AnimatorSet学习示例代码

package com.loaderman.customviewdemo;

import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{
    private Button mMenuButton;
    private Button mItemButton1;
    private Button mItemButton2;
    private Button mItemButton3;
    private Button mItemButton4;
    private Button mItemButton5;
    private boolean mIsMenuOpen = false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initView();
    }

    private void initView() {
        mMenuButton = (Button) findViewById(R.id.menu);
        mMenuButton.setOnClickListener(this);

        mItemButton1 = (Button) findViewById(R.id.item1);
        mItemButton1.setOnClickListener(this);

        mItemButton2 = (Button) findViewById(R.id.item2);
        mItemButton2.setOnClickListener(this);

        mItemButton3 = (Button) findViewById(R.id.item3);
        mItemButton3.setOnClickListener(this);

        mItemButton4 = (Button) findViewById(R.id.item4);
        mItemButton4.setOnClickListener(this);

        mItemButton5 = (Button) findViewById(R.id.item5);
        mItemButton5.setOnClickListener(this);
    }

    public void onClick(View v) {
        if (!mIsMenuOpen) {
            mIsMenuOpen = true;
            openMenu();
        } else {
            Toast.makeText(this, "你点击了" + v, Toast.LENGTH_SHORT).show();
            mIsMenuOpen = false;
            closeMenu();
        }
    }

    private void openMenu() {
        doAnimateOpen(mItemButton1, 0, 5, 300);
        doAnimateOpen(mItemButton2, 1, 5, 300);
        doAnimateOpen(mItemButton3, 2, 5, 300);
        doAnimateOpen(mItemButton4, 3, 5, 300);
        doAnimateOpen(mItemButton5, 4, 5, 300);
    }

    private void closeMenu() {
        doAnimateClose(mItemButton1, 0, 5, 300);
        doAnimateClose(mItemButton2, 1, 5, 300);
        doAnimateClose(mItemButton3, 2, 5, 300);
        doAnimateClose(mItemButton4, 3, 5, 300);
        doAnimateClose(mItemButton5, 4, 5, 300);
    }

    /**
     * 打开菜单的动画
     *
     * @param view   执行动画的view
     * @param index  view在动画序列中的顺序,从0开始
     * @param total  动画序列的个数
     * @param radius 动画半径
     *               <p/>
     *               Math.sin(x):x -- 为number类型的弧度，角度乘以0.017(2π/360)可以转变为弧度
     */
    private void doAnimateOpen(View view, int index, int total, int radius) {
        if (view.getVisibility() != View.VISIBLE) {
            view.setVisibility(View.VISIBLE);
        }
        double degree = Math.toRadians(90) / (total - 1) * index;
        int translationX = -(int) (radius * Math.sin(degree));
        int translationY = -(int) (radius * Math.cos(degree));
        AnimatorSet set = new AnimatorSet();
        //包含平移、缩放和透明度动画
        set.playTogether(
                ObjectAnimator.ofFloat(view, "translationX", 0, translationX),
                ObjectAnimator.ofFloat(view, "translationY", 0, translationY),
                ObjectAnimator.ofFloat(view, "scaleX", 0f, 1f),
                ObjectAnimator.ofFloat(view, "scaleY", 0f, 1f),
                ObjectAnimator.ofFloat(view, "alpha", 0f, 1));
        //动画周期为500ms
        set.setDuration(500).start();
    }

    /**
     * 关闭菜单的动画
     *
     * @param view   执行动画的view
     * @param index  view在动画序列中的顺序
     * @param total  动画序列的个数
     * @param radius 动画半径
     */
    private void doAnimateClose(final View view, int index, int total,
                                int radius) {
        if (view.getVisibility() != View.VISIBLE) {
            view.setVisibility(View.VISIBLE);
        }
        double degree = Math.PI * index / ((total - 1) * 2);
        int translationX = -(int) (radius * Math.sin(degree));
        int translationY = -(int) (radius * Math.cos(degree));
        AnimatorSet set = new AnimatorSet();
        //包含平移、缩放和透明度动画
        set.playTogether(
                ObjectAnimator.ofFloat(view, "translationX", translationX, 0),
                ObjectAnimator.ofFloat(view, "translationY", translationY, 0),
                ObjectAnimator.ofFloat(view, "scaleX", 1f, 0.1f),
                ObjectAnimator.ofFloat(view, "scaleY", 1f, 0.1f),
                ObjectAnimator.ofFloat(view, "alpha", 1f, 0f));

        /**
         * 解决方案二
         */
//        set.addListener(new Animator.AnimatorListener() {
//            public void onAnimationStart(Animator animation) {
//
//            }
//            public void onAnimationEnd(Animator animation) {
//                view.setScaleX(1.0f);
//                view.setScaleY(1.0f);
//
//            }
//
//            public void onAnimationCancel(Animator animation) {
//
//            }
//            public void onAnimationRepeat(Animator animation) {
//
//            }
//        });
        set.setDuration(500).start();
    }
}

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginBottom="10dp"
    android:layout_marginRight="10dp">

