Android实现隐藏手机底部虚拟按键

 /**
   * 隐藏虚拟按键，并且全屏
 */
  protected void hideBottomUIMenu(){
    //隐藏虚拟按键，并且全屏
    if (Build.VERSION.SDK_INT > 11 && Build.VERSION.SDK_INT < 19) { // lower api
      View v = this.getWindow().getDecorView();
      v.setSystemUiVisibility(View.GONE);
    } else if (Build.VERSION.SDK_INT >= 19) {
      //for new api versions.
      View decorView = getWindow().getDecorView();
      int uiOptions = 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 // hide nav bar
//          | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
          | View.SYSTEM_UI_FLAG_IMMERSIVE;
      decorView.setSystemUiVisibility(uiOptions);
      getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
    }
  }

/**
   * 检查是否存在虚拟按键栏
   * @param context
   * @return
   */
  public static boolean hasNavBar(Context context) {
    Resources res = context.getResources();
    int resourceId = res.getIdentifier("config_showNavigationBar", "bool", "android");
    if (resourceId != 0) {
      boolean hasNav = res.getBoolean(resourceId);
      // check override flag
      String sNavBarOverride = getNavBarOverride();
      if ("1".equals(sNavBarOverride)) {
        hasNav = false;
      } else if ("0".equals(sNavBarOverride)) {
        hasNav = true;
      }
      return hasNav;
    } else { // fallback
      return !ViewConfiguration.get(context).hasPermanentMenuKey();
    }
  }
 
  /**
   * 判断虚拟按键栏是否重写
   * @return
   */
  private static String getNavBarOverride() {
    String sNavBarOverride = null;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
      try {
        Class c = Class.forName("android.os.SystemProperties");
        Method m = c.getDeclaredMethod("get", String.class);
        m.setAccessible(true);
        sNavBarOverride = (String) m.invoke(null, "qemu.hw.mainkeys");
      } catch (Throwable e) {
      }
    }
    return sNavBarOverride;
  }