android图像绘制(四)——Su易做图ceView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Su易做图ceView。
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 ImageSu易做图ceView extends Su易做图ceView implements Callback{
//用于控制Su易做图ceView
private Su易做图ceHolder 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;
/**
* Su易做图ceView初始化函数
*/
public ImageSu易做图ceView(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);
}
/**
* Su易做图ceView视图创建,响应此函数
*/
@Override
public void su易做图ceCreated(Su易做图ceHolder holder) {
System.out.println("ImageSu易做图ceView is su易做图ceCreated");
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);
}
}
}
/**
* Su易做图ceView视图状态发生改变,响应此函数
*/
@Override
public void su易做图ceChanged(Su易做图ceHolder holder, int format, int width, int height) {
System.out.println("ImageSu易做图ceView is su易做图ceChanged");
}
/**
* Su易做图ceView视图消亡时,响应此函数
*/
@Override
public void su易做图ceDestroyed(Su易做图ceHolder holder) {
System.out.println("ImageSu易做图ceView is su易做图ceDestroyed");
}
}
public class ImageSu易做图ceView extends Su易做图ceView implements Callback{
//用于控制Su易做图ceView
private Su易做图ceHolder 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;
/**
* Su易做图ceView初始化函数
*/
public ImageSu易做图ceView(Context context, AttributeSet attrs) {
super(context, attrs);
sfh = this.getHolder();
sfh.addCallback(this);
paint = new Paint();
paint.setColor(Color.WHITE);
paint.setAntiAlias(true);
setFocus
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