Question

当我尝试在android设备api＆gt; = 23上运行android wifi热点programmaticaly时，它不起作用，直到我降低targetSdkVersion小于23.我想这是因为Marshmallow中引入的运行时权限。但我没有找到什么样的运行时权限我应该要求打开/关闭wifi热点。我用这个类控制wifi热点：

public class ApManager {
//check whether wifi hotspot on or off
public static boolean isApOn(Context context) {
    WifiManager wifimanager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
    try {
        Method method = wifimanager.getClass().getDeclaredMethod("isWifiApEnabled");
        method.setAccessible(true);
        return (Boolean) method.invoke(wifimanager);
    }
    catch (Throwable ignored) {}
    return false;
}

// toggle wifi hotspot on
public static boolean turnHotSpotOn(Context context) {
    if(isApOn(context)) {
        return true;
    }
    WifiManager wifimanager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
    WifiConfiguration wc = new WifiConfiguration();

    wc.allowedAuthAlgorithms.clear();
    wc.allowedGroupCiphers.clear();
    wc.allowedKeyManagement.clear();
    wc.allowedPairwiseCiphers.clear();
    wc.allowedProtocols.clear();

    wc.SSID = "mynetwork";
    wc.preSharedKey  = "mypassword";
    wc.status = WifiConfiguration.Status.ENABLED;
    wc.hiddenSSID = false;

    wc.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
    wc.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
    wc.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
    wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
    wc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
    wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
    wc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);

    int netId = wifimanager.addNetwork(wc);

    if (netId != -1 ) {
        wifimanager.enableNetwork(netId, true);
    }
    wifimanager.saveConfiguration();

    try {
        // if WiFi is on, turn it off
        if (wifimanager.isWifiEnabled()){
            wifimanager.setWifiEnabled(false);
        }

        Method method = wifimanager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class);
        method.invoke(wifimanager, wc, true);
        return true;

    }
    catch (Exception e) {
        e.printStackTrace();
    }
    return false;
}

// toggle wifi hotspot off
public static boolean turnHotSpotOff(Context context) {
    if(!isApOn(context)) {
        return true;
    }
    WifiManager wifimanager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);

    try {
        Method method = wifimanager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class);
        method.invoke(wifimanager, null, false);
        return true;
    }
    catch (Exception e) {
        e.printStackTrace();
    }
    return false;
}}

Answer 1

我明白了。要在Marshmallow及以上版本上使用WifiHotSpot，您应该使用此代码来请求写入权限：

  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                    if (!Settings.System.canWrite(getApplicationContext())) {
                        Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS, Uri.parse("package:" + getPackageName()));
                        startActivityForResult(intent, 200);

                    }
                }

Manifest.xml权限：

<uses-permission
    android:required="true"
    android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission
    android:required="true"
    android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission
    android:required="true"
    android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission  
    android:required="true"
    android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission
    android:required="true"
    android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission
    android:required="true"
    android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission
    android:required="true"
    android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission
    android:required="true"
    android:name="android.permission.INTERNET"/>
<uses-permission
    android:required="true"
    android:name="android.permission.WRITE_SETTINGS" />

如何使用targetSdkVersion＆gt; = 23更改android上的wifi热点状态？

1 个答案: