Android打开WLAN开关的广播状态监听

╰半夏微凉° 2022-07-13 02:27 209阅读 0赞

## Android打开WLAN开关的广播状态监听 ##

Android中WLAN的广播监听的是WLAN状态的改变 ，Action是**WifiManager.WIFI\_STATE\_CHANGED\_ACTION**，WLAN的状态系统定义了5种，分别是

WIFI_STATE_DISABLED    WLAN已经关闭
    WIFI_STATE_DISABLING   WLAN正在关闭
    WIFI_STATE_ENABLED     WLAN已经打开
    WIFI_STATE_ENABLING    WLAN正在打开
    WIFI_STATE_UNKNOWN     未知

下面看实例代码：

public class WLANListener { 
    
        private Context mContext;
        private WLANBroadcastReceiver receiver;
        private WLANStateListener mWLANStateListener;
    
        public WLANListener(Context context) {
            mContext = context;
            receiver = new WLANBroadcastReceiver();
        }
    
        public void register(WLANStateListener listener) {
            mWLANStateListener = listener;
            if (receiver != null) {
                IntentFilter filter = new IntentFilter();
                filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
                mContext.registerReceiver(receiver, filter);
            }
        }
    
        public void unregister() {
            if (receiver != null) {
                mContext.unregisterReceiver(receiver);
            }
        }
    
        private class WLANBroadcastReceiver extends BroadcastReceiver { 
    
            @Override
            public void onReceive(Context context, Intent intent) {
                if (intent != null) {
                    String action = intent.getAction();
                    /** wifi状态改变 */
                    if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(action)) {
                        if (mWLANStateListener != null) {
                            Log.e("zhang", "WLANBroadcastReceiver --> onReceive--> WIFI_STATE_CHANGED_ACTION");
                            mWLANStateListener.onStateChanged();
                        }
                    }
                    /** * WIFI_STATE_DISABLED WLAN已经关闭 * WIFI_STATE_DISABLING WLAN正在关闭 * WIFI_STATE_ENABLED WLAN已经打开 * WIFI_STATE_ENABLING WLAN正在打开 * WIFI_STATE_UNKNOWN 未知 */
                    int state = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);
                    switch (state) {
                        case WifiManager.WIFI_STATE_DISABLED:
                            if (mWLANStateListener != null) {
                                Log.e("zhang", "WLANBroadcastReceiver --> onReceive--> WIFI_STATE_DISABLED");
                                mWLANStateListener.onStateDisabled();
                            }
                            break;
                        case WifiManager.WIFI_STATE_DISABLING:
                            if (mWLANStateListener != null) {
                                Log.e("zhang", "WLANBroadcastReceiver --> onReceive--> WIFI_STATE_DISABLING");
                                mWLANStateListener.onStateDisabling();
                            }
                            break;
                        case WifiManager.WIFI_STATE_ENABLED:
                            if (mWLANStateListener != null) {
                                Log.e("zhang", "WLANBroadcastReceiver --> onReceive--> WIFI_STATE_ENABLED");
                                mWLANStateListener.onStateEnabled();
                            }
                            break;
                        case WifiManager.WIFI_STATE_ENABLING:
                            if (mWLANStateListener != null) {
                                Log.e("zhang", "WLANBroadcastReceiver --> onReceive--> WIFI_STATE_ENABLING");
                                mWLANStateListener.onStateEnabling();
                            }
                            break;
                        case WifiManager.WIFI_STATE_UNKNOWN:
                            if (mWLANStateListener != null) {
                                Log.e("zhang", "WLANBroadcastReceiver --> onReceive--> WIFI_STATE_UNKNOWN");
                                mWLANStateListener.onStateUnknow();
                            }
                            break;
                    }
                }
            }
        }
    
    
        public interface WLANStateListener { 
            void onStateChanged();
    
            void onStateDisabled();
    
            void onStateDisabling();
    
            void onStateEnabled();
    
            void onStateEnabling();
    
            void onStateUnknow();
    
        }
    }

在MianActivity中调用：

public class MainActivity extends AppCompatActivity { 
    
        private WLANListener listener;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            listener = new WLANListener(this);
            listener.register(new WLANListener.WLANStateListener() {
                @Override
                public void onStateChanged() {
                    Log.e("zhang", "MainActivity --> onStateChanged--> ");
                }
    
                @Override
                public void onStateDisabled() {
                    Log.e("zhang", "MainActivity --> onStateDisabled--> ");
                }
    
                @Override
                public void onStateDisabling() {
                    Log.e("zhang", "MainActivity --> onStateDisabling--> ");
                }
    
                @Override
                public void onStateEnabled() {
                    Log.e("zhang", "MainActivity --> onStateEnabled--> ");
                }
    
                @Override
                public void onStateEnabling() {
                    Log.e("zhang", "MainActivity --> onStateEnabling--> ");
                }
    
                @Override
                public void onStateUnknow() {
                    Log.e("zhang", "MainActivity --> onStateUnknow--> ");
                }
            });
        }
    
        @Override
        protected void onDestroy() {
            if (listener != null) {
                listener.unregister();
            }
            super.onDestroy();
        }
    }