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/** * 测试ConnectivityManager
* ConnectivityManager主要管理和网络连接相关的操作
* 相关的TelephonyManager则管理和手机、运营商等的相关信息;WifiManager则管理和wifi相关的信息。
* 想访问网络状态,首先得添加权限<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
* NetworkInfo类包含了对wifi和mobile两种网络模式连接的详细描述,通过其getState()方法获取的State对象则代表着
* 连接成功与否等状态。
*
*/ public void testConnectivityManager() {
ConnectivityManager connManager = (ConnectivityManager) this .getSystemService(CONNECTIVITY_SERVICE);
// 获取代表联网状态的NetWorkInfo对象
NetworkInfo networkInfo = connManager.getActiveNetworkInfo();
// 获取当前的网络连接是否可用
boolean available = networkInfo.isAvailable();
if (available){
Log.i( "通知" , "当前的网络连接可用" );
}
else {
Log.i( "通知" , "当前的网络连接可用" );
}
State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();
if (State.CONNECTED==state){
Log.i( "通知" , "GPRS网络已连接" );
}
state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();
if (State.CONNECTED==state){
Log.i( "通知" , "WIFI网络已连接" );
}
// 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));
}
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android中判断网络连接是否可用
一、判断网络连接是否可用
public static boolean isNetworkAvailable(Context context) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (cm == null) {
} else {
//如果仅仅是用来判断网络连接
//则可以使用 cm.getActiveNetworkInfo().isAvailable();
NetworkInfo[] info = cm.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
}
}
return false;
}
二、判断GPS是否打开
public static boolean isGpsEnabled(Context context) {
LocationManager lm = ((LocationManager) context
.getSystemService(Context.LOCATION_SERVICE));
List accessibleProviders = lm.getProviders(true);
return accessibleProviders != null && accessibleProviders.size() > 0;
}
三、判断WIFI是否打开
public static boolean isWifiEnabled(Context context) {
ConnectivityManager mgrConn = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
TelephonyManager mgrTel = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
return ((mgrConn.getActiveNetworkInfo() != null && mgrConn
.getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel
.getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);
}
四、判断是否是3G网络
public static boolean is3rd(Context context) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkINfo = cm.getActiveNetworkInfo();
if (networkINfo != null
&& networkINfo.getType() == ConnectivityManager.TYPE_MOBILE) {
return true;
}
return false;
}
五、判断是wifi还是3g网络,用户的体现性在这里了,wifi就可以建议下载或者在线播放。
public static boolean isWifi(Context context) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkINfo = cm.getActiveNetworkInfo();
if (networkINfo != null
&& networkINfo.getType() == ConnectivityManager.TYPE_WIFI) {
return true;
}
return false;
}