监听网络状态

监听网络状态，依旧笔记

    //检测网络是否可用    public static boolean isNetworkAvailable(Activity mActivity) {        Context context = mActivity.getApplicationContext();        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);        if (connectivityManager == null) {            return false;        } else {            // 获取当前连接可用的网络            NetworkInfo mNetworkInfo = connectivityManager.getActiveNetworkInfo();            if (mNetworkInfo != null) {                Log.d(TAG, "isNetworkAvailable: 当前网络连接" + mNetworkInfo.isAvailable());                return mNetworkInfo.isAvailable();            }        }        return false;    }

一般要监听网络变化，用广播实现。

public class NetWorkReceiver extends BroadcastReceiver {    private static final String TAG = "NetWorkReceiver";    @Override    public void onReceive(Context context, Intent intent) {        Log.e(TAG, "网络状态改变");        boolean success = false;//        //获得网络连接服务//        ConnectivityManager connManager = (ConnectivityManager)//context.getSystemService(CONNECTIVITY_SERVICE);//        // State state = connManager.getActiveNetworkInfo().getState();////        //新版本获取网络状态//        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {//            Network[] networks = connManager.getAllNetworks();//            NetworkInfo networkInfo;//            for (Network mNetwork : networks) {//                networkInfo = connManager.getNetworkInfo(mNetwork);//                if (networkInfo.getState().equals(NetworkInfo.State.CONNECTED)) {//                    success = true;//                }//            }//        }else {//            //旧版本方法//            if (connManager != null) {//                NetworkInfo[] info = connManager.getAllNetworkInfo();//                if (info != null) {//                    for (NetworkInfo anInfo : info) {//                        if (anInfo.getState() == NetworkInfo.State.CONNECTED) {//                            success = true;//                            Log.d(TAG, "NETWORKNAME: " + anInfo.getTypeName());//                        }//                    }//                }//            }//        }        success = SystemSetting.isNetworkAvailable((Activity) context);        if (!success) {            Toast.makeText(context, "网络出错，请检查网络连接", Toast.LENGTH_LONG).show();        }    }}

//onCreate()注册网络监听netWorkReceiver = new NetWorkReceiver();IntentFilter filterNetwork = new IntentFilter();filterNetwork.addAction(ConnectivityManager.CONNECTIVITY_ACTION);registerReceiver(netWorkReceiver, filterNetwork);

//onDestroy()注销广播unregisterReceiver(netWorkReceiver);