0910Android音乐播放器

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原理

实现功能

点击音乐列表中的音乐播放
暂停播放开始播放（包括暂停以后拖动进度条到其他位置再播放）
拖动音乐进度条，音乐从拖动结束位置播放
上一首下一首音乐

流程图

这里写图片描述　

原理　　

　　利用了mediaplayer，广播，服务，listView完成了整体任务。
　　在主函数中获得音乐地址，通过listView中的item点击事件打开服务，将音乐路径和名称传到服务中。然后在服务中打开音乐，将音乐的播放时间和音乐名称通过广播传到主线程中，开启服务中的线程将音乐的实时时间（耗时操作）传到主线程中。
　　在主线程中注册广播，新建广播接收器的实例。广播接收器通过发送广播时type类型来区别音乐的播放时间和音乐的实时时间，并依此设置textview和seekbar。
　　跳转功能通过在服务中MediaPlayer的seekTo来实现。
　　暂停播放设置点击事件，通过一个flag，使暂停和播放通过点击交替执行。设置点击具体功能也是在服务中进行，点一下MediaPlayer暂停pause(),再点一下start()。
　　音乐的上一首下一首，在主线程中控制，在服务中执行打开音乐的代码块。主线程中通过定义一个全局变量将listView中的position获取。在设置上下首音乐的点击事件中打开播放音乐的服务，并且通过position来设置播放音乐。

功能具体实现

主线程中注册广播，建立广播接收器实例。获得音乐，打开音乐适配器。

获得音乐

//        获得所有的歌曲        final File music = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC);        musics = music.listFiles();

打开音乐适配器

//          添加到listView中        final LayoutInflater inflater = getLayoutInflater();        MusicAdapter musicAdapter = new MusicAdapter(inflater, musics);        mListView.setAdapter(musicAdapter);

音乐适配器中获取歌曲的名字，作者，图片

  public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder vh=null;        if(convertView==null){            vh=new ViewHolder();            convertView=mInflater.inflate(R.layout.listview_item,null);            vh.musicName = (TextView) convertView.findViewById(R.id.textview_music_name);            vh.musicAuther = (TextView) convertView.findViewById(R.id.tv_music_auther);            vh.img= (ImageView) convertView.findViewById(R.id.img);            convertView.setTag(vh);        }        vh= (ViewHolder) convertView.getTag();//        设置音乐名称        vh.musicName.setText(musics[position].getName());//      获取作家        MediaMetadataRetriever mmr=new MediaMetadataRetriever();        mmr.setDataSource(musics[position].getAbsolutePath());        String auther=mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST);//        判断作者是否为空        if(auther!=null){            vh.musicAuther.setText(auther);        }else {            vh.musicAuther.setText("<未知>");        }//        获得图片        byte[] image=mmr.getEmbeddedPicture();        if(image!=null){            Bitmap bitmap= BitmapFactory.decodeByteArray(image,0,image.length);            vh.img.setImageBitmap(bitmap);        }else{            vh.img.setImageResource(R.mipmap.ic_launcher);        }        return convertView;    }    class ViewHolder{        TextView musicName;        TextView musicAuther;        ImageView img;    }

动态注册广播

//          注册广播        myBroad = new MyBroadCastService();        IntentFilter filter = new IntentFilter();        filter.addAction(MUSIC_TIME);        registerReceiver(myBroad, filter);

　　注销广播

//    动态注册注销广播    @Override    protected void onDestroy() {        super.onDestroy();        unregisterReceiver(myBroad);    }

新建广播实例

    //    在活动中接受广播以便设置UI参数    class MyBroadCastService extends BroadcastReceiver {        @Override        public void onReceive(Context context, Intent intent) {            int type = intent.getIntExtra("type", 0);            switch (type) {                case 0:                    int time = intent.getIntExtra("time", 0);                    mSeekBar.setMax(time);                    Date date1=new Date(time);                    SimpleDateFormat format1=new SimpleDateFormat("mm:ss");                    String s1=format1.format(date1);                    mTextViewAllTime.setText(s1);                    break;                case 1:                    int time1 = intent.getIntExtra("time", 0);                    mSeekBar.setProgress(time1);                    Date date=new Date(time1);                    SimpleDateFormat format=new SimpleDateFormat("mm:ss");                    String s=format.format(date);                    mTextViewCurrentTime.setText(s);                    break;            }        }    }

