Merge "Support CTSVerifier wifi test" into rvc-qpr-dev
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index d7ad028..82c72de 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -691,6 +691,20 @@
             </intent-filter>
         </activity>
 
+        <!-- This is used internally for CTS tests and should not be used in generally. -->
+        <activity android:name=".wifi.networkrequest.NetworkRequestDialogActivity"
+                  android:excludeFromRecents="true"
+                  android:exported="true"
+                  android:launchMode="singleTop"
+                  android:permission="android.permission.NETWORK_SETTINGS"
+                  android:taskAffinity=".wifi.networkrequest.NetworkRequestDialogActivity"
+                  android:theme="@style/ActionDialogTheme">
+            <intent-filter>
+                <action android:name="com.android.settings.wifi.action.NETWORK_REQUEST"/>
+                <category android:name="android.intent.category.DEFAULT"/>
+            </intent-filter>
+        </activity>
+
         <!-- This logic is copied from phone.-->
         <!-- Ensures there's lightweight fallback activity when no other MAIN/HOME activity is present.-->
         <activity
diff --git a/res/layout/preference_access_point.xml b/res/layout/preference_access_point.xml
new file mode 100644
index 0000000..40b0841
--- /dev/null
+++ b/res/layout/preference_access_point.xml
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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.
+  -->
+
+<!-- Based off preference_material_settings.xml except that the ripple effect is active only on
+     the left side. -->
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:minHeight="?android:attr/listPreferredItemHeightSmall"
+    android:gravity="center_vertical"
+    android:background="?android:attr/selectableItemBackground"
+    android:clipToPadding="false"
+    android:paddingStart="@dimen/ap_preference_item_padding_start"
+    android:paddingEnd="@dimen/ap_preference_item_padding_end">
+
+    <LinearLayout
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:background="?android:attr/selectableItemBackground"
+        android:gravity="start|center_vertical"
+        android:clipToPadding="false">
+
+        <FrameLayout
+            android:id="@+id/icon_frame"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:layout_marginEnd="@dimen/ap_preference_item_icon_margin_end">
+            <ImageView
+                android:id="@android:id/icon"
+                android:layout_width="@dimen/icon_size"
+                android:layout_height="@dimen/icon_size"
+            />
+        </FrameLayout>
+
+        <RelativeLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:paddingTop="16dp"
+            android:paddingBottom="16dp">
+
+            <TextView
+                android:id="@android:id/title"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:singleLine="true"
+                android:textAppearance="?android:attr/textAppearanceLarge"
+                android:ellipsize="marquee" />
+
+            <TextView
+                android:id="@android:id/summary"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_below="@android:id/title"
+                android:layout_alignStart="@android:id/title"
+                android:textAppearance="?android:attr/textAppearanceMedium"
+                android:maxLines="10" />
+
+        </RelativeLayout>
+
+    </LinearLayout>
+
+    <include layout="@layout/preference_two_target_divider" />
+
+    <!-- Preference should place its actual preference widget here. -->
+    <LinearLayout
+        android:id="@android:id/widget_frame"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:minWidth="64dp"
+        android:gravity="center"
+        android:orientation="vertical" />
+
+</LinearLayout>
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 04838bb..6c3502b 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -144,4 +144,9 @@
     <dimen name="alert_dialog_password_checkbox_margin_end">@*android:dimen/car_padding_3</dimen>
     <dimen name="alert_dialog_password_checkbox_margin_start">@*android:dimen/car_padding_3</dimen>
     <dimen name="alert_dialog_password_checkbox_margin_top">@*android:dimen/car_padding_1</dimen>
+
+    <!-- Preference access point -->
+    <dimen name="ap_preference_item_padding_start">@*android:dimen/car_keyline_1</dimen>
+    <dimen name="ap_preference_item_padding_end">@*android:dimen/car_keyline_1</dimen>
+    <dimen name="ap_preference_item_icon_margin_end">@*android:dimen/car_padding_2</dimen>
 </resources>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index f514e5b..c6bfc4b 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -306,6 +306,20 @@
