Android仿网易云音乐转盘的实现

做一个音乐类APP的过程中，遇到一个实现类似网易云音乐转盘转动的界面，作为一款比较喜欢的音乐播放器，自然兴趣十足，希望可以学到一分吧。
主要用ObjectAnimator实现，代码量也很少，下面直接贴出来吧

先贴出效果图吧

MainActivity

public class MainActivity extends AppCompatActivity implements View.OnClickListener{
    private ImageView disc,needle,playingPre,playingPlay,playingNext;
    private ObjectAnimator discAnimation,needleAnimation;
    private boolean isPlaying = true;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initViews();
        setAnimations();
    }

    private void initViews() {
        playingPre = (ImageView) findViewById(R.id.playing_pre);
        playingPlay = (ImageView) findViewById(R.id.playing_play);
        playingNext = (ImageView) findViewById(R.id.playing_next);
        disc = (ImageView) findViewById(R.id.disc);
        needle = (ImageView) findViewById(R.id.needle);
        playingPre.setOnClickListener(this);
        playingPlay.setOnClickListener(this);
        playingNext.setOnClickListener(this);
    }

    //动画设置
    private void setAnimations() {

        discAnimation = ObjectAnimator.ofFloat(disc, "rotation", 0, 360);
        discAnimation.setDuration(20000);
        discAnimation.setInterpolator(new LinearInterpolator());
        discAnimation.setRepeatCount(ValueAnimator.INFINITE);

        needleAnimation = ObjectAnimator.ofFloat(needle, "rotation", 0, 25);
        needle.setPivotX(0);
        needle.setPivotY(0);
        needleAnimation.setDuration(800);
        needleAnimation.setInterpolator(new LinearInterpolator());
    }

    @Override
    public void onClick(View v) {
        int id = v.getId();
        switch (id) {
            //前一曲
            case R.id.playing_pre:
                if (discAnimation != null) {
                    discAnimation.end();
                    playing();
                }
                break;
            //播放中
            case R.id.playing_play:
                if (isPlaying){
                    playing();
                }else {
                    if (needleAnimation != null) {
                        needleAnimation.reverse();
                        needleAnimation.end();
                    }
                    if (discAnimation != null && discAnimation.isRunning()) {
                        discAnimation.cancel();
                        float valueAvatar = (float) discAnimation.getAnimatedValue();
                        discAnimation.setFloatValues(valueAvatar, 360f + valueAvatar);
                    }
                    playingPlay.setImageResource(R.drawable.play_btn_play);
                    isPlaying = true;
                }
                break;
            //下一曲
            case R.id.playing_next:
                if (discAnimation != null) {
                    discAnimation.end();
                    playing();
                }
                break;
            default:
                break;
        }
    }

    //播放时动画设置和图片切换
    private void playing(){
        needleAnimation.start();
        discAnimation.start();
        playingPlay.setImageResource(R.drawable.play_btn_pause);
        isPlaying = false;
    }
}

xml文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/music_play_background"
    tools:context="com.peng.cp.easemusicdiscexample.MainActivity">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_alignParentBottom="true"
        android:orientation="horizontal">


        <ImageView
            android:id="@+id/playing_pre"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:src="@drawable/play_btn_prev" />

        <ImageView
            android:id="@+id/playing_play"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:src="@drawable/play_btn_play" />

        <ImageView
            android:id="@+id/playing_next"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:src="@drawable/play_btn_next" />

    </LinearLayout>

    <ImageView
        android:id="@+id/disc"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/play_album"
        android:layout_marginTop="50dp"
        android:layout_centerHorizontal="true" />

    <ImageView
        android:id="@+id/needle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/play_needle"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

</RelativeLayout>

当然源码我也上传了，用Android Studio2.2编译的
这里是地址：http://download.youkuaiyun.com/detail/u011710991/9644212
最后欢迎大家指正。