How to ask multiple permissions at same time in Android Marshmelllow

Question

Following code having multiple permissions, My error is when ever onclick button it asking only one permission, and again i click means it asking another permission.

My Onclick

            public void onClick(View v) {
            getPermissionCamara();
            getStroagePermission();
            selectImage();
         }

My permissions are like this

                private static final int CAMERA_PERMISSIONS_REQUEST = 1;
private static final int STROAGE_PERMISSIONS_REQUEST = 2;
public void getPermissionCamara() {
    if (ContextCompat.checkSelfPermission(this, CAMERA)
            != PackageManager.PERMISSION_GRANTED) {
        if (shouldShowRequestPermissionRationale(
                CAMERA)) {


        }
        requestPermissions(new String[]{CAMERA},CAMERA_PERMISSIONS_REQUEST);
    }
}


public void getStroagePermission() {
    if (ContextCompat.checkSelfPermission(this,READ_EXTERNAL_STORAGE)
            != PackageManager.PERMISSION_GRANTED) {
        if (shouldShowRequestPermissionRationale(
                READ_EXTERNAL_STORAGE)) {


        }
        requestPermissions(new String[]{READ_EXTERNAL_STORAGE},STROAGE_PERMISSIONS_REQUEST);
    }
}

@Override
public void onRequestPermissionsResult(int requestCode,
                                       @NonNull String permissions[],
                                       @NonNull int[] grantResults) {
    // Make sure it's our original READ_CONTACTS request
    if (requestCode == CAMERA_PERMISSIONS_REQUEST) if (grantResults.length == 1 &&
            grantResults[0] == PackageManager.PERMISSION_GRANTED) {
        Toast.makeText(this, "Camera permission granted", Toast.LENGTH_SHORT).show();
    }
    else if (requestCode == STROAGE_PERMISSIONS_REQUEST) if (grantResults.length == 2 &&
            grantResults[0] == PackageManager.PERMISSION_GRANTED) {
        Toast.makeText(this, "Read Contacts permission granted", Toast.LENGTH_SHORT).show();
    }
    }

Answer 1

requestPermissions(new String[]{
                                Manifest.permission.READ_CONTACTS,
                                Manifest.permission.ACCESS_FINE_LOCATION},
                        ASK_MULTIPLE_PERMISSION_REQUEST_CODE);

Answer 2

I have done it this way:

public static final int MULTIPLE_PERMISSION_REQUEST = 43;

public boolean requestPermission(String... permissions) {
    final List<String> permissionsList = new ArrayList<>();

    for (String perm : permissions) {
        addPermission(permissionsList, perm);
    }

    if (permissionsList.size() > 0) {
        if (Utils.hasMarshmallow())
            requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
                    MULTIPLE_PERMISSION_REQUEST);
        else
            ActivityCompat.requestPermissions(this, permissionsList.toArray(new String[permissionsList.size()]),
                    MULTIPLE_PERMISSION_REQUEST);
        return false;
    } else
        return true;
}

private boolean addPermission(List<String> permissionsList, String permission) {
    if (ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {
        permissionsList.add(permission);
        // Check for Rationale Option
        if (Utils.hasMarshmallow())
            if (!shouldShowRequestPermissionRationale(permission))
                return false;
    }
    return true;
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
    /*switch (requestCode) {
        case PERMISSION_REQUEST:
        case MULTIPLE_PERMISSION_REQUEST: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // permission was granted, yay! Do the
                // task you need to do.
            } else {
                // permission denied, boo! Disable the
                // functionality that depends on this permission.
            }
        }
    }*/
}