android图像绘制（四）——SurfaceView问题，自定义控件

自定义控件（类似按钮等）的使用，自定义一个SurfaceView。

如某一块的动态图（自定义相应），或者类似UC浏览器下面的工具栏。

如下图示例：

自定义类代码：

[java]
public class ImageSurfaceView extends SurfaceView implements Callback{
    //用于控制SurfaceView
    private SurfaceHolder sfh;
    private Handler handler = new Handler();
    private ImageRunnable imageRunnable = new ImageRunnable();
    private Paint paint;
    private Canvas canvas;
    private Matrix matrix;

    /**图片的坐标*/
    private float imageX, imageY;
    /**获取的图片*/
    private Bitmap bmp;
    /**图片宽高*/
    private float bmpW, bmpH;
    /**屏幕大小*/
    private int screenW, screenH;

    /**
     * SurfaceView初始化函数
     */
    public ImageSurfaceView(Context context, AttributeSet attrs) {
        super(context, attrs);
        sfh = this.getHolder();
        sfh.addCallback(this);
        paint = new Paint();
        paint.setColor(Color.WHITE);
        paint.setAntiAlias(true);
        setFocusable(true);
    }
    /**
     * SurfaceView视图创建，响应此函数
     */
    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        System.out.println("ImageSurfaceView is surfaceCreated");
        screenH = this.getHeight();
        screenW = this.getWidth();
                handler.post(imageRunnable);
    }
    /**
     * 游戏绘图
     */
    public void draw() {
        try {
            canvas = sfh.lockCanvas();
            canvas.drawRGB(0, 0, 0);
            canvas.save();
            //绘制
            canvas.drawBitmap(bmp, matrix, paint);
            System.out.println("绘制图像了吗？");
            canvas.restore();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (canvas != null)
                sfh.unlockCanvasAndPost(canvas);
        }
    }
    /**
     * 触屏事件监听
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return true;
    }

    /**
     * 图片的线程运行
     */
    class ImageRunnable implements Runnable{
        @Override
        public void run() {
            long start = System.currentTimeMillis();
            draw();
            long end = System.currentTimeMillis();
            if (end - start < 500) {
                handler.postDelayed(this, 200 - (end-start));
            }else{
                handler.post(this);
            }
        }
    }

    /**
     * SurfaceView视图状态发生改变，响应此函数
     */
    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        System.out.println("ImageSurfaceView is surfaceChanged");
    }
    /**
     * SurfaceView视图消亡时，响应此函数
     */
    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        System.out.println("ImageSurfaceView is surfaceDestroyed");
    }
}
public class ImageSurfaceView extends SurfaceView implements Callback{
//用于控制SurfaceView
private SurfaceHolder sfh;
private Handler handler = new Handler();
private ImageRunnable imageRunnable = new ImageRunnable();
private Paint paint;
private Canvas canvas;
private Matrix matrix;

/**图片的坐标*/
private float imageX, imageY;
/**获取的图片*/
private Bitmap bmp;
/**图片宽高*/
private float bmpW, bmpH;
/**屏幕大小*/
private int screenW, screenH;

/**
* SurfaceView初始化函数
*/
public ImageSurfaceView(Context context, AttributeSet attrs) {
  super(context, attrs);
  sfh = this.getHolder();
  sfh.addCallback(this);
  paint = new Paint();
  paint.setColor(Color.WHITE);
  paint.setAntiAlias(true);
  setFocus

补充：移动开发 , Android ,