Android 隐藏 SystemUI 全屏显示

第一种方法：

       修改：frameworks/base/core/res/res/values/dimens.xml 把下面这些值都修改成0即可，编译验证。

<resources>    // 省略部分    <!-- Height of the status bar -->    <dimen name="status_bar_height">0dip</dimen>    <!-- Height of the bottom navigation / system bar. -->    <dimen name="navigation_bar_height">0dp</dimen>    <!-- Height of the bottom navigation bar in portrait; often the same as @dimen/navigation_bar_height -->    <dimen name="navigation_bar_height_landscape">0dp</dimen>    <!-- Width of the navigation bar when it is placed vertically on the screen -->    <dimen name="navigation_bar_width">0dp</dimen>    <!-- Height of notification icons in the status bar -->    <dimen name="status_bar_icon_size">0dip</dimen>    <!-- Size of the giant number (unread count) in the notifications -->    <dimen name="status_bar_content_number_size">0sp</dimen>    <!-- Height of the system bar (combined status & navigation); used by         SystemUI internally, not respected by the window manager. -->    //省略部分</resources>

第二种方法：

        修改frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/tablet/TabletStatusBar.java

private void addStatusBarWindow() {        final View sb = makeStatusBarView();        final WindowManager.LayoutParams lp = new WindowManager.LayoutParams(                ViewGroup.LayoutParams.MATCH_PARENT,                ViewGroup.LayoutParams.MATCH_PARENT,                WindowManager.LayoutParams.TYPE_NAVIGATION_BAR,                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE                    | WindowManager.LayoutParams.FLAG_TOUCHABLE_WHEN_WAKING                    | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH,                PixelFormat.OPAQUE);        // We explicitly leave FLAG_HARDWARE_ACCELERATED out of the flags.  The status bar occupies        // very little screen real-estate and is updated fairly frequently.  By using CPU rendering        // for the status bar, we prevent the GPU from having to wake up just to do these small        // updates, which should help keep power consumption down.        lp.gravity = getStatusBarGravity();        lp.setTitle("SystemBar");        lp.packageName = mContext.getPackageName();        // 注释掉下面这行即可隐藏SystemUI，全屏显示        //mWindowManager.addView(sb, lp); }