Merge "Move the Private DNS dialog back to the top level." into pi-dev
diff --git a/res/xml/network_and_internet.xml b/res/xml/network_and_internet.xml
index a28b1e6..ee99998 100644
--- a/res/xml/network_and_internet.xml
+++ b/res/xml/network_and_internet.xml
@@ -18,7 +18,8 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:settings="http://schemas.android.com/apk/res-auto"
     android:key="network_and_internet_screen"
-    android:title="@string/network_dashboard_title">
+    android:title="@string/network_dashboard_title"
+    settings:initialExpandedChildrenCount="5">
 
     <com.android.settings.widget.MasterSwitchPreference
         android:fragment="com.android.settings.wifi.WifiSettings"
@@ -59,19 +60,10 @@
         settings:useAdminDisabledSummary="true" />
 
     <com.android.settingslib.RestrictedPreference
-        android:fragment="com.android.settings.vpn2.VpnSettings"
-        android:key="vpn_settings"
-        android:title="@string/vpn_settings_title"
-        android:icon="@drawable/ic_vpn_key"
-        android:order="0"
-        android:summary="@string/summary_placeholder"
-        settings:userRestriction="no_config_vpn"
-        settings:useAdminDisabledSummary="true" />
-
-    <com.android.settingslib.RestrictedPreference
         android:key="manage_mobile_plan"
         android:title="@string/manage_mobile_plan_title"
         android:persistent="false"
+        android:order="0"
         settings:userRestriction="no_config_mobile_networks"
         settings:useAdminDisabledSummary="true" />
 
@@ -88,4 +80,22 @@
         android:key="proxy_settings"
         android:title="@string/proxy_settings_title" />
 
-</PreferenceScreen>
\ No newline at end of file
+    <com.android.settingslib.RestrictedPreference
+        android:fragment="com.android.settings.vpn2.VpnSettings"
+        android:key="vpn_settings"
+        android:title="@string/vpn_settings_title"
+        android:icon="@drawable/ic_vpn_key"
+        android:order="10"
+        android:summary="@string/summary_placeholder"
+        settings:userRestriction="no_config_vpn"
+        settings:useAdminDisabledSummary="true" />
+
+    <com.android.settings.network.PrivateDnsModeDialogPreference
+        android:key="private_dns_settings"
+        android:title="@string/select_private_dns_configuration_title"
+        android:order="15"
+        android:dialogTitle="@string/select_private_dns_configuration_dialog_title"
+        android:dialogLayout="@layout/private_dns_mode_dialog"
+        android:positiveButtonText="@string/save" />
+
+</PreferenceScreen>
diff --git a/src/com/android/settings/network/NetworkDashboardFragment.java b/src/com/android/settings/network/NetworkDashboardFragment.java
index 7d8ea18..955c503 100644
--- a/src/com/android/settings/network/NetworkDashboardFragment.java
+++ b/src/com/android/settings/network/NetworkDashboardFragment.java
@@ -49,10 +49,8 @@
 
     private static final String TAG = "NetworkDashboardFrag";
     private static final int MENU_NETWORK_RESET = Menu.FIRST;
-    private static final int MENU_PRIVATE_DNS = Menu.FIRST + 1;
 
     private NetworkResetActionMenuController mNetworkResetController;
-    private PrivateDnsMenuController mPrivateDnsMenuController;
 
     @Override
     public int getMetricsCategory() {
@@ -73,8 +71,6 @@
     public void onAttach(Context context) {
         super.onAttach(context);
         mNetworkResetController = new NetworkResetActionMenuController(context, MENU_NETWORK_RESET);
-        mPrivateDnsMenuController = new PrivateDnsMenuController(getFragmentManager(),
-                MENU_PRIVATE_DNS);
     }
 
     @Override
@@ -86,7 +82,6 @@
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         super.onCreateOptionsMenu(menu, inflater);
         mNetworkResetController.buildMenuItem(menu);
-        mPrivateDnsMenuController.buildMenuItem(menu);
     }
 
