功能点:
1.支持本地sd卡路径下.mp3文件播放
2.上下歌曲切换
3.暂停、播放功能
4.手动控制进度条
5.支持安卓8.1+(需要apk访问sd卡权限)
功能展示:
代码实现
public class MainActivity extends ListActivity {
private TextView text;
private SeekBar seekbar;
private Button startplay;
private ListView songlist;
private MediaPlayer player;
private int current;
private boolean isPause;
private List<Map<String, String>> data;
private Handler handler = new Handler();
private boolean isStartTrackingTouch;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//当前歌曲名称
text = (TextView) findViewById(R.id.song_name);
//进度信息
seekbar = (SeekBar) findViewById(R.id.song_seekbar);
//开始按钮
startplay = (Button) findViewById(R.id.playbt);
//List信息,需要加载的歌曲列表信息
songlist = (ListView) findViewById(android.R.id.list);
//创建播放器
player = new MediaPlayer();
//显示播放列表信息
ShowPlayList();
//播放器监听 实现下一首自动播放
player.setOnCompletionListener(new FinshListner());
//设置进度条信息
seekbar.setOnSeekBarChangeListener(new seekbarListner());
}
@Override
public void onResume(){
super.onResume();
resume();
}
//进度条手动拉拽监听
private final class seekbarListner implements SeekBar.OnSeekBarChangeListener{
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser){};
public void onStartTrackingTouch(SeekBar seekBar){
//触发操作时,Runnable暂停操作,有判断条件
isStartTrackingTouch = true;
};
public void onStopTrackingTouch(SeekBar seekBar){
//人手动拉动进度条,需要调整播放进度
player.seekTo(seekBar.getProgress());
isStartTrackingTouch = false;
};
}
//进度条完成后,需要播放下一首歌曲
private final class FinshListner implements MediaPlayer.OnCompletionListener {
@Override
public void onCompletion(MediaPlayer mp) {
//播放下一首歌曲 可扩展随机播放下一首
NextSong();
}
}
//列表点击的监听 点击到具体的位置开始 播放
private final class MyItemListener implements AdapterView.OnItemClickListener {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
current = position;
//开始播放
play();
}
}
//播放列表显示
public void ShowPlayList(){
List<File> list = new ArrayList<File>();
//获取sd卡中所有的文件
GetSongList(Environment.getExternalStorageDirectory(),list);
Collections.sort(list);
data = new ArrayList<Map<String, String>>();
for (File file:list){
Map<String,String> Hashmap = new HashMap<String, String>();
Hashmap.put("name",file.getName());
Hashmap.put("path",file.getAbsolutePath());
data.add(Hashmap);
}
//data添加完成,可以设置显示为ListView
SimpleAdapter smpAdapter = new SimpleAdapter(this,data,R.layout.item,new String[]{"name"},new int[]{R.id.mName});
songlist.setAdapter(smpAdapter);
songlist.setOnItemClickListener(new MyItemListener());
}
//灵活处理点,支持本地或对端获取列表信息 输入为获取的目录信息
public void GetSongList(File file,List<File> filelist){
//歌曲目录下遍历所有的歌曲信息
File[] subfiles = file.listFiles();
//如果为空,则列出所有信息,把file添加到列表中
if (subfiles!=null){
for (File subfile:subfiles){
//判断如果类型为File,并且
if (subfile.isFile() && subfile.getName().endsWith(".mp3")){
filelist.add(subfile);
}else if(subfile.isDirectory()){
GetSongList(subfile,filelist);
}
}
}
}
//暂停、播放按钮
public void PlaySong(View view){
//默认播放第一首歌曲;如果当前为暂停,则设置为播放;如果当前为播放,则设置为暂停
if (!player.isPlaying()&&!isPause){
play();
return;
//直接结束
}
Button button = (Button) view;
//判断当前的text状态
if ( "▶" == button.getText()){
//当前为暂停的状态,点击就是恢复了
resume();
button.setText("||");
}else if ("||" == button.getText()){
pause();
button.setText("▶");
}
}
//下一首监听
public void NextSong(View view){
NextSong();
}
//上一首监听
public void PrevoisSong(View view){
PrevoisSong();
}
//播放下一首
private void NextSong(){
//把列表信息重新排列 取余的方法
current = (current + 1)%data.size();
play();
}
//播放上一首
private void PrevoisSong(){
//把列表信息重新排列
current = (current - 1<0)?(data .size()-1):(current-1);
play();
}
//恢复播放
public void resume(){
//判断是否
if (isPause){
player.start();
isPause = false;
}
}
public void pause(){
//直接暂停
if (player!=null && player.isPlaying()){
player.pause();
isPause = true;
}
}
private void play(){
//初始化MediaPlayer资源
player.reset();
try {
//获取需要播放的路径信息
player.setDataSource(data.get(current).get("path"));
player.prepare();
player.start();
} catch (IOException e) {
e.printStackTrace();
}
//设置显示歌名
text.setText(data.get(current).get("name"));
//设置MAX值为文件总时长
seekbar.setMax(player.getDuration());
//设置中间button为开始状态
startplay.setText("||");
//handler执行run方法刷新进度条
handler.post(new Runnable() {
@Override
public void run() {
if (!isStartTrackingTouch){
seekbar.setProgress(player.getCurrentPosition());
handler.postDelayed(this,2000);
}
}
});
}
}
布局文件信息
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/song_name"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<SeekBar
android:id="@+id/song_seekbar"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="|◀"
android:onClick="PrevoisSong"/>
<Button
android:id = "@+id/playbt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="▶"
android:onClick="PlaySong"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="▶|"
android:onClick="NextSong"/>
</LinearLayout>
<ListView
android:id = "@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10dp"
>
<TextView
android:id="@+id/mName"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="15sp"
/>
</LinearLayout>