Android 6.0 multiple permissions

Question

I know that Android 6.0 has new permissions and I know I can call them with something like this

if (ContextCompat.checkSelfPermission(this, Manifest.permiss         


        

Answer 1

This is what I have done in my activity. Hoping will be helpful. I am asking for camera and microphone permissions.

public class ActiveCallActivity extends AppCompatActivity {
    .....

    private static final String cameraPermissionKey = "cameraPermission";
    private static final String microphonePermissionkey = "microphonePermission";

    private static ArrayList<String> permissionsQueue = new ArrayList<String>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        .....
        // in ValidationCheckersAndValidators simply checking if have permission or not.
        if(ValidationCheckersAndValidators.haveCameraPermission(this)) performHaveCameraPermissionLayout(); else performHaveNoCameraPermissionLayout();
        if(ValidationCheckersAndValidators.haveMicrophonePermission(this)) performHaveMicrophonePermissionLayout(); else performHaveNoMicrophonePermissionLayout();

    }

    private void performHaveNoCameraPermissionLayout() {
        .....
        permissionsQueue.add(cameraPermissionKey);
    }

    private void performHaveNoMicrophonePermissionLayout() {
        .....
        permissionsQueue.add(microphonePermissionkey);
    }

    @Override
    protected void onResume() {
        super.onResume();

        .....
        passThroughPermissionsQueue();
    }

    private void passThroughPermissionsQueue() {
        if(!permissionsQueue.isEmpty()) {
            String permissionKey = permissionsQueue.remove(0);
            switch (permissionKey) {
                case cameraPermissionKey: {
                    ValidationCheckersAndValidators.requestForCameraPermission(this);
                    return;
                }
                case microphonePermissionkey: {
                    ValidationCheckersAndValidators.requestForMicrophonePermission(this);
                    return;
                }
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch(requestCode) {
            case cameraPermissionRequestCode: {
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    performHaveCameraPermissionLayout();
                }
                break;
            }
            case microphonePermissionRequestCode: {
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    performHaveMicrophonePermissionLayout();
                }
                break;
            }
        }
        passThroughPermissionsQueue();
    }
}

Answer 2

My handler class for request multiple permissions. You can check the full using here

public class RequestPermissionHandler {
    private Activity mActivity;
    private RequestPermissionListener mRequestPermissionListener;
    private int mRequestCode;

    public void requestPermission(Activity activity, @NonNull String[] permissions, int requestCode,
            RequestPermissionListener listener) {
        mActivity = activity;
        mRequestCode = requestCode;
        mRequestPermissionListener = listener;

        if (!needRequestRuntimePermissions()) {
            mRequestPermissionListener.onSuccess();
            return;
        }
        requestUnGrantedPermissions(permissions, requestCode);
    }

    private boolean needRequestRuntimePermissions() {
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
    }

    private void requestUnGrantedPermissions(String[] permissions, int requestCode) {
        String[] unGrantedPermissions = findUnGrantedPermissions(permissions);
        if (unGrantedPermissions.length == 0) {
            mRequestPermissionListener.onSuccess();
            return;
        }
        ActivityCompat.requestPermissions(mActivity, unGrantedPermissions, requestCode);
    }

    private boolean isPermissionGranted(String permission) {
        return ActivityCompat.checkSelfPermission(mActivity, permission)
                == PackageManager.PERMISSION_GRANTED;
    }

    private String[] findUnGrantedPermissions(String[] permissions) {
        List<String> unGrantedPermissionList = new ArrayList<>();
        for (String permission : permissions) {
            if (!isPermissionGranted(permission)) {
                unGrantedPermissionList.add(permission);
            }
        }
        return unGrantedPermissionList.toArray(new String[0]);
    }

    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
            @NonNull int[] grantResults) {
        if (requestCode == mRequestCode) {
            if (grantResults.length > 0) {
                for (int grantResult : grantResults) {
                    if (grantResult != PackageManager.PERMISSION_GRANTED) {
                        mRequestPermissionListener.onFailed();
                        return;
                    }
                }
                mRequestPermissionListener.onSuccess();
            } else {
                mRequestPermissionListener.onFailed();
            }
        }
    }

    public interface RequestPermissionListener {
        void onSuccess();

        void onFailed();
    }
}

Answer 3

Use helper like this (permissions names do not matter).

