src/com/android/settings/vpn2/AppManagementFragment.java - LeafOS-Project/android_packages_apps_Settings - Gitiles

 /*
  * Copyright (C) 2016 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 package com.android.settings.vpn2;

 import static android.app.AppOpsManager.OP_ACTIVATE_PLATFORM_VPN;
 import static android.app.AppOpsManager.OP_ACTIVATE_VPN;

 import android.annotation.NonNull;
 import android.app.AppOpsManager;
 import android.app.Dialog;
 import android.app.admin.DevicePolicyManager;
 import android.app.settings.SettingsEnums;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.net.VpnManager;
 import android.os.Bundle;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.text.TextUtils;
 import android.util.Log;

 import androidx.annotation.VisibleForTesting;
 import androidx.appcompat.app.AlertDialog;
 import androidx.fragment.app.DialogFragment;
 import androidx.preference.Preference;

 import com.android.internal.net.VpnConfig;
 import com.android.internal.util.ArrayUtils;
 import com.android.settings.R;
 import com.android.settings.SettingsPreferenceFragment;
 import com.android.settings.core.SubSettingLauncher;
 import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settingslib.RestrictedLockUtils;
 import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
 import com.android.settingslib.RestrictedPreference;
 import com.android.settingslib.RestrictedSwitchPreference;

 import java.util.List;

 public class AppManagementFragment extends SettingsPreferenceFragment
         implements Preference.OnPreferenceChangeListener, Preference.OnPreferenceClickListener,
         ConfirmLockdownFragment.ConfirmLockdownListener {

     private static final String TAG = "AppManagementFragment";

     private static final String ARG_PACKAGE_NAME = "package";

     private static final String KEY_VERSION = "version";
     private static final String KEY_ALWAYS_ON_VPN = "always_on_vpn";
     private static final String KEY_LOCKDOWN_VPN = "lockdown_vpn";
     private static final String KEY_FORGET_VPN = "forget_vpn";

     private PackageManager mPackageManager;
     private DevicePolicyManager mDevicePolicyManager;
     private VpnManager mVpnManager;
     private AdvancedVpnFeatureProvider mFeatureProvider;

     // VPN app info
     private final int mUserId = UserHandle.myUserId();
     private String mPackageName;
     private PackageInfo mPackageInfo;
     private String mVpnLabel;

     // UI preference
     private Preference mPreferenceVersion;
     private RestrictedSwitchPreference mPreferenceAlwaysOn;
     private RestrictedSwitchPreference mPreferenceLockdown;
     private RestrictedPreference mPreferenceForget;

     // Listener
     private final AppDialogFragment.Listener mForgetVpnDialogFragmentListener =
             new AppDialogFragment.Listener() {
         @Override
         public void onForget() {
             // Unset always-on-vpn when forgetting the VPN
             if (isVpnAlwaysOn()) {
                 setAlwaysOnVpn(false, false);
             }
             // Also dismiss and go back to VPN list
             finish();
         }

         @Override
         public void onCancel() {
             // do nothing
         }
     };

     public static void show(Context context, AppPreference pref, int sourceMetricsCategory) {
         final Bundle args = new Bundle();
         args.putString(ARG_PACKAGE_NAME, pref.getPackageName());
         new SubSettingLauncher(context)
                 .setDestination(AppManagementFragment.class.getName())
                 .setArguments(args)
                 .setTitleText(pref.getLabel())
                 .setSourceMetricsCategory(sourceMetricsCategory)
                 .setUserHandle(new UserHandle(pref.getUserId()))
                 .launch();
     }

