diff --git a/src/com/android/settings/wifi/NetworkRequestDialogFragment.java b/src/com/android/settings/wifi/NetworkRequestDialogFragment.java
index c627a2e..30c2cd9 100644
--- a/src/com/android/settings/wifi/NetworkRequestDialogFragment.java
+++ b/src/com/android/settings/wifi/NetworkRequestDialogFragment.java
@@ -30,6 +30,7 @@
 import android.widget.BaseAdapter;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
 import androidx.appcompat.app.AlertDialog;
 import androidx.preference.internal.PreferenceImageView;
 
@@ -46,7 +47,10 @@
 import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
 import com.android.settings.wifi.NetworkRequestErrorDialogFragment.ERROR_DIALOG_TYPE;
 import com.android.settingslib.Utils;
+import com.android.settingslib.core.lifecycle.Lifecycle;
 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;
@@ -62,10 +66,14 @@
     /** 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. */
+    private static final int MAX_NUMBER_LIST_ITEM = 5;
+
     /** Delayed time to stop scanning wifi. */
     private static final int DELAY_TIME_STOP_SCAN_MS = 30 * 1000;
 
     private List<AccessPoint> mAccessPointList;
+    private FilterWifiTracker mFilterWifiTracker;
     private AccessPointAdapter mDialogAdapter;
     private NetworkRequestUserSelectionCallback mUserSelectionCallback;
 
@@ -159,6 +167,19 @@
         if (wifiManager != null) {
             wifiManager.unregisterNetworkRequestMatchCallback(this);
         }
+
+        if (mFilterWifiTracker != null) {
+            mFilterWifiTracker.onPause();
+        }
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        if (mFilterWifiTracker != null) {
+            mFilterWifiTracker.onDestroy();
+            mFilterWifiTracker = null;
+        }
     }
 
     @Override
@@ -172,6 +193,11 @@
         }
         // 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() {
@@ -268,17 +294,33 @@
 
     @Override
     public void onMatch(List<ScanResult> scanResults) {
-        // TODO(b/119846365): Checks if we could escalate the converting effort.
-        // Converts ScanResult to WifiConfiguration.
-        List<WifiConfiguration> wifiConfigurations = null;
-        final WifiManager wifiManager = getContext().getApplicationContext()
-                .getSystemService(WifiManager.class);
-        if (wifiManager != null) {
-            wifiConfigurations = wifiManager.getAllMatchingWifiConfigs(scanResults);
+        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;
         }
 
-        setUpAccessPointList(wifiConfigurations);
+        // 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.
+        final List<AccessPoint> list = getAccessPointList();
+        list.clear();
+        list.addAll(mFilterWifiTracker.getAccessPoints());
+    }
+
+    @VisibleForTesting
+    void notifyAdapterRefresh() {
         if (getDialogAdapter() != null) {
             getDialogAdapter().notifyDataSetChanged();
         }
@@ -286,48 +328,99 @@
 
     @Override
     public void onUserSelectionConnectSuccess(WifiConfiguration wificonfiguration) {
-        if (getDialogAdapter() != null) {
-            updateAccessPointListItem(wificonfiguration);
-            getDialogAdapter().notifyDataSetChanged();
-        }
+        // Dismisses current dialog, since connection is success.
+        dismiss();
     }
 
     @Override
     public void onUserSelectionConnectFailure(WifiConfiguration wificonfiguration) {
-        if (mDialogAdapter != null) {
-            updateAccessPointListItem(wificonfiguration);
-            getDialogAdapter().notifyDataSetChanged();
-        }
+        stopScanningAndPopErrorDialog(ERROR_DIALOG_TYPE.ABORT);
     }
 
-    private void updateAccessPointListItem(WifiConfiguration wificonfiguration) {
-        if (wificonfiguration == null) {
-            return;
+    private final class FilterWifiTracker {
+        private final List<String> mAccessPointKeys;
+        private final WifiTracker mWifiTracker;
+
+        public FilterWifiTracker(Context context, Lifecycle lifecycle) {
+            mWifiTracker = WifiTrackerFactory.create(context, mWifiListener,
+                    lifecycle, /* includeSaved */ true, /* includeScans */ true);
+            mAccessPointKeys = new ArrayList<>();
         }
 
-        final List<AccessPoint> accessPointList = getAccessPointList();
-        final int accessPointListSize = accessPointList.size();
-
-        for (int i = 0; i < accessPointListSize; i++) {
-            AccessPoint accessPoint = accessPointList.get(i);
-            // It is the same AccessPoint SSID, and should be replaced to update latest properties.
-            if (accessPoint.matches(wificonfiguration)) {
-                accessPointList.set(i, new AccessPoint(getContext(), wificonfiguration));
-                break;
+        /**
+         * 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) {
+                final String key = AccessPoint.getKey(scanResult);
+                if (!mAccessPointKeys.contains(key)) {
+                    mAccessPointKeys.add(key);
+                }
             }
         }
-    }
 
-    private void setUpAccessPointList(List<WifiConfiguration> wifiConfigurations) {
-        // Grants for zero size input, since maybe current wifi is off or somethings are wrong.
-        if (wifiConfigurations == null) {
-            return;
+        /**
+         * 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) {
+                final String key = accessPoint.getKey();
+                if (mAccessPointKeys.contains(key)) {
+                    result.add(accessPoint);
+
+                    count++;
+                    // Limits how many count of items could show.
+                    if (count >= MAX_NUMBER_LIST_ITEM) {
+                        break;
+                    }
+                }
+            }
+
+            return result;
         }
 
-        final List<AccessPoint> accessPointList = getAccessPointList();
-        accessPointList.clear();
-        for (WifiConfiguration config : wifiConfigurations) {
-            accessPointList.add(new AccessPoint(getContext(), config));
+        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/tests/robotests/src/com/android/settings/wifi/NetworkRequestDialogActivityTest.java b/tests/robotests/src/com/android/settings/wifi/NetworkRequestDialogActivityTest.java
index 48f8ec0..107da79 100644
--- a/tests/robotests/src/com/android/settings/wifi/NetworkRequestDialogActivityTest.java
+++ b/tests/robotests/src/com/android/settings/wifi/NetworkRequestDialogActivityTest.java
@@ -18,9 +18,13 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import static org.mockito.Mockito.mock;
+
 import androidx.appcompat.app.AlertDialog;
 
 import com.android.settings.testutils.shadow.ShadowAlertDialogCompat;
+import com.android.settingslib.wifi.WifiTracker;
+import com.android.settingslib.wifi.WifiTrackerFactory;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -34,6 +38,10 @@
 
     @Test
     public void LaunchActivity_shouldShowNetworkRequestDialog() {
+        // Mocks fake WifiTracker, in case of exception in NetworkRequestDialogFragment.onResume().
+        WifiTracker wifiTracker = mock(WifiTracker.class);
+        WifiTrackerFactory.setTestingWifiTracker(wifiTracker);
+
