bug现象
进入音乐APP，点击艺术家Tab页中专辑项目下歌曲信息，自动跳转至正在扫描SD卡，一直卡在扫描界面，无法退出
解决办法
对比 9.0 看了之前的效果是点击歌曲信息后就跳转至歌曲详情界面 TrackBrowserActivity，再点击条目就直接播放了
操作效果和从专辑Tab页中点击歌曲跳转流程一样，10.0 中专辑Tab页点击歌曲跳转也正常，那么解决思路就是我们在
艺术家Tab中点击时也跳到 TrackBrowserActivity 界面就好了，不去进行扫描操作。后来分析日志发现，一直在扫描是
因为数据库查不到对应的 albumId
vendor\mediatek\proprietary\packages\apps\Music\src\com\android\music\AlbumBrowserActivity.java
专辑 Tab 页 AlbumBrowserActivity 中条目点击事件
@Override protected void onListItemClick(ListView l, View v, int position, long id) { Intent intent = new Intent(Intent.ACTION_PICK); intent.setDataAndType(Uri.EMPTY, "vnd.android.cursor.dir/track"); intent.putExtra("album", Long.valueOf(id).toString()); intent.putExtra("artist", mArtistId); android.util.Log.e("ccm","album="+Long.valueOf(id).toString()); android.util.Log.e("ccm","artist="+mArtistId); startActivity(intent); }
对应歌曲专辑id为1，艺术家id为null
2020-07-10 16:55:38.753 3835-3835/com.android.music V/MusicBrowser: onPageSelected-position:1 2020-07-10 16:55:38.755 3835-3835/com.android.music V/MusicBrowser: onTabChanged-tabId:Album 2020-07-10 16:55:41.052 3835-3835/com.android.music E/ccm: album=1 2020-07-10 16:55:41.052 3835-3835/com.android.music E/ccm: artist=null 2020-07-10 16:55:41.075 3835-3835/com.android.music V/MusicBrowser: onPause 2020-07-10 16:55:41.075 3835-3835/com.android.music D/Album: onPause 2020-07-10 16:55:41.076 3835-3835/com.android.music D/Artist/Album: onPause 2020-07-10 16:55:41.131 3835-3835/com.android.music V/MusicUtils: bindToService: activity=com.android.music.TrackBrowserActivity@d626e0 2020-07-10 16:55:41.137 3835-3835/com.android.music V/TrackBrowser: setAlbumArtBackground: mAlbumId = 1, mAlbumArtBitmap = null 2020-07-10 16:55:41.138 3835-3884/com.android.music V/MusicUtils: >> getArtWork, song_id=-1, album_id=1 2020-07-10 16:55:41.139 3835-3835/com.android.music V/TrackBrowser: starting query 2020-07-10 16:55:41.152 3835-3835/com.android.music V/TrackBrowser: onResume>>>
vendor\mediatek\proprietary\packages\apps\Music\src\com\android\music\ArtistAlbumBrowserActivity.java
艺术家 Tab 页 ArtistAlbumBrowserActivity 中条目点击事件
@Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { mCurrentAlbumId = Long.valueOf(id).toString(); Intent intent = new Intent(Intent.ACTION_PICK); intent.setDataAndType(Uri.EMPTY, "vnd.android.cursor.dir/track"); intent.putExtra("album", mCurrentAlbumId); Cursor c = (Cursor) getExpandableListAdapter().getChild(groupPosition, childPosition); String album = c.getString(c.getColumnIndex(MediaStore.Audio.Albums.ALBUM)); if (album == null || album.equals(MediaStore.UNKNOWN_STRING)) { // unknown album, so we should include the artist ID to limit //the songs to songs only by that artist mArtistCursor.moveToPosition(groupPosition); mCurrentArtistId = mArtistCursor.getString( mArtistCursor.getColumnIndex(MediaStore.Audio.Artists._ID)); intent.putExtra("artist", mCurrentArtistId); } android.util.Log.e("ccm","album11="+mCurrentArtistId); android.util.Log.e("ccm","artist11="+artistId); startActivity(intent); return true; }
同一首歌曲对应专辑id为16，艺术家id为1
2020-07-10 17:22:57.716 3413-3413/com.android.music V/MusicBrowser: Sdcard normal 2020-07-10 17:22:57.717 3413-3413/com.android.music V/MusicUtils: updateNowPlaying: activity = com.android.music.MusicBrowserActivity@c269a68, orientaiton = 2 2020-07-10 17:23:17.717 3413-3413/com.android.music E/ccm: album11=16 2020-07-10 17:23:17.717 3413-3413/com.android.music E/ccm: artist11=1 2020-07-10 17:23:17.736 3413-3413/com.android.music V/MusicBrowser: onPause 2020-07-10 17:23:17.737 3413-3413/com.android.music D/Artist/Album: onPause 2020-07-10 17:23:17.738 3413-3413/com.android.music D/Album: onPause 2020-07-10 17:23:17.792 3413-3413/com.android.music V/TrackBrowser: setAlbumArtBackground: mAlbumId = 16, mAlbumArtBitmap = null 2020-07-10 17:23:17.794 3413-3506/com.android.music V/MusicUtils: >> getArtWork, song_id=-1, album_id=16 2020-07-10 17:23:17.796 3413-3413/com.android.music V/TrackBrowser: starting query 2020-07-10 17:23:17.802 3413-3413/com.android.music V/TrackBrowser: onResume>>>
明明是同一首歌啊，为啥 albumId 不一样，那不行我得让它一样，明显是艺术家id 和专辑id 对调了。
修改后如下,只需保证 albumId 是正确的， artistId 为 null 就行
@Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { mCurrentAlbumId = Long.valueOf(id).toString(); String artistId = null; Intent intent = new Intent(Intent.ACTION_PICK); intent.setDataAndType(Uri.EMPTY, "vnd.android.cursor.dir/track"); //intent.putExtra("album", mCurrentAlbumId);//annotaion for artist id isn't correct Cursor c = (Cursor) getExpandableListAdapter().getChild(groupPosition, childPosition); String album = c.getString(c.getColumnIndex(MediaStore.Audio.Albums.ALBUM)); if (true || album == null || album.equals(MediaStore.UNKNOWN_STRING)) { // unknown album, so we should include the artist ID to limit //the songs to songs only by that artist mArtistCursor.moveToPosition(groupPosition); mCurrentArtistId = mArtistCursor.getString( mArtistCursor.getColumnIndex(MediaStore.Audio.Artists._ID)); //intent.putExtra("artist", mCurrentArtistId); intent.putExtra("artist", artistId); intent.putExtra("album", mCurrentArtistId); } android.util.Log.e("ccm","album11="+mCurrentArtistId); android.util.Log.e("ccm","artist11="+artistId); startActivity(intent); return true; }
##########最新补充
当app为竖屏进入时，没有歌曲的情况下进去，还是会一直显示正在扫描sd 卡？
修正bug，因为竖屏和横屏布局文件确实不太一样。
vendor\mediatek\proprietary\packages\apps\Music\res\layout\media_picker_activity.xml
注释这个就行 <include layout="@layout/emptyfile" />
具体原因横屏时 scanView 为 null， 所以没bug
vendor\mediatek\proprietary\packages\apps\Music\src\com\android\music\MusicUtils.java
/** * M: when listview empty,show emptyview,and * if when Sdcard is not ready,show scanning view. * @param list This listview will show emptyview. * @param a the Activity the view will be showed. */ static void emptyShow(ListView list, Activity a) { if (list.getCount() == 0) { View scanView = a.findViewById(R.id.scan); if(scanView != null){ scanView.setVisibility(View.VISIBLE);
