Android上的异常“打开失败:EACCES(权限被拒绝)”

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();
}

当前回答

将此添加到清单，但此权限具有谷歌播放策略。

<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>

2022-07-12 10:09:13

其他回答

在manifest中添加权限。

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

2016-10-21 09:53:03

如果你有一个根设备，可以通过以下adb命令绕过6.0后的存储权限强制执行:

root@msm8996:/ # getenforce
getenforce
Enforcing
root@msm8996:/ # setenforce 0
setenforce 0
root@msm8996:/ # getenforce
getenforce
Permissive

2016-04-07 01:22:39

Android 10 (API 29)引入了作用域存储。更改清单以请求遗留存储并不是长期解决方案。

当我用context.getExternalFilesDir(null)替换我以前的Environment.getExternalStorageDirectory()实例(API 29已弃用)时，我修复了这个问题。

注意，如果存储位置不可用，context.getExternalFilesDir(type)可以返回null，因此无论何时检查是否具有外部权限，都要检查这一点。

点击这里阅读更多。

2019-10-21 15:05:21

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();
        }
    });
}

2021-11-29 07:47:54

添加gradle依赖项

implementation 'com.karumi:dexter:4.2.0'

在主活动中添加以下代码。

import com.karumi.dexter.Dexter;
import com.karumi.dexter.MultiplePermissionsReport;
import com.karumi.dexter.PermissionToken;
import com.karumi.dexter.listener.PermissionRequest;
import com.karumi.dexter.listener.multi.MultiplePermissionsListener;
    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);

    new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {


                checkMermission();
            }
        }, 4000);
    }

    private void checkMermission(){
        Dexter.withActivity(this)
                .withPermissions(
                        android.Manifest.permission.READ_EXTERNAL_STORAGE,
                        android.Manifest.permission.WRITE_EXTERNAL_STORAGE,
                        android.Manifest.permission.ACCESS_NETWORK_STATE,
                        Manifest.permission.INTERNET
                ).withListener(new MultiplePermissionsListener() {
            @Override
            public void onPermissionsChecked(MultiplePermissionsReport report) {
                if (report.isAnyPermissionPermanentlyDenied()){
                    checkMermission();
                } else if (report.areAllPermissionsGranted()){
                    // copy some things
                } else {
                    checkMermission();
                }

            }
            @Override
            public void onPermissionRationaleShouldBeShown(List<PermissionRequest> permissions, PermissionToken token) {
                token.continuePermissionRequest();
            }
        }).check();
    }

2018-04-08 17:06:44

Android上的异常“打开失败:EACCES(权限被拒绝)”

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