Twitter的like动画安卓版 - 备选方案

英文： Twitter’s like animation in Android - alternative
相关动画网址：http://frogermcs.github.io/twitters-like-animation-in-android-alternative/，
更多动画网址：http://frogermcs.github.io/
作者来源：Miroslaw Stanek

小编自己遇到的问题：最近在研究一个Twitter的like动画安卓版，在任何手机上面都可以正常播放动画，只有在一个htc的手机上面，没有任何错误日志，动画播放不出来
操作：设置–》开发者选择–》高级选项–》动画，把动画的选项打开就好了。

不久前Twitter展示了具有现代感的心形动画－作为star图标的替代。

虽然实现这个动画最简单的方法是使用 Frame Animation ，但是我们尝试用更灵活的方法来实现－手动绘制并用属性动画。这篇文章只是概要，没有深入的技术细节

一：实现

我们将创建一个名叫LikeButtonView的view，它是一个由三个子view构成的FrameLayout－ CircleView 显示星星图标下面的圆，ImageView （星星）以及代表按钮周围浮点的DotsView 。

CircleView

这个视图负责绘制星星图标下面的大圆。它本可以实现得更简单（通过xml ），但是这里我们应该考虑按钮下面的背景颜色。

我们在canvas上绘制圆的实现：

Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    tempCanvas.drawColor(0xffffff, PorterDuff.Mode.CLEAR);
    tempCanvas.drawCircle(getWidth() / 2, getHeight() / 2, outerCircleRadiusProgress * maxCircleSize, circlePaint);
    tempCanvas.drawCircle(getWidth() / 2, getHeight() / 2, innerCircleRadiusProgress * maxCircleSize, maskPaint);
    canvas.drawBitmap(tempBitmap, 0, 0, null);
}

先使用CLEAR 模式绘制颜色以清除canvas。然后根据给定的进度（各自的进度是独立的）绘制内外圆。

内圆使用这样定义的mask paint ：

Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);
    maxCircleSize = w / 2;
    tempBitmap = Bitmap.createBitmap(getWidth(), getWidth(), Bitmap.Config.ARGB_8888);
    tempCanvas = new Canvas(tempBitmap);
}

我们需要完全透明，不然的话内圆就会显示窗口颜色。

对于那些眼睛机灵的人应该还注意到了另外一件事－我们的外圆颜色是基于当前进度而变化的。这是通过 ArgbEvaluator 类来完成，该类可以基于一个给定的因子在两个颜色之间变换：

private void updateCircleColor() {
    float colorProgress = (float) Utils.clamp(outerCircleRadiusProgress, 0.5, 1);
    colorProgress = (float) Utils.mapValueFromRangeToRange(colorProgress, 0.5f, 1f, 0f, 1f);
    this.circlePaint.setColor((Integer) argbEvaluator.evaluate(colorProgress, START_COLOR, END_COLOR));
}

三：DotsView

这个view将绘制浮动在星星图标周围的圆点。跟CircleView一样，它是使用onDraw()来做这件事的：

protected void onDraw(Canvas canvas) {
    drawOuterDotsFrame(canvas);
    drawInnerDotsFrame(canvas);
}

private void drawOuterDotsFrame(Canvas canvas) {
    for (int i = 0; i < DOTS_COUNT; i++) {
        int cX = (int) (centerX + currentRadius1 * Math.cos(i * OUTER_DOTS_POSITION_ANGLE * Math.PI / 180));
        int cY = (int) (centerY + currentRadius1 * Math.sin(i * OUTER_DOTS_POSITION_ANGLE * Math.PI / 180));
        canvas.drawCircle(cX, cY, currentDotSize1, circlePaints[i % circlePaints.length]);
    }
}

private void drawInnerDotsFrame(Canvas canvas) {
    for (int i = 0; i < DOTS_COUNT; i++) {
        int cX = (int) (centerX + currentRadius2 * Math.cos((i * OUTER_DOTS_POSITION_ANGLE - 10) * Math.PI / 180));
        int cY = (int) (centerY + currentRadius2 * Math.sin((i * OUTER_DOTS_POSITION_ANGLE - 10) * Math.PI / 180));
        canvas.drawCircle(cX, cY, currentDotSize2, circlePaints[(i + 1) % circlePaints.length]);
    }
}

圆点是基于currentProgress绘制的，背后是数学逻辑，老实说从安卓sdk的角度来看这里没有什么有趣的地方，倒是有两个跟数学相关的东西：

圆点分布在一个圆上－它们的位置决定于:

int cX = (int) (centerX + currentRadius1 * Math.cos(i * OUTER_DOTS_POSITION_ANGLE * Math.PI / 180));

int cY = (int) (centerY + currentRadius1 * Math.sin(i * OUTER_DOTS_POSITION_ANGLE * Math.PI / 180));

意味着：在每个 OUTER_DOTS_POSITION_ANGLE 上设置圆点 (51 度).

