我想在MediaStore中为相册更新/插入新图像,但我无法让它工作..
这是我的代码：
public void updateAlbumImage(String path,int albumID) {
ContentValues values = new ContentValues();
values.put(MediaStore.Audio.Albums.ALBUM_ART,path);
int n = contentResolver.update(MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI,values,MediaStore.Audio.Albums.ALBUM_ID + "=" + albumID,null);
Log.e(TAG,"updateAlbumImage(" + path + "," + albumID + "): " + n);
}
错误是：
03-24 03:09:46.323: ERROR/AndroidRuntime(5319): java.lang.UnsupportedOperationException: Unknown or unsupported URL: content://media/external/audio/albums 03-24 03:09:46.323: ERROR/AndroidRuntime(5319): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:131) 03-24 03:09:46.323: ERROR/AndroidRuntime(5319): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:111) 03-24 03:09:46.323: ERROR/AndroidRuntime(5319): at android.content.ContentProviderProxy.update(ContentProviderNative.java:405) 03-24 03:09:46.323: ERROR/AndroidRuntime(5319): at android.content.ContentResolver.update(ContentResolver.java:554) 03-24 03:09:46.323: ERROR/AndroidRuntime(5319): at com.liviu.app.smpp.managers.AudioManager.updateAlbumImage(AudioManager.java:563) 03-24 03:09:46.323: ERROR/AndroidRuntime(5319): at com.liviu.app.smpp.ShowAlbumsActivity.saveImageFile(ShowAlbumsActivity.java:375) 03-24 03:09:46.323: ERROR/AndroidRuntime(5319): at com.liviu.app.smpp.ShowAlbumsActivity.onClick(ShowAlbumsActivity.java:350)
谢谢！
解决方法
看这篇文章：
你需要的是这里：
ContentResolver res = context.getContentResolver();
Uri uri = ContentUris.withAppendedId(sArtworkUri,album_id);
if (uri != null) {
InputStream in = null;
try {
in = res.openInputStream(uri);
return BitmapFactory.decodeStream(in,null,sBitmapOptions);
} catch (FileNotFoundException ex) {
// The album art thumbnail does not actually exist. Maybe the user deleted it,or
// maybe it never existed to begin with.
Bitmap bm = getArtworkFromFile(context,album_id);
if (bm != null) {
// Put the newly found artwork in the database.
// Note that this shouldn't be done for the "unknown" album,// but if this method is called correctly,that won't happen.
// first write it somewhere
String file = Environment.getExternalStorageDirectory()
+ "/albumthumbs/" + String.valueOf(System.currentTimeMillis());
if (ensureFileExists(file)) {
try {
OutputStream outstream = new FileOutputStream(file);
if (bm.getConfig() == null) {
bm = bm.copy(Bitmap.Config.RGB_565,false);
if (bm == null) {
return getDefaultArtwork(context);
}
}
boolean success = bm.compress(Bitmap.CompressFormat.JPEG,75,outstream);
outstream.close();
if (success) {
ContentValues values = new ContentValues();
values.put("album_id",album_id);
values.put("_data",file);
Uri newuri = res.insert(sArtworkUri,values);
if (newuri == null) {
// Failed to insert in to the database. The most likely
// cause of this is that the item already existed in the
// database,and the most likely cause of that is that
// the album was scanned before,but the user deleted the
// album art from the sd card.
// We can ignore that case here,since the media provider
// will regenerate the album art for those entries when
// it detects this.
success = false;
}
}
if (!success) {
File f = new File(file);
f.delete();
}
} catch (FileNotFoundException e) {
Log.e(TAG,"error creating file",e);
} catch (IOException e) {
Log.e(TAG,e);
}
}
} else {
bm = getDefaultArtwork(context);
}
return bm;
} finally {
try {
if (in != null) {
in.close();
}
} catch (IOException ex) {
}
}
}
