Android App隐藏Navigation Bar

               

1. 简介

    在Android4.4.2(KITKAT<Build.VERSION_CODES.KITKAT>)之前，只能设置：           

      1）View.SYSTEM_UI_FLAG_HIDE_NAVIGATION

           其缺点是当Touch Screen时，Navigation bar将显示出来。

    从Android4.4.2起，可以设置：

     1）View.SYSTEM_UI_FLAG_HIDE_NAVIGATION

     2）View.SYSTEM_UI_FLAG_IMMERSIVE

         同时设置以上两个参数，即使Touch Screen时，Navigation bar也不会显示出来。

2. 实现代码

private static Handler sHandler;protected void onCreate(Bundle savedInstanceState){      super.onCreate(savedInstanceState);       sHandler = new Handler();        sHandler.post(mHideRunnable); // hide the navigation bar    final View decorView = getWindow().getDecorView();    decorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener()        {            @Override            public void onSystemUiVisibilityChange(int visibility)            {                sHandler.post(mHideRunnable); // hide the navigation bar            }        });        }Runnable mHideRunnable = new Runnable() {    @Override    public void run() {        int flags;          int curApiVersion = android.os.Build.VERSION.SDK_INT;        // This work only for android 4.4+        if(curApiVersion >= Build.VERSION_CODES.KITKAT){            // This work only for android 4.4+            // hide navigation bar permanently in android activity            // touch the screen, the navigation bar will not show            flags = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION                  | View.SYSTEM_UI_FLAG_IMMERSIVE                  | View.SYSTEM_UI_FLAG_FULLSCREEN;                        }else{            // touch the screen, the navigation bar will show            flags = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;        }                // must be executed in main thread :)        getWindow().getDecorView().setSystemUiVisibility(flags);    }};