Wifi热点创建在Oreo中失败

Question

我正在Oreo AOSP中开发一个简单的系统应用程序，以使用预定义的SSID和预共享密钥打开wifi热点。

由于我的APP是作为系统应用程序构建的，因此需要反思。

MainActivity.java

public class MainActivity extends Activity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                boolean result = false;
                WifiManager mwifiManager;
                mwifiManager = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);

                try {
                        Method method = mwifiManager.getClass().getMethod("getWifiApConfiguration");
                        WifiConfiguration netconfig = (WifiConfiguration) method.invoke(mwifiManager);
                        netconfig.SSID = "DummyApp";
                        netconfig.preSharedKey = "1234567890";
                        netconfig.allowedKeyManagement.set(4);
                        mwifiManager.setWifiEnabled(false);
                        method = mwifiManager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class);
                        result = (boolean) method.invoke(mwifiManager, netconfig, true);
                        if (!result) {
                                Toast.makeText(this, "Hotspot creation failed", Toast.LENGTH_SHORT).show();
                        } else {
                                Toast.makeText(this, "Wifi Enabled", Toast.LENGTH_SHORT).show();
                        }
                } catch (Exception e) {
                        e.printStackTrace();
                }
                finish();
        }

        @Override
        protected void onResume() {
                super.onResume();
        }
}

AndroidManifest.xml

    android:protectionLevel="signature|privileged"
    android:sharedUserId="android.uid.system">
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

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

    <!-- for wifi  -->
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
    <uses-permission android:name="android.permission.WRITE_SETTINGS" />
    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
    <uses-permission android:name="android.permission.OVERRIDE_WIFI_CONFIG" />

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

Wifi应该打开但得到以下结果：

Toast消息：热点创建失败

Logcat：WifiManager：PACKAGE_NAME尝试调用setWifiApEnabled：enabled = true

update1：​​How to turn on/off wifi hotspot programmatically in Android 8.0 (Oreo)

我已经尝试了以上更改。它将在本地打开Hotspot，但没有自定义SSID和密码。

update2：从@ Mr.AF获得输入后。

Method setConfigMethod = mWifiManager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class);
                                                                                 ......code snip.........

netconfig.allowedKeyManagement.set(4);
Method Method = mWifiManager.getClass().getMethod("setWifiApConfiguration", WifiConfiguration.class);

HOTSPOT创建失败

Answer 1

要在Android Nougat中打开“便携式热点”，以下代码适用。

   Method method = mwifiManager.getClass().getMethod("getWifiApConfiguration");
   WifiConfiguration netconfig = (WifiConfiguration) method.invoke(mwifiManager);
   method = mwifiManager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class);
   result = (boolean) method.invoke(mwifiManager, netconfig, true);

在Oreo中不推荐使用上述API。

以下是oreo中的@system隐藏API，如果将android应用程序构建为系统应用程序，则只能访问以下API代码。就我而言，我可以使用以下API。

   ConnectivityManager oncm = (ConnectivityManager)ontext.getSystemService(Context.CONNECTIVITY_SERVICE);

   oncm.startTethering(ConnectivityManager.TETHERING_WIFI, true, new ConnectivityManager.OnStartTetheringCallback() {

   @Override
   public void onTetheringStarted() {
          super.onTetheringStarted();
          Log.i(TAG, "Hotspot is successfully opened");
   }

   @Override
   public void onTetheringFailed() {
          super.onTetheringFailed();
          Log.e(TAG, "Hotspot failed to open");
   }
 });

Answer 2

您不需要对版本使用反射> = Oreo。在android公开公开的API startLocalOnlyHotspot之后。我已经在Stackoveflow的question上详细解释了这个答案。