需要配置权限

在AndroidManifest.xml 中添加代码：

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

2. 通过ConnectivityManager类来进行编码操作。

publicvoidgetNetworkState(){ConnectivityManagerconnManager=(ConnectivityManager)this.getSystemService(CONNECTIVITY_SERVICE);//获取代表联网状态的NetWorkInfo对象NetworkInfonetworkInfo=connManager.getActiveNetworkInfo();//获取当前的网络连接是否可用if(null==networkInfo){Toast.makeText(this,"当前的网络连接不可用",Toast.LENGTH_SHORT).show();//当网络不可用时，跳转到网络设置页面startActivityForResult(newIntent(android.provider.Settings.ACTION_WIRELESS_SETTINGS),1);}else{booleanavailable=networkInfo.isAvailable();if(available){Log.i("通知","当前的网络连接可用");Toast.makeText(this,"当前的网络连接可用",Toast.LENGTH_SHORT).show();}else{Log.i("通知","当前的网络连接不可用");Toast.makeText(this,"当前的网络连接不可用",Toast.LENGTH_SHORT).show();}}NetworkInfo.Statestate=connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();if(NetworkInfo.State.CONNECTED==state){Log.i("通知","GPRS网络已连接");Toast.makeText(this,"GPRS网络已连接",Toast.LENGTH_SHORT).show();}state=connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();if(NetworkInfo.State.CONNECTED==state){Log.i("通知","WIFI网络已连接");Toast.makeText(this,"WIFI网络已连接",Toast.LENGTH_SHORT).show();}////跳转到无线网络设置界面//startActivity(new//Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS));////跳转到无限wifi网络设置界面//startActivity(new//Intent(android.provider.Settings.ACTION_WIFI_SETTINGS));}