public class MyPermission {

private static final int PERMISSION_REQUEST_ALL = 127;
private MainActivity mMainActivity;

MyPermission(MainActivity mainActivity) {
    mMainActivity = mainActivity;
}

public static boolean hasPermission(String permission, Context context) {
    if (isNewPermissionModel()) {
        return (ActivityCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED);
    }
    return true;
}

private static boolean hasPermissions(Context context, String... permissions) {
    if (isNewPermissionModel() && context != null && permissions != null) {
        for (String permission : permissions) {
            if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
                return false;
            }
        }
    }
    return true;
}

private static boolean shouldShowRationale(Activity activity, String permission) {
    return isNewPermissionModel() && ActivityCompat.shouldShowRequestPermissionRationale(activity, permission);
}

private static boolean isNewPermissionModel() {
    return VERSION.SDK_INT > VERSION_CODES.LOLLIPOP_MR1;
}


/**
 * check all permissions
 */
void checkAll() {
    //check dangerous permissions, make request if need (Android will ask only for the ones it needs)
    String[] PERMISSIONS = {
            permission.READ_CALENDAR,           
            permission.ACCESS_COARSE_LOCATION   
    };

    if (!hasPermissions(mMainActivity, PERMISSIONS)) {
        ActivityCompat.requestPermissions(mMainActivity, PERMISSIONS, PERMISSION_REQUEST_ALL);
    }
}

void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    if (requestCode == PERMISSION_REQUEST_ALL) {
        if (grantResults.length > 0) {
            //for not granted
            for (int i = 0; i < permissions.length; i++) {

                if (permissions[i].equals(permission.READ_CALENDAR)) {
                    if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {
                        smartRequestPermissions(permission.READ_CALENDAR, R.string.permission_required_dialog_read_calendar);
                    }
                } else if (permissions[i].equals(permission.ACCESS_COARSE_LOCATION)) {
                    if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {
                        smartRequestPermissions(permission.ACCESS_COARSE_LOCATION, R.string.permission_required_dialog_access_coarse_location);
                    }
                }

            }
        }
    }
}

private void smartRequestPermissions(final String permissionName, int permissionRequiredDialog) {
    if (shouldShowRationale(mMainActivity, permissionName)) {// If the user turned down the permission request in the past and chose the Don't ask again option in the permission request system dialog, this method returns false.

        //Show an explanation to the user with action
        mMainActivity.mSnackProgressBarManager.show(
                new SnackProgressBar(
                        SnackProgressBar.TYPE_ACTION, mMainActivity.getString(permissionRequiredDialog)
                )
                        .setAction("OK", new OnActionClickListener() {
                            @Override
                            public void onActionClick() {
                                checkAll();
                            }
                        })
                        .setSwipeToDismiss(true).setAllowUserInput(true)
                , MainActivity.SNACKBAR_WARNING_DURATION
        );

    } // else do nothing
}

}

Answer 4

There is nothing wrong with answers asking for multiple permissions but multiple permission result code is not implemented very elegantly and may cause checking wrong permission result.

if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) is terrible logic for checking multiple permissions result, i don't know why Google implemented such a terrible code.

It's a mess especially when you check multiple permissions. Let say you ask for CAMERA, ACCESS_FINE_LOCATION and ACCESS_NETWORK_STATE.

You need to check for ACCESS_FINE_LOCATION but user only granted CAMERA at first run and you check for grantResults[1] but in second run ACCESS_FINE_LOCATION becomes the permission with index 0. I got so many problems with user not granting all permissions at once and have to write so pointless permission result logic.

You should either use

   int size = permissions.length;
    boolean locationPermissionGranted = false;

    for (int i = 0; i < size; i++) {
        if (permissions[i].equals(Manifest.permission.ACCESS_FINE_LOCATION)
                && grantResults[i] == PackageManager.PERMISSION_GRANTED) {
            locationPermissionGranted = true;
        }
    }

Or simpler one

   if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
                == PackageManager.PERMISSION_GRANTED) {
           // Do something ...
        }

in onPermissionRequestResult method.