    <Button
        android:id="@+id/menu"
        style="@style/MenuStyle"
        android:background="@drawable/menu"/>

    <Button
        android:id="@+id/item1"
        style="@style/MenuItemStyle"
        android:background="@drawable/circle1"
        android:visibility="gone"/>

    <Button
        android:id="@+id/item2"
        style="@style/MenuItemStyle"
        android:background="@drawable/circle2"
        android:visibility="gone"/>

    <Button
        android:id="@+id/item3"
        style="@style/MenuItemStyle"
        android:background="@drawable/circle3"
        android:visibility="gone"/>

    <Button
        android:id="@+id/item4"
        style="@style/MenuItemStyle"
        android:background="@drawable/circle4"
        android:visibility="gone"/>

    <Button
        android:id="@+id/item5"
        style="@style/MenuItemStyle"
        android:background="@drawable/circle5"
        android:visibility="gone"/>

</FrameLayout>

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

        <style name="MenuStyle">
            <item name="android:layout_width">50dp</item>
            <item name="android:layout_height">50dp</item>
            <item name="android:layout_gravity">right|bottom</item>
        </style>

        <style name="MenuItemStyle">
            <item name="android:layout_width">45dp</item>
            <item name="android:layout_height">45dp</item>
            <item name="android:layout_gravity">right|bottom</item>
        </style>

</resources>

效果:

---

package com.loaderman.customviewdemo;

import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private Button mButton;
    private TextView mTv1, mTv2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mButton = (Button) findViewById(R.id.btn);
        mTv1 = (TextView) findViewById(R.id.tv_1);
        mTv2 = (TextView) findViewById(R.id.tv_2);

        mButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                /**
                 * playSequentially  代表所有多动画依次播放
                 */
//                ObjectAnimator tv1BgAnimator = ObjectAnimator.ofInt(mTv1, "BackgroundColor", 0xffff00ff, 0xffffff00, 0xffff00ff);
//                ObjectAnimator tv1TranslateY = ObjectAnimator.ofFloat(mTv1, "translationY", 0, 300, 0);
//                ObjectAnimator tv2TranslateY = ObjectAnimator.ofFloat(mTv2, "translationY", 0, 400, 0);
//
//                AnimatorSet animatorSet = new AnimatorSet();
//                animatorSet.playSequentially(tv1BgAnimator, tv1TranslateY, tv2TranslateY);
//                animatorSet.setDuration(1000);
//                animatorSet.start();

                /**
                 * playTogether  代表所有动画一起播放
                 */
//                ObjectAnimator tv1BgAnimator = ObjectAnimator.ofInt(mTv1, "BackgroundColor", 0xffff00ff, 0xffffff00, 0xffff00ff);
//                ObjectAnimator tv1TranslateY = ObjectAnimator.ofFloat(mTv1, "translationY", 0, 400, 0);
//                ObjectAnimator tv2TranslateY = ObjectAnimator.ofFloat(mTv2, "translationY", 0, 400, 0);
//
//                AnimatorSet animatorSet = new AnimatorSet();
//                animatorSet.playTogether(tv1BgAnimator, tv1TranslateY, tv2TranslateY);
//                animatorSet.setDuration(1000);
//                animatorSet.start();

                /**
                 * 使用AnimatorSet.builder  可以自由组合动画，是playSequentially和playTogether的组合
                 */
                ObjectAnimator tv1BgAnimator = ObjectAnimator.ofInt(mTv1, "BackgroundColor", 0xffff00ff, 0xffffff00, 0xffff00ff);
                ObjectAnimator tv1TranslateY = ObjectAnimator.ofFloat(mTv1, "translationY", 0, 400, 0);
                ObjectAnimator tv2TranslateY = ObjectAnimator.ofFloat(mTv2, "translationY", 0, 400, 0);

                AnimatorSet animatorSet = new AnimatorSet();
                animatorSet.play(tv1TranslateY).with(tv2TranslateY).after(tv1BgAnimator);
                animatorSet.setDuration(2000);
                animatorSet.start();

            }
        });
    }

}

---

动画监听:

  private AnimatorSet doListenerAnimation() {
        ObjectAnimator tv1TranslateY = ObjectAnimator.ofFloat(mTv1, "translationY", 0, 400, 0);
        ObjectAnimator tv2TranslateY = ObjectAnimator.ofFloat(mTv2, "translationY", 0, 400, 0);
        tv2TranslateY.setRepeatCount(ValueAnimator.INFINITE);

        AnimatorSet animatorSet = new AnimatorSet();
        animatorSet.play(tv1TranslateY).with(tv2TranslateY);
        animatorSet.addListener(new Animator.AnimatorListener() {
            public void onAnimationStart(Animator animation) {
                Log.d(tag, "animator start");
            }

            public void onAnimationEnd(Animator animation) {
                Log.d(tag, "animator end");
            }

            public void onAnimationCancel(Animator animation) {
                Log.d(tag, "animator cancel");
            }

            public void onAnimationRepeat(Animator animation) {
                Log.d(tag, "animator repeat");
            }
        });
        animatorSet.setDuration(2000);
        animatorSet.start();
        return animatorSet;
    }

---