     <string name="wifi_ask_disable"><xliff:g id="requester" example="FancyApp">%s</xliff:g> wants to turn off Wi-Fi</string>
     <!-- Summary text when Wi-Fi has error -->
     <string name="wifi_error">Error</string>
+    <!-- Title for Network connection request Dialog [CHAR LIMIT=60] -->
+    <string name="network_connection_request_dialog_title">Device to use with <xliff:g id="appName" example="ThirdPartyAppName">%1$s</xliff:g></string>
+    <!-- Message for Network connection timeout Dialog [CHAR LIMIT=NONE] -->
+    <string name="network_connection_timeout_dialog_message">No devices found. Make sure devices are turned on and available to connect.</string>
+    <!-- OK button for Network connection timeout Dialog [CHAR LIMIT=30] -->
+    <string name="network_connection_timeout_dialog_ok">Try again</string>
+    <!-- Message for Network connection error state Dialog [CHAR LIMIT=NONE] -->
+    <string name="network_connection_errorstate_dialog_message">Something came up. The application has cancelled the request to choose a device.</string>
+    <!-- Toast message when connection is successful [CHAR LIMIT=30] -->
+    <string name="network_connection_connect_successful">Connection successful</string>
+    <!-- Neutral button for Network connection request Dialog [CHAR LIMIT=30] -->
+    <string name="network_connection_request_dialog_showall">Show all</string>
+    <!--Bluetooth settings screen, text that appears in heading bar when scanning for devices -->
+    <string name="progress_scanning">Searching</string>
 
     <!-- Bluetooth settings --><skip/>
     <!-- Title of Bluetooth settings pages. [CHAR LIMIT=30] -->
diff --git a/src/com/android/car/settings/wifi/WifiUtil.java b/src/com/android/car/settings/wifi/WifiUtil.java
index 41f64fd..5e8e40e 100644
--- a/src/com/android/car/settings/wifi/WifiUtil.java
+++ b/src/com/android/car/settings/wifi/WifiUtil.java
@@ -32,6 +32,7 @@
 import android.text.TextUtils;
 import android.widget.Toast;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.StringRes;
 
 import com.android.car.settings.R;
@@ -180,6 +181,31 @@
         WifiConfiguration wifiConfig = new WifiConfiguration();
         wifiConfig.SSID = String.format("\"%s\"", ssid);
         wifiConfig.hiddenSSID = hidden;
+
+        return finishWifiConfig(wifiConfig, security, password);
+    }
+
+    /** Similar to above, but uses AccessPoint to get additional relevant information. */
+    public static WifiConfiguration getWifiConfig(@NonNull AccessPoint accessPoint,
+            String password) {
+        if (accessPoint == null) {
+            throw new IllegalArgumentException("AccessPoint input is required.");
+        }
+
+        WifiConfiguration wifiConfig = new WifiConfiguration();
+        if (!accessPoint.isSaved()) {
+            wifiConfig.SSID = AccessPoint.convertToQuotedString(
+                    accessPoint.getSsidStr());
+        } else {
+            wifiConfig.networkId = accessPoint.getConfig().networkId;
+            wifiConfig.hiddenSSID = accessPoint.getConfig().hiddenSSID;
+        }
+
+        return finishWifiConfig(wifiConfig, accessPoint.getSecurity(), password);
+    }
+
+    private static WifiConfiguration finishWifiConfig(WifiConfiguration wifiConfig, int security,
+            String password) {
         switch (security) {
             case AccessPoint.SECURITY_NONE:
                 wifiConfig.setSecurityParams(WifiConfiguration.SECURITY_TYPE_OPEN);
@@ -234,7 +260,6 @@
         return wifiConfig;
     }
 
-
     /** Forget the network specified by {@code accessPoint}. */
     public static void forget(Context context, AccessPoint accessPoint) {
         WifiManager wifiManager = context.getSystemService(WifiManager.class);
diff --git a/src/com/android/car/settings/wifi/networkrequest/NetworkRequestDialogActivity.java b/src/com/android/car/settings/wifi/networkrequest/NetworkRequestDialogActivity.java
new file mode 100644
index 0000000..4044d5d
--- /dev/null
+++ b/src/com/android/car/settings/wifi/networkrequest/NetworkRequestDialogActivity.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2020 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.car.settings.wifi.networkrequest;
+
+import android.os.Bundle;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.FragmentActivity;
+
+/**
+ * When other applications request to have a wifi connection, framework will bring up this activity
+ * to let user select which wifi ap wanna to connect. This activity is just a door for framework
+ * call, and main functional process is at {@code NetworkRequestDialogFragment}.