每个圆点都有它自己的颜色动画：

private void updateDotsPaints() {
    if (currentProgress < 0.5f) {
        float progress = (float) Utils.mapValueFromRangeToRange(currentProgress, 0f, 0.5f, 0, 1f);
        circlePaints[0].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_1, COLOR_2));
        circlePaints[1].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_2, COLOR_3));
        circlePaints[2].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_3, COLOR_4));
        circlePaints[3].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_4, COLOR_1));
    } else {
        float progress = (float) Utils.mapValueFromRangeToRange(currentProgress, 0.5f, 1f, 0, 1f);
        circlePaints[0].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_2, COLOR_3));
        circlePaints[1].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_3, COLOR_4));
        circlePaints[2].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_4, COLOR_1));
        circlePaints[3].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_1, COLOR_2));
    }
}

这意味着圆点颜色在3个区间形式的值之间动画。我们再一次使用ArgbEvaluator 让它平滑。其余就很简单了
CircleView完整代码

package com.loveta.umengexample;

import android.animation.ArgbEvaluator;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.util.AttributeSet;
import android.util.Log;
import android.util.Property;
import android.view.View;

/**
 * Created by Miroslaw Stanek on 21.12.2015.
 */
public class CircleView extends View {
    private static final int START_COLOR = 0xFFFF5722;
    private static final int END_COLOR = 0xFFFFC107;

    private ArgbEvaluator argbEvaluator = new ArgbEvaluator();

    private Paint circlePaint = new Paint();
    private Paint maskPaint = new Paint();

    private Bitmap tempBitmap;
    private Canvas tempCanvas;

    private float outerCircleRadiusProgress = 0f;
    private float innerCircleRadiusProgress = 0f;

    private int maxCircleSize;

    public CircleView(Context context) {
        super(context);
        init();
    }

    public CircleView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public CircleView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    public CircleView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        init();
    }

    private void init() {
//        Log.e("==tjj", "============");
        circlePaint.setStyle(Paint.Style.FILL);//实心园
        maskPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
        //PorterDuff.Mode.CLEAR---所绘制不会提交到画布上。http://blog.csdn.net/edisonlg/article/details/7084977
    }
    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        maxCircleSize = w / 2;
        tempBitmap = Bitmap.createBitmap(getWidth(), getWidth(), Bitmap.Config.ARGB_8888);
        tempCanvas = new Canvas(tempBitmap);
    }

    @Override
    protected void onDraw(Canvas canvas) {//视图负责绘制星星图标下面的大圆
        super.onDraw(canvas);
        Log.e("==========tan111===", "tan111");
        tempCanvas.drawColor(0xffffff, PorterDuff.Mode.CLEAR);//设置画布的背景颜色
        tempCanvas.drawCircle(getWidth() / 2, getHeight() / 2, outerCircleRadiusProgress * maxCircleSize, circlePaint);
        tempCanvas.drawCircle(getWidth() / 2, getHeight() / 2, innerCircleRadiusProgress * maxCircleSize, maskPaint);
        canvas.drawBitmap(tempBitmap, 0, 0, null);
    }

    public void setInnerCircleRadiusProgress(float innerCircleRadiusProgress) {
        this.innerCircleRadiusProgress = innerCircleRadiusProgress;
//        Log.e("==========tan===", "tan");
        postInvalidate();
//        invalidate();
    }

    public float getInnerCircleRadiusProgress() {
        return innerCircleRadiusProgress;
    }

    public void setOuterCircleRadiusProgress(float outerCircleRadiusProgress) {
        this.outerCircleRadiusProgress = outerCircleRadiusProgress;
        updateCircleColor();
        postInvalidate();
//        invalidate();
    }

    private void updateCircleColor() {
        float colorProgress = (float) Utils.clamp(outerCircleRadiusProgress, 0.5, 1);
        colorProgress = (float) Utils.mapValueFromRangeToRange(colorProgress, 0.5f, 1f, 0f, 1f);
        this.circlePaint.setColor((Integer) argbEvaluator.evaluate(colorProgress, START_COLOR, END_COLOR));
    }

    public float getOuterCircleRadiusProgress() {
        return outerCircleRadiusProgress;
    }

    public static final Property<CircleView, Float> INNER_CIRCLE_RADIUS_PROGRESS =
            new Property<CircleView, Float>(Float.class, "innerCircleRadiusProgress") {
                @Override
                public Float get(CircleView object) {
                    return object.getInnerCircleRadiusProgress();
                }

