這篇文章主要介紹了Android中判斷網路是否可用的程式碼分享,
本文直接給出實現程式碼,需要的朋友可以參考下

獲取網路資訊需要在AndroidManifest.xml檔案中加入相應的許可權:

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

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import
 
 android.util.Log;
import android.widget.Toast;

import cn.hackcoder.beautyreader.activity.base.BaseActivity;
import cn.hackcoder.beautyreader.utils.NetWorkUtils;
    /**
     * 判斷是否有網路連線
     * @internet:http://blog.csdn.net/w630886916
     * @param daqie
     * @return
     */
public class NetWorkStatusReceiver
 
 extends BroadcastReceiver {

  public NetWorkStatusReceiver() {

  }

  @Override
  public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();
    if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
      Toast.makeText(context, "network changed", Toast.LENGTH_LONG).show();
      BaseActivity.isNetWorkConnected = NetWorkUtils.getAPNType(context)>0
 
;
    }
  }
}

新建類/幾個方法的使用：

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;


/**
 * @大企鵝
 */
public class NetWorkUtils {


    /**
     * 判斷是否有網路連線
     * @param context
     * @return
     */
    public static boolean isNetworkConnected(Context context) {
        if (context != null) {
            ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
            if (mNetworkInfo != null) {
                return mNetworkInfo.isAvailable();
            }
        }
        return false;
    }


    /**
     * 判斷WIFI網路是否可用
     * @param context
     * @return
     */
    public static boolean isWifiConnected(Context context) {
        if (context != null) {
            ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo mWiFiNetworkInfo = mConnectivityManager
                    .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
            if (mWiFiNetworkInfo != null) {
                return mWiFiNetworkInfo.isAvailable();
            }
        }
        return false;
    }


    /**
     * 判斷MOBILE網路是否可用
     * @param context
     * @return
     */
    public static boolean isMobileConnected(Context context) {
        if (context != null) {
            ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo mMobileNetworkInfo = mConnectivityManager
                    .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
            if (mMobileNetworkInfo != null) {
                return mMobileNetworkInfo.isAvailable();
            }
        }
        return false;
    }


    /**
     * 獲取當前網路連線的型別資訊
     * @param context
     * @return
     */
    public static int getConnectedType(Context context) {
        if (context != null) {
            ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
            if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {
                return mNetworkInfo.getType();
            }
        }
        return -1;
    }


    /**
     * 獲取當前的網路狀態 ：沒有網路0：WIFI網路1：3G網路2：2G網路3
     *
     * @param context
     * @return
     */
    public static int getAPNType(Context context) {
        int netType = 0;
        ConnectivityManager connMgr = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
        if (networkInfo == null) {
            return netType;
        }
        int nType = networkInfo.getType();
        if (nType == ConnectivityManager.TYPE_WIFI) {
            netType = 1;// wifi
        } else if (nType == ConnectivityManager.TYPE_MOBILE) {
            int nSubType = networkInfo.getSubtype();
            TelephonyManager mTelephony = (TelephonyManager) context
                    .getSystemService(Context.TELEPHONY_SERVICE);
            if (nSubType == TelephonyManager.NETWORK_TYPE_UMTS
                    && !mTelephony.isNetworkRoaming()) {
                netType = 2;// 3G
            } else {
                netType = 3;// 2G
            }
        }
        return netType;
    }
}

註冊：

<receiver
   android:name=".daqie.aaaaa"
   android:enabled="true"
   android:exported="true">
   <intent-filter>
     <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
   </intent-filter>
 </receiver>