+ */
+public class NetworkRequestDialogActivity extends FragmentActivity {
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        NetworkRequestDialogFragment fragment = NetworkRequestDialogFragment.newInstance();
+        fragment.show(getSupportFragmentManager(),
+                NetworkRequestDialogFragment.class.getSimpleName());
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        finish();
+    }
+}
+
diff --git a/src/com/android/car/settings/wifi/networkrequest/NetworkRequestDialogFragment.java b/src/com/android/car/settings/wifi/networkrequest/NetworkRequestDialogFragment.java
new file mode 100644
index 0000000..2bf595e
--- /dev/null
+++ b/src/com/android/car/settings/wifi/networkrequest/NetworkRequestDialogFragment.java
@@ -0,0 +1,546 @@
+/*
+ * Copyright (C) 2020 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.car.settings.wifi.networkrequest;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.graphics.drawable.Drawable;
+import android.net.wifi.ScanResult;
+import android.net.wifi.WifiConfiguration;
+import android.net.wifi.WifiManager;
+import android.net.wifi.WifiManager.NetworkRequestMatchCallback;
+import android.net.wifi.WifiManager.NetworkRequestUserSelectionCallback;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.HandlerExecutor;
+import android.os.Message;
+import android.text.TextUtils;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.BaseAdapter;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
+
+import com.android.car.settings.R;
+import com.android.car.settings.wifi.WifiUtil;
+import com.android.car.ui.AlertDialogBuilder;
+import com.android.settingslib.Utils;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+import com.android.settingslib.core.lifecycle.ObservableDialogFragment;
+import com.android.settingslib.wifi.AccessPoint;
+import com.android.settingslib.wifi.WifiTracker;
+import com.android.settingslib.wifi.WifiTrackerFactory;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The Fragment sets up callback {@link NetworkRequestMatchCallback} with framework. To handle most
+ * behaviors of the callback when requesting wifi network, except for error message. When error
+ * happens, {@link NetworkRequestErrorDialogFragment} will be called to display error message.
+ */
+public class NetworkRequestDialogFragment extends ObservableDialogFragment implements
+        DialogInterface.OnClickListener, NetworkRequestMatchCallback {
+
+    /** Message sent to us to stop scanning wifi and pop up timeout dialog. */
+    private static final int MESSAGE_STOP_SCAN_WIFI_LIST = 0;
+
+    /**
+     * Spec defines there should be 5 wifi ap on the list at most or just show all if {@code
+     * mShowLimitedItem} is false.
+     */
+    private static final int MAX_NUMBER_LIST_ITEM = 5;
+    private boolean mShowLimitedItem = true;
+
+    /** Delayed time to stop scanning wifi. */
+    private static final int DELAY_TIME_STOP_SCAN_MS = 30 * 1000;
+
+    static final String EXTRA_APP_NAME = "com.android.settings.wifi.extra.APP_NAME";
+    static final String EXTRA_IS_SPECIFIED_SSID =
+            "com.android.settings.wifi.extra.REQUEST_IS_FOR_SINGLE_NETWORK";
+
+    private List<AccessPoint> mAccessPointList;
+    private FilterWifiTracker mFilterWifiTracker;
+    private AccessPointAdapter mDialogAdapter;
+    private NetworkRequestUserSelectionCallback mUserSelectionCallback;
+    private boolean mIsSpecifiedSsid;
+    private boolean mWaitingConnectCallback;
+
+    /** Creates Network Request dialog. */
+    public static NetworkRequestDialogFragment newInstance() {
+        NetworkRequestDialogFragment dialogFragment = new NetworkRequestDialogFragment();
+        return dialogFragment;
+    }
+
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        Context context = getContext();
+
+        Intent intent = getActivity().getIntent();
+        if (intent != null) {
+            mIsSpecifiedSsid = intent.getBooleanExtra(EXTRA_IS_SPECIFIED_SSID, false);
+        }
+
+        // Prepares adapter.
+        mDialogAdapter = new AccessPointAdapter(context,
+                R.layout.preference_access_point, getAccessPointList());
+
+        AlertDialogBuilder builder = new AlertDialogBuilder(context)
+                .setTitle(getTitle())
+                .setAdapter(mDialogAdapter, /* listener= */ this)
+                .setNegativeButton(R.string.cancel, (dialog, which) -> onCancel(dialog))
+                // Do nothings, will replace the onClickListener to avoid auto closing dialog.