     @Override
@@ -109,6 +104,8 @@
                 new MobileNetworkPreferenceController(context);
         final VpnPreferenceController vpnPreferenceController =
                 new VpnPreferenceController(context);
+        final PrivateDnsPreferenceController privateDnsPreferenceController =
+                new PrivateDnsPreferenceController(context);
 
         if (lifecycle != null) {
             lifecycle.addObserver(airplaneModePreferenceController);
@@ -116,6 +113,7 @@
             lifecycle.addObserver(wifiPreferenceController);
             lifecycle.addObserver(mobileNetworkPreferenceController);
             lifecycle.addObserver(vpnPreferenceController);
+            lifecycle.addObserver(privateDnsPreferenceController);
         }
 
         final List<AbstractPreferenceController> controllers = new ArrayList<>();
@@ -126,6 +124,7 @@
         controllers.add(new ProxyPreferenceController(context));
         controllers.add(mobilePlanPreferenceController);
         controllers.add(wifiPreferenceController);
+        controllers.add(privateDnsPreferenceController);
         return controllers;
     }
 
diff --git a/src/com/android/settings/network/PrivateDnsMenuController.java b/src/com/android/settings/network/PrivateDnsMenuController.java
deleted file mode 100644
index a811775..0000000
--- a/src/com/android/settings/network/PrivateDnsMenuController.java
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright (C) 2017 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.network;
-
-import android.app.FragmentManager;
-import android.view.Menu;
-import android.view.MenuItem;
-
-import com.android.settings.R;
-
-public class PrivateDnsMenuController {
-    private final FragmentManager mFragmentManager;
-    private final int mMenuId;
-
-    public PrivateDnsMenuController(FragmentManager fragmentManager, int menuId) {
-        mFragmentManager = fragmentManager;
-        mMenuId = menuId;
-    }
-
-    public void buildMenuItem(Menu menu) {
-        if (menu != null) {
-            MenuItem item = menu.add(0 /* groupId */, mMenuId, 0 /* order */,
-                    R.string.select_private_dns_configuration_title);
-            item.setOnMenuItemClickListener(target -> {
-                PrivateDnsModeDialogFragment.show(mFragmentManager);
-                return true;
-            });
-        }
-    }
-}
diff --git a/src/com/android/settings/network/PrivateDnsModeDialogFragment.java b/src/com/android/settings/network/PrivateDnsModeDialogPreference.java
similarity index 71%
rename from src/com/android/settings/network/PrivateDnsModeDialogFragment.java
rename to src/com/android/settings/network/PrivateDnsModeDialogPreference.java
index 00950c3..3b09cc2 100644
--- a/src/com/android/settings/network/PrivateDnsModeDialogFragment.java
+++ b/src/com/android/settings/network/PrivateDnsModeDialogPreference.java
@@ -20,19 +20,18 @@
 import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_PROVIDER_HOSTNAME;
 
 import android.app.AlertDialog;
-import android.app.Dialog;
-import android.app.FragmentManager;
+import android.content.ActivityNotFoundException;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.os.Bundle;
 import android.provider.Settings;
 import android.support.annotation.VisibleForTesting;
 import android.text.Editable;
 import android.text.TextWatcher;
 import android.text.method.LinkMovementMethod;
-import android.view.LayoutInflater;
+import android.util.AttributeSet;
+import android.util.Log;
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
@@ -41,8 +40,9 @@
 
 import com.android.internal.logging.nano.MetricsProto;
 import com.android.settings.R;
-import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
+import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.utils.AnnotationSpan;
+import com.android.settingslib.CustomDialogPreference;
 import com.android.settingslib.HelpUtils;
 
 import java.util.HashMap;
@@ -51,7 +51,7 @@
 /**
  * Dialog to set the private dns
  */
-public class PrivateDnsModeDialogFragment extends InstrumentedDialogFragment implements
+public class PrivateDnsModeDialogPreference extends CustomDialogPreference implements
         DialogInterface.OnClickListener, RadioGroup.OnCheckedChangeListener, TextWatcher {
 
     public static final String ANNOTATION_URL = "url";
@@ -77,41 +77,44 @@
     @VisibleForTesting
     RadioGroup mRadioGroup;
     @VisibleForTesting
-    Button mSaveButton;
-    @VisibleForTesting
     String mMode;
 
