博客

1、权限

    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <!-- 获取WIFI信息状态的权限 -->
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

动态权限，不然getBssId()不对

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

2、注册广播

    /**
     * Wifi 状态监听注册
     */
    private void registerWifiReceiver() {
        if (mWifiReceiver == null) return;
        IntentFilter filter = new IntentFilter();
        filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
        filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
        registerReceiver(mWifiReceiver, filter);
    }

3、广播监听

    private class WifiReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)) {
                NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
                if (info.getState().equals(NetworkInfo.State.DISCONNECTED)) {
                    Constant.wifiInfo = null;
                    ToastUtil.show("断开wifi");
                } else if (info.getState().equals(NetworkInfo.State.CONNECTED)) {
                    if (info.getType() == ConnectivityManager.TYPE_WIFI) {
                        WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
                        Constant.wifiInfo = wifiManager.getConnectionInfo();
                        ToastUtil.show("连接wifi");
                    }
                }
            }
        }
    }

4、注销广播

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mWifiReceiver != null) {
            unregisterReceiver(mWifiReceiver);
        }
    }