+                .setNeutralButton(R.string.network_connection_request_dialog_showall,
+                        /* listener= */ null);
+        if (mIsSpecifiedSsid) {
+            builder.setPositiveButton(R.string.wifi_setup_connect, /* listener= */ null);
+        }
+
+        // Clicking list item is to connect wifi ap.
+        AlertDialog dialog = builder.create();
+        dialog.getListView().setOnItemClickListener(
+                (parent, view, position, id) -> this.onClick(dialog, position));
+
+        // Don't dismiss dialog when touching outside. User reports it is easy to touch outside.
+        // This causes dialog to close.
+        setCancelable(false);
+
+        dialog.setOnShowListener((dialogInterface) -> {
+            // Replace NeutralButton onClickListener to avoid closing dialog
+            Button neutralBtn = dialog.getButton(AlertDialog.BUTTON_NEUTRAL);
+            neutralBtn.setVisibility(View.GONE);
+            neutralBtn.setOnClickListener(v -> {
+                mShowLimitedItem = false;
+                renewAccessPointList(/* scanResults= */ null);
+                notifyAdapterRefresh();
+                neutralBtn.setVisibility(View.GONE);
+            });
+
+            // Replace Positive onClickListener to avoid closing dialog
+            if (mIsSpecifiedSsid) {
+                Button positiveBtn = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
+                positiveBtn.setOnClickListener(v -> {
+                    // When clicking connect button, should connect to the first and the only one
+                    // list item.
+                    this.onClick(dialog, /* position= */ 0);
+                });
+                // Disable button in first, and enable it after there are some accesspoints in list.
+                positiveBtn.setEnabled(false);
+            }
+        });
+        return dialog;
+    }
+
+    private String getTitle() {
+        Intent intent = getActivity().getIntent();
+        String appName = "";
+        if (intent != null) {
+            appName = intent.getStringExtra(EXTRA_APP_NAME);
+        }
+
+        return getString(R.string.network_connection_request_dialog_title, appName);
+    }
+
+    @NonNull
+    List<AccessPoint> getAccessPointList() {
+        // Initials list for adapter, in case of display crashing.
+        if (mAccessPointList == null) {
+            mAccessPointList = new ArrayList<>();
+        }
+        return mAccessPointList;
+    }
+
+    private BaseAdapter getDialogAdapter() {
+        return mDialogAdapter;
+    }
+
+    @Override
+    public void onClick(DialogInterface dialog, int which) {
+        List<AccessPoint> accessPointList = getAccessPointList();
+        if (accessPointList.size() == 0) {
+            return;  // Invalid values.
+        }
+        if (mUserSelectionCallback == null) {
+            return; // Callback is missing or not ready.
+        }
+
+        if (which < accessPointList.size()) {
+            AccessPoint selectedAccessPoint = accessPointList.get(which);
+            WifiConfiguration wifiConfig = selectedAccessPoint.getConfig();
+            if (wifiConfig == null) {
+                if (selectedAccessPoint != null) {
+                    wifiConfig = WifiUtil.getWifiConfig(selectedAccessPoint, /* password= */ null);
+                }
+            }
+
+            if (wifiConfig != null) {
+                mUserSelectionCallback.select(wifiConfig);
+
+                mWaitingConnectCallback = true;
+                updateConnectButton(false);
+            }
+        }
+    }
+
+    @Override
+    public void onCancel(@NonNull DialogInterface dialog) {
+        super.onCancel(dialog);
+        // Finishes the activity when user clicks back key or outside of the dialog.
+        if (getActivity() != null) {
+            getActivity().finish();
+        }
+        if (mUserSelectionCallback != null) {
+            mUserSelectionCallback.reject();
+        }
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+
+        mHandler.removeMessages(MESSAGE_STOP_SCAN_WIFI_LIST);
+        WifiManager wifiManager = getContext().getApplicationContext()
+                .getSystemService(WifiManager.class);
+        if (wifiManager != null) {
+            wifiManager.unregisterNetworkRequestMatchCallback(this);
+        }
+
+        if (mFilterWifiTracker != null) {
+            mFilterWifiTracker.onPause();
+        }
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+
+        if (mFilterWifiTracker != null) {
+            mFilterWifiTracker.onDestroy();
+            mFilterWifiTracker = null;
+        }
+    }
+
+    private void showAllButton() {
+        AlertDialog alertDialog = (AlertDialog) getDialog();
+        if (alertDialog == null) {
+            return;
+        }
+
+        Button neutralBtn = alertDialog.getButton(AlertDialog.BUTTON_NEUTRAL);
+        if (neutralBtn != null) {
+            neutralBtn.setVisibility(View.VISIBLE);
+        }
+    }
+
+    private void updateConnectButton(boolean enabled) {
+        // The button is only showed in single SSID mode.