-    public static void show(FragmentManager fragmentManager) {
-        if (fragmentManager.findFragmentByTag(TAG) == null) {
-            final PrivateDnsModeDialogFragment fragment = new PrivateDnsModeDialogFragment();
-            fragment.show(fragmentManager, TAG);
-        }
+    public PrivateDnsModeDialogPreference(Context context) {
+        super(context);
     }
 
+    public PrivateDnsModeDialogPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public PrivateDnsModeDialogPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public PrivateDnsModeDialogPreference(Context context, AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    private final AnnotationSpan.LinkInfo mUrlLinkInfo = new AnnotationSpan.LinkInfo(
+            ANNOTATION_URL, (widget) -> {
+        final Context context = widget.getContext();
+        final Intent intent = HelpUtils.getHelpIntent(context,
+                context.getString(R.string.help_uri_private_dns),
+                context.getClass().getName());
+        if (intent != null) {
+            try {
+                widget.startActivityForResult(intent, 0);
+            } catch (ActivityNotFoundException e) {
+                Log.w(TAG, "Activity was not found for intent, " + intent.toString());
+            }
+        }
+    });
+
     @Override
-    public Dialog onCreateDialog(Bundle savedInstanceState) {
+    protected void onBindDialogView(View view) {
         final Context context = getContext();
-
-        final AlertDialog dialog = new AlertDialog.Builder(context)
-                .setTitle(R.string.select_private_dns_configuration_title)
-                .setView(buildPrivateDnsView(context))
-                .setPositiveButton(R.string.save, this)
-                .setNegativeButton(R.string.dlg_cancel, null)
-                .create();
-
-        dialog.setOnShowListener(dialogInterface -> {
-            mSaveButton = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
-            updateDialogInfo();
-        });
-        return dialog;
-    }
-
-    private View buildPrivateDnsView(final Context context) {
         final ContentResolver contentResolver = context.getContentResolver();
-        mMode = Settings.Global.getString(contentResolver, MODE_KEY);
-        final View view = LayoutInflater.from(context).inflate(R.layout.private_dns_mode_dialog,
-                null);
-
         mEditText = view.findViewById(R.id.private_dns_mode_provider_hostname);
         mEditText.addTextChangedListener(this);
         mEditText.setText(Settings.Global.getString(contentResolver, HOSTNAME_KEY));
@@ -131,26 +134,20 @@
             helpTextView.setText(AnnotationSpan.linkify(
                     context.getText(R.string.private_dns_help_message), linkInfo));
         }
-
-        return view;
     }
 
     @Override
     public void onClick(DialogInterface dialog, int which) {
+        final Context context = getContext();
         if (mMode.equals(PRIVATE_DNS_MODE_PROVIDER_HOSTNAME)) {
             // Only clickable if hostname is valid, so we could save it safely
-            Settings.Global.putString(getContext().getContentResolver(), HOSTNAME_KEY,
+            Settings.Global.putString(context.getContentResolver(), HOSTNAME_KEY,
                     mEditText.getText().toString());
         }
 
-        mMetricsFeatureProvider.action(getContext(),
+        FeatureFactory.getFactory(context).getMetricsFeatureProvider().action(context,
                 MetricsProto.MetricsEvent.ACTION_PRIVATE_DNS_MODE, mMode);
-        Settings.Global.putString(getContext().getContentResolver(), MODE_KEY, mMode);
-    }
-
-    @Override
-    public int getMetricsCategory() {
-        return MetricsProto.MetricsEvent.DIALOG_PRIVATE_DNS;
+        Settings.Global.putString(context.getContentResolver(), MODE_KEY, mMode);
     }
 