     @Override
     public void onCreate(Bundle savedState) {
         super.onCreate(savedState);
         addPreferencesFromResource(R.xml.vpn_app_management);

         mPackageManager = getContext().getPackageManager();
         mDevicePolicyManager = getContext().getSystemService(DevicePolicyManager.class);
         mVpnManager = getContext().getSystemService(VpnManager.class);
         mFeatureProvider = FeatureFactory.getFeatureFactory().getAdvancedVpnFeatureProvider();

         mPreferenceVersion = findPreference(KEY_VERSION);
         mPreferenceAlwaysOn = (RestrictedSwitchPreference) findPreference(KEY_ALWAYS_ON_VPN);
         mPreferenceLockdown = (RestrictedSwitchPreference) findPreference(KEY_LOCKDOWN_VPN);
         mPreferenceForget = (RestrictedPreference) findPreference(KEY_FORGET_VPN);

         mPreferenceAlwaysOn.setOnPreferenceChangeListener(this);
         mPreferenceLockdown.setOnPreferenceChangeListener(this);
         mPreferenceForget.setOnPreferenceClickListener(this);
     }

     @Override
     public void onResume() {
         super.onResume();

         boolean isInfoLoaded = loadInfo();
         if (isInfoLoaded) {
             mPreferenceVersion.setSummary(mPackageInfo.versionName);
             updateUI();
         } else {
             finish();
         }
     }

     @Override
     public boolean onPreferenceClick(Preference preference) {
         String key = preference.getKey();
         switch (key) {
             case KEY_FORGET_VPN:
                 return onForgetVpnClick();
             default:
                 Log.w(TAG, "unknown key is clicked: " + key);
                 return false;
         }
     }

     @Override
     public boolean onPreferenceChange(Preference preference, Object newValue) {
         switch (preference.getKey()) {
             case KEY_ALWAYS_ON_VPN:
                 return onAlwaysOnVpnClick((Boolean) newValue, mPreferenceLockdown.isChecked());
             case KEY_LOCKDOWN_VPN:
                 return onAlwaysOnVpnClick(mPreferenceAlwaysOn.isChecked(), (Boolean) newValue);
             default:
                 Log.w(TAG, "unknown key is clicked: " + preference.getKey());
                 return false;
         }
     }

     @Override
     public int getMetricsCategory() {
         return SettingsEnums.VPN_APP_MANAGEMENT;
     }

     private boolean onForgetVpnClick() {
         updateRestrictedViews();
         if (!mPreferenceForget.isEnabled()) {
             return false;
         }
         AppDialogFragment.show(this, mForgetVpnDialogFragmentListener, mPackageInfo, mVpnLabel,
                 true /* editing */, true);
         return true;
     }

     private boolean onAlwaysOnVpnClick(final boolean alwaysOnSetting, final boolean lockdown) {
         final boolean replacing = isAnotherVpnActive();
         final boolean wasLockdown = VpnUtils.isAnyLockdownActive(getActivity());
         if (ConfirmLockdownFragment.shouldShow(replacing, wasLockdown, lockdown)) {
             // Place a dialog to confirm that traffic should be locked down.
             final Bundle options = null;
             ConfirmLockdownFragment.show(
                     this, replacing, alwaysOnSetting, wasLockdown, lockdown, options);
             return false;
         }
         // No need to show the dialog. Change the setting straight away.
         return setAlwaysOnVpnByUI(alwaysOnSetting, lockdown);
     }

     @Override
     public void onConfirmLockdown(Bundle options, boolean isEnabled, boolean isLockdown) {
         setAlwaysOnVpnByUI(isEnabled, isLockdown);
     }

     private boolean setAlwaysOnVpnByUI(boolean isEnabled, boolean isLockdown) {
         updateRestrictedViews();
         if (!mPreferenceAlwaysOn.isEnabled()) {
             return false;
         }
         // Only clear legacy lockdown vpn in system user.
         if (mUserId == UserHandle.USER_SYSTEM) {
             VpnUtils.clearLockdownVpn(getContext());
         }
         final boolean success = setAlwaysOnVpn(isEnabled, isLockdown);
         if (isEnabled && (!success || !isVpnAlwaysOn())) {
             CannotConnectFragment.show(this, mVpnLabel);
         } else {
             updateUI();
         }
         return success;
     }

     private boolean setAlwaysOnVpn(boolean isEnabled, boolean isLockdown) {
         return mVpnManager.setAlwaysOnVpnPackageForUser(mUserId,
                 isEnabled ? mPackageName : null, isLockdown, /* lockdownAllowlist */ null);
     }

     private void updateUI() {
         if (isAdded()) {
             final boolean alwaysOn = isVpnAlwaysOn();
             final boolean lockdown = alwaysOn
                     && VpnUtils.isAnyLockdownActive(getActivity());

             mPreferenceAlwaysOn.setChecked(alwaysOn);
             mPreferenceLockdown.setChecked(lockdown);
             updateRestrictedViews();
         }
     }

