Understanding the Android 6 permission method

Question

I am trying to take an image from Gallery and set it to an imageview but in Android 6 there are some permission problems. Below is the method to ask for the permission. Shou

Answer 1

EDIT

I have rewritted the code and posted in another answer.

Old answer:

Yes, you have to check and ask for permission every time.

Usually I write the code like this:

private int requestPermissionCode;
private Runnable requestPermissionRunnable;

private void runPermissionCode(String requestPermission, int requestCode, Runnable codeToRun) {
    if (android.os.Build.VERSION.SDK_INT >= 23) {
        if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.READ_EXTERNAL_STORAGE)
                != PackageManager.PERMISSION_GRANTED) {

            requestPermissionCode = requestCode;
            requestPermissionRunnable = codeToRun;

            requestPermissions(new String[]{requestPermission},
                    requestCode);
        }
    } else {
        codeToRun.run();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode,
                                       @NonNull String permissions[],
                                       @NonNull int[] grantResults) {
    if (requestCode == requestPermissionCode) {
        if (grantResults.length == 1 &&
                grantResults[0] == PackageManager.PERMISSION_GRANTED) {

            if (requestPermissionRunnable != null)
                requestPermissionRunnable.run();
        } else {
            Toast.makeText(getActivity(), "Permission denied", Toast.LENGTH_SHORT).show();
        }
    } else {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
}

and run it like this:

    runPermissionCode(Manifest.permission.READ_EXTERNAL_STORAGE, READ_CONTACTS_PERMISSIONS_REQUEST, new Runnable() {

        @Override
        public void run() {
            // your code here
        }
    });

I am sure it is not a best way, but at least it gives a possibility to request permission and make actions easier.