android系统弹窗关闭

全局弹窗

终端开发总是会有这样的需求，无论在哪些场景下某种判断成立时候需要弹出通知比如网络断开等情况。类似这样的全局弹窗无非就是系统的或者悬浮窗，悬浮窗的话需要用户开启悬浮窗权限，这里我就只提一下的实现。这也是我在用的一种。

众所周知中依赖于，所以要显示全局弹窗，最终问题就是获取最上面的对象，这就涉及到的管理，一般会有在base中建立activity列表维护所有activity，我们这边使用在application生命周期监听函数中处理。

首先这里有一个顶部activity管理的单例类：

publicclassTopActivityManager{privatestaticfinalStringTAG="MyActivityManager";publicstaticTopActivityManagerinstance=newTopActivityManager();privateWeakReferenceActivitycurrentActivityWeakRef;publicTopActivityManager(){}publicstaticTopActivityManagergetInstance(){returninstance;}publicActivitygetCurrentActivity(){ActivitycurrentActivity=null;if(currentActivityWeakRef!=null){currentActivity=currentActivityWeakRef.get();}returncurrentActivity;}publicvoidsetCurrentActivity(Activityactivity){currentActivityWeakRef=newWeakReference(activity);LogMgr.d(TAG,currentActivityWeakRef.get().getClass().getSimpleName());}}

然后就是调用set更新该对象的时机：

privatevoidinitLifeCycle(){registerActivityLifecycleCallbacks(newActivityLifecycleCallbacks(){@OverridepublicvoidonActivityCreated(Activityactivity,BundlesavedInstanceState){LogMgr.d(TAG,"onActivityCreated");TopActivityManager.getInstance().setCurrentActivity(activity);}@OverridepublicvoidonActivityStarted(Activityactivity){LogMgr.d(TAG,"onActivityStarted");}@OverridepublicvoidonActivityResumed(Activityactivity){LogMgr.d(TAG,"onActivityResumed");TopActivityManager.getInstance().setCurrentActivity(activity);}@OverridepublicvoidonActivityPaused(Activityactivity){LogMgr.d(TAG,"onActivityPaused");}@OverridepublicvoidonActivityStopped(Activityactivity){LogMgr.d(TAG,"onActivityStopped");}@OverridepublicvoidonActivitySaveInstanceState(Activityactivity,BundleoutState){LogMgr.d(TAG,"onActivitySaveInstanceState");}@OverridepublicvoidonActivityDestroyed(Activityactivity){LogMgr.d(TAG,"onActivityDestroyed");}});}

这边可以看到在create和resume中都调用了set方法，resume调用是为了防止A启动B，B关闭后回到A的情况，在create时候设置是因为在有些情况进入页面oncreate里面就会做一些判断需要弹出全局弹窗，用到顶部activity，所以避免出错两个地方都进行设置。

这里再提供一份弹窗代码供测试

publicclassNetErrorDialog{privatestaticfinalStringTAG="NetErrorDialog";privatestaticNetErrorDialoginstance;@BindView(R.id.tvCancel)TextViewtvCancel;@BindView(R.id.tvNetSet)TextViewtvNetSet;privateMyDialognetErrorDialog;privateNetHandlernetHandler;publicstaticNetErrorDialoggetInstance(){if(instance==null){synchronized(NetErrorDialog.class){if(instance==null){instance=newNetErrorDialog();}}}returninstance;}privateNetErrorDialog(){netHandler=newNetHandler();}publicvoidshowDialog(){if(netErrorDialog!=nullnetErrorDialog.isShowing()){if(netErrorDialog.getContext()==TopActivityManager.getInstance().getCurrentActivity()){return;}else{dismiss();}}netErrorDialog=newMyDialog(TopActivityManager.getInstance().getCurrentActivity(),R.style.DialogTheme);ViewdlgView=LayoutInflater.from(TopActivityManager.getInstance().getCurrentActivity()).inflate(R.layout.dlg_net_error,null);ButterKnife.bind(this,dlgView);netErrorDialog.setContentView(dlgView);netErrorDialog.setCancelable(false);Windowwindow=netErrorDialog.getWindow();window.setGravity(Gravity.CENTER);window.setDimAmount(0f);window.setWindowAnimations(R.style.center_dialog_animStyle);window.setLayout(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);WindowManager.LayoutParamsparams=window.getAttributes();params.width=DisplayUtils.getInstance().dpToPx(340);params.height=DisplayUtils.getInstance().dpToPx(140);window.setAttributes(params);tvCancel.setOnClickListener(newView.OnClickListener(){@OverridepublicvoidonClick(Viewv){netErrorDialog.dismiss();if(netHandler!=null){netHandler.sendMsg();}}});tvNetSet.setOnClickListener(newView.OnClickListener(){@OverridepublicvoidonClick(Viewv){IntentwifiSettingsIntent=newIntent("android.settings.WIFI_SETTINGS");wifiSettingsIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);TopActivityManager.getInstance().getCurrentActivity().startActivity(wifiSettingsIntent);}});netErrorDialog.show();}publicvoiddismiss(){if(netErrorDialog!=nullnetErrorDialog.isShowing()){netErrorDialog.dismiss();}}publicclassNetHandlerextendsHandler{privatestaticfinalintWHAT_NET_TIP=0x222;@OverridepublicvoidhandleMessage(Messagemsg){super.handleMessage(msg);if(msg.what==WHAT_NET_TIP){if(!NetUtils.isNetworkAvailable()){showDialog();}else{dismiss();}}}publicvoidsendMsg(){LogMgr.d(TAG,"startsenddelay");sendEmptyMessageDelayed(WHAT_NET_TIP,3*60*1000);}}publicvoidrelease(){if(netErrorDialog!=null){if(netErrorDialog.isShowing()){netErrorDialog.dismiss();}netErrorDialog=null;}instance=null;}}

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