     @Override
@@ -179,9 +176,7 @@
 
     @Override
     public void afterTextChanged(Editable s) {
-        if (mSaveButton != null) {
-            mSaveButton.setEnabled(isWeaklyValidatedHostname(mEditText.getText().toString()));
-        }
+        updateDialogInfo();
     }
 
     private boolean isWeaklyValidatedHostname(String hostname) {
@@ -193,17 +188,24 @@
         return hostname.matches(WEAK_HOSTNAME_REGEX);
     }
 
+    private Button getSaveButton() {
+        final AlertDialog dialog = (AlertDialog) getDialog();
+        if (dialog == null) {
+            return null;
+        }
+        return dialog.getButton(DialogInterface.BUTTON_POSITIVE);
+    }
+
     private void updateDialogInfo() {
         final boolean modeProvider = PRIVATE_DNS_MODE_PROVIDER_HOSTNAME.equals(mMode);
         if (mEditText != null) {
             mEditText.setEnabled(modeProvider);
         }
-        if (mSaveButton != null) {
-            mSaveButton.setEnabled(
-                    modeProvider
-                            ? isWeaklyValidatedHostname(mEditText.getText().toString())
-                            : true);
+        final Button saveButton = getSaveButton();
+        if (saveButton != null) {
+            saveButton.setEnabled(modeProvider
+                    ? isWeaklyValidatedHostname(mEditText.getText().toString())
+                    : true);
         }
     }
-
 }
diff --git a/src/com/android/settings/network/PrivateDnsPreferenceController.java b/src/com/android/settings/network/PrivateDnsPreferenceController.java
new file mode 100644
index 0000000..e317530
--- /dev/null
+++ b/src/com/android/settings/network/PrivateDnsPreferenceController.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2017 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.network;
+
+import android.content.Context;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+
+public class PrivateDnsPreferenceController extends BasePreferenceController
+        implements PreferenceControllerMixin, LifecycleObserver {
+    private static final String KEY_PRIVATE_DNS_SETTINGS = "private_dns_settings";
+
+    public PrivateDnsPreferenceController(Context context) {
+        super(context, KEY_PRIVATE_DNS_SETTINGS);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_PRIVATE_DNS_SETTINGS;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+}
diff --git a/src/com/android/settings/network/VpnPreferenceController.java b/src/com/android/settings/network/VpnPreferenceController.java
index 95513e0..c4ecf4f 100644
--- a/src/com/android/settings/network/VpnPreferenceController.java
+++ b/src/com/android/settings/network/VpnPreferenceController.java
@@ -180,13 +180,11 @@
             mNetworkCallback = new ConnectivityManager.NetworkCallback() {
         @Override
         public void onAvailable(Network network) {
-            Log.d(TAG, "onAvailable " + network.netId);
             updateSummary();
         }
 
         @Override
         public void onLost(Network network) {
-            Log.d(TAG, "onLost " + network.netId);
             updateSummary();
         }
     };
diff --git a/tests/robotests/src/com/android/settings/network/NetworkDashboardFragmentTest.java b/tests/robotests/src/com/android/settings/network/NetworkDashboardFragmentTest.java
index 19c9f87..51722e5 100644
--- a/tests/robotests/src/com/android/settings/network/NetworkDashboardFragmentTest.java
+++ b/tests/robotests/src/com/android/settings/network/NetworkDashboardFragmentTest.java
@@ -76,9 +76,7 @@
     public void testPrepareActionBar_networkResetShouldBeCreated() {
         final NetworkResetActionMenuController resetController =
                 mock(NetworkResetActionMenuController.class);
-        final PrivateDnsMenuController privateDnsController = mock(PrivateDnsMenuController.class);
         ReflectionHelpers.setField(mFragment, "mNetworkResetController", resetController);
-        ReflectionHelpers.setField(mFragment, "mPrivateDnsMenuController", privateDnsController);
 
