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[英]Android /storage/emulated/0 and /data/media/0 different permissions
[英]Android : unable to list /storage/emulated/0 files despite permissions
我有以下代码来处理存储权限:
private void getGalleryPermission() {
Log.d(TAG, "getGalleryPermission: checking permissions.");
String[] permissions = { WRITE_STORAGE, READ_STORAGE };
if (ContextCompat.checkSelfPermission(requireActivity(), WRITE_STORAGE) == PackageManager.PERMISSION_GRANTED) {
Log.d(TAG, "getGalleryPermission: write storage is granted.");
if (ContextCompat.checkSelfPermission(requireActivity(), READ_STORAGE) == PackageManager.PERMISSION_GRANTED) {
Log.d(TAG, "getGalleryPermission: read storage is granted.");
setupRecyclerView();
}
else {
Log.d(TAG, "getGalleryPermission: asking to read the storage.");
requestPermissions(permissions, REQUEST_STORAGE_PERMISSION_RESULT);
}
}
else {
Log.d(TAG, "getGalleryPermission: asking to write the storage.");
requestPermissions(permissions, REQUEST_STORAGE_PERMISSION_RESULT);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
Log.d(TAG, "onRequestPermissionsResult: request code " + requestCode);
if (requestCode == REQUEST_STORAGE_PERMISSION_RESULT) {
Log.d(TAG, "onRequestPermissionsResult: request code is correct.");
if (grantResults.length > 0) {
for (int grantResult : grantResults) {
if (grantResult != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(requireActivity(), "Don't have permission to access the Gallery !", Toast.LENGTH_SHORT).show();
break;
}
}
// Setup the gallery once the permissions are granted
setupRecyclerView();
}
}
}
我正在我的几部手机上测试这段代码,它运行良好。 但是,在我的华为上, listFiles()
方法在/storage/emulated/0 directory
上返回null
。
我已经检查了手机设置 + 日志,并授予了存储权限(就像在其他工作手机上一样)。
尽管授予了权限,但什么可以防止文件被读取?
在某些手机上,/storage/emulated/0 是否可能不是用于获取所有图库文件的正确目录?
PS:我已经检查了手机中文件应用程序的目录,它不是空的(DCIM 等......在里面)。
谢谢
返回null
的华为设备是运行 Android 10 吗? 从 API 29 开始,对于该路径,Android 似乎返回null
。您可能想在此处查看此问题。
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