                @Override
                public void set(CircleView object, Float value) {
//                    Log.e("==================tjj===","INNER_CIRCLE_RADIUS_PROGRESS");
                    object.setInnerCircleRadiusProgress(value);
                }
            };

    public static final Property<CircleView, Float> OUTER_CIRCLE_RADIUS_PROGRESS =
            new Property<CircleView, Float>(Float.class, "outerCircleRadiusProgress") {
                @Override
                public Float get(CircleView object) {
                    return object.getOuterCircleRadiusProgress();
                }

                @Override
                public void set(CircleView object, Float value) {
                    object.setOuterCircleRadiusProgress(value);
                }
            };
}

DotsView完整代码

package com.loveta.umengexample;

import android.animation.ArgbEvaluator;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.Log;
import android.util.Property;
import android.view.View;

/**
 * Created by Miroslaw Stanek on 20.12.2015.
 */
public class DotsView extends View {
    private static final int DOTS_COUNT = 7;
    private static final int OUTER_DOTS_POSITION_ANGLE = 360 / DOTS_COUNT;

    private static final int COLOR_1 = 0xFFFFC107;
    private static final int COLOR_2 = 0xFFFF9800;
    private static final int COLOR_3 = 0xFFFF5722;
    private static final int COLOR_4 = 0xFFF44336;

    private final Paint[] circlePaints = new Paint[4];

    private int centerX;
    private int centerY;

    private float maxOuterDotsRadius;
    private float maxInnerDotsRadius;
    private float maxDotSize;

    private float currentProgress = 0;

    private float currentRadius1 = 0;
    private float currentDotSize1 = 0;

    private float currentDotSize2 = 0;
    private float currentRadius2 = 0;

    private ArgbEvaluator argbEvaluator = new ArgbEvaluator();

    public DotsView(Context context) {
        super(context);
        init();
    }

    public DotsView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public DotsView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    public DotsView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        init();
    }


    private void init() {
        for (int i = 0; i < circlePaints.length; i++) {
            circlePaints[i] = new Paint();
            circlePaints[i].setStyle(Paint.Style.FILL);
        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        centerX = w / 2;
        centerY = h / 2;
        maxDotSize = 20;
        maxOuterDotsRadius = w / 2 - maxDotSize * 2;
        maxInnerDotsRadius = 0.8f * maxOuterDotsRadius;
    }

    @Override
    protected void onDraw(Canvas canvas) {//绘制浮动在星星图标周围的圆点
        drawOuterDotsFrame(canvas);
        drawInnerDotsFrame(canvas);
    }

    private void drawOuterDotsFrame(Canvas canvas) {
        for (int i = 0; i < DOTS_COUNT; i++) {
            int cX = (int) (centerX + currentRadius1 * Math.cos(i * OUTER_DOTS_POSITION_ANGLE * Math.PI / 180));
            int cY = (int) (centerY + currentRadius1 * Math.sin(i * OUTER_DOTS_POSITION_ANGLE * Math.PI / 180));
            canvas.drawCircle(cX, cY, currentDotSize1, circlePaints[i % circlePaints.length]);
        }
    }

    private void drawInnerDotsFrame(Canvas canvas) {
        for (int i = 0; i < DOTS_COUNT; i++) {
            int cX = (int) (centerX + currentRadius2 * Math.cos((i * OUTER_DOTS_POSITION_ANGLE - 10) * Math.PI / 180));
            int cY = (int) (centerY + currentRadius2 * Math.sin((i * OUTER_DOTS_POSITION_ANGLE - 10) * Math.PI / 180));
            canvas.drawCircle(cX, cY, currentDotSize2, circlePaints[(i + 1) % circlePaints.length]);
        }
    }

    public void setCurrentProgress(float currentProgress) {
        this.currentProgress = currentProgress;
        updateInnerDotsPosition();//1
        updateOuterDotsPosition();//2
        updateDotsPaints();//3
        updateDotsAlpha();//4

        postInvalidate();//1
    }

    public float getCurrentProgress() {
        return currentProgress;
    }

    private void updateInnerDotsPosition() {
        if (currentProgress < 0.3f) {
            this.currentRadius2 = (float) Utils.mapValueFromRangeToRange(currentProgress, 0, 0.3f, 0.f, maxInnerDotsRadius);
        } else {
            this.currentRadius2 = maxInnerDotsRadius;
        }

        if (currentProgress < 0.2) {
            this.currentDotSize2 = maxDotSize;
        } else if (currentProgress < 0.5) {
            this.currentDotSize2 = (float) Utils.mapValueFromRangeToRange(currentProgress, 0.2f, 0.5f, maxDotSize, 0.3 * maxDotSize);
        } else {
            this.currentDotSize2 = (float) Utils.mapValueFromRangeToRange(currentProgress, 0.5f, 1f, maxDotSize * 0.3f, 0);
        }

