Android中判断网络是否可用的代码分享

import android.content.Context; import android.net.ConnectivityManager;
import android.net.NetworkInfo; import android.telephony.TelephonyManager;
/**
* Created by hackcoder on 15-1-25.
*/
public class NetWorkUtils {
/**
* 判断是否有网络连接
* @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;
}
/**
* 判断WIFI网络是否可用
* @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;
}
/**
* 判断MOBILE网络是否可用
* @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;
}
/**
* 获取当前网络连接的类型信息
* @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;
}
/**
* 获取当前的网络状态 ：没有网络0：WIFI网络1：3G网络2：2G网络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;
}
}

package cn.hackcoder.beautyreader.broadcast;
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;
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;
}
}
}
注册：
<receiver    android:name=".broadcast.NetWorkStatusReceiver"   android:enabled="true"   android:exported="true">
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
</intent-filter>
</receiver>