打开音乐

主线程中设置点击事件

//        打开服务，在服务中打开音乐        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                Intent intent = new Intent(getApplicationContext(), MyService.class);//                将点击位置的音乐路径传到服务中                intent.putExtra("musicPath", musics[position].getAbsolutePath());                intent.putExtra("musicName", musics[position].getName());                intent.putExtra("type",Config.MUSIC_CLICK_START);                startService(intent);//                用于设置下一首上一首音乐                mPosition =position;            }        });

服务中实现打开音乐

 private void startMusic(Intent intent) {        String musicPath = intent.getStringExtra("musicPath");        musicName= intent.getStringExtra("musicName");//        防止多个歌曲重复        if (mediaPlayer == null) {            mediaPlayer = new MediaPlayer();        }        mediaPlayer.reset();        try {            mediaPlayer.setDataSource(musicPath);            mediaPlayer.prepare();            mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {                @Override                public void onPrepared(MediaPlayer mp) {                    mp.start();                    int allTime = mediaPlayer.getDuration();//                   发送广播将时间参数送过去                    Intent intent1 = new Intent(MainActivity.MUSIC_TIME);                    intent1.putExtra("type", 0);                    intent1.putExtra("time", allTime);                    intent1.putExtra("name",musicName);                    sendBroadcast(intent1);//                    服务中不能进行耗时操作,启动一个线程来传递音乐进度条（耗时操作）                    MySeekBar seekBar = new MySeekBar();                    seekBar.start();                }            });        } catch (IOException e) {            e.printStackTrace();        }    }

服务其中打开的线程

  class MySeekBar extends Thread {        @Override        public void run() {//            super.run();            while (mediaPlayer.isPlaying()) {                int now = mediaPlayer.getCurrentPosition();                Intent intent1 = new Intent(MainActivity.MUSIC_TIME);                intent1.putExtra("type", 1);                intent1.putExtra("time", now);                sendBroadcast(intent1);                try {//                    休眠一秒                    Thread.sleep(1000);                } catch (InterruptedException e) {                    e.printStackTrace();                }            }        }    }

这里写图片描述

实现音乐随进度条播放

主线程中设置点击事件

//        设置音乐随着seekbar的跳转        mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {            @Override            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {            }            @Override            public void onStartTrackingTouch(SeekBar seekBar) {            }            @Override            public void onStopTrackingTouch(SeekBar seekBar) {                Intent intent=new Intent(getApplicationContext(),MyService.class);                intent.putExtra("type", Config.MUSIC_SEEK);                intent.putExtra("progress",seekBar.getProgress());                startService(intent);            }        });

服务中实现音乐随进度条播放

  private void seekToProgress(Intent intent) {        int progress = intent.getIntExtra("progress", 0);//                歌曲跳转到progress的位置后保持原来状态        mediaPlayer.seekTo(progress);    }

这里写图片描述

实现音乐暂停

主线程中设置点击事件

 mBtnPauseMusic.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                Intent intent=new Intent(getApplicationContext(),MyService.class);                intent.putExtra("flag", flag);                intent.putExtra("type", Config.MUSIC_BUTTON_PAUSE);                startService(intent);                flag=!flag;            }        });

服务中实现音乐暂停

 private void pauseMusic(Intent intent) {        boolean flag = intent.getBooleanExtra("flag", true);        if (!flag) {//                    此时线程关闭了            mediaPlayer.pause();        } else {//                  跳转到暂停后滑动到的位置            int keepOn = mediaPlayer.getCurrentPosition();            mediaPlayer.seekTo(keepOn);            mediaPlayer.start();//                    再次打开线程            MySeekBar seekBar = new MySeekBar();            seekBar.start();        }    }

这里写图片描述

实现下一首音乐

主线程中设置点击事件

//      设置下一首音乐        mBtnNextMusic.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {//                不是最后一首音乐时mPosition才+1                if(mPosition!=musics.length-1){                    mPosition++;                }                Intent intent = new Intent(getApplicationContext(), MyService.class);//                将点击位置的音乐路径传到服务中                intent.putExtra("musicPath", musics[mPosition].getAbsolutePath());                intent.putExtra("musicName", musics[mPosition].getName());                intent.putExtra("type", Config.MUSIC_NEXT);                startService(intent);            }        });

服务中实现下一首音乐

　　在服务中调用打开音乐方法startMusic(intent)

这里写图片描述

实现上一首音乐

主线程中设置点击事件

//        设置上一首音乐        mBtnBeforeMusic.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {//                      不是第一首音乐时mPosition才-1                if(mPosition!=0){                    mPosition--;                }                Intent intent = new Intent(getApplicationContext(), MyService.class);//                将点击位置的音乐路径传到服务中                intent.putExtra("musicPath", musics[mPosition].getAbsolutePath());                intent.putExtra("musicName", musics[mPosition].getName());                intent.putExtra("type", Config.MUSIC_PREVIOUS);                startService(intent);            }        });