+        if (!mIsSpecifiedSsid) {
+            return;
+        }
+
+        AlertDialog alertDialog = (AlertDialog) getDialog();
+        if (alertDialog == null) {
+            return;
+        }
+
+        Button positiveBtn = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
+        if (positiveBtn != null) {
+            positiveBtn.setEnabled(enabled);
+        }
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+
+        WifiManager wifiManager = getContext().getApplicationContext()
+                .getSystemService(WifiManager.class);
+        if (wifiManager != null) {
+            wifiManager.registerNetworkRequestMatchCallback(new HandlerExecutor(mHandler), this);
+        }
+        // Sets time-out to stop scanning.
+        mHandler.sendEmptyMessageDelayed(MESSAGE_STOP_SCAN_WIFI_LIST, DELAY_TIME_STOP_SCAN_MS);
+
+        if (mFilterWifiTracker == null) {
+            mFilterWifiTracker = new FilterWifiTracker(getActivity(), getSettingsLifecycle());
+        }
+        mFilterWifiTracker.onResume();
+    }
+
+    private final Handler mHandler = new Handler() {
+        @Override
+        public void handleMessage(Message msg) {
+            switch (msg.what) {
+                case MESSAGE_STOP_SCAN_WIFI_LIST:
+                    removeMessages(MESSAGE_STOP_SCAN_WIFI_LIST);
+                    stopScanningAndPopErrorDialog(
+                            NetworkRequestErrorDialogFragment.ERROR_DIALOG_TYPE.TIME_OUT);
+                    break;
+                default:
+                    // Do nothing.
+                    break;
+            }
+        }
+    };
+
+    protected void stopScanningAndPopErrorDialog(
+            NetworkRequestErrorDialogFragment.ERROR_DIALOG_TYPE type) {
+        // Dismisses current dialog.
+        Dialog dialog =  getDialog();
+        if (dialog != null && dialog.isShowing()) {
+            dismiss();
+        }
+
+        // Throws error dialog.
+        NetworkRequestErrorDialogFragment fragment = NetworkRequestErrorDialogFragment
+                .newInstance();
+        Bundle bundle = new Bundle();
+        bundle.putSerializable(NetworkRequestErrorDialogFragment.DIALOG_TYPE, type);
+        fragment.setArguments(bundle);
+        fragment.show(getActivity().getSupportFragmentManager(),
+                NetworkRequestErrorDialogFragment.class.getSimpleName());
+    }
+
+    private class AccessPointAdapter extends ArrayAdapter<AccessPoint> {
+
+        private final int mResourceId;
+        private final LayoutInflater mInflater;
+
+        AccessPointAdapter(Context context, int resourceId, List<AccessPoint> objects) {
+            super(context, resourceId, objects);
+            mResourceId = resourceId;
+            mInflater = LayoutInflater.from(context);
+        }
+
+        @Override
+        public View getView(int position, View view, ViewGroup parent) {
+            if (view == null) {
+                view = mInflater.inflate(mResourceId, parent, false);
+
+                View divider = view.findViewById(
+                        com.android.settingslib.R.id.two_target_divider);
+                divider.setVisibility(View.GONE);
+            }
+
+            AccessPoint accessPoint = getItem(position);
+
+            TextView titleView = view.findViewById(android.R.id.title);
+            if (titleView != null) {
+                // Shows whole SSID for better UX.