     @VisibleForTesting
     void updateRestrictedViews() {
         if (mFeatureProvider.isAdvancedVpnSupported(getContext())
                 && !mFeatureProvider.isAdvancedVpnRemovable()
                 && TextUtils.equals(mPackageName, mFeatureProvider.getAdvancedVpnPackageName())) {
             mPreferenceForget.setVisible(false);
         } else {
             mPreferenceForget.setVisible(true);
         }

         if (isAdded()) {
             mPreferenceAlwaysOn.checkRestrictionAndSetDisabled(UserManager.DISALLOW_CONFIG_VPN,
                     mUserId);
             mPreferenceLockdown.checkRestrictionAndSetDisabled(UserManager.DISALLOW_CONFIG_VPN,
                     mUserId);
             mPreferenceForget.checkRestrictionAndSetDisabled(UserManager.DISALLOW_CONFIG_VPN,
                     mUserId);

             if (mPackageName.equals(mDevicePolicyManager.getAlwaysOnVpnPackage())) {
                 EnforcedAdmin admin = RestrictedLockUtils.getProfileOrDeviceOwner(
                         getContext(), UserHandle.of(mUserId));
                 mPreferenceAlwaysOn.setDisabledByAdmin(admin);
                 mPreferenceForget.setDisabledByAdmin(admin);
                 if (mDevicePolicyManager.isAlwaysOnVpnLockdownEnabled()) {
                     mPreferenceLockdown.setDisabledByAdmin(admin);
                 }
             }
             if (mVpnManager.isAlwaysOnVpnPackageSupportedForUser(mUserId, mPackageName)) {
                 // setSummary doesn't override the admin message when user restriction is applied
                 mPreferenceAlwaysOn.setSummary(R.string.vpn_always_on_summary);
                 // setEnabled is not required here, as checkRestrictionAndSetDisabled
                 // should have refreshed the enable state.
             } else {
                 mPreferenceAlwaysOn.setEnabled(false);
                 mPreferenceLockdown.setEnabled(false);
                 mPreferenceAlwaysOn.setSummary(R.string.vpn_always_on_summary_not_supported);
             }
         }
     }

     @VisibleForTesting
     void init(String packageName, AdvancedVpnFeatureProvider featureProvider,
             RestrictedPreference preference) {
         mPackageName = packageName;
         mFeatureProvider = featureProvider;
         mPreferenceForget = preference;
     }

     private String getAlwaysOnVpnPackage() {
         return mVpnManager.getAlwaysOnVpnPackageForUser(mUserId);
     }

     private boolean isVpnAlwaysOn() {
         return mPackageName.equals(getAlwaysOnVpnPackage());
     }

     /**
      * @return false if the intent doesn't contain an existing package or can't retrieve activated
      * vpn info.
      */
     private boolean loadInfo() {
         final Bundle args = getArguments();
         if (args == null) {
             Log.e(TAG, "empty bundle");
             return false;
         }

         mPackageName = args.getString(ARG_PACKAGE_NAME);
         if (mPackageName == null) {
             Log.e(TAG, "empty package name");
             return false;
         }

         try {
             mPackageInfo = mPackageManager.getPackageInfo(mPackageName, /* PackageInfoFlags */ 0);
             mVpnLabel = VpnConfig.getVpnLabel(getPrefContext(), mPackageName).toString();
         } catch (NameNotFoundException nnfe) {
             Log.e(TAG, "package not found", nnfe);
             return false;
         }

         if (mPackageInfo.applicationInfo == null) {
             Log.e(TAG, "package does not include an application");
             return false;
         }
         if (!appHasVpnPermission(getContext(), mPackageInfo.applicationInfo)) {
             Log.e(TAG, "package didn't register VPN profile");
             return false;
         }

         return true;
     }

     @VisibleForTesting
     static boolean appHasVpnPermission(Context context, @NonNull ApplicationInfo application) {
         final AppOpsManager service =
                 (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
         final List<AppOpsManager.PackageOps> ops = service.getOpsForPackage(application.uid,
                 application.packageName, new int[]{OP_ACTIVATE_VPN, OP_ACTIVATE_PLATFORM_VPN});
         return !ArrayUtils.isEmpty(ops);
     }

