注意事项

卫星式菜单参考：https://www.cnblogs.com/tianhengblogs/p/5265195.html

接下来是音乐播放器步骤：

在工程文件夹“ ..\app\src\main\res ”下，新建一个文件夹“raw”，然后把音乐放进去，命名为“ lucky.mp3 ” ；
在工程文件夹 “ ..\app\src\main\res\drawable ”下，放入你喜欢的图片作为播放器背景，命名为“bg1”；以及4个控制按钮(尺寸：34*30)，分别命名为 “exit”，“stop”，“play”，“pause”，和菜单按钮(尺寸：45*42) “menu” ；
在工程文件夹 “ ..\app\src\main\res\mipmap-hdpi ”下，放入歌手海报，命名为“img”。由于要制作旋转效果，故推荐选择圆形的图片；
在工程文件夹“ ..\app\src\main\res ”下，新建一个文件夹“anim”，在里面新建3个xml文档，命名为“anim.xml”，“bigalpha.xml”，“smallalpha.xml”；
“ AndroidManifest.xml ”里，在</activity>后加一句<service android:name=".MusicService" android:enabled="true" android:exported="true" />

在工程文件夹“ ..\app\src\main\res\values ”下，新建xml文档，命名为“dimens.xml”；找到styles.xml文件，把

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

改为

<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">

预览图

源码

anim.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"><rotateandroid:duration="300"android:fromDegrees="0"android:toDegrees="360"android:pivotX="50%"android:pivotY="50%"/>
</set>

bigalpha.xml

<?xml version="1.0" encoding="utf-8"?>
<!--android:fillAfter="true"得加，取动画结束后的最后一帧-->
<set xmlns:android="http://schemas.android.com/apk/res/android"android:fillAfter="true"><alphaandroid:duration="200"android:fromAlpha="1"android:toAlpha="0"/><scaleandroid:duration="200"android:fromXScale="1"android:fromYScale="1"android:toXScale="3"android:toYScale="3"android:pivotX="50%"android:pivotY="50%" />
</set>

smallalpha.xml

<?xml version="1.0" encoding="utf-8"?>
<!--android:fillAfter="true"得加，取动画结束后的最后一帧-->
<set xmlns:android="http://schemas.android.com/apk/res/android"android:fillAfter="true"><alphaandroid:duration="200"android:fromAlpha="1"android:toAlpha="0"/><scaleandroid:duration="200"android:fromXScale="1"android:fromYScale="1"android:toXScale="0"android:toYScale="0"android:pivotX="50%"android:pivotY="50%" />
</set>

dimens.xml

<resources><!-- Default screen margins, per the Android Design guidelines. --><dimen name="activity_horizontal_margin">16dp</dimen><dimen name="activity_vertical_margin">16dp</dimen>
</resources>

