android 全屏，无标题栏

    private CustomProgressDialog progressDialog = null; 
    @SuppressLint({ "SetJavaScriptEnabled", "JavascriptInterface" }) @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
     // 取消标题 
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
     // 进行全屏       
        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        
        ExitApplication.getInstance().addActivity(this);
        setContentView(R.layout.activity_fullscreen);


        
        
        CookieSyncManager.createInstance(this);   
        CookieSyncManager.getInstance().startSync();   
        CookieManager.getInstance().removeSessionCookie();