     /**
      * @return {@code true} if another VPN (VpnService or legacy) is connected or set as always-on.
      */
     private boolean isAnotherVpnActive() {
         final VpnConfig config = mVpnManager.getVpnConfig(mUserId);
         return config != null && !TextUtils.equals(config.user, mPackageName);
     }

     public static class CannotConnectFragment extends InstrumentedDialogFragment {
         private static final String TAG = "CannotConnect";
         private static final String ARG_VPN_LABEL = "label";

         @Override
         public int getMetricsCategory() {
             return SettingsEnums.DIALOG_VPN_CANNOT_CONNECT;
         }

         public static void show(AppManagementFragment parent, String vpnLabel) {
             if (parent.getFragmentManager().findFragmentByTag(TAG) == null) {
                 final Bundle args = new Bundle();
                 args.putString(ARG_VPN_LABEL, vpnLabel);

                 final DialogFragment frag = new CannotConnectFragment();
                 frag.setArguments(args);
                 frag.show(parent.getFragmentManager(), TAG);
             }
         }

         @Override
         public Dialog onCreateDialog(Bundle savedInstanceState) {
             final String vpnLabel = getArguments().getString(ARG_VPN_LABEL);
             return new AlertDialog.Builder(getActivity())
                     .setTitle(getActivity().getString(R.string.vpn_cant_connect_title, vpnLabel))
                     .setMessage(getActivity().getString(R.string.vpn_cant_connect_message))
                     .setPositiveButton(R.string.okay, null)
                     .create();
         }
     }
 }
	/*
	* Copyright (C) 2016 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/
	package com.android.settings.vpn2;

	import static android.app.AppOpsManager.OP_ACTIVATE_PLATFORM_VPN;
	import static android.app.AppOpsManager.OP_ACTIVATE_VPN;

	import android.annotation.NonNull;
	import android.app.AppOpsManager;
	import android.app.Dialog;
	import android.app.admin.DevicePolicyManager;
	import android.app.settings.SettingsEnums;
	import android.content.Context;
	import android.content.pm.ApplicationInfo;
	import android.content.pm.PackageInfo;
	import android.content.pm.PackageManager;
	import android.content.pm.PackageManager.NameNotFoundException;
	import android.net.VpnManager;
	import android.os.Bundle;
	import android.os.UserHandle;
	import android.os.UserManager;
	import android.text.TextUtils;
	import android.util.Log;

	import androidx.annotation.VisibleForTesting;
	import androidx.appcompat.app.AlertDialog;
	import androidx.fragment.app.DialogFragment;
	import androidx.preference.Preference;

	import com.android.internal.net.VpnConfig;
	import com.android.internal.util.ArrayUtils;
	import com.android.settings.R;
	import com.android.settings.SettingsPreferenceFragment;
	import com.android.settings.core.SubSettingLauncher;
	import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
	import com.android.settings.overlay.FeatureFactory;
	import com.android.settingslib.RestrictedLockUtils;
	import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
	import com.android.settingslib.RestrictedPreference;
	import com.android.settingslib.RestrictedSwitchPreference;

	import java.util.List;

	public class AppManagementFragment extends SettingsPreferenceFragment
	implements Preference.OnPreferenceChangeListener, Preference.OnPreferenceClickListener,
	ConfirmLockdownFragment.ConfirmLockdownListener {

	private static final String TAG = "AppManagementFragment";

	private static final String ARG_PACKAGE_NAME = "package";

	private static final String KEY_VERSION = "version";
	private static final String KEY_ALWAYS_ON_VPN = "always_on_vpn";
	private static final String KEY_LOCKDOWN_VPN = "lockdown_vpn";
	private static final String KEY_FORGET_VPN = "forget_vpn";

	private PackageManager mPackageManager;
	private DevicePolicyManager mDevicePolicyManager;
	private VpnManager mVpnManager;
	private AdvancedVpnFeatureProvider mFeatureProvider;