MainActivity.java

1package com.example.slyarh.text;import android.animation.ObjectAnimator;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.animation.LinearInterpolator;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;import java.text.SimpleDateFormat;public class MainActivity extends AppCompatActivity {private TextView musicStatus, musicTime, musicTotal;private SeekBar seekBar;private ImageView btnPlayOrPause, btnStop, btnQuit;private SimpleDateFormat time = new SimpleDateFormat("mm:ss");private boolean tag1 = false;private boolean tag2 = false;private MusicService musicService;private ArcDemo mArc;//  在Activity中调用 bindService 保持与 Service 的通信private void bindServiceConnection() {Intent intent = new Intent(MainActivity.this, MusicService.class);startService(intent);bindService(intent, serviceConnection, this.BIND_AUTO_CREATE);}//  回调onServiceConnected 函数，通过IBinder 获取 Service对象，实现Activity与 Service的绑定private ServiceConnection serviceConnection = new ServiceConnection() {@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {musicService = ((MusicService.MyBinder) (service)).getService();Log.i("musicService", musicService + "");musicTotal.setText(time.format(musicService.mediaPlayer.getDuration()));}@Overridepublic void onServiceDisconnected(ComponentName name) {musicService = null;}};//  通过 Handler 更新 UI 上的组件状态public Handler handler = new Handler();public Runnable runnable = new Runnable() {@Overridepublic void run() {musicTime.setText(time.format(musicService.mediaPlayer.getCurrentPosition()));seekBar.setProgress(musicService.mediaPlayer.getCurrentPosition());seekBar.setMax(musicService.mediaPlayer.getDuration());musicTotal.setText(time.format(musicService.mediaPlayer.getDuration()));handler.postDelayed(runnable, 200);}};private void findViewById() {musicTime = (TextView) findViewById(R.id.MusicTime);musicTotal = (TextView) findViewById(R.id.MusicTotal);seekBar = (SeekBar) findViewById(R.id.MusicSeekBar);btnPlayOrPause = (ImageView) findViewById(R.id.BtnPlayorPause);btnStop = (ImageView) findViewById(R.id.BtnStop);btnQuit = (ImageView) findViewById(R.id.BtnQuit);musicStatus = (TextView) findViewById(R.id.MusicStatus);}@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);findViewById();bindServiceConnection();//myListener();ImageView imageView = (ImageView) findViewById(R.id.Image);final ObjectAnimator animator = ObjectAnimator.ofFloat(imageView, "rotation", 0f, 360.0f);animator.setDuration(10000);animator.setInterpolator(new LinearInterpolator());animator.setRepeatCount(-1);seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {if (fromUser == true) {musicService.mediaPlayer.seekTo(progress);}}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {}});mArc = (ArcDemo) findViewById(R.id.view_arc);mArc.setOnSubItemClickListener(new ArcDemo.onSubItemClickListener() {@Overridepublic void onItemClick(View view, int position) {if(position==5){if (musicService.mediaPlayer != null) {seekBar.setProgress(musicService.mediaPlayer.getCurrentPosition());seekBar.setMax(musicService.mediaPlayer.getDuration());}//  由tag的变换来控制事件的调用if (musicService.tag != true) {//btnPlayOrPause.setText("PAUSE");musicStatus.setText("正在播放..");musicService.playOrPause();musicService.tag = true;btnPlayOrPause.setImageDrawable(getResources().getDrawable(R.drawable.pause));if (tag1 == false) {animator.start();tag1 = true;}else {animator.resume();}}else {//btnPlayOrPause.setText("PLAY");musicStatus.setText("暂停播放..");musicService.playOrPause();animator.pause();btnPlayOrPause.setImageDrawable(getResources().getDrawable(R.drawable.play));musicService.tag = false;}if (tag2 == false) {handler.post(runnable);tag2 = true;}}else if(position==6){musicStatus.setText("停止播放..");//  btnPlayOrPause.setText("PLAY");musicService.stop();btnPlayOrPause.setImageDrawable(getResources().getDrawable(R.drawable.play));animator.pause();musicService.tag = false;}else if(position==7) exit();}});}// 停止服务时，必须解除绑定，写入btnQuit按钮中public void exit(){handler.removeCallbacks(runnable);unbindService(serviceConnection);Intent intent = new Intent(MainActivity.this, MusicService.class);stopService(intent);try {MainActivity.this.finish();} catch (Exception e) {}}//  获取并设置返回键的点击事件@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {if (keyCode == KeyEvent.KEYCODE_BACK) {moveTaskToBack(false);return true;}return super.onKeyDown(keyCode, event);}
}