服务中实现上一首音乐

　　在服务中调用打开音乐方法startMusic(intent)

这里写图片描述

全部代码

布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:gravity="center"    android:orientation="vertical"    tools:context=".MainActivity">    <ListView        android:id="@+id/listview"        android:layout_width="match_parent"        android:layout_height="0dp"        android:paddingBottom="@dimen/activity_vertical_margin"        android:paddingLeft="@dimen/activity_horizontal_margin"        android:paddingRight="@dimen/activity_horizontal_margin"        android:paddingTop="@dimen/activity_vertical_margin"        android:cacheColorHint="#00000000"        android:background="#ffffff"        android:divider="@null"        android:layout_weight="1"></ListView>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:background="@drawable/background"        android:orientation="vertical">        <RelativeLayout            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:gravity="center">            <TextView                android:id="@+id/textview_current_time"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_margin="5dp"                android:text="00:00" />            <TextView                android:id="@+id/textview_all_time"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_alignParentRight="true"                android:layout_margin="5dp"                android:text="00:00" />        </RelativeLayout>        <SeekBar            android:id="@+id/seekbar"            android:layout_width="match_parent"            android:layout_height="wrap_content" />        <LinearLayout            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:padding="5dp"            android:gravity="center">            <CheckBox                android:id="@+id/btn_brfore_music"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:background="@drawable/previous_music"                android:button="@null" />            <CheckBox                android:id="@+id/btn_pause_music"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginLeft="30dp"                android:layout_marginRight="30dp"                android:background="@drawable/start_pause_press"                android:button="@null" />            <CheckBox                android:id="@+id/btn_next_music"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:background="@drawable/next_music"                android:button="@null" />        </LinearLayout>    </LinearLayout></LinearLayout>

这里写图片描述

ListViewitem布局

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal" android:layout_width="match_parent"android:gravity="center_vertical"    android:layout_height="match_parent">    <ImageView        android:id="@+id/img"        android:layout_width="70dp"        android:layout_height="70dp"        android:layout_margin="10dp"        android:src="@mipmap/ic_launcher"/><TextView    android:id="@+id/textview_music_name"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_margin="10dp"    android:text="音乐名称"/>    <TextView        android:id="@+id/tv_music_auther"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="作家"        android:layout_margin="10dp"        /></LinearLayout>

