安卓WifiLock在安卓上无法正常工作

Question

我想在连接到一个接入点后锁定WiFi，但是设备会在2到3分钟后切换到另一个网络。这是我的尝试方法。

        private static final String TAG = BuildConfig.APPLICATION_ID + ":WAKE_LOCK_TAG";
    public MyWifiManager(){
        mWifiLock = ((WifiManager) App.getContext().getApplicationContext().getSystemService(Context.WIFI_SERVICE)).createWifiLock(WifiManager.WIFI_MODE_FULL_HIGH_PERF ,"MyWifiManager:mWifiLock");
        PowerManager powerManager = (PowerManager) App.getContext().getSystemService(App.getContext().POWER_SERVICE);
        wakeLock = powerManager.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, TAG)
    }


    public void acquireWifiLock(){
        if (mWifiLock != null && !mWifiLock.isHeld()){
            mWifiLock.acquire();
        }
    }

    public void releaseWifiLock() {
        if( mWifiLock != null && mWifiLock.isHeld() ){
            mWifiLock.release();
        }
    }   

    public void acquireWakeLock(){
        if (wakeLock != null && !wakeLock.isHeld()){
            wakeLock.acquire();
        }
    }

    public void releaseWakeLock() {
        if( wakeLock != null && wakeLock.isHeld() ){
            wakeLock.release();
        }
    }   

这是我的清单文件。

    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE " />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

- Mohammad Abu Bakar Hussain

---

你为什么重复权限？ - Lakhwinder Singh

哦！这就是WifiLock无法工作的唯一原因吗？ - Mohammad Abu Bakar Hussain

not that for your problem - Lakhwinder Singh

Answer 1

WifiLock有不同的用途。它用于保持Wi-Fi无线电开启，而不是锁定到特定网络。

参考：https://developer.android.com/reference/android/net/wifi/WifiManager.WifiLock

- vishalm

Answer 2

试试这个：

WifiManager wm = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
        wifiLock = wm.createWifiLock(WifiManager.WIFI_MODE_FULL_HIGH_PERF , "MyWifiLock");
        wifiLock.acquire();
        PowerManager pm = (PowerManager) getApplicationContext().getSystemService(Context.POWER_SERVICE);
        wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyWakeLock");
        wakeLock.acquire();

并在 onDestroy 方法中释放锁：

if (wakeLock != null) {
            if (wakeLock.isHeld()) {
                wakeLock.release();
            }
        }
        if (wifiLock != null) {
            if (wifiLock.isHeld()) {
                wifiLock.release();
            }
        }

- mohammadReza Abiri

---

这是我的错误，我没有在描述中添加PowerManager的wake lock代码。现在已经更新了。 - Mohammad Abu Bakar Hussain