Android example for code that needs to change settings (Manifest.permission.WRITE_SETTINGS), targetSdkVersion >= 23

GestureMediaPlayerActivity.java

/**
 * Created by spandhare on 11/3/16.
 */

import com.malmstein.fenster.controller.FensterPlayerControllerVisibilityListener;
import com.malmstein.fenster.play.FensterVideoFragment;

import android.Manifest;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Settings;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;

import permissions.dispatcher.NeedsPermission;
import permissions.dispatcher.RuntimePermissions;

@RuntimePermissions
public class GestureMediaPlayerActivity extends AppCompatActivity implements FensterPlayerControllerVisibilityListener {

    Intent starterintent;
    private static final int CODE_WRITE_SETTINGS_PERMISSION = 111;
    boolean flag_is_permission_set = false;

    @Override
    @NeedsPermission(Manifest.permission.WRITE_SETTINGS)
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        starterintent = getIntent();
        if (!Settings.System.canWrite(this)) {
            flag_is_permission_set = false;
            Intent intent = new Intent(android.provider.Settings.ACTION_MANAGE_WRITE_SETTINGS);
            intent.setData(Uri.parse("package:" + this.getPackageName()));
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivityForResult(intent, GestureMediaPlayerActivity.CODE_WRITE_SETTINGS_PERMISSION);
        } else {
            flag_is_permission_set = true;
            setContentView(R.layout.activity_gesture_media_player);
            initVideo();
        }
    }
    
    private void initVideo(){
        findVideoFragment().setVisibilityListener(this);
        findVideoFragment().playExampleVideo();
    }

    private FensterVideoFragment findVideoFragment(){
        return (FensterVideoFragment) getFragmentManager().findFragmentById(R.id.play_demo_fragment);
    }

    @Override
    public void onControlsVisibilityChange(boolean value) {

        if (flag_is_permission_set) {
            setSystemUiVisibility(value);
        }
    }

    private void setSystemUiVisibility(final boolean visible) {
        int newVis = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;

        if (!visible) {
            newVis |= View.SYSTEM_UI_FLAG_LOW_PROFILE
                    | View.SYSTEM_UI_FLAG_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
        }

        final View decorView = getWindow().getDecorView();
        decorView.setSystemUiVisibility(newVis);
        decorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
            @Override
            public void onSystemUiVisibilityChange(final int visibility) {
                if ((visibility & View.SYSTEM_UI_FLAG_LOW_PROFILE) == 0) {
                    findVideoFragment().showFensterController();
                }
            }
        });
    }
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == CODE_WRITE_SETTINGS_PERMISSION && Settings.System.canWrite(this)){
            Log.d("TAG", "CODE_WRITE_SETTINGS_PERMISSION success");
            finish();
            startActivity(starterintent);
        }
    }
}