Android如何从sdcard /文件管理器加载音频文件并播放

Question

I'm developing an app, and in that app I have one button, named 'choose sound'. When user will click this button, he/she should be asked to choose any audio file from the file manager/memory.

So, I know that for this, I'll have to use Intent.Action_GetData . I'm doing the same:

//code start
Intent intent = new Intent();
intent.setType("audio/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent,1);

@Override 
protected void onActivityResult(int requestCode,int resultCode,Intent data){

  if(requestCode == 1){

    if(resultCode == RESULT_OK){

        //the selected audio.
        Uri uri = data.getData(); 
int SoundID=soundPool.Load(uri.toString(), 1);
//SoundPool is already constructed and is working perfectly for the resource files
PlaySound(SoundID);
//PlaySound method is already defined
    }
  }
  super.onActivityResult(requestCode, resultCode, data);
}
//end of code

but it's not working
Now, in OnActivityResult , I'm not getting that how to load the proper URI of the file selected by user, because before Android 4.4 , it returns the different URI and after Android 4.4 it returns the different URI on intent.GetData(); . Now, what I have to do?

Also, I know that for playing the audio file, I'll have to use SoundPool , and I have the code for that too, in fact it's working fine for the resource/raw/audio files, but how to load/play files in SoundPool from this URI ?

Answer 1

In your onActivityResult() , do the following changes:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == Activity.RESULT_OK && data != null)
    {
        String realPath = null;
        Uri uriFromPath = null;

        realPath = getPathForAudio(YourActivity.this, data.getData());
        uriFromPath = Uri.fromFile(new File(realPath)); // use this uriFromPath for further operations
    }
}     

Add this method in your Activity :

public static String getPathForAudio(Context context, Uri uri)
 {
    String result = null;
    Cursor cursor = null;

    try {
        String[] proj = { MediaStore.Audio.Media.DATA };
        cursor = context.getContentResolver().query(uri, proj, null, null, null);
        if (cursor == null) {
            result = uri.getPath();
        } else {
            cursor.moveToFirst();
            int column_index = cursor.getColumnIndex(MediaStore.Audio.AudioColumns.DATA);
            result = cursor.getString(column_index);
            cursor.close();
        }
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
    finally {
        if (cursor != null) {
            cursor.close();
        }
    }
    return result;
}

Hope It will do your job. You can play audio using MediaPlayer class also

Answer 2

You can put below codes in your project when you want to select audio.

Intent intent_upload = new Intent();
intent_upload.setType("audio/*");
intent_upload.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent_upload,1);

And override onActivityResult in the same Activity, as below

@Override 
protected void onActivityResult(int requestCode,int resultCode,Intent data){

  if(requestCode == 1){

    if(resultCode == RESULT_OK){

        //the selected audio.
        Uri uri = data.getData(); 
    }
  }
  super.onActivityResult(requestCode, resultCode, data);
}

Answer 3

Try to get the path :

 //method to get the file path from uri
    public String getPath(Uri uri) {
        Cursor cursor = getContentResolver().query(uri, null, null, null, null);
        cursor.moveToFirst();
        String document_id = cursor.getString(0);
        document_id = document_id.substring(document_id.lastIndexOf(":") + 1);
        cursor.close();

        cursor = getContentResolver().query(
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                null, MediaStore.Images.Media._ID + " = ? ", new String[]{document_id}, null);
        cursor.moveToFirst();
        String path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
        cursor.close();

        return path;
    }

then load it :

s2 = soundPool.load(YOU_PATH, PRIORITY);