我得到了
open failed: EACCES(权限被拒绝)
myOutput = new FileOutputStream(outFileName);
我检查了根目录，并尝试了android.permission.WRITE_EXTERNAL_STORAGE。
我该如何解决这个问题?
try {
InputStream myInput;
myInput = getAssets().open("XXX.db");
// Path to the just created empty db
String outFileName = "/data/data/XX/databases/"
+ "XXX.db";
// Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
// Transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer)) > 0) {
myOutput.write(buffer, 0, length);
}
// Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
buffer = null;
outFileName = null;
}
catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
我在小米设备(android 10)上也遇到了同样的错误。下面的代码解决了我的问题。
图书馆:Dexter(https://github.com/Karumi/Dexter)和Image picker(https://github.com/Dhaval2404/ImagePicker)
添加manifest (android:requestLegacyExternalStorage="true")
public void showPickImageSheet(AddImageModel model) {
BottomSheetHelper.showPickImageSheet(this, new BottomSheetHelper.PickImageDialogListener() {
@Override
public void onChooseFromGalleryClicked(Dialog dialog) {
selectedImagePickerPosition = model.getPosition();
Dexter.withContext(OrderReviewActivity.this) .withPermissions(Manifest.permission.READ_EXTERNAL_STORAGE)
.withListener(new MultiplePermissionsListener() {
@Override
public void onPermissionsChecked(MultiplePermissionsReport report) {
if (report.areAllPermissionsGranted()) {
ImagePicker.with(OrderReviewActivity.this)
.galleryOnly()
.compress(512)
.maxResultSize(852,480)
.start();
}
}
@Override
public void onPermissionRationaleShouldBeShown(List<PermissionRequest> list, PermissionToken permissionToken) {
permissionToken.continuePermissionRequest();
}
}).check();
dialog.dismiss();
}
@Override
public void onTakePhotoClicked(Dialog dialog) {
selectedImagePickerPosition = model.getPosition();
ImagePicker.with(OrderReviewActivity.this)
.cameraOnly()
.compress(512)
.maxResultSize(852,480)
.start();
dialog.dismiss();
}
@Override
public void onCancelButtonClicked(Dialog dialog) {
dialog.dismiss();
}
});
}
谷歌在Android Q上有一个新功能:外部存储的过滤视图。一个快速的修复方法是在AndroidManifest.xml文件中添加以下代码:
<manifest ... >
<!-- This attribute is "false" by default on apps targeting Android Q. -->
<application android:requestLegacyExternalStorage="true" ... >
...
</application>
</manifest>
你可以在这里阅读更多信息:https://developer.android.com/training/data-storage/use-cases
编辑:我开始得到反对票，因为这个答案是过时的安卓11。看到答案的同学请点击上面的链接阅读说明。