         mFragment.onCreateOptionsMenu(null, null);
 
diff --git a/tests/robotests/src/com/android/settings/network/PrivateDnsMenuControllerTest.java b/tests/robotests/src/com/android/settings/network/PrivateDnsMenuControllerTest.java
deleted file mode 100644
index fa824d6..0000000
--- a/tests/robotests/src/com/android/settings/network/PrivateDnsMenuControllerTest.java
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copyright (C) 2017 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.network;
-
-import static org.mockito.Matchers.any;
-import static org.mockito.Matchers.anyInt;
-import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.when;
-
-import android.app.FragmentManager;
-import android.view.Menu;
-import android.view.MenuItem;
-
-import com.android.settings.R;
-import com.android.settings.testutils.SettingsRobolectricTestRunner;
-
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
-
-@RunWith(SettingsRobolectricTestRunner.class)
-public class PrivateDnsMenuControllerTest {
-    private static final int MENU_ID = 0;
-
-    private PrivateDnsMenuController mController;
-    @Mock
-    private Menu mMenu;
-    @Mock
-    private MenuItem mMenuItem;
-    @Mock
-    private FragmentManager mFragmentManager;
-
-    @Before
-    public void setUp() {
-        MockitoAnnotations.initMocks(this);
-
-        mController = new PrivateDnsMenuController(mFragmentManager, MENU_ID);
-        when(mMenu.add(anyInt(), anyInt(), anyInt(), anyInt())).thenReturn(mMenuItem);
-    }
-
-    @Test
-    public void buildMenuItem_available_shouldAddToMenu() {
-        mController.buildMenuItem(mMenu);
-
-        verify(mMenu).add(0 /* groupId */, MENU_ID, 0 /* order */,
-                R.string.select_private_dns_configuration_title);
-        verify(mMenuItem).setOnMenuItemClickListener(any(MenuItem.OnMenuItemClickListener.class));
-    }
-}
diff --git a/tests/robotests/src/com/android/settings/network/PrivateDnsModeDialogFragmentTest.java b/tests/robotests/src/com/android/settings/network/PrivateDnsModeDialogFragmentTest.java
deleted file mode 100644
index d490968..0000000
--- a/tests/robotests/src/com/android/settings/network/PrivateDnsModeDialogFragmentTest.java
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * Copyright (C) 2017 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.network;
-
-import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_OFF;
-import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_OPPORTUNISTIC;
-import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_PROVIDER_HOSTNAME;
-import static com.google.common.truth.Truth.assertThat;
-import static org.mockito.Mockito.doReturn;
-import static org.mockito.Mockito.spy;
-
-import android.content.Context;
-import android.provider.Settings;
-import android.widget.Button;
-
-import com.android.settings.R;
-import com.android.settings.testutils.SettingsRobolectricTestRunner;
-import com.android.settings.testutils.shadow.ShadowHelpUtils;
-
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.MockitoAnnotations;
-import org.robolectric.RuntimeEnvironment;
-import org.robolectric.annotation.Config;
-
-@RunWith(SettingsRobolectricTestRunner.class)
-@Config(shadows = ShadowHelpUtils.class)
-public class PrivateDnsModeDialogFragmentTest {
-
-    private static final String HOST_NAME = "192.168.1.1";
-    private static final String INVALID_HOST_NAME = "...,";
-
-    private Context mContext;
-    private PrivateDnsModeDialogFragment mFragment;
-    private Button mSaveButton;
-
-    @Before
-    public void setUp() {
-        MockitoAnnotations.initMocks(this);
-
-        mContext = RuntimeEnvironment.application;