这里写图片描述

主线程

package com.example.laowang.mymediaplayer;import android.app.Activity;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Environment;import android.os.Bundle;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.Window;import android.widget.AdapterView;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.ListView;import android.widget.SeekBar;import android.widget.TextView;import com.example.laowang.mymediaplayer.adapter.Config;import com.example.laowang.mymediaplayer.adapter.MusicAdapter;import java.io.File;import java.text.SimpleDateFormat;import java.util.Date;public class MainActivity extends Activity{    private CheckBox mBtnBeforeMusic;    private CheckBox mBtnPauseMusic;    private CheckBox mBtnNextMusic;    private SeekBar mSeekBar;    private ListView mListView;    private TextView mTextViewAllTime;    private TextView mTextViewCurrentTime;    private TextView mTextViewMusicName;    private MyBroadCastService myBroad;    private int mPosition;    private File[] musics;    private boolean flag;    public static final String MUSIC_TIME = "com.laowang.music";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        setContentView(R.layout.activity_main);        mBtnBeforeMusic = (CheckBox) findViewById(R.id.btn_brfore_music);        mBtnNextMusic = (CheckBox) findViewById(R.id.btn_next_music);        mBtnPauseMusic = (CheckBox) findViewById(R.id.btn_pause_music);        mSeekBar = (SeekBar) findViewById(R.id.seekbar);        mListView = (ListView) findViewById(R.id.listview);        mTextViewAllTime = (TextView) findViewById(R.id.textview_all_time);        mTextViewCurrentTime = (TextView) findViewById(R.id.textview_current_time);        mTextViewMusicName = (TextView) findViewById(R.id.textview_music_name);//        获得所有的歌曲        final File music = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC);        musics = music.listFiles();        for (File item:musics){            Log.d("歌曲的位置", "→"+item);        }//          添加到listView中        final LayoutInflater inflater = getLayoutInflater();        MusicAdapter musicAdapter = new MusicAdapter(inflater, musics);        mListView.setAdapter(musicAdapter);//          注册广播        myBroad = new MyBroadCastService();        IntentFilter filter = new IntentFilter();        filter.addAction(MUSIC_TIME);        registerReceiver(myBroad, filter);//      设置下一首音乐        mBtnNextMusic.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {//                不是最后一首音乐时mPosition才+1                if(mPosition!=musics.length-1){                    mPosition++;                }                Intent intent = new Intent(getApplicationContext(), MyService.class);//                将点击位置的音乐路径传到服务中                intent.putExtra("musicPath", musics[mPosition].getAbsolutePath());                intent.putExtra("musicName", musics[mPosition].getName());                intent.putExtra("type", Config.MUSIC_NEXT);                startService(intent);            }        });//        设置上一首音乐        mBtnBeforeMusic.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {//                      不是第一首音乐时mPosition才-1                if(mPosition!=0){                    mPosition--;                }                Intent intent = new Intent(getApplicationContext(), MyService.class);//                将点击位置的音乐路径传到服务中                intent.putExtra("musicPath", musics[mPosition].getAbsolutePath());                intent.putExtra("musicName", musics[mPosition].getName());                intent.putExtra("type", Config.MUSIC_PREVIOUS);                startService(intent);            }        });//      设置音乐暂停开始        mBtnPauseMusic.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                Intent intent=new Intent(getApplicationContext(),MyService.class);                intent.putExtra("flag", flag);                intent.putExtra("type", Config.MUSIC_BUTTON_PAUSE);                startService(intent);                flag=!flag;            }        });//        打开服务，在服务中打开音乐        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                Intent intent = new Intent(getApplicationContext(), MyService.class);//                将点击位置的音乐路径传到服务中                intent.putExtra("musicPath", musics[position].getAbsolutePath());                intent.putExtra("musicName", musics[position].getName());                intent.putExtra("type",Config.MUSIC_CLICK_START);                startService(intent);//                用于设置下一首上一首音乐                mPosition =position;            }        });//        设置音乐随着seekbar的跳转        mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {            @Override            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {            }            @Override            public void onStartTrackingTouch(SeekBar seekBar) {            }            @Override            public void onStopTrackingTouch(SeekBar seekBar) {                Intent intent=new Intent(getApplicationContext(),MyService.class);                intent.putExtra("type", Config.MUSIC_SEEK);                intent.putExtra("progress",seekBar.getProgress());                startService(intent);            }        });    }//    动态注册注销广播    @Override    protected void onDestroy() {        super.onDestroy();        unregisterReceiver(myBroad);    }    //    在活动中接受广播以便设置UI参数    class MyBroadCastService extends BroadcastReceiver {        @Override        public void onReceive(Context context, Intent intent) {            int type = intent.getIntExtra("type", 0);            switch (type) {                case 0:                    int time = intent.getIntExtra("time", 0);                    mSeekBar.setMax(time);                    Date date1=new Date(time);                    SimpleDateFormat format1=new SimpleDateFormat("mm:ss");                    String s1=format1.format(date1);                    mTextViewAllTime.setText(s1);                    String name=intent.getStringExtra("name");                    mTextViewMusicName.setText(name);                    break;                case 1:                    int time1 = intent.getIntExtra("time", 0);                    mSeekBar.setProgress(time1);                    Date date=new Date(time1);                    SimpleDateFormat format=new SimpleDateFormat("mm:ss");                    String s=format.format(date);                    mTextViewCurrentTime.setText(s);                    break;            }        }    }}

适配器

package com.example.laowang.mymediaplayer.adapter;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.media.MediaMetadataRetriever;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;import com.example.laowang.mymediaplayer.R;import java.io.File;/** * Created by Administrator on 2015/9/10. */public class MusicAdapter extends BaseAdapter {    private LayoutInflater mInflater;    private File[] musics;    public MusicAdapter(LayoutInflater mInflater, File[] musics) {        this.mInflater = mInflater;        this.musics = musics;    }    @Override    public int getCount() {        return musics.length;    }    @Override    public Object getItem(int position) {        return position;    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder vh=null;        if(convertView==null){            vh=new ViewHolder();            convertView=mInflater.inflate(R.layout.listview_item,null);            vh.musicName = (TextView) convertView.findViewById(R.id.textview_music_name);            vh.musicAuther = (TextView) convertView.findViewById(R.id.tv_music_auther);            vh.img= (ImageView) convertView.findViewById(R.id.img);            convertView.setTag(vh);        }        vh= (ViewHolder) convertView.getTag();//        设置音乐名称        vh.musicName.setText(musics[position].getName());//      获取作家        MediaMetadataRetriever mmr=new MediaMetadataRetriever();        mmr.setDataSource(musics[position].getAbsolutePath());        String auther=mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST);//        判断作者是否为空        if(auther!=null){            vh.musicAuther.setText(auther);        }else {            vh.musicAuther.setText("<未知>");        }//        获得图片        byte[] image=mmr.getEmbeddedPicture();        if(image!=null){            Bitmap bitmap= BitmapFactory.decodeByteArray(image,0,image.length);            vh.img.setImageBitmap(bitmap);        }else{            vh.img.setImageResource(R.mipmap.ic_launcher);        }        return convertView;    }    class ViewHolder{        TextView musicName;        TextView musicAuther;        ImageView img;    }}

