Android5.0系统WIFI状态如何向应用程序通知

打印的过滤：

logcat -s WifiMonitor wpa_supplicant WifiSettings WifiHW WifiConfigStore WifiStateMachine addOrUpdateNetworkNative WifiManager

1.frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiMonitor.java

public class WifiMonitor {
  private static class MonitorThread extends Thread {
    public void run() {
      //noinspection InfiniteLoopStatement
      for (;;) {
        String eventStr = mWifiNative.waitForEvent();

        // Skip logging the common but mostly uninteresting scan-results event
        if (DBG && eventStr.indexOf(SCAN_RESULTS_STR) == -1) {
          Log.d(TAG, "Event [" + eventStr + "]");
        }

        if (mWifiMonitorSingleton.dispatchEvent(eventStr)) {
          if (DBG) Log.d(TAG, "Disconnecting from the supplicant, no more events");
          break;
        }
      }
    }
  }

  private boolean dispatchEvent(String eventStr, String iface) {
    handleSupplicantStateChange(eventData);
  }

  private void handleSupplicantStateChange(String dataString) {
    notifySupplicantStateChange(networkId, wifiSsid, BSSID, newSupplicantState);
  }

  void notifySupplicantStateChange(int networkId, WifiSsid wifiSsid, String BSSID,
            SupplicantState newState) {
    mStateMachine.sendMessage(mStateMachine.obtainMessage(SUPPLICANT_STATE_CHANGE_EVENT,
              eventLogCounter, 0, new StateChangeResult(networkId, wifiSsid, BSSID, newState)));
  }
}

2.frameworks/opt/net/wifi/service/java/com/android/server/wifi/SupplicantStateTracker.java

private void sendSupplicantStateChangedBroadcast(SupplicantState state, boolean failedAuth) {
  if (failedAuth) {
    intent.putExtra(
    WifiManager.EXTRA_SUPPLICANT_ERROR,
    WifiManager.ERROR_AUTHENTICATING);
  }
  mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
}

通过广播通知应用程序。