    }

    private void updateOuterDotsPosition() {
        if (currentProgress < 0.3f) {
            this.currentRadius1 = (float) Utils.mapValueFromRangeToRange(currentProgress, 0.0f, 0.3f, 0, maxOuterDotsRadius * 0.8f);
        } else {
            this.currentRadius1 = (float) Utils.mapValueFromRangeToRange(currentProgress, 0.3f, 1f, 0.8f * maxOuterDotsRadius, maxOuterDotsRadius);
        }

        if (currentProgress < 0.7) {
            this.currentDotSize1 = maxDotSize;
        } else {
            this.currentDotSize1 = (float) Utils.mapValueFromRangeToRange(currentProgress, 0.7f, 1f, maxDotSize, 0);
        }
    }

    private void updateDotsPaints() {
        if (currentProgress < 0.5f) {
            float progress = (float) Utils.mapValueFromRangeToRange(currentProgress, 0f, 0.5f, 0, 1f);
            circlePaints[0].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_1, COLOR_2));
            circlePaints[1].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_2, COLOR_3));
            circlePaints[2].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_3, COLOR_4));
            circlePaints[3].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_4, COLOR_1));
        } else {
            float progress = (float) Utils.mapValueFromRangeToRange(currentProgress, 0.5f, 1f, 0, 1f);
            circlePaints[0].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_2, COLOR_3));
            circlePaints[1].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_3, COLOR_4));
            circlePaints[2].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_4, COLOR_1));
            circlePaints[3].setColor((Integer) argbEvaluator.evaluate(progress, COLOR_1, COLOR_2));
        }
    }

    private void updateDotsAlpha() {
        float progress = (float) Utils.clamp(currentProgress, 0.6f, 1f);
        int alpha = (int) Utils.mapValueFromRangeToRange(progress, 0.6f, 1f, 255, 0);
        circlePaints[0].setAlpha(alpha);
        circlePaints[1].setAlpha(alpha);
        circlePaints[2].setAlpha(alpha);
        circlePaints[3].setAlpha(alpha);
    }

    public static final Property<DotsView, Float> DOTS_PROGRESS = new Property<DotsView, Float>(Float.class, "dotsProgress") {
        @Override
        public Float get(DotsView object) {
            return object.getCurrentProgress();
        }

        @Override
        public void set(DotsView object, Float value) {

            object.setCurrentProgress(value);
        }
    };
}

四：LikeButtonView

最终的ViewGroup是由CircleView, ImageView 以及DotsView组成的。

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="match_parent">

    <frogermcs.io.likeanimation.DotsView
        android:id="@+id/vDotsView"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_gravity="center"/>

    <frogermcs.io.likeanimation.CircleView
        android:id="@+id/vCircle"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_gravity="center"/>

    <ImageView
        android:id="@+id/ivStar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:src="@drawable/ic_star_rate_off"/>

</merge>

我们使用 Merge 标签帮助消除多余的ViewGroup。LikeButtonView本身就是一个FrameLayout，因此没有必要出现两次。

我们最终的动画是由更小的动画组成的，通过AnimatorSet一起播放：
LikeButtonView完整代码

package com.loveta.umengexample;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.OvershootInterpolator;
import android.widget.FrameLayout;
import android.widget.ImageView;

import butterknife.Bind;
import butterknife.ButterKnife;

/**
 * Created by Miroslaw Stanek on 20.12.2015.
 */
public class LikeButtonView extends FrameLayout implements View.OnClickListener {
    private static final DecelerateInterpolator DECCELERATE_INTERPOLATOR = new DecelerateInterpolator();
    private static final AccelerateDecelerateInterpolator ACCELERATE_DECELERATE_INTERPOLATOR = new AccelerateDecelerateInterpolator();
    private static final OvershootInterpolator OVERSHOOT_INTERPOLATOR = new OvershootInterpolator(4);

