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我在android中構建音樂播放器應用程序。在單擊listItem時,相應的歌曲將播放,歌曲的名稱將顯示在搜索欄上方的TextView中,其ID爲「selectedItem」。但是數據綁定是在MediaCursorAdapter.class中完成的,它將MediaStore.MediaColumns.DATA作爲字符串返回到MainActivity.java類的onListItemClick()方法。這裏當前歌曲的名字被設置爲字符串。但是這顯示了App中歌曲的整個路徑,看起來很糟糕。有沒有辦法在我的MainActivity.java類中獲取DISPLAY_NAME,或者以某種方式縮短此路徑,以便在應用程序中看起來不那麼糟糕?在Android MediaStore中使用DATA獲取DISPLAY_NAME

MainActivity.java

@Override 
protected void onListItemClick(ListView l, View v, int position, long id) { 
    super.onListItemClick(l, v, position, id); 
    currentFile = (String) v.getTag(); 
    startPlay(currentFile); 
} 

MediaCursorAdapter.java

@Override 
public void bindView(View view, Context context, Cursor cursor) { 
    //TextView title = (TextView) view.findViewById(R.id.title_name); 
    TextView displayName = (TextView) view.findViewById(R.id.display_name); 
    TextView duration = (TextView) view.findViewById(R.id.duration); 
    String nameOfTheSong = cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.DISPLAY_NAME)); 
    nameOfTheSong = nameOfTheSong.substring(0,nameOfTheSong.length()-4); 
    displayName.setText(nameOfTheSong); 
    //title.setText(cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.TITLE))); 
    long durationInMS = Long.parseLong(cursor.getString(cursor.getColumnIndex(MediaStore.Audio.AudioColumns.DURATION))); 
    double durationInMin = ((double)durationInMS/1000.0)/60.0; 
    BigDecimal bigDecimal = new BigDecimal(durationInMin); 
    durationInMin = bigDecimal.setScale(2, RoundingMode.HALF_UP).doubleValue(); 
    duration.setText(""+durationInMin); 
    //SETTING THE PATH WHICH IS THEN USED IN onListItemClick OF THE MAINACTIVITY.JAVA CLASS 
    view.setTag(cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.DATA))); 
} 

Github上鍊接:https://github.com/vishwabhat19/PlayMusic.git

回答

0

你不告訴你如何讓你的光標,但你可以使用:

MediaStore.Audio.Media.TITLE 

或者如果您有完整路徑

String trackname = fullpath.substring(fullpath.lastIndexOf("/") + 1, fullpath.length()); 
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