+                titleView.setSingleLine(false);
+                titleView.setText(accessPoint.getTitle());
+            }
+
+            TextView summary = view.findViewById(android.R.id.summary);
+            if (summary != null) {
+                String summaryString = accessPoint.getSettingsSummary();
+                if (TextUtils.isEmpty(summaryString)) {
+                    summary.setVisibility(View.GONE);
+                } else {
+                    summary.setVisibility(View.VISIBLE);
+                    summary.setText(summaryString);
+                }
+            }
+
+            ImageView imageView = view.findViewById(android.R.id.icon);
+            int level = accessPoint.getLevel();
+            if (imageView != null) {
+                Drawable drawable = getContext().getDrawable(
+                        Utils.getWifiIconResource(level));
+                drawable.setTintList(
+                        Utils.getColorAttr(getContext(), android.R.attr.colorControlNormal));
+                imageView.setImageDrawable(drawable);
+            }
+
+            return view;
+        }
+    }
+
+    @Override
+    public void onAbort() {
+        stopScanningAndPopErrorDialog(NetworkRequestErrorDialogFragment.ERROR_DIALOG_TYPE.ABORT);
+    }
+
+    @Override
+    public void onUserSelectionCallbackRegistration(
+            NetworkRequestUserSelectionCallback userSelectionCallback) {
+        mUserSelectionCallback = userSelectionCallback;
+    }
+
+    @Override
+    public void onMatch(List<ScanResult> scanResults) {
+        // Shouldn't need to renew cached list, since input result is empty.
+        if (scanResults != null && scanResults.size() > 0) {
+            mHandler.removeMessages(MESSAGE_STOP_SCAN_WIFI_LIST);
+            renewAccessPointList(scanResults);
+
+            notifyAdapterRefresh();
+        }
+    }
+
+    // Updates internal AccessPoint list from WifiTracker. scanResults are used to update key list
+    // of AccessPoint, and could be null if there is no necessary to update key list.
+    private void renewAccessPointList(List<ScanResult> scanResults) {
+        if (mFilterWifiTracker == null) {
+            return;
+        }
+
+        // TODO(b/119846365): Checks if we could escalate the converting effort.
+        // Updates keys of scanResults into FilterWifiTracker for updating matched AccessPoints.
+        if (scanResults != null) {
+            mFilterWifiTracker.updateKeys(scanResults);
+        }
+
+        // Re-gets matched AccessPoints from WifiTracker.
+        List<AccessPoint> list = getAccessPointList();
+        list.clear();
+        list.addAll(mFilterWifiTracker.getAccessPoints());
+    }
+
+    @VisibleForTesting
+    void notifyAdapterRefresh() {
+        if (getDialogAdapter() != null) {
+            getDialogAdapter().notifyDataSetChanged();
+        }
+    }
+
+    @Override
+    public void onUserSelectionConnectSuccess(WifiConfiguration wificonfiguration) {
+        Activity activity = getActivity();
+        if (activity != null) {
+            Toast.makeText(activity, R.string.network_connection_connect_successful,
+                    Toast.LENGTH_SHORT).show();
+            activity.finish();
+        }
+    }
+
+    @Override
+    public void onUserSelectionConnectFailure(WifiConfiguration wificonfiguration) {
+        // Do nothing when selection is failed, let user could try again easily.
+        mWaitingConnectCallback = false;
+        updateConnectButton(true);
+    }
+
+    private final class FilterWifiTracker {
+        private final List<String> mAccessPointKeys;
+        private final WifiTracker mWifiTracker;
+        private final Context mContext;
+
+        FilterWifiTracker(Context context, Lifecycle lifecycle) {
+            mWifiTracker = WifiTrackerFactory.create(context, mWifiListener,
+                    lifecycle, /* includeSaved= */ true, /* includeScans= */ true);
+            mAccessPointKeys = new ArrayList<>();
+            mContext = context;
+        }
+
+        /**
+         * Updates key list from input. {@code onMatch()} may be called in multi-times according
+         * wifi scanning result, so needs patchwork here.
+         */
+        public void updateKeys(List<ScanResult> scanResults) {
+            for (ScanResult scanResult : scanResults) {
+                String key = AccessPoint.getKey(mContext, scanResult);
+                if (!mAccessPointKeys.contains(key)) {
+                    mAccessPointKeys.add(key);
+                }
+            }
+        }
+
+        /**
+         * Returns only AccessPoints whose key is in {@code mAccessPointKeys}.
+         *
+         * @return List of matched AccessPoints.
+         */
+        public List<AccessPoint> getAccessPoints() {
+            final List<AccessPoint> allAccessPoints = mWifiTracker.getAccessPoints();
+            final List<AccessPoint> result = new ArrayList<>();
+
+            // The order should be kept, because order means wifi score (sorting in WifiTracker).
