我需要在ListView從SD卡獲取的音樂專輯元數據

Question

import android.app.Activity; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Color; 
import android.media.MediaMetadataRetriever; 
import android.os.Bundle; 
import android.widget.ImageView; 
import android.widget.TextView; 

public class MetaExtractActivity extends Activity { ImageView album_art; 

TextView album, artist, genre; MediaMetadataRetriever metaRetriever; 
byte[] art; 

@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); 
setContentView(R.layout.main); 
getInit(); 

// Ablum_art retrieval code 
// metaRetriever = new MediaMetadataRetriever(); 

metaRetriever.setDataSource("/sdcard/audio.mp3"); 

try 
{ 
    art = metaRetriever.getEmbeddedPicture(); 
    Bitmap songImage = BitmapFactory .decodeByteArray(art, 0, art.length); album_art.setImageBitmap(songImage); 
    album.setText(metaRetriever .extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM)); artist.setText(metaRetriever .extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST)); genre.setText(metaRetriever .extractMetadata(MediaMetadataRetriever.METADATA_KEY_GENRE)); 
} 
catch (Exception e) { album_art.setBackgroundColor(Color.GRAY); 

album.setText("Unknown Album"); 

artist.setText("Unknown Artist"); 
genre.setText("Unknown Genre"); 
} } 

//獲取編號的形式XML公共無效getInit（）{album_art =（ImageView的）findViewById（R.id.album_art）;

album = (TextView) findViewById(R.id.Album); 

artist = (TextView) findViewById(R.id.artist_name); 
genre = (TextView) findViewById(R.id.genre); 
} } 

Answer 1

您可以使用圖書館Apache Tika，這將有助於只要它是可用你的文件的可用信息。

注意：不保證您的文件包含您需要的元數據。

相關片段中使用Java：

public static void main(String[] args) { 
      String fileLocation = "C:/desktopname/songs/song.mp3"; 

      try { 

      InputStream input = new FileInputStream(new File(fileLocation)); 
      ContentHandler handler = new DefaultHandler(); 
      Metadata metadata = new Metadata(); 
      Parser parser = new Mp3Parser(); 
      ParseContext parseCtx = new ParseContext(); 
      parser.parse(input, handler, metadata, parseCtx); 
      input.close(); 

      // List all metadata 
      String[] metadataNames = metadata.names(); 

      for(String name : metadataNames){ 
      System.out.println(name + ": " + metadata.get(name)); 
      } 

      // Retrieve the necessary info from metadata 
      // Names - title, xmpDM:artist etc. - mentioned below may differ based 
      System.out.println("----------------------------------------------"); 
      System.out.println("Title: " + metadata.get("title")); 
      System.out.println("Artists: " + metadata.get("xmpDM:artist")); 
      System.out.println("Composer : "+metadata.get("xmpDM:composer")); 
      System.out.println("Genre : "+metadata.get("xmpDM:genre")); 
      System.out.println("Album : "+metadata.get("xmpDM:album")); 

      } catch (Exception e) { } 

    } 

要在Android中使用它，你只需要獲取文件的正確URI，然後使用上面的代碼。