Android简易本地音乐播放器源码，基于Android的简易本地音乐播放器源码

package com.animee.localmusic; import android.content.ContentResolver; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.media.MediaPlayer; import android.net.Uri; import android.provider.MediaStore; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.util.Log; import android.view.View; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; public class MainActivity extends AppCompatActivity implements View.OnClickListener{ ImageView nextIv,playIv,lastIv,albumIv; TextView singerTv,songTv; RecyclerView musicRv; // 数据源 List<LocalMusicBean>mDatas; private LocalMusicAdapter adapter; // 记录当前正在播放的音乐的位置 int currnetPlayPosition = -1; // 记录暂停音乐时进度条的位置 int currentPausePositionInSong = 0; MediaPlayer mediaPlayer; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); mediaPlayer = new MediaPlayer(); mDatas = new ArrayList<>(); // 创建适配器对象 adapter = new LocalMusicAdapter(this, mDatas); musicRv.setAdapter(adapter); // 设置布局管理器 LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false); musicRv.setLayoutManager(layoutManager); // 加载本地数据源 loadLocalMusicData(); // 设置每一项的点击事件 setEventListener(); } private void setEventListener() { /* 设置每一项的点击事件*/ adapter.setOnItemClickListener(new LocalMusicAdapter.OnItemClickListener() { @Override public void OnItemClick(View view, int position) { currnetPlayPosition = position; LocalMusicBean musicBean = mDatas.get(position); playMusicInMusicBean(musicBean); } }); } public void playMusicInMusicBean(LocalMusicBean musicBean) { /*根据传入对象播放音乐*/ //设置底部显示的歌手名称和歌曲名 singerTv.setText(musicBean.getSinger()); songTv.setText(musicBean.getSong()); stopMusic(); // 重置多媒体播放器 mediaPlayer.reset(); // 设置新的播放路径 try { mediaPlayer.setDataSource(musicBean.getPath()); String albumArt = musicBean.getAlbumArt(); Log.i("lsh123", "playMusicInMusicBean: albumpath=="+albumArt); Bitmap bm = BitmapFactory.decodeFile(albumArt); Log.i("lsh123", "playMusicInMusicBean: bm=="+bm); albumIv.setImageBitmap(bm); playMusic(); } catch (IOException e) { e.printStackTrace(); } } /* * 点击播放按钮播放音乐，或者暂停从新播放 * 播放音乐有两种情况： * 1.从暂停到播放 * 2.从停止到播放 * */ private void playMusic() { /* 播放音乐的函数*/ if (mediaPlayer!=null&&!mediaPlayer.isPlaying()) { if (currentPausePositionInSong == 0) { try { mediaPlayer.prepare(); mediaPlayer.start(); } catch (IOException e) { e.printStackTrace(); } }else{ // 从暂停到播放 mediaPlayer.seekTo(currentPausePositionInSong); mediaPlayer.start(); } playIv.setImageResource(R.mipmap.icon_pause); } } private void pauseMusic() { /* 暂停音乐的函数*/ if (mediaPlayer!=null&&mediaPlayer.isPlaying()) { currentPausePositionInSong = mediaPlayer.getCurrentPosition(); mediaPlayer.pause(); playIv.setImageResource(R.mipmap.icon_play); } } private void stopMusic() { /* 停止音乐的函数*/ if (mediaPlayer!=null) { currentPausePositionInSong = 0; mediaPlayer.pause(); mediaPlayer.seekTo(0); mediaPlayer.stop(); playIv.setImageResource(R.mipmap.icon_play); } } @Override protected void onDestroy() { super.onDestroy(); stopMusic(); } private void loadLocalMusicData() { /* 加载本地存储当中的音乐mp3文件到集合当中*/ // 1.获取ContentResolver对象 ContentResolver resolver = getContentResolver(); // 2.获取本地音乐存储的Uri地址 Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; // 3 开始查询地址 Cursor cursor = resolver.query(uri, null, null, null, null); // 4.遍历Cursor int id = 0; while (cursor.moveToNext()) { String song = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE)); String singer = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST)); String album = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM)); id++; String sid = String.valueOf(id); String path = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA)); long duration = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.DURATION)); SimpleDateFormat sdf = new SimpleDateFormat("mm:ss"); String time = sdf.format(new Date(duration)); // 获取专辑图片主要是通过album_id进行查询 String album_id = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID)); String albumArt = getAlbumArt(album_id); // 将一行当中的数据封装到对象当中 LocalMusicBean bean = new LocalMusicBean(sid, song, singer, album, time, path,albumArt); mDatas.add(bean); } // 数据源变化，提示适配器更新 adapter.notifyDataSetChanged(); } private String getAlbumArt(String album_id) { String mUriAlbums = "content://media/external/audio/albums"; String[] projection = new String[]{"album_art"}; Cursor cur = this.getContentResolver().query( Uri.parse(mUriAlbums + "/" + album_id), projection, null, null, null); String album_art = null; if (cur.getCount() > 0 && cur.getColumnCount() > 0) { cur.moveToNext(); album_art = cur.getString(0); } cur.close(); cur = null; return album_art; } private void initView() { /* 初始化控件的函数*/ nextIv = findViewById(R.id.local_music_bottom_iv_next); playIv = findViewById(R.id.local_music_bottom_iv_play); lastIv = findViewById(R.id.local_music_bottom_iv_last); albumIv = findViewById(R.id.local_music_bottom_iv_icon); singerTv = findViewById(R.id.local_music_bottom_tv_singer); songTv = findViewById(R.id.local_music_bottom_tv_song); musicRv = findViewById(R.id.local_music_rv); nextIv.setOnClickListener(this); lastIv.setOnClickListener(this); playIv.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.local_music_bottom_iv_last: if (currnetPlayPosition ==0) { Toast.makeText(this,"已经是第一首了，没有上一曲！",Toast.LENGTH_SHORT).show(); return;