activity_main.xml

1<?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"><LinearLayoutandroid:layout_width="wrap_content"android:background="@drawable/bg1"android:layout_height="wrap_content"android:layout_gravity="center"android:gravity="center"android:orientation="vertical"><LinearLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:background="#00000000"android:paddingBottom="16dp"android:paddingLeft="16dp"android:paddingRight="16dp"android:paddingTop="16dp"><ImageViewandroid:id="@+id/Image"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center"android:src="@mipmap/img" /><!--显示歌曲状态--><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text=""android:id="@+id/MusicStatus"/><RelativeLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:layout_gravity="center"android:layout_margin="5dp"android:gravity="center_horizontal"><!--显示当前进度--><TextViewandroid:id="@+id/MusicTime"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="00:00" /><SeekBarandroid:layout_width="230sp"android:layout_height="wrap_content"android:id="@+id/MusicSeekBar"android:layout_weight="1"android:max="100"android:layout_toRightOf="@+id/MusicTime"/><!--显示总进度--><TextViewandroid:id="@+id/MusicTotal"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="00:00"android:layout_toRightOf="@+id/MusicSeekBar"/></RelativeLayout></LinearLayout><RelativeLayoutandroid:layout_width="match_parent"android:background="#00000000"android:layout_height="match_parent"><com.example.slyarh.text.ArcDemoandroid:background="#00000000"android:id="@+id/view_arc"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentLeft="true"android:layout_alignParentStart="true"android:layout_alignParentTop="true"><RelativeLayoutandroid:id="@+id/main_menu"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@drawable/menu"></RelativeLayout><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"/><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"/><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"/><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"/><ImageViewandroid:id="@+id/BtnPlayorPause"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/play" /><ImageViewandroid:id="@+id/BtnStop"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/stop" /><ImageViewandroid:id="@+id/BtnQuit"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@drawable/exit" /></com.example.slyarh.text.ArcDemo></RelativeLayout></LinearLayout>
</FrameLayout>

MusicService.java

1package com.example.slyarh.text;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Binder;
import android.os.IBinder;public class MusicService extends Service {public MediaPlayer mediaPlayer=null;public boolean tag = false;public MusicService() {mediaPlayer = new MediaPlayer();try {mediaPlayer.reset();mediaPlayer = MediaPlayer.create(this, R.raw.lucky);mediaPlayer.seekTo(0);mediaPlayer.setLooping(true);stop();} catch (Exception e) {e.printStackTrace();}}//  通过 Binder 来保持 Activity 和 Service 的通信public MyBinder binder = new MyBinder();public class MyBinder extends Binder {MusicService getService() {return MusicService.this;}}public void playOrPause() {if (mediaPlayer.isPlaying()) {mediaPlayer.setLooping(true);mediaPlayer.pause();} else {mediaPlayer.setLooping(true);mediaPlayer.start();}}public void stop() {if (mediaPlayer != null) {mediaPlayer.stop();mediaPlayer.setLooping(true);try {mediaPlayer.reset();mediaPlayer = MediaPlayer.create(this, R.raw.lucky);mediaPlayer.seekTo(0);mediaPlayer.setLooping(true);} catch (Exception e) {e.printStackTrace();}}}@Overridepublic boolean onUnbind(Intent intent) {return super.onUnbind(intent);}@Overridepublic IBinder onBind(Intent intent) {return binder;}
}

