| public class MainActivity extends
Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); this.registerReceiver(mBroadcastReceiver, new IntentFilter( ConnectivityManager.CONNECTIVITY_ACTION)); } private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Bundle bundle = intent.getExtras(); NetworkInfo aNetworkInfo = (NetworkInfo) bundle .get(ConnectivityManager.EXTRA_NETWORK_INFO); if (aNetworkInfo.isConnected()) { System.out.println("connecte"); } else { System.out.println("not connect"); } if (aNetworkInfo.isAvailable()) { System.out.println("available"); } else { System.out.println("not available"); } System.out.println("--------------------"); } }; } |
总结有以下5种状态：
在WLAN设置界面
1，显示连接已保存，但标题栏没有，即没有实质连接上，输出为：not connect， available
2，显示连接已保存，标题栏也有已连接上的图标， 输出为：connect， available
3，选择不保存后 输出为：not connect， available
4，选择连接，在正在获取IP地址时 输出为：not connect， not available
5，连接上后 输出为：connect， available
文章出处：http://blog.csdn.net/santicom/article/details/6932421