    @Bind(R.id.ivStar)
    ImageView ivStar;
    @Bind(R.id.vDotsView)
    DotsView vDotsView;
    @Bind(R.id.vCircle)
    CircleView vCircle;

    private boolean isChecked;
    private AnimatorSet animatorSet;

    public LikeButtonView(Context context) {
        super(context);
        init();
    }

    public LikeButtonView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public LikeButtonView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public LikeButtonView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        init();
    }
    private void init() {
        LayoutInflater.from(getContext()).inflate(R.layout.view_like_button, this, true);
        ButterKnife.bind(this);
        setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
//        Log.e("==tjj======",v.getId()+"");
        isChecked = !isChecked;
        ivStar.setImageResource(isChecked ? R.drawable.smart11 : R.drawable.smart1);

        if (animatorSet != null) {
            animatorSet.cancel();
        }

        if (isChecked) {
            ivStar.animate().cancel();
            ivStar.setScaleX(0);
            ivStar.setScaleY(0);
            Log.e("====1111=======", "setCurrentProgress");
            vCircle.setInnerCircleRadiusProgress(0);
            vCircle.setOuterCircleRadiusProgress(0);

            vDotsView.setCurrentProgress(0);

            animatorSet = new AnimatorSet();

            ObjectAnimator outerCircleAnimator = ObjectAnimator.ofFloat(vCircle, CircleView.OUTER_CIRCLE_RADIUS_PROGRESS, 0.1f, 1f);
            outerCircleAnimator.setDuration(250);
            outerCircleAnimator.setInterpolator(DECCELERATE_INTERPOLATOR);

            ObjectAnimator innerCircleAnimator = ObjectAnimator.ofFloat(vCircle, CircleView.INNER_CIRCLE_RADIUS_PROGRESS, 0.1f, 1f);
            innerCircleAnimator.setDuration(200);
            innerCircleAnimator.setStartDelay(200);
            innerCircleAnimator.setInterpolator(DECCELERATE_INTERPOLATOR);

            ObjectAnimator starScaleYAnimator = ObjectAnimator.ofFloat(ivStar, ImageView.SCALE_Y, 0.2f, 1f);
            starScaleYAnimator.setDuration(350);
            starScaleYAnimator.setStartDelay(250);
            starScaleYAnimator.setInterpolator(OVERSHOOT_INTERPOLATOR);

            ObjectAnimator starScaleXAnimator = ObjectAnimator.ofFloat(ivStar, ImageView.SCALE_X, 0.2f, 1f);
            starScaleXAnimator.setDuration(350);
            starScaleXAnimator.setStartDelay(250);
            starScaleXAnimator.setInterpolator(OVERSHOOT_INTERPOLATOR);

            ObjectAnimator dotsAnimator = ObjectAnimator.ofFloat(vDotsView, DotsView.DOTS_PROGRESS, 0, 1f);
            dotsAnimator.setDuration(900);
            dotsAnimator.setStartDelay(50);
            dotsAnimator.setInterpolator(ACCELERATE_DECELERATE_INTERPOLATOR);


            animatorSet.playTogether(
                    outerCircleAnimator,
                    innerCircleAnimator,
                    starScaleYAnimator,
                    starScaleXAnimator,
                    dotsAnimator
            );

            animatorSet.addListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationCancel(Animator animation) {
                    vCircle.setInnerCircleRadiusProgress(0);
                    vCircle.setOuterCircleRadiusProgress(0);
//                    Log.e("====2222=======", "setCurrentProgress");
                    vDotsView.setCurrentProgress(0);
                    ivStar.setScaleX(1);
                    ivStar.setScaleY(1);
                }
            });

            animatorSet.start();
        }
    }

//LikeButtonView还会响应触摸事件（缩放动画）：
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                ivStar.animate().scaleX(0.7f).scaleY(0.7f).setDuration(150).setInterpolator(DECCELERATE_INTERPOLATOR);
                setPressed(true);
                break;

            case MotionEvent.ACTION_MOVE:
                float x = event.getX();
                float y = event.getY();
                boolean isInside = (x > 0 && x < getWidth() && y > 0 && y < getHeight());
                if (isPressed() != isInside) {
                    setPressed(isInside);
                }
                break;

            case MotionEvent.ACTION_UP:
                ivStar.animate().scaleX(1).scaleY(1).setInterpolator(DECCELERATE_INTERPOLATOR);
                if (isPressed()) {
                    performClick();
                    setPressed(false);
                }
                break;
        }
        return true;
    }


}

源代码可以在github上面得到：https://github.com/frogermcs/LikeAnimation/

Twitter的like动画安卓版 - 备选方案

一：实现

CircleView

三：DotsView

四：LikeButtonView

Twitter的like動畫安卓版 - 備選方案

Git查看某一天的詳細修改日誌

Google 開發者

去除Activity直接無限跳轉問題

圖片添加濾鏡效果，99中效果

https://yachay.unat.edu.pe/blog/index.php?comment_area=format_blog&comment_component=blog&comment_co

linux以太網驅動總結