判断手机的网络连接状态，能够识别mobile和wifi连接。
以下程序，参考自 http://www.cnblogs.com/qingblog/archive/2012/07/19/2598983.html
获取网络信息需要在AndroidManifest.xml文件中加入相应的权限。
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
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/**
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* 判断网络连接状态
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* 1. mobile网络连接
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* 2. wifi网络连接
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* 3. 没有网络连接
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*
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* 判断的方法就是：利用ConnectivityManager来获取NetworkInfo。
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*
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* 在程序的后面还给了几个函数
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* 以下程序，参考自
http://www.cnblogs.com/qingblog/archive/2012/07/19/2598983.html
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*/
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package
com.example.networkstate;
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import
android.app.Activity;
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import
android.content.BroadcastReceiver;
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import
android.content.Context;
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import
android.content.Intent;
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import
android.content.IntentFilter;
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import
android.net.ConnectivityManager;
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import
android.net.NetworkInfo;
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import
android.os.Bundle;
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import
android.widget.TextView;
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public
class
MainActivity
extends
Activity {
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private
BroadcastReceiver connectionReceiver;
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private
TextView tvNetworkState;
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@Override
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protected
void
onCreate(Bundle savedInstanceState) {
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super
.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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tvNetworkState =
(TextView) findViewById(R.id.tvNetworkState);
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connectionReceiver =
new
BroadcastReceiver() {
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@Override
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public
void
onReceive(Context context, Intent intent) {
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ConnectivityManager connectMgr =
(ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
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NetworkInfo mobNetInfo =
connectMgr
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.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
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NetworkInfo wifiNetInfo =
connectMgr
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.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
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if
(mobNetInfo.isConnected()) {
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tvNetworkState.setText("手机网络连接~"
);
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}
else
if
(wifiNetInfo.isConnected()) {
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tvNetworkState.setText("wifi网络连接~"
);
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}
else
{
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tvNetworkState.setText("囧，没有网络连接~"
);
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}
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//
if (!mobNetInfo.isConnected() && !wifiNetInfo.isConnected())
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//
{
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//
//
unconnect network
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//
tvNetworkState.setText("当前没有网络连接！");
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//
} else {
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//
//
connect network
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//
tvNetworkState.setText("恭喜，有网络连接~");
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//
}
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}
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};
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IntentFilter intentFilter =
new
IntentFilter();
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intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
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registerReceiver(connectionReceiver, intentFilter);
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}
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@Override
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protected
void
onDestroy() {
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super
.onDestroy();
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if
(connectionReceiver !=
null
) {
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unregisterReceiver(connectionReceiver);
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}
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}
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public
boolean
isNetworkConneted(Context context) {
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if
(context !=
null
) {
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ConnectivityManager connectivityManager =
(ConnectivityManager) context
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.getSystemService(Context.CONNECTIVITY_SERVICE);
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NetworkInfo networkInfo =
connectivityManager
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.getActiveNetworkInfo();
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if
(networkInfo !=
null
) {
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return
networkInfo.isAvailable();
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}
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}
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return
false
;
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}
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public
boolean
isWifiConnected(Context context) {
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if
(context !=
null
) {
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ConnectivityManager connectivityManager =
(ConnectivityManager) context
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.getSystemService(Context.CONNECTIVITY_SERVICE);
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NetworkInfo networkInfo =
connectivityManager
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.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
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if
(networkInfo !=
null
) {
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return
networkInfo.isAvailable();
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}
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}
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return
false
;
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}
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public
boolean
isMobileConnected(Context context) {
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if
(context !=
null
) {
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ConnectivityManager mConnectivityManager =
(ConnectivityManager) context
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.getSystemService(Context.CONNECTIVITY_SERVICE);
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NetworkInfo mMobileNetworkInfo =
mConnectivityManager
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.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
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if
(mMobileNetworkInfo !=
null
) {
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return
mMobileNetworkInfo.isAvailable();
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}
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}
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return
false
;
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}
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public
static
int
getConnectedType(Context context) {
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if
(context !=
null
) {
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ConnectivityManager mConnectivityManager =
(ConnectivityManager) context
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.getSystemService(Context.CONNECTIVITY_SERVICE);
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NetworkInfo mNetworkInfo =
mConnectivityManager
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.getActiveNetworkInfo();
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if
(mNetworkInfo !=
null
&&
mNetworkInfo.isAvailable()) {
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return
mNetworkInfo.getType();
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}
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}
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return
-1
;
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}
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}