	// VPN app info
	private final int mUserId = UserHandle.myUserId();
	private String mPackageName;
	private PackageInfo mPackageInfo;
	private String mVpnLabel;

	// UI preference
	private Preference mPreferenceVersion;
	private RestrictedSwitchPreference mPreferenceAlwaysOn;
	private RestrictedSwitchPreference mPreferenceLockdown;
	private RestrictedPreference mPreferenceForget;

	// Listener
	private final AppDialogFragment.Listener mForgetVpnDialogFragmentListener =
	new AppDialogFragment.Listener() {
	@Override
	public void onForget() {
	// Unset always-on-vpn when forgetting the VPN
	if (isVpnAlwaysOn()) {
	setAlwaysOnVpn(false, false);
	}
	// Also dismiss and go back to VPN list
	finish();
	}

	@Override
	public void onCancel() {
	// do nothing
	}
	};

	public static void show(Context context, AppPreference pref, int sourceMetricsCategory) {
	final Bundle args = new Bundle();
	args.putString(ARG_PACKAGE_NAME, pref.getPackageName());
	new SubSettingLauncher(context)
	.setDestination(AppManagementFragment.class.getName())
	.setArguments(args)
	.setTitleText(pref.getLabel())
	.setSourceMetricsCategory(sourceMetricsCategory)
	.setUserHandle(new UserHandle(pref.getUserId()))
	.launch();
	}

	@Override
	public void onCreate(Bundle savedState) {
	super.onCreate(savedState);
	addPreferencesFromResource(R.xml.vpn_app_management);

	mPackageManager = getContext().getPackageManager();
	mDevicePolicyManager = getContext().getSystemService(DevicePolicyManager.class);
	mVpnManager = getContext().getSystemService(VpnManager.class);
	mFeatureProvider = FeatureFactory.getFeatureFactory().getAdvancedVpnFeatureProvider();

	mPreferenceVersion = findPreference(KEY_VERSION);
	mPreferenceAlwaysOn = (RestrictedSwitchPreference) findPreference(KEY_ALWAYS_ON_VPN);
	mPreferenceLockdown = (RestrictedSwitchPreference) findPreference(KEY_LOCKDOWN_VPN);
	mPreferenceForget = (RestrictedPreference) findPreference(KEY_FORGET_VPN);

	mPreferenceAlwaysOn.setOnPreferenceChangeListener(this);
	mPreferenceLockdown.setOnPreferenceChangeListener(this);
	mPreferenceForget.setOnPreferenceClickListener(this);
	}

	@Override
	public void onResume() {
	super.onResume();

	boolean isInfoLoaded = loadInfo();
	if (isInfoLoaded) {
	mPreferenceVersion.setSummary(mPackageInfo.versionName);
	updateUI();
	} else {
	finish();
	}
	}

	@Override
	public boolean onPreferenceClick(Preference preference) {
	String key = preference.getKey();
	switch (key) {
	case KEY_FORGET_VPN:
	return onForgetVpnClick();
	default:
	Log.w(TAG, "unknown key is clicked: " + key);
	return false;
	}
	}

	@Override
	public boolean onPreferenceChange(Preference preference, Object newValue) {
	switch (preference.getKey()) {
	case KEY_ALWAYS_ON_VPN:
	return onAlwaysOnVpnClick((Boolean) newValue, mPreferenceLockdown.isChecked());
	case KEY_LOCKDOWN_VPN:
	return onAlwaysOnVpnClick(mPreferenceAlwaysOn.isChecked(), (Boolean) newValue);
	default:
	Log.w(TAG, "unknown key is clicked: " + preference.getKey());
	return false;
	}
	}

