如何從MediaPlayer獲取當前播放歌曲的詳細信息

Question

有什麼方法可以獲取MediaPlayer播放的當前歌曲的詳細信息？

Answer 1

沒有documented method從MediaPlayer實例獲取當前播放文件的信息，您需要讓應用程序以另一種方式存儲該信息。如果您使用服務來跟蹤您的MediaPlayer實例（我建議），那麼這應該不會太難。

Answer 2

我認爲你需要有你自己的模型班，從中你可以設置和獲得你的歌曲標題。有關此信息和其他信息，請參閱堆棧溢出問題：
How to set the PlayList Index for Mediaplayer(ExpressionMediaPlayer:Mediaplayer)。

如果你想知道它是如何實現的，你可以得到source並看看它們是如何實現的。

Answer 3

僅作參考，這個工程：

import android.app.Activity; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.os.Bundle; 
import android.util.Log; 

public class MediaPlayer extends Activity { 

public static final String SERVICECMD = "com.android.music.musicservicecommand"; 
public static final String CMDNAME = "command"; 
public static final String CMDTOGGLEPAUSE = "togglepause"; 
public static final String CMDSTOP = "stop"; 
public static final String CMDPAUSE = "pause"; 
public static final String CMDPREVIOUS = "previous"; 
public static final String CMDNEXT = "next"; 
/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.main); 
IntentFilter iF = new IntentFilter(); 
iF.addAction("com.android.music.metachanged"); 
iF.addAction("com.android.music.playstatechanged"); 
iF.addAction("com.android.music.playbackcomplete"); 
iF.addAction("com.android.music.queuechanged"); 

registerReceiver(mReceiver, iF); 
} 

private BroadcastReceiver mReceiver = new BroadcastReceiver() { 

@Override 
public void onReceive(Context context, Intent intent) 
{ 
String action = intent.getAction(); 
String cmd = intent.getStringExtra("command"); 
Log.d("mIntentReceiver.onReceive ", action + "/" + cmd); 
String artist = intent.getStringExtra("artist"); 
String album = intent.getStringExtra("album"); 
String track = intent.getStringExtra("track"); 
Log.d("Music",artist+":"+album+":"+track); 
} 
}; 
} 

Answer 4

我學會了如何做到這一點剛纔，所以我不知道這是否適用於Android的所有版本呢。

private void getTrackInfo(Uri audioFileUri) { 
    MediaMetadataRetriever metaRetriever= new MediaMetadataRetriever(); 
    metaRetriever.setDataSource(getRealPathFromURI(audioFileUri)); 
    String artist = metaRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST); 
    String title = metaRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_TITLE); 

} 


private String getRealPathFromURI(Uri uri) { 
    File myFile = new File(uri.getPath().toString()); 
    String s = myFile.getAbsolutePath(); 
    return s; 
}