服务

package com.example.laowang.mymediaplayer;import android.app.Service;import android.content.Intent;import android.media.MediaPlayer;import android.os.IBinder;import android.support.annotation.Nullable;import com.example.laowang.mymediaplayer.adapter.Config;import java.io.IOException;/** * Created by Administrator on 2015/9/10. */public class MyService extends Service {    private MediaPlayer mediaPlayer;    private boolean flag;    private String musicName;    @Nullable    @Override    public IBinder onBind(Intent intent) {        return null;    }    @Override    public int onStartCommand(final Intent intent, int flags, int startId) {        int type = intent.getIntExtra("type", Config.MUSIC_CLICK_START);        switch (type) {            case Config.MUSIC_CLICK_START:                startMusic(intent);                break;            case Config.MUSIC_SEEK:                seekToProgress(intent);                break;            case Config.MUSIC_BUTTON_PAUSE:                pauseMusic(intent);                break;            case Config.MUSIC_NEXT:                startMusic(intent);                break;            case Config.MUSIC_PREVIOUS:                startMusic(intent);                break;            default:                break;        }        return super.onStartCommand(intent, flags, startId);    }    private void seekToProgress(Intent intent) {        int progress = intent.getIntExtra("progress", 0);//                歌曲跳转到progress的位置后保持原来状态        mediaPlayer.seekTo(progress);    }    private void pauseMusic(Intent intent) {        boolean flag = intent.getBooleanExtra("flag", true);        if (!flag) {//                    此时线程关闭了            mediaPlayer.pause();        } else {//                  跳转到暂停后滑动到的位置            int keepOn = mediaPlayer.getCurrentPosition();            mediaPlayer.seekTo(keepOn);            mediaPlayer.start();//                    再次打开线程            MySeekBar seekBar = new MySeekBar();            seekBar.start();        }    }    private void startMusic(Intent intent) {        String musicPath = intent.getStringExtra("musicPath");        musicName= intent.getStringExtra("musicName");//        防止多个歌曲重复        if (mediaPlayer == null) {            mediaPlayer = new MediaPlayer();        }        mediaPlayer.reset();        try {            mediaPlayer.setDataSource(musicPath);            mediaPlayer.prepare();            mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {                @Override                public void onPrepared(MediaPlayer mp) {                    mp.start();                    int allTime = mediaPlayer.getDuration();//                   发送广播将时间参数送过去                    Intent intent1 = new Intent(MainActivity.MUSIC_TIME);                    intent1.putExtra("type", 0);                    intent1.putExtra("time", allTime);                    intent1.putExtra("name",musicName);                    sendBroadcast(intent1);//                    服务中不能进行耗时操作,启动一个线程来传递音乐进度条（耗时操作）                    MySeekBar seekBar = new MySeekBar();                    seekBar.start();                }            });        } catch (IOException e) {            e.printStackTrace();        }    }    class MySeekBar extends Thread {        @Override        public void run() {//            super.run();            while (mediaPlayer.isPlaying()) {                int now = mediaPlayer.getCurrentPosition();                Intent intent1 = new Intent(MainActivity.MUSIC_TIME);                intent1.putExtra("type", 1);                intent1.putExtra("time", now);                sendBroadcast(intent1);                try {//                    休眠一秒                    Thread.sleep(1000);                } catch (InterruptedException e) {                    e.printStackTrace();                }            }        }    }}

存放静态常量的类

package com.example.laowang.mymediaplayer.adapter;/** * Created by Administrator on 2015/9/10. */public class Config {    public static final int MUSIC_CLICK_START =1;    public static final int MUSIC_SEEK=0;    public static final int MUSIC_BUTTON_PAUSE =2;    public static final int MUSIC_BUTTON_START=3;    public static final int MUSIC_NEXT=5;    public static final int MUSIC_PREVIOUS =4;}

AndroidMainFest

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.laowang.mymediaplayer" ><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <service android:name=".MyService"/>    </application></manifest>

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