandler.sendEmptyMessage(0);
11. }
12. // Log.e("on mXCross,mYCross==",mXCross + "," + mYCross);
13. break;
14. case MotionEvent.ACTION_UP :
15. mXCross = -1f;
16. mCrossEnabled = false;
17. // 重绘
18. if(myThread!=null && myThread.myHandler != null) {
19. myThread.myHandler.sendEmptyMessage(0);
20. }
21. break;
23. }
24. return true;
25. }

在子线程中绘制View，需要线程绑定一个Looper，需要handler

1. // 线程内部类
2. class MyThread extends Thread {
3. private SurfaceHolder holder;
4. private StockDrawWave drawWave;
6. MyHandler myHandler;// 用户子线程绘制UI
8. public MyThread(SurfaceHolder holder, StockDrawWave drawWave) {
9. this.holder = holder;
10. this.drawWave = drawWave;
11. }
13. class MyHandler extends Handler {
14. @Override
15. public void handleMessage(Message msg) {
16. drawTimeChar();// 以后刷新时都直接执行绘制方法
17. }
18. }

1. @Override
2. public void run() {// 此处为初始化，第一次绘制时运行
3. Looper.prepare();// Looper与Thread绑定
4. myHandler = new MyHandler();// 与Looper绑定
5. drawTimeChar();
6. Looper.loop();// 处理消息
7. }

View关闭时，终止线程并让其被回收

1. @Override
2. public void surfaceDestroyed(SurfaceHolder holder) {
3. if (myThread != null) {
4. myThread.isRun = false;
5. myThread.myHandler.getLooper().quit();// 终止looper循环，让线程可以被回收
6. myThread = null;
7. }
8. }

来自为知笔记(Wiz)

转载于:https://www.cnblogs.com/chenchengzhi/p/4915230.html