	@Override
	public int getMetricsCategory() {
	return SettingsEnums.VPN_APP_MANAGEMENT;
	}

	private boolean onForgetVpnClick() {
	updateRestrictedViews();
	if (!mPreferenceForget.isEnabled()) {
	return false;
	}
	AppDialogFragment.show(this, mForgetVpnDialogFragmentListener, mPackageInfo, mVpnLabel,
	true /* editing */, true);
	return true;
	}

	private boolean onAlwaysOnVpnClick(final boolean alwaysOnSetting, final boolean lockdown) {
	final boolean replacing = isAnotherVpnActive();
	final boolean wasLockdown = VpnUtils.isAnyLockdownActive(getActivity());
	if (ConfirmLockdownFragment.shouldShow(replacing, wasLockdown, lockdown)) {
	// Place a dialog to confirm that traffic should be locked down.
	final Bundle options = null;
	ConfirmLockdownFragment.show(
	this, replacing, alwaysOnSetting, wasLockdown, lockdown, options);
	return false;
	}
	// No need to show the dialog. Change the setting straight away.
	return setAlwaysOnVpnByUI(alwaysOnSetting, lockdown);
	}

	@Override
	public void onConfirmLockdown(Bundle options, boolean isEnabled, boolean isLockdown) {
	setAlwaysOnVpnByUI(isEnabled, isLockdown);
	}

	private boolean setAlwaysOnVpnByUI(boolean isEnabled, boolean isLockdown) {
	updateRestrictedViews();
	if (!mPreferenceAlwaysOn.isEnabled()) {
	return false;
	}
	// Only clear legacy lockdown vpn in system user.
	if (mUserId == UserHandle.USER_SYSTEM) {
	VpnUtils.clearLockdownVpn(getContext());
	}
	final boolean success = setAlwaysOnVpn(isEnabled, isLockdown);
	if (isEnabled && (!success \|\| !isVpnAlwaysOn())) {
	CannotConnectFragment.show(this, mVpnLabel);
	} else {
	updateUI();
	}
	return success;
	}

	private boolean setAlwaysOnVpn(boolean isEnabled, boolean isLockdown) {
	return mVpnManager.setAlwaysOnVpnPackageForUser(mUserId,
	isEnabled ? mPackageName : null, isLockdown, /* lockdownAllowlist */ null);
	}

	private void updateUI() {
	if (isAdded()) {
	final boolean alwaysOn = isVpnAlwaysOn();
	final boolean lockdown = alwaysOn
	&& VpnUtils.isAnyLockdownActive(getActivity());

	mPreferenceAlwaysOn.setChecked(alwaysOn);
	mPreferenceLockdown.setChecked(lockdown);
	updateRestrictedViews();
	}
	}

	@VisibleForTesting
	void updateRestrictedViews() {
	if (mFeatureProvider.isAdvancedVpnSupported(getContext())
	&& !mFeatureProvider.isAdvancedVpnRemovable()
	&& TextUtils.equals(mPackageName, mFeatureProvider.getAdvancedVpnPackageName())) {
	mPreferenceForget.setVisible(false);
	} else {
	mPreferenceForget.setVisible(true);
	}

	if (isAdded()) {
	mPreferenceAlwaysOn.checkRestrictionAndSetDisabled(UserManager.DISALLOW_CONFIG_VPN,
	mUserId);
	mPreferenceLockdown.checkRestrictionAndSetDisabled(UserManager.DISALLOW_CONFIG_VPN,
	mUserId);
	mPreferenceForget.checkRestrictionAndSetDisabled(UserManager.DISALLOW_CONFIG_VPN,
	mUserId);

	if (mPackageName.equals(mDevicePolicyManager.getAlwaysOnVpnPackage())) {
	EnforcedAdmin admin = RestrictedLockUtils.getProfileOrDeviceOwner(
	getContext(), UserHandle.of(mUserId));
	mPreferenceAlwaysOn.setDisabledByAdmin(admin);
	mPreferenceForget.setDisabledByAdmin(admin);
	if (mDevicePolicyManager.isAlwaysOnVpnLockdownEnabled()) {
	mPreferenceLockdown.setDisabledByAdmin(admin);
	}
	}
	if (mVpnManager.isAlwaysOnVpnPackageSupportedForUser(mUserId, mPackageName)) {
	// setSummary doesn't override the admin message when user restriction is applied
	mPreferenceAlwaysOn.setSummary(R.string.vpn_always_on_summary);
	// setEnabled is not required here, as checkRestrictionAndSetDisabled
	// should have refreshed the enable state.
	} else {
	mPreferenceAlwaysOn.setEnabled(false);
	mPreferenceLockdown.setEnabled(false);
	mPreferenceAlwaysOn.setSummary(R.string.vpn_always_on_summary_not_supported);
	}
	}
	}

