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我創建了一個動畫(通過下面的代碼)的一個彈跳球。如何停止動畫
我想知道如何在特定條件下停止動畫,例如10秒後或球到達特定座標時。
代碼:基於您的代碼
public class MyDemoView extends ImageView{
private Context mContext;
int x = -1;
int y = -1;
private int xVelocity = 10;
private int yVelocity = 5;
private Handler h;
private final int FRAME_RATE = 30;
public MyDemoView(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
h = new Handler();
}
private Runnable r = new Runnable() {
@Override
public void run() {
invalidate();
}
};
protected void onDraw(Canvas c) {
BitmapDrawable ball = (BitmapDrawable) mContext.getResources().getDrawable(R.drawable.ball);
if (x<0 && y <0) {
x = this.getWidth()/2;
y = this.getHeight()/2;
} else {
x += xVelocity;
y += yVelocity;
if ((x > this.getWidth() - ball.getBitmap().getWidth()) || (x < 0)) {
xVelocity = xVelocity*-1;
}
if ((y > this.getHeight() - ball.getBitmap().getHeight()) || (y < 0)) {
yVelocity = yVelocity*-1;
}
}
c.drawBitmap(ball.getBitmap(), x2, y2, null);
h.postDelayed(r, FRAME_RATE);
}
}