底部状态栏频繁的手动滑出与隐藏，再跳转页面后返回时会导致本页面数据清空然后重新加载。
控制台打出一堆错误信息如下：
D/HardwareRenderer: destroy thread Render this = android.view.ThreadedRenderer@1b407311
java.lang.Throwable: loadSystemProperties
at android.view.ThreadedRenderer.loadSystemProperties(ThreadedRenderer.java:262)
at android.view.ViewRootImpl$4.run(ViewRootImpl.java:6142)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.os.HandlerThread.run(HandlerThread.java:61)
at com.android.server.ServiceThread.run(ServiceThread.java:46)