获取Wifi信息及注册Wifi改变信息

项目用到，标记记录一下方便下一次使用。

先获取系统服务

(ConnectivityManager) mContext

                .getSystemService(Context.CONNECTIVITY_SERVICE);

注册广播

IntentFilter ifilter = new IntentFilter(

                    WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);

            ifilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);

            ifilter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);



            mContext.registerReceiver(mWifiStateReceiver, ifilter);

接收广播

public class WifiStateReceiver extends BroadcastReceiver {



		@Override

		public void onReceive(Context context, Intent intent) {

			try {

				AspLog.v(TAG,

						"WifiStateReceiver onReceive:" + intent.getAction());

				if (intent.getAction().equals(

						WifiManager.WIFI_STATE_CHANGED_ACTION)) {

					if (dialog_loading != null) {

						AspLog.v(TAG,

								"WIFI_STATE_CHANGED_ACTION dialog_loading="

										+ dialog_loading + ",showing="

										+ dialog_loading.isShowing()

										+ ",wifistate=" + getWIFIstate());

					} else {

						AspLog.v(TAG,

								"WIFI_STATE_CHANGED_ACTION dialog_loading="

										+ dialog_loading + ",showing=null"

										+ ",wifistate=" + getWIFIstate());



					}

					if (dialog_loading != null && dialog_loading.isShowing()

							&& getWIFIstate() == State.CONNECTED) {

						dialog_loading.dismiss();

						finishAsOk(intent);

					}

				}

				if (intent.getAction().equals(

						WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) {// 判断wifi

																		// enable的事件

					if (mWifiList == null || mWifiList.size() == 0) {

						mWifiList = mWifiManager.getScanResults();

						listScanResults();

					}

					handlerWIFIMessage(STATE_UPDATE_LIST);

				}

				if (intent.getAction().equals(

						WifiManager.NETWORK_STATE_CHANGED_ACTION)) {// 判断wifi

																	// enable的事件

					mWifiList = mWifiManager.getScanResults();

					listScanResults();

					AspLog.v(TAG, "wifiList size:" + mWifiList.size());

					handlerWIFIMessage(STATE_UPDATE_LIST);

					if (dialog_loading != null) {

						AspLog.v(TAG,

								"NETWORK_STATE_CHANGED_ACTION dialog_loading="

										+ dialog_loading + ",showing="

										+ dialog_loading.isShowing()

										+ ",wifistate=" + getWIFIstate());

					} else {

						AspLog.v(TAG,

								"NETWORK_STATE_CHANGED_ACTION dialog_loading="

										+ dialog_loading + ",showing= null"

										+ ",wifistate=" + getWIFIstate());



					}

					if (dialog_loading != null && dialog_loading.isShowing()

							&& getWIFIstate() == State.CONNECTED) {

						dialog_loading.dismiss();

						finishAsOk(intent);

					}

				}

			} catch (Exception ex) {

				ex.printStackTrace();

			}

		}

	}

　　

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资料：

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