android wifi在休眠状态下始终保持wifi连接代码位置

实现Android设备在休眠状态下保持Wi-Fi连接，需要在应用程序中进行以下步骤：

1. 在应用程序清单文件中添加以下权限：

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

2. 使用WifiManager设置Wi-Fi连接：

WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiConfiguration wifiConfig = new WifiConfiguration();
wifiConfig.SSID = "your_ssid";
wifiConfig.preSharedKey = "your_password";
wifiManager.addNetwork(wifiConfig);
wifiManager.enableNetwork(wifiConfig.networkId, true);
wifiManager.reconnect();

3. 使用AlarmManager设置定期唤醒设备：

AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, WifiConnectReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), interval, pendingIntent);

4. 创建广播接收器，在设备唤醒时检查Wi-Fi连接状态并重新连接：

public class WifiConnectReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
        if (!wifiManager.isWifiEnabled()) {
            wifiManager.setWifiEnabled(true);
        }
        WifiInfo wifiInfo = wifiManager.getConnectionInfo();
        if (wifiInfo != null && wifiInfo.getNetworkId() != -1) {
            wifiManager.reassociate();
        }
    }
}

需要注意的是，这段代码可以在任何位置调用，例如Activity或Service中。