Question

我有一个类，即animatedview.java。这个类给出了一个动画，比如，图像从下到上，从上到下移动。我要求我想将图像从中间和底部的底部移动到中点，如下面的屏幕！

我希望以后能够达到这个位置

enter image description here

mycode是：

公共类AnimatedView扩展了ImageView {

static int count=0;
private Context mContext;
int x = 150;
int y = 450;
private float a,b;
private int yVelocity = 20;
private Handler h;
private final int FRAME_RATE = 25;
BitmapDrawable ball;
boolean touching;
boolean dm_touched = false;

int bm_x = 0, bm_y = 0, bm_offsetx, bm_offsety,bm_w,bm_h;

public AnimatedView(Context context, AttributeSet attrs)  {  
    super(context, attrs);  
    mContext = context;  
    h = new Handler();

} 
private Runnable r = new Runnable() {
    @Override
    public void run() {
        if(touching = true)
        invalidate(); 
    }
};

@Override
protected void onDraw(Canvas c) {  
    BitmapDrawable ball = (BitmapDrawable) mContext.getResources().getDrawable(R.drawable.ball);  
    if (x<0 && y <0) {
        //x = this.getWidth()/2;
        y = c.getHeight()/2;

    } else {
        y += yVelocity;
        if (y >( this.getHeight() - ball.getBitmap().getHeight()) ||(y <0)) {
            yVelocity = yVelocity*-1;
        }
    }
    c.drawBitmap(ball.getBitmap(), x, y, null);  
  if(touching){
    h.postDelayed(r, FRAME_RATE);    
    bm_w=ball.getBitmap().getWidth();
    bm_h=ball.getBitmap().getHeight();
  }
}
@Override
public boolean onTouchEvent(MotionEvent event) {
    int touchType = event.getAction();

     switch(touchType){
        case MotionEvent.ACTION_MOVE: 
            a = event.getX();
            b = event.getY();
            touching = true;
            break;

         case MotionEvent.ACTION_DOWN: 
             //x and y give you your touch coordinates
              a = event.getX();
              b = event.getY();
              touching = true;
              Log.d("bharat","action_down called");
              if ((a > x) && (a < bm_w + x) && (b > y) && (b < bm_h + y)) {
                  count++;

                   Log.i("bharat",""+count);

                }

                dm_touched = true;
         case MotionEvent.ACTION_UP:
             a = event.getX();
              b = event.getY();
             if(a>x+20&&a<330&&b<=y+320&&b>y)
             invalidate();
            default:

                dm_touched = true;
                touching = true;

            }

            return true;
}

}

请帮帮我

Answer 1

如果我理解正确，这应该解决它：而不是y＆lt; 0，你应该把y＆lt; c.getHeight（）/ 2

@Override
protected void onDraw(Canvas c) {  
BitmapDrawable ball = (BitmapDrawable) mContext.getResources().getDrawable(R.drawable.ball);  
if (x<0 && y <0) {
    //x = this.getWidth()/2;
    y = c.getHeight()/2;

} else {
    y += yVelocity;
    if (y >( this.getHeight() - ball.getBitmap().getHeight()) ||(y <c.getHeight()/2)) {
        yVelocity = yVelocity*-1;
    }
}
c.drawBitmap(ball.getBitmap(), x, y, null);  
if(touching){
h.postDelayed(r, FRAME_RATE);    
bm_w=ball.getBitmap().getWidth();
bm_h=ball.getBitmap().getHeight();
}
}

如何将图像移动到屏幕底部和中心的中点

1 个答案: