HideNavigationBarComponent.java

HideNavigationBarComponent.java

package com.dexode.core.view;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnSystemUiVisibilityChangeListener;

/**
 * 
 * @author Dawid Drozd
 * 
 *         Please check before adding this fragment simply call
 *         isFragmentAvailable.
 * 
 *         You must manually call onKeyDown and onWindowFocusChanged.
 * 
 */
public class HideNavigationBarComponent extends Fragment implements Runnable {

	@SuppressLint("NewApi")
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setImmersiveMode();

		final View decorView = getActivity().getWindow().getDecorView();
		decorView.setOnSystemUiVisibilityChangeListener(new OnSystemUiVisibilityChangeListener() {

			@Override
			public void onSystemUiVisibilityChange(int visibility) {
				if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
					setImmersiveMode();
				}
			}
		});
	}

	public static boolean isFragmentAvailable() {
		return android.os.Build.VERSION.SDK_INT >= 19;
	}

	public void onWindowFocusChanged(boolean hasFocus) {
		if (hasFocus) {
			_handler.removeCallbacks(this);
			_handler.postDelayed(this, 300);
		}
		else {
			_handler.removeCallbacks(this);
		}
	}

	public void onKeyDown(int keyCode) {
		if ((keyCode == KeyEvent.KEYCODE_VOLUME_DOWN || keyCode == KeyEvent.KEYCODE_VOLUME_UP)) {
			_handler.removeCallbacks(this);
			_handler.postDelayed(this, 500);
		}
	}

	@Override
	public void onStop() {
		_handler.removeCallbacks(this);
		super.onStop();
	}

	@Override
	public void run() {
		setImmersiveMode();
	}

	@SuppressLint("NewApi")
	public void setImmersiveMode() {
		setImmersiveMode(getActivity());
	}

	@SuppressLint("NewApi")
	public void setImmersiveMode(Activity activity) {
		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);
	}

	private Handler _handler = new Handler();
}