问题
I want to display album art with album name in listview. But i am not getting the way to display album art. I have tried from cover art on android.
Here is my Code :
Cursor cursor = managedQuery(MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI, null, null, null, null);
if (cursor == null)
{
//Query Failed , Handle error.
}
else if (!cursor.moveToFirst())
{
//No media on the device.
}
else
{
int titleColumn = cursor.getColumnIndex(android.provider.MediaStore.Audio.Albums.ALBUM_ART);
int id = cursor.getColumnIndex(android.provider.MediaStore.Audio.Albums.ALBUM_ID); //here value i m getting -1 .
for(int i=0;i<cursor.getCount();i++)
{
if(id<0)
{
Long album =Long.parseLong(cursor.getString(id));
String coverPath = cursor.getString(titleColumn);
Context context = null;
ContentResolver res = context.getContentResolver();
Uri uri = ContentUris.withAppendedId(sArtworkUri, album);
if (uri != null)
{
InputStream in = null;
try
{
in = res.openInputStream(uri);
Bitmap b = BitmapFactory.decodeStream(in, null, sBitmapOptions);
ImageView coverAlbum=(ImageView)findViewById(R.id.thumbnail);
coverAlbum.setImageBitmap(b);
} catch (FileNotFoundException ex)
{
}
}
}
//code to insert in listview
cursor.moveToNext();
}
}
cursor.close();
}
But i am getting the album_id -1. So i am not getting album_id for album but i am having album song in my sdcard. And sdcard is having folder like albumthums which includes some files. So please give me solution to get album name and art. Thanx in Advance.
This is my error log :
12-03 15:19:22.051: WARN/System.err(32334): java.lang.NullPointerException
12-03 15:19:22.060: WARN/System.err(32334): at com.mnp.AlbumList.onCreate(AlbumList.java:59)
12-03 15:19:22.120: WARN/System.err(32334): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-03 15:19:22.130: WARN/System.err(32334): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
12-03 15:19:22.140: WARN/System.err(32334): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
12-03 15:19:22.161: WARN/System.err(32334): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
12-03 15:19:22.171: WARN/System.err(32334): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
12-03 15:19:22.180: WARN/System.err(32334): at android.os.Handler.dispatchMessage(Handler.java:99)
12-03 15:19:22.201: WARN/System.err(32334): at android.os.Looper.loop(Looper.java:123)
12-03 15:19:22.210: WARN/System.err(32334): at android.app.ActivityThread.main(ActivityThread.java:4363)
12-03 15:19:22.220: WARN/System.err(32334): at java.lang.reflect.Method.invokeNative(Native Method)
12-03 15:19:22.240: WARN/System.err(32334): at java.lang.reflect.Method.invoke(Method.java:521)
12-03 15:19:22.250: WARN/System.err(32334): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
12-03 15:19:22.260: WARN/System.err(32334): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
12-03 15:19:22.270: WARN/System.err(32334): at dalvik.system.NativeStart.main(Native Method)
回答1:
use Below Code to get album art with song information. you can change slightly to display only album names instead of songs list.
public class BrowseAudioActivity extends Activity implements
AppConstants {
private Context context;
private ArrayList<AudioListModel> audioArrayList = new ArrayList<AudioListModel>();
private AudioListAdapter audioListAdapter;
private ListView audioListView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
setContentView(R.layout.audio_list);
UtilityClass.addActivityToStack(this);
context = this;
audioListView = (ListView) findViewById(R.id.list_audio);
new GetAudioListAsynkTask(context).execute((Void) null);
}
private void initLayout() {
final Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
final String[] cursor_cols = { MediaStore.Audio.Media._ID,
MediaStore.Audio.Media.ARTIST, MediaStore.Audio.Media.ALBUM,
MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.DATA,
MediaStore.Audio.Media.ALBUM_ID,
MediaStore.Audio.Media.DURATION };
final String where = MediaStore.Audio.Media.IS_MUSIC + "=1";
final Cursor cursor = context.getContentResolver().query(uri,
cursor_cols, where, null, null);
while (cursor.moveToNext()) {
String artist = cursor.getString(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST));
String album = cursor.getString(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM));
String track = cursor.getString(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));
String data = cursor.getString(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
Long albumId = cursor.getLong(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM_ID));
int duration = cursor.getInt(cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION));
Uri sArtworkUri = Uri
.parse("content://media/external/audio/albumart");
Uri albumArtUri = ContentUris.withAppendedId(sArtworkUri, albumId);
Logger.debug(albumArtUri.toString());
Bitmap bitmap = null;
try {
bitmap = MediaStore.Images.Media.getBitmap(
context.getContentResolver(), albumArtUri);
bitmap = Bitmap.createScaledBitmap(bitmap, 30, 30, true);
} catch (FileNotFoundException exception) {
exception.printStackTrace();
bitmap = BitmapFactory.decodeResource(context.getResources(),
R.drawable.audio_file);
} catch (IOException e) {
e.printStackTrace();
}
AudioListModel audioListModel = new AudioListModel();
audioListModel.setArtist(artist);
audioListModel.setBitmap(bitmap);
audioListModel.setAlbum(album);
audioListModel.setTrack(track);
audioListModel.setData(data);
audioListModel.setAlbumId(albumId);
audioListModel.setDuration(duration);
audioListModel.setAlbumArtUri(albumArtUri);
audioArrayList.add(audioListModel);
}
}
public String getRealPathFromURI(Uri contentUri) {
String[] proj = { MediaStore.Images.Media.DATA };
Cursor cursor = context.getContentResolver().query(contentUri, proj,
null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
private class GetAudioListAsynkTask extends AsyncTask<Void, Void, Boolean> {
private Context context;
private CustomProgressDialog progressDialog;
public GetAudioListAsynkTask(Context context) {
this.context = context;
}
@Override
protected void onPreExecute() {
progressDialog = new CustomProgressDialog(context,
AUDIO_LOADING_HEADING, AUDIO_LOADING_MSG);
progressDialog.setCancelable(false);
progressDialog.show();
super.onPreExecute();
}
@Override
protected Boolean doInBackground(Void... params) {
try {
initLayout();
return true;
} catch (Exception e) {
return false;
}
}
@Override
protected void onPostExecute(Boolean result) {
progressDialog.dismiss();
audioListAdapter = new AudioListAdapter(context, audioArrayList);
audioListView.setAdapter(audioListAdapter);
audioListView
.setOnItemClickListener(new AudioListItemClickListener(
context, audioArrayList));
}
}
@Override
protected void onPause() {
super.onPause();
overridePendingTransition(0, 0);
}
@Override
protected void onDestroy() {
super.onDestroy();
UtilityClass.removeActivityOnFinish(this);
}
@Override
public void onBackPressed() {
super.onBackPressed();
finish();
}
}
回答2:
Very Simple code to get ALBUM_ART. Always remember you should have read storage permission.
final Uri uri = MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI;
final Cursor cursor = getContentResolver().query(uri, null, null, null, null);
while (cursor.moveToNext()) {
final String artist = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.ARTIST));
final String album = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.ALBUM));
final String albumart = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.ALBUM_ART));
arrayList.add(artist);
}
来源：https://stackoverflow.com/questions/13678391/get-album-art-with-album-name-android