+            int count = 0;
+            for (AccessPoint accessPoint : allAccessPoints) {
+                String key = accessPoint.getKey();
+                if (mAccessPointKeys.contains(key)) {
+                    result.add(accessPoint);
+
+                    count++;
+                    // Limits how many count of items could show.
+                    if (mShowLimitedItem && count >= MAX_NUMBER_LIST_ITEM) {
+                        break;
+                    }
+                }
+            }
+
+            // Update related UI buttons
+            if (mShowLimitedItem && (count >= MAX_NUMBER_LIST_ITEM)) {
+                showAllButton();
+            }
+            // Enable connect button if there is no pending callback.
+            if (!mWaitingConnectCallback) {
+                updateConnectButton(true);
+            }
+
+            return result;
+        }
+
+        private WifiTracker.WifiListener mWifiListener = new WifiTracker.WifiListener() {
+
+            @Override
+            public void onWifiStateChanged(int state) {
+                notifyAdapterRefresh();
+            }
+
+            @Override
+            public void onConnectedChanged() {
+                notifyAdapterRefresh();
+            }
+
+            @Override
+            public void onAccessPointsChanged() {
+                notifyAdapterRefresh();
+            }
+        };
+
+        public void onDestroy() {
+            if (mWifiTracker != null) {
+                mWifiTracker.onDestroy();
+            }
+        }
+
+        public void onResume() {
+            if (mWifiTracker != null) {
+                mWifiTracker.onStart();
+            }
+        }
+
+        public void onPause() {
+            if (mWifiTracker != null) {
+                mWifiTracker.onStop();
+            }
+        }
+    }
+}
diff --git a/src/com/android/car/settings/wifi/networkrequest/NetworkRequestErrorDialogFragment.java b/src/com/android/car/settings/wifi/networkrequest/NetworkRequestErrorDialogFragment.java
new file mode 100644
index 0000000..7aa1056
--- /dev/null
+++ b/src/com/android/car/settings/wifi/networkrequest/NetworkRequestErrorDialogFragment.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2020 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.car.settings.wifi.networkrequest;
+
+import android.app.Dialog;
+import android.content.DialogInterface;
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.DialogFragment;
+
+import com.android.car.settings.R;
+import com.android.car.ui.AlertDialogBuilder;
+
+/**
+ * The dialog shows an error message when requesting network {@link NetworkRequestDialogFragment}.
+ * Contains multi-error types in {@code ERROR_DIALOG_TYPE}.
+ */
+public class NetworkRequestErrorDialogFragment extends DialogFragment {
+
+    public static final String DIALOG_TYPE = "DIALOG_ERROR_TYPE";
+
+    public enum ERROR_DIALOG_TYPE {TIME_OUT, ABORT}
+
+    /** Creates Network Error dialog. */
+    public static NetworkRequestErrorDialogFragment newInstance() {
+        return new NetworkRequestErrorDialogFragment();
+    }
+
+    @Override
+    public void onCancel(@NonNull DialogInterface dialog) {
+        super.onCancel(dialog);
+        // Wants to finish the activity when user clicks back key or outside of the dialog.
+        getActivity().finish();
+    }
+
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        // Gets error type to construct dialog. Default is TIME_OUT dialog.
+        ERROR_DIALOG_TYPE msgType = ERROR_DIALOG_TYPE.TIME_OUT;
+        if (getArguments() != null) {
+            msgType = (ERROR_DIALOG_TYPE) getArguments().getSerializable(DIALOG_TYPE);
+        }
+
+        AlertDialogBuilder builder = new AlertDialogBuilder(getContext());
+        if (msgType == ERROR_DIALOG_TYPE.TIME_OUT) {
+            builder.setMessage(R.string.network_connection_timeout_dialog_message)
+                    .setPositiveButton(R.string.network_connection_timeout_dialog_ok,
+                            (dialog, which) -> startScanningDialog())
+                    .setNegativeButton(R.string.cancel, (dialog, which) -> getActivity().finish());
+        } else {
+            builder.setMessage(R.string.network_connection_errorstate_dialog_message)
+                    .setPositiveButton(R.string.okay, (dialog, which) -> getActivity().finish());
+        }
+        return builder.create();
+    }
+
+    protected void startScanningDialog() {
+        NetworkRequestDialogFragment fragment = NetworkRequestDialogFragment.newInstance();
+        fragment.show(getActivity().getSupportFragmentManager(),
+                NetworkRequestDialogFragment.class.getSimpleName());
+    }
+}