我在清单中添加了对外部存储设备进行写访问的权限,并在我的Android手机中授予了这些权限。我什至在执行时要求它们是否不存在。
但是,我总是会遇到此异常:
java.io.FileNotFoundException:/ storage / emulated / 03b3d97bd-5186-4506-97dc-9994b7ce0761(权限被拒绝)
您知道为什么吗?
try {
if (Build.VERSION.SDK_INT >= 23) {
int permissionCheck = ContextCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
}
}
OutputStream output = new FileOutputStream(Environment.getExternalStorageDirectory() + image_uuid);
byte[] buffer = new byte[1024];
int bytesRead;
BitmapDrawable bitmapDrawable = (BitmapDrawable) temp.getDrawable();
etc. etc. etc.
在清单文件中:
</application>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
答案 0 :(得分:3)
您需要先在SD卡中写入文件,然后才能使用以下代码来等待授予权限的结果:
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE/*1 in here*/: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted
// write file here
} else {
// permission denied
}
return;
}
// other 'case' lines to check for other
// permissions this app might request.
}
}
请参阅here