cordova-plugin-navigationbar/src/android/NavigationBar.java

//Copyright (c) 2014 Sang Ki Kwon (Cranberrygame)
//Email: cranberrygame@yahoo.com
//Homepage: http://www.github.com/cranberrygame
//License: MIT (http://opensource.org/licenses/MIT)
package com.cranberrygame.cordova.plugin.navigationbar;

import org.apache.cordova.CordovaPlugin;
import org.apache.cordova.PluginResult;
import org.apache.cordova.CallbackContext;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONException;
import org.apache.cordova.CordovaInterface;
import org.apache.cordova.CordovaWebView;
import android.annotation.TargetApi;
import android.app.Activity;
import android.os.Build;
import android.util.Log;
//
import android.view.View;
import android.os.Handler;
//
import java.lang.reflect.Method;

public class NavigationBar extends CordovaPlugin {
	private static final String LOG_TAG = "NavigationBar";

    public void initialize(CordovaInterface cordova, CordovaWebView webView) {
		super.initialize(cordova, webView);
	
    }
	
	@Override
	public boolean execute(String action, JSONArray args,CallbackContext callbackContext) throws JSONException {
		PluginResult result = null;
		
		//args.length()
		//args.getString(0)
		//args.getString(1)
		//args.getInt(0)
		//args.getInt(1)
		//args.getBoolean(0)
		//args.getBoolean(1)
		//JSONObject json = args.optJSONObject(0);
		//json.optString("adUnit")
		//json.optString("adUnitFullScreen")
		//JSONObject inJson = json.optJSONObject("inJson");
			
		if (action.equals("setUp")) {
			//Activity activity = cordova.getActivity();
			//webView
			//
			final boolean autoHideNavigationBar = args.getBoolean(0);
			
			final CallbackContext delayedCC = callbackContext;
			cordova.getActivity().runOnUiThread(new Runnable(){
				@Override
				public void run() {						
					_setUp(autoHideNavigationBar);
					
					PluginResult pr = new PluginResult(PluginResult.Status.OK);
					//pr.setKeepCallback(true);
					delayedCC.sendPluginResult(pr);
					//PluginResult pr = new PluginResult(PluginResult.Status.ERROR);
					//pr.setKeepCallback(true);
					//delayedCC.sendPluginResult(pr);					
				}
			});	
			
			return true;
		}
		else if (action.equals("hideNavigationBar")) {
			//Activity activity=cordova.getActivity();
			//webView
			//
			
			final CallbackContext delayedCC = callbackContext;
			cordova.getActivity().runOnUiThread(new Runnable(){
				@Override
				public void run() {						
					_hideNavigationBar();
					
					PluginResult pr = new PluginResult(PluginResult.Status.OK);
					//pr.setKeepCallback(true);
					delayedCC.sendPluginResult(pr);
					//PluginResult pr = new PluginResult(PluginResult.Status.ERROR);
					//pr.setKeepCallback(true);
					//delayedCC.sendPluginResult(pr);					
				}
			});	
			
			return true;
		}
				
		return false; // Returning false results in a "MethodNotFound" error.
	}
	//-------------------------------------

	@TargetApi(Build.VERSION_CODES.HONEYCOMB) 
	private void _setUp(boolean autoHideNavigationBar){
		if (autoHideNavigationBar) {
			Activity activity=cordova.getActivity();
			//http://stackoverflow.com/questions/21164836/immersive-mode-navigation-becomes-sticky-after-volume-press-or-minimise-restore
			//http://www.youtube.com/watch?v=Xw9TIS_JsPM		
			//https://developer.android.com/training/system-ui/status.html
			activity.getWindow().getDecorView().setSystemUiVisibility(
				View.SYSTEM_UI_FLAG_HIDE_NAVIGATION//
				| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
				//| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
				//| View.SYSTEM_UI_FLAG_LAYOUT_STABLE
				| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
			);							
		
			final CordovaInterface cordova_final = cordova;
			//http://stackoverflow.com/questions/11762306/listen-for-first-touchevent-when-using-system-ui-flag-hide-navigation
			//http://stackoverflow.com/questions/15103339/android-full-screen-modeics-first-touch-shows-the-navigation-bar
			//http://developer.android.com/reference/android/view/View.OnSystemUiVisibilityChangeListener.html	
			//webView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener(){//cordova5 build error
			getView(webView).setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener(){//fixed cordova5 build error
				@Override
				public void onSystemUiVisibilityChange(int vis) {
					if(vis == 0){
						//http://stackoverflow.com/questions/3072173/how-to-call-a-method-after-a-delay-in-android
						Handler handler = new Handler();
						handler.postDelayed(new Runnable() {
							@Override
							public void run() {
								Activity activity=cordova_final.getActivity();
								activity.getWindow().getDecorView().setSystemUiVisibility(
									View.SYSTEM_UI_FLAG_HIDE_NAVIGATION//
									| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
									//| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
									//| View.SYSTEM_UI_FLAG_LAYOUT_STABLE
									| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
								);							
							}
						}, 3000);//after ms		    		
					}
				}
			});
		}
	}

	public static View getView(CordovaWebView webView) {	
		if(View.class.isAssignableFrom(CordovaWebView.class)) {
			return (View) webView;
		}
		
		try {
			Method getViewMethod = CordovaWebView.class.getMethod("getView", (Class<?>[]) null);
			if(getViewMethod != null) {
				Object[] args = {};
				return (View) getViewMethod.invoke(webView, args);
			}
		} 
		catch (Exception e) {
		}
		
		return null;
	}
	
	@TargetApi(Build.VERSION_CODES.HONEYCOMB) 
	private void _hideNavigationBar(){
		Activity activity=cordova.getActivity();
		activity.getWindow().getDecorView().setSystemUiVisibility(
			View.SYSTEM_UI_FLAG_LAYOUT_STABLE
			| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
			| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
			| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
			| View.SYSTEM_UI_FLAG_FULLSCREEN
			| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
		);	
	}
}