-        mSaveButton = new Button(mContext);
-
-        mFragment = spy(new PrivateDnsModeDialogFragment());
-        doReturn(mContext).when(mFragment).getContext();
-        mFragment.onCreateDialog(null);
-        mFragment.mSaveButton = mSaveButton;
-    }
-
-    @Test
-    public void testOnCheckedChanged_dnsModeOff_disableEditText() {
-        mFragment.onCheckedChanged(null, R.id.private_dns_mode_off);
-
-        assertThat(mFragment.mMode).isEqualTo(PRIVATE_DNS_MODE_OFF);
-        assertThat(mFragment.mEditText.isEnabled()).isFalse();
-    }
-
-    @Test
-    public void testOnCheckedChanged_dnsModeOpportunistic_disableEditText() {
-        mFragment.onCheckedChanged(null, R.id.private_dns_mode_opportunistic);
-
-        assertThat(mFragment.mMode).isEqualTo(PRIVATE_DNS_MODE_OPPORTUNISTIC);
-        assertThat(mFragment.mEditText.isEnabled()).isFalse();
-    }
-
-    @Test
-    public void testOnCheckedChanged_dnsModeProvider_enableEditText() {
-        mFragment.onCheckedChanged(null, R.id.private_dns_mode_provider);
-
-        assertThat(mFragment.mMode).isEqualTo(PRIVATE_DNS_MODE_PROVIDER_HOSTNAME);
-        assertThat(mFragment.mEditText.isEnabled()).isTrue();
-    }
-
-    @Test
-    public void testOnCreateDialog_containsCorrectData() {
-        Settings.Global.putString(mContext.getContentResolver(),
-                PrivateDnsModeDialogFragment.MODE_KEY, PRIVATE_DNS_MODE_OPPORTUNISTIC);
-        Settings.Global.putString(mContext.getContentResolver(),
-                PrivateDnsModeDialogFragment.HOSTNAME_KEY, HOST_NAME);
-
-        mFragment.onCreateDialog(null);
-
-        assertThat(mFragment.mEditText.getText().toString()).isEqualTo(HOST_NAME);
-        assertThat(mFragment.mRadioGroup.getCheckedRadioButtonId()).isEqualTo(
-                R.id.private_dns_mode_opportunistic);
-    }
-
-    @Test
-    public void testOnCheckedChanged_switchMode_saveButtonHasCorrectState() {
-        // Set invalid hostname
-        mFragment.mEditText.setText(INVALID_HOST_NAME);
-
-        mFragment.onCheckedChanged(null, R.id.private_dns_mode_opportunistic);
-        assertThat(mSaveButton.isEnabled()).isTrue();
-
-        mFragment.onCheckedChanged(null, R.id.private_dns_mode_provider);
-        assertThat(mSaveButton.isEnabled()).isFalse();
-
-        mFragment.onCheckedChanged(null, R.id.private_dns_mode_off);
-        assertThat(mSaveButton.isEnabled()).isTrue();
-    }
-}
diff --git a/tests/robotests/src/com/android/settings/network/PrivateDnsModeDialogPreferenceTest.java b/tests/robotests/src/com/android/settings/network/PrivateDnsModeDialogPreferenceTest.java
new file mode 100644
index 0000000..8a60cf3
--- /dev/null
+++ b/tests/robotests/src/com/android/settings/network/PrivateDnsModeDialogPreferenceTest.java
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2017 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.network;
+
+import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_OFF;
+import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_OPPORTUNISTIC;
+import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_PROVIDER_HOSTNAME;
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Mockito.anyInt;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.app.AlertDialog;
+import android.app.Fragment;
+import android.content.Context;
+import android.provider.Settings;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.Button;
+import android.widget.LinearLayout;
+
+import com.android.settings.R;
