自定义控件动画TextView

た入场券 2022-06-09 13:35 213阅读 0赞

public class CTextView extends android.support.v7.widget.AppCompatTextView { 
        private Paint paint;
    
        public CTextView(Context context) {
            this(context, null);
        }
    
        public CTextView(Context context, @Nullable AttributeSet attrs) {
            this(context, attrs, 0);
        }
    
        public CTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
            super(context, attrs, defStyleAttr);
            initParams();
        }
    
        private int viewWidth, viewHeight;//控件宽高
    
        private void initParams() {
    // viewWidth = viewHeight = 200;
            paint = new Paint();
            paint.setColor(Color.parseColor("#FFB300"));
            paint.setStrokeWidth(1);
            paint.setAntiAlias(true);
            paint.setStyle(Paint.Style.STROKE);
            setGravity(Gravity.CENTER);
        }
    
        @Override
        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
            viewWidth = getMeasuredWidth();
            viewHeight = getMeasuredHeight();
        }
    
    
        @Override
        protected void onDraw(Canvas canvas) {
            super.onDraw(canvas);
            canvas.drawCircle(viewWidth / 2f, viewHeight / 2f, viewWidth / 2f - paint.getStrokeWidth(), paint);
        }
    
        public void startAnim() {
            ObjectAnimator sx = ObjectAnimator.ofFloat(this, "scaleY", 0.5f, 1f);
            ObjectAnimator sy = ObjectAnimator.ofFloat(this, "scaleX", 0.5f, 1f);
            ObjectAnimator fadeOutIn = ObjectAnimator.ofFloat(this, "alpha", 0f, 1f, 0.9f, 1f, 0f);
            AnimatorSet animSet = new AnimatorSet();
            animSet.play(sx).with(sy).with(fadeOutIn);
            animSet.setDuration(2000);
            animSet.start();
            animSet.addListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationEnd(Animator animation) {
                    super.onAnimationEnd(animation);
                    animFinishListener.onFinish();
                }
            });
        }
    
        public interface onAnimFinishListener { 
            void onFinish();
        }
    
        private onAnimFinishListener animFinishListener;
    
        public void setOnAnimFinishListener(onAnimFinishListener animFinishListener) {
            this.animFinishListener = animFinishListener;
        }
    }