ArcDemo.java

package com.example.slyarh.text;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.AnimationUtils;
import android.view.animation.RotateAnimation;
import android.view.animation.TranslateAnimation;public class ArcDemo extends ViewGroup {private View mButton;private BStatus mBStatus = BStatus.STATUS_CLOSE;private onSubItemClickListener onListener;public enum BStatus {STATUS_OPEN, STATUS_CLOSE}//子菜单点击接口public interface onSubItemClickListener {void onItemClick(View view, int position);}public void setOnSubItemClickListener(onSubItemClickListener mListener) {this.onListener = mListener;}public ArcDemo(Context context) {super(context);
//        this(context, null);}public ArcDemo(Context context, AttributeSet attrs) {super(context, attrs);
//        this(context, attrs, 0);}public ArcDemo(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int count = getChildCount();for (int i = 0; i < count; i++) {measureChild(getChildAt(i), widthMeasureSpec, heightMeasureSpec);}super.onMeasure(widthMeasureSpec, heightMeasureSpec);}//添加布局，就是所要显示的控件View@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {if (changed) {//主菜单按钮onMainButton();//子菜单按钮onSubItemButton();}}//获取主菜单按钮private void onMainButton() {mButton = getChildAt(0);mButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {//主菜单动画Animation rotateAnim = AnimationUtils.loadAnimation(getContext(), R.anim.anim);mButton.startAnimation(rotateAnim);//子菜单动画subItemAnim();}});int l, t, r = 0, b = 0;int mWidth = mButton.getMeasuredWidth();int mHeight = mButton.getMeasuredHeight();l = getMeasuredWidth() - mWidth;t = getMeasuredHeight() - mHeight;mButton.layout(l, t, getMeasuredWidth(), getMeasuredHeight());}//获取子菜单按钮private void onSubItemButton() {int count = getChildCount();for (int i = 0; i < count - 1; i++) {View childView = getChildAt(i + 1);//开始时不呈现子菜单childView.setVisibility(View.GONE);int radius = 350;int cl, ct, cr, cb;cr = (int) (radius * Math.sin(Math.PI / 2 / (count - 2) * i));cb = (int) (radius * Math.cos(Math.PI / 2 / (count - 2) * i));int cWidth = childView.getMeasuredWidth();int cHeight = childView.getMeasuredHeight();cl = getMeasuredWidth() - cWidth - cr;ct = getMeasuredHeight() - cHeight - cb;//layout(l,t,r,b);前两参数决定位置，后两参数决定大小//参数(1,t)为View控件的左上角坐标// (r-l,b-t)为View控件大小,r-l为控件宽度,b-t为控件高度childView.layout(cl, ct, getMeasuredWidth() - cr, getMeasuredHeight() - cb);}}//子菜单散开回笼动画public void subItemAnim() {int count = getChildCount();for (int i = 0; i < count - 1; i++) {final View cView = getChildAt(i + 1);//点击主菜单后，子菜单就立刻呈现，否则后面的动画无法完成cView.setVisibility(VISIBLE);int radius = 350;int l, t, r, d;r = (int) (radius * Math.sin(Math.PI / 2 / (count - 2) * i));d = (int) (radius * Math.cos(Math.PI / 2 / (count - 2) * i));//            int cWidth = cView.getMeasuredWidth();
//            int cHeight = cView.getMeasuredHeight();
//
//            l = getMeasuredWidth() - cWidth - r;
//            t = getMeasuredHeight() - cHeight - d;AnimationSet set = new AnimationSet(true);Animation tranAnim = null;if (mBStatus == BStatus.STATUS_CLOSE) {//散开动画tranAnim = new TranslateAnimation(r, 0, d, 0);cView.setClickable(true);cView.setFocusable(true);} else {//回笼动画tranAnim = new TranslateAnimation(0, r, 0, d);cView.setClickable(false);cView.setFocusable(false);}tranAnim.setDuration(300);
//            tranAnim.setFillAfter(true);  //让最后一帧的动画不消失tranAnim.setStartOffset(100 * i / count);tranAnim.setAnimationListener(new Animation.AnimationListener() {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic void onAnimationEnd(Animation animation) {if (mBStatus == BStatus.STATUS_CLOSE) {cView.setVisibility(GONE);}}@Overridepublic void onAnimationRepeat(Animation animation) {}});Animation rotateAnim = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);rotateAnim.setDuration(300);
//            rotateAnim.setFillAfter(false);set.addAnimation(rotateAnim);set.addAnimation(tranAnim);cView.startAnimation(set);//散开后子菜单的点击监听事件final int pos = i + 1;cView.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if (onListener != null) {onListener.onItemClick(cView, pos);}//散开后点击子菜单动画subItemClickAnim(pos - 1);changStatus();}});}changStatus();}//监听子菜单状态改变private void changStatus() {mBStatus = (mBStatus == BStatus.STATUS_CLOSE ? BStatus.STATUS_OPEN : BStatus.STATUS_CLOSE);}//散开后点击子菜单动画private void subItemClickAnim(int pos) {int count = getChildCount();for (int i = 0;i<count-1;i++) {View cView = getChildAt(i+1);if(i == pos) {//变大，变透明cView.startAnimation(toBig());}else {//变小，变透明cView.startAnimation(toSmall());}cView.setClickable(false);cView.setFocusable(false);}}//变大，变透明private Animation toBig(){Animation big = AnimationUtils.loadAnimation(getContext(),R.anim.bigalpha);return big;}//变小，变透明private Animation toSmall(){Animation small = AnimationUtils.loadAnimation(getContext(),R.anim.smallalpha);return small;}//给ListView调用public boolean isOpen() {return mBStatus == BStatus.STATUS_OPEN;}}

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简易音乐播放器（Android Studio）

注意事项

预览图

源码

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