+import com.android.settingslib.CustomDialogPreference.CustomPreferenceDialogFragment;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.util.ReflectionHelpers;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+public class PrivateDnsModeDialogPreferenceTest {
+
+    private static final String HOST_NAME = "dns.example.com";
+    private static final String INVALID_HOST_NAME = "...,";
+
+    private PrivateDnsModeDialogPreference mPreference;
+
+    private Context mContext;
+    private Button mSaveButton;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
+        mContext = RuntimeEnvironment.application;
+        mSaveButton = new Button(mContext);
+
+        final CustomPreferenceDialogFragment fragment = mock(CustomPreferenceDialogFragment.class);
+        final AlertDialog dialog = mock(AlertDialog.class);
+        when(fragment.getDialog()).thenReturn(dialog);
+        when(dialog.getButton(anyInt())).thenReturn(mSaveButton);
+
+        mPreference = new PrivateDnsModeDialogPreference(mContext);
+        ReflectionHelpers.setField(mPreference, "mFragment", fragment);
+
+        final LayoutInflater inflater = LayoutInflater.from(mContext);
+        final View view = inflater.inflate(R.layout.private_dns_mode_dialog,
+                new LinearLayout(mContext), false);
+
+        mPreference.onBindDialogView(view);
+    }
+
+    @Test
+    public void testOnCheckedChanged_dnsModeOff_disableEditText() {
+        mPreference.onCheckedChanged(null, R.id.private_dns_mode_off);
+
+        assertThat(mPreference.mMode).isEqualTo(PRIVATE_DNS_MODE_OFF);
+        assertThat(mPreference.mEditText.isEnabled()).isFalse();
+    }
+
+    @Test
+    public void testOnCheckedChanged_dnsModeOpportunistic_disableEditText() {
+        mPreference.onCheckedChanged(null, R.id.private_dns_mode_opportunistic);
+
+        assertThat(mPreference.mMode).isEqualTo(PRIVATE_DNS_MODE_OPPORTUNISTIC);
+        assertThat(mPreference.mEditText.isEnabled()).isFalse();
+    }
+
+    @Test
+    public void testOnCheckedChanged_dnsModeProvider_enableEditText() {
+        mPreference.onCheckedChanged(null, R.id.private_dns_mode_provider);
+
+        assertThat(mPreference.mMode).isEqualTo(PRIVATE_DNS_MODE_PROVIDER_HOSTNAME);
+        assertThat(mPreference.mEditText.isEnabled()).isTrue();
+    }
+
+    @Test
+    public void testOnBindDialogView_containsCorrectData() {
+        Settings.Global.putString(mContext.getContentResolver(),
+                PrivateDnsModeDialogPreference.MODE_KEY, PRIVATE_DNS_MODE_OPPORTUNISTIC);
+        Settings.Global.putString(mContext.getContentResolver(),
+                PrivateDnsModeDialogPreference.HOSTNAME_KEY, HOST_NAME);
+
+        final LayoutInflater inflater = LayoutInflater.from(mContext);
+        final View view = inflater.inflate(R.layout.private_dns_mode_dialog,
+                new LinearLayout(mContext), false);
+        mPreference.onBindDialogView(view);
+
+        assertThat(mPreference.mEditText.getText().toString()).isEqualTo(HOST_NAME);
+        assertThat(mPreference.mRadioGroup.getCheckedRadioButtonId()).isEqualTo(
+                R.id.private_dns_mode_opportunistic);
+    }
+
+    @Test
+    public void testOnCheckedChanged_switchMode_saveButtonHasCorrectState() {
+        // Set invalid hostname
+        mPreference.mEditText.setText(INVALID_HOST_NAME);
+
+        mPreference.onCheckedChanged(null, R.id.private_dns_mode_opportunistic);
+        assertThat(mSaveButton.isEnabled()).isTrue();
+
+        mPreference.onCheckedChanged(null, R.id.private_dns_mode_provider);
+        assertThat(mSaveButton.isEnabled()).isFalse();
+
+        mPreference.onCheckedChanged(null, R.id.private_dns_mode_off);
+        assertThat(mSaveButton.isEnabled()).isTrue();
+    }
+}