Android网络状态及关闭所有Activity

/** * 退出程序(关闭所有当前运行程序所有的Activity) */public void exit(){//<uses-permission android:name="android.permission.RESTART_PACKAGES"></uses-permission>ActivityManager actManager = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE); actManager.restartPackage(getPackageName()); } 

 

public Boolean getNetworkIsAvailable(){//此处写网络检测的代码//<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>ConnectivityManager conManager=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE ); NetworkInfo networkInfo = conManager.getActiveNetworkInfo(); if (networkInfo != null ){ return networkInfo.isAvailable(); } return false ;}