我正在使用MultiTouch-Controller类(https://code.google.com/p/android-multitouch-controller/)并尝试调整MtPhotoSortr示例,以便每帧都保存在drawable上绘制的圆。
从广义上讲,如果我有一个带有onDraw()函数的视图,是否可以将位图/画布的内容“复制”到一个drawable中,而不是每帧初始化它。
现在我有
public class A extends View implements MultiTouchObjectCanvas<MultiTouchControllerView.Img> {
Drawable d;
Bitmap bmp;
Canvas bmpCanvas;
void init()
{
/// initialized everything correctly .
bmpCanvas=new Canvas(bmp);
}
// other functions that scale,rotate and translate the drawable only ....
// like scaleandposition drawable on touch ,etc....
void onDraw(Canvas canvas)
{
d.draw(canvas);
bmpCanvas.drawCircle(touchX,touchY,radius,mPaint);
/// Combine d and bmpCanvas ,without using d=new BitmapDrawable(bmp);
}
}
任何指针都会非常感激!
干杯, [R