Android: No Application perform this action, why?

i want to browse all Audio files, but i am getting error like No application can perform this action.. this is my code for browse activity...

--> private static final int SELECT_MUSIC = 1;

String selectedImagePath;

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

    ((Button) findViewById(R.id.browse)).setOnClickListener(new OnClickListener() {

        public void onClick(View arg0) {

            // in onCreate or any event where your want the user to
            // select a file
            Intent intent = new Intent();
            intent.setType("music/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            startActivityForResult(Intent.createChooser(intent,"Select File"), SELECT_MUSIC);
        }
    });
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        if (requestCode == SELECT_MUSIC) {
            Uri selectedImageUri = data.getData();
            selectedImagePath = getPath(selectedImageUri);
        }
    }
}

public String getPath(Uri uri) {
    String[] projection = {MediaStore.Images.Media.DATA};
    Cursor cur开发者_JAVA技巧sor = managedQuery(uri, projection, null, null, null);
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
}

and i have also added permission to menifest file:: READ_PHONE_STATE what's problem? any idea?

Thanks..

It means that No Application perform that action. Why? because None of the installed Applications perform that action. It has nothing to do with permissions.

You are probably running this on an emulator, which does not include any directory browser application.

The setType method is working with MIME type values only. If you really just need the handling of music files "audio/" should be ok (as mentioned before). To be more flexible, you should try to detect the MIME code of the file.

Here is a code snippit how this may look like:

FileNameMap fileNameMap = URLConnection.getFileNameMap();
type = fileNameMap.getContentTypeFor("file://" + file.getPath());

Or (pre Gingerbread)

if (!file.getName().contains("."))
   return null;
String ext = (String) file.getName().subSequence(
file.getName().lastIndexOf(".") + 1,
file.getName().length());

MimeTypeMap mimeMap = MimeTypeMap.getSingleton();
type = mimeMap.getMimeTypeFromExtension(ext);

I usually use the combination of both methods (use the pre Gingerbread version if the first approach fails).

You can use: intent.setType("audio/*"); instead of intent.setType("music/*");

Then you can choose a track, not a playlist.

Could you find a way to choose a playlist? I have the same problem, looking for a way to open and choose a playlist.