	@VisibleForTesting
	void init(String packageName, AdvancedVpnFeatureProvider featureProvider,
	RestrictedPreference preference) {
	mPackageName = packageName;
	mFeatureProvider = featureProvider;
	mPreferenceForget = preference;
	}

	private String getAlwaysOnVpnPackage() {
	return mVpnManager.getAlwaysOnVpnPackageForUser(mUserId);
	}

	private boolean isVpnAlwaysOn() {
	return mPackageName.equals(getAlwaysOnVpnPackage());
	}

	/**
	* @return false if the intent doesn't contain an existing package or can't retrieve activated
	* vpn info.
	*/
	private boolean loadInfo() {
	final Bundle args = getArguments();
	if (args == null) {
	Log.e(TAG, "empty bundle");
	return false;
	}

	mPackageName = args.getString(ARG_PACKAGE_NAME);
	if (mPackageName == null) {
	Log.e(TAG, "empty package name");
	return false;
	}

	try {
	mPackageInfo = mPackageManager.getPackageInfo(mPackageName, /* PackageInfoFlags */ 0);
	mVpnLabel = VpnConfig.getVpnLabel(getPrefContext(), mPackageName).toString();
	} catch (NameNotFoundException nnfe) {
	Log.e(TAG, "package not found", nnfe);
	return false;
	}

	if (mPackageInfo.applicationInfo == null) {
	Log.e(TAG, "package does not include an application");
	return false;
	}
	if (!appHasVpnPermission(getContext(), mPackageInfo.applicationInfo)) {
	Log.e(TAG, "package didn't register VPN profile");
	return false;
	}

	return true;
	}

	@VisibleForTesting
	static boolean appHasVpnPermission(Context context, @NonNull ApplicationInfo application) {
	final AppOpsManager service =
	(AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
	final List<AppOpsManager.PackageOps> ops = service.getOpsForPackage(application.uid,
	application.packageName, new int[]{OP_ACTIVATE_VPN, OP_ACTIVATE_PLATFORM_VPN});
	return !ArrayUtils.isEmpty(ops);
	}

	/**
	* @return {@code true} if another VPN (VpnService or legacy) is connected or set as always-on.
	*/
	private boolean isAnotherVpnActive() {
	final VpnConfig config = mVpnManager.getVpnConfig(mUserId);
	return config != null && !TextUtils.equals(config.user, mPackageName);
	}

	public static class CannotConnectFragment extends InstrumentedDialogFragment {
	private static final String TAG = "CannotConnect";
	private static final String ARG_VPN_LABEL = "label";

	@Override
	public int getMetricsCategory() {
	return SettingsEnums.DIALOG_VPN_CANNOT_CONNECT;
	}

	public static void show(AppManagementFragment parent, String vpnLabel) {
	if (parent.getFragmentManager().findFragmentByTag(TAG) == null) {
	final Bundle args = new Bundle();
	args.putString(ARG_VPN_LABEL, vpnLabel);

	final DialogFragment frag = new CannotConnectFragment();
	frag.setArguments(args);
	frag.show(parent.getFragmentManager(), TAG);
	}
	}

	@Override
	public Dialog onCreateDialog(Bundle savedInstanceState) {
	final String vpnLabel = getArguments().getString(ARG_VPN_LABEL);
	return new AlertDialog.Builder(getActivity())
	.setTitle(getActivity().getString(R.string.vpn_cant_connect_title, vpnLabel))
	.setMessage(getActivity().getString(R.string.vpn_cant_connect_message))
	.setPositiveButton(R.string.okay, null)
	.create();
	}
	}
	}