How to fix 'Permission denied'?

Question

I'm trying to save my bitmap to a file, but the android studio throws an exception java.io.FileNotFoundException: /storage/emulated/0/Pictures/savedBitmap.png (Permission denied) What am I doing wrong?

public void save(){
        File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "savedBitmap.png");
        if (file.exists()){
            Log.i(TAG, "file is exists");
        } else {
            Log.i(TAG, "file is not exists");
        }
        try {
            FileOutputStream fos = null;
            try {
                fos = new FileOutputStream(file);
                mBitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
            } finally {
                if (fos != null) fos.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    2019-04-30 13:03:03.058 22470-22470/com.example.paint I/PaintView: file is not exists
    2019-04-30 13:03:03.059 22470-22470/com.example.paint W/System.err: java.io.FileNotFoundException: /storage/emulated/0/Pictures/savedBitmap.png (Permission denied)

have you added android.permission.WRITE_EXTERNAL_STORAGE permission to you AnroidManifest.xml ? — Developer, Apr 30 '19 at 09:18

Karthik Pai · Accepted Answer · 2019-05-01T08:39:19.450

You need to first add android.permission.WRITE_EXTERNAL_STORAGE and android.permission.READ_EXTERNAL_STORAGE permission to your AndroidManifest.xml. Then programmaticaly you need to check whether these permissions are enabled in your activity's onCreate() method. You can do it as follows.

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

        List<Integer> lPermission = new ArrayList<>();
        List<String> stringPermissionList1 = getPermissionList();
        for (int i = 0; i < stringPermissionList1.size(); i++) {
            lPermission.add(ContextCompat.checkSelfPermission(activity, stringPermissionList1.get(i)));
        }
        boolean bPermissionDenied = false;
        for (int i = 0; i < lPermission.size(); i++) {
            int a = lPermission.get(i);
            if (PackageManager.PERMISSION_DENIED == a) {
                bPermissionDenied = true;
                break;
            }
        }


        if (bPermissionDenied) {


            String sMessage = "Please allow all permissions shown in upcoming dialog boxes, so that app functions properly";
   //make request to the user         
List<String> stringPermissionList = getPermissionList();
            String[] sPermissions = stringPermissionList.toArray(new String[stringPermissionList.size()]);

            //request the permissions
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                requestPermissions(sPermissions, PERMISSION_REQUEST_CODE);
            }
        } else {
           doFurtherProcessing();
        }


    } else {
      doFurtherProcessing();

    }
}



private List<String> getPermissionList(){
    List<String> stringPermissionList=new ArrayList<>();

 stringPermissionList.add(Manifest.permission.READ_EXTERNAL_STORAGE);
    stringPermissionList.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
    return  stringPermissionList;
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        boolean isAllPermissionGranted = true;

        for (int i = 0; i < grantResults.length; i++) {
            int iPermission = grantResults[i];
            if (iPermission == PackageManager.PERMISSION_DENIED) {
                isAllPermissionGranted = false;
                break;
            }
        }
        if (isAllPermissionGranted) {
            doFurtherProcessing();
        } else {
            // Prompt the user to grant all permissions
        }

}

Hope this helps

The method doFurtherProcessing () should be written by you. I have written the code so that the program makes a request to the user to grant permissions for reading and writing to external storage. After user grants it, doFurtherProcessing () method gets called in my program. You have to write all the code that gets processed after recieving permissions in doFurtherProcessing () method. — Karthik Pai, May 01 '19 at 08:29

score 2 · Answer 2 · answered Apr 30 '19 at 09:20

2

You have to use WRITE_EXTERNAL_STORAGE permission

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

Runtime Permission

if (ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE)
                        != PackageManager.PERMISSION_GRANTED) {

                    Toast.makeText(context, " Allow the Storage Permission", Toast.LENGTH_LONG).show();
                    ActivityCompat.requestPermissions((Activity) context,
                            new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                            MY_PERMISSIONS_CONSTANT);
                    return false;
}

answered Apr 30 '19 at 09:20

Aabauser

533
1
4
17

I'm use WRITE_EXTERNAL_STORAGE permission – Кирилл Балашов Apr 30 '19 at 09:23
What does this code do and where to insert it? – Кирилл Балашов Apr 30 '19 at 09:24
1

Since Marshmallow, Android needs to seek permission from the user explicitly, whether the app should use the permission or not. Such permissions are called Dangerous permissions.Please google on "Dangerous permissions" for android. And how to enable them. – Karthik Pai Apr 30 '19 at 09:56

How to fix 'Permission denied'?

2 Answers2