MediaStore.Audio.Media.DATA 可以抛出无效路径吗？
[英]Can MediaStore.Audio.Media.DATA throw an invalid path?
问题描述
So, I have some code like this:
所以，我有一些这样的代码：
String thisPath = cursor.getString(pathColumn);
MediaMetadataRetriever mmr = new MediaMetadataRetriever();
mmr.setDataSource(thisPath);
byte[] data = mmr.getEmbeddedPicture();
if (data != null) {
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
} else {
bitmap = null;
}
Everything was working fine, until I started getting a java.lang.IllegalArgumentException in the setDataSource() line, after some digging around I got to the conclusion that the path returned from the cursor using int pathColumn = cursor.getColumnIndex(MediaStore.Audio.Media.DATA) was pointing to a file that's no longer in that location, I think that's what's causing the issue.一切正常，直到我开始在setDataSource()行中获取java.lang.IllegalArgumentException ，经过一番挖掘后，我得出结论，使用int pathColumn = cursor.getColumnIndex(MediaStore.Audio.Media.DATA)指向的文件不再位于该位置，我认为这就是导致问题的原因。
Invalid path: "/storage/emulated/0/zedge/.../Alarm_Clock.mp3"
I have set the Storage permissions already, and it works for the rest of the files I'm looking for, I don't even know how I'm getting that path, since there's no file there.我已经设置了存储权限，它适用于我正在寻找的其余文件，我什至不知道我是如何获得该路径的，因为那里没有文件。
Can anyone help?任何人都可以帮忙吗？
Cheers,干杯，
EDIT:编辑：
thisPath is actually just a String thisPath 实际上只是一个字符串
String thisPath = musicCursor.getString(pathColumn);
But pathColumn is initilized here:但是 pathColumn 在这里初始化：
ContentResolver contentResolver = getContentResolver();
Uri uri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Cursor cursor = contentResolver.query(uri, null, null, null, null);
if (cursor != null && cursor.moveToFirst()) {
int pathColumn = cursor.getColumnIndex(MediaStore.Audio.Media.DATA);
do {
String thisPath = cursor.getString(pathColumn);
MediaMetadataRetriever mmr = new MediaMetadataRetriever();
mmr.setDataSource(thisPath);
byte[] data = mmr.getEmbeddedPicture();
if (data != null) {
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
} else {
bitmap = null;
}
songList.add(new Song(thisId, thisTitle, thisArtist, thisAlbum, bitmap));
} while (cursor.moveToNext());
StackTrace:堆栈跟踪：
05-15 13:55:50.181 3616-3616/com.bot.lit E/AndroidRuntime: FATAL EXCEPTION: main Process: com.bot.lit, PID: 3616 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bot.lit/com.bot.lit.MainActivity}: java.lang.IllegalArgumentException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2606) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2672) at android.app.ActivityThread.access$1100(ActivityThread.java:180) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1517) at android.os.Handler.dispatchMessage(Handler.java:111) at android.os.Looper.loop(Looper.java:207) at android.app.ActivityThread.main(ActivityThread.java:5856) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:933) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782) Caused by: java.lang.IllegalArgumentException at android.media.MediaMetadataRetriever.setDataSo
1 个解决方案
解决方案1
0 已采纳 2018-05-15 13:07:22
I got to the conclusion that the path returned from the cursor using
int pathColumn = cursor.getColumnIndex(MediaStore.Audio.Media.DATA)was pointing to a file that's no longer in that locationint pathColumn = cursor.getColumnIndex(MediaStore.Audio.Media.DATA)从光标返回的路径指向的文件不再位于该位置
That is entirely possible, as the MediaStore index may be out of date.这是完全可能的，因为MediaStore索引可能已过时。 It is also possible that DATA points to something for which you do not have read access. DATA也可能指向您无权读取的内容。 I believe there are scenarios in which DATA is null .我相信在某些情况下DATA为null 。
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