Android4.4 新增沉浸模式

public void setFullScreen(){//开启全屏View m_DecorView=getWindow().getDecorView();if(getSystemVersion()>18){m_DecorView.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);}}

在程序onCreate() onResume() dispatchKeyEvent() onWindowFocusChanged() 分别调用

按音量键会调出按钮栏，对音量按键进行处理再次调用

public void onWindowFocusChanged(boolean hasFocus){Log.i("cp", "onWindowFocusChanged");setFullScreen();super.onWindowFocusChanged(hasFocus);mUnityPlayer.windowFocusChanged(hasFocus);}

public boolean dispatchKeyEvent(KeyEvent event){Log.i("cp", "dispatchKeyEvent");setFullScreen();if (event.getAction() == KeyEvent.ACTION_MULTIPLE)return mUnityPlayer.onKeyMultiple(event.getKeyCode(), event.getRepeatCount(), event);return super.dispatchKeyEvent(event);}

获取系统版本

public static int getSystemVersion(){int ver=android.os.Build.VERSION.SDK_INT;return ver;}