自定义圆从屏幕左上角匀速移动到右下角

MyView 


import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.support.annotation.Nullable;import android.util.AttributeSet;import android.view.View;public class MyView extends View {    private float currentX = 100 ;    private float currentY = 100 ;    private Paint paint = new Paint() ;    public MyView(Context context) {        super(context);    }    public MyView(Context context, @Nullable AttributeSet attrs) {        super(context, attrs);    }    public MyView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onDraw(Canvas canvas) {        // TODO Auto-generated method stub        super.onDraw(canvas);        paint.setColor(Color.RED) ;        canvas.drawCircle(currentX, currentY, 50, paint) ;    }}


//移动圆
private void initView() {    final MyView rv = (MyView) findViewById(R.id.main_rv);    WindowManager wm = this.getWindowManager();    int width = wm.getDefaultDisplay().getWidth();    int height = wm.getDefaultDisplay().getHeight();    float curTranslationX = rv.getTranslationX();    float curTranslationY = rv.getTranslationY();    ObjectAnimator animator = ObjectAnimator.ofFloat(rv, "translationX", curTranslationX, width);    ObjectAnimator animator1 = ObjectAnimator.ofFloat(rv, "translationY", curTranslationY, height);    AnimatorSet animSet = new AnimatorSet();    animSet.playTogether(animator, animator1);    animSet.setDuration(5000);    animSet.start();    animSet.addListener(new Animator.AnimatorListener() {        @Override        public void onAnimationStart(Animator animator) {        }        @Override        public void onAnimationEnd(Animator animator) {            rv.setVisibility(View.GONE);        }        @Override        public void onAnimationCancel(Animator animator) {        }        @Override        public void onAnimationRepeat(Animator animator) {        }    });}