Question

我正在手机中创建 wifi热点，我想在开启或关闭热点时获取状态更改事件。

Answer 1

请查看以下代码。这将有助于你

public class WifiApManager {
    private final WifiManager mWifiManager;

    public WifiApManager(Context context) {
        mWifiManager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
    }

    /*the following method is for getting the wifi hotspot state*/

    public WIFI_AP_STATE getWifiApState() {
        try {
            Method method = mWifiManager.getClass().getMethod("getWifiApState");

            int tmp = ((Integer) method.invoke(mWifiManager));

            // Fix for Android 4
            if (tmp > 10) {
                tmp = tmp - 10;
            }

            return WIFI_AP_STATE.class.getEnumConstants()[tmp];
        } catch (Exception e) {
            Log.e(this.getClass().toString(), "", e);
            return WIFI_AP_STATE.WIFI_AP_STATE_FAILED;
        }
    }

    /**
     * Return whether Wi-Fi Hotspot is enabled or disabled.
     * 
     * @return {@code true} if Wi-Fi AP is enabled
     * @see #getWifiApState()
     */
    public boolean isWifiApEnabled() {
        return getWifiApState() == WIFI_AP_STATE.WIFI_AP_STATE_ENABLED;
    }

}

其中WIFI_AP_STATE是枚举，如下所示

  public enum WIFI_AP_STATE {
      WIFI_AP_STATE_DISABLING, 
      WIFI_AP_STATE_DISABLED, 
      WIFI_AP_STATE_ENABLING, 
      WIFI_AP_STATE_ENABLED, 
      WIFI_AP_STATE_FAILED
  }

Answer 2

要获取热点AP的当前状态，我使用：

final WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
final int apState = (Integer) wifiManager.getClass().getMethod("getWifiApState").invoke(wifiManager);

if (apState == 13) {
    // Ap Enabled
}

要在启用/禁用热点AP时获取更新，请接收＆＃34; android.net.wifi.WIFI_AP_STATE_CHANGED＆＃34;意图在BroadcastReceiver中：

public class WifiAPReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction() == "android.net.wifi.WIFI_AP_STATE_CHANGED") {
            int apState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);
            if (apState == 13) {
                // Hotspot AP is enabled
            } else {
                // Hotspot AP is disabled/not ready
            }
        }
    }
}

另外，请不要忘记您在Manifest中的声明和权限：

<receiver android:name=".WifiAPReceiver">
    <intent-filter>
        <action android:name="android.net.wifi.WIFI_AP_STATE_CHANGED" />
    </intent-filter>
</receiver>

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

Answer 3

您可以使用BroadcastReciver监控wifi状态。以下是如何实现它的示例： http://silverballsoftware.com/android-monitor-wifi-state-with-broadcastreceiver

Answer 4

试试这个

将此代码写入OnCreate（）方法

ConnectivityManager cm = (ConnectivityManager) getSystemService(con.CONNECTIVITY_SERVICE);
        NetworkInfo netInfo = cm.getActiveNetworkInfo();
        if (netInfo != null && netInfo.isConnectedOrConnecting()) {

            Success 
        }

        else {
                       Give Some Error Message
             }

还提到了清单文件的必要权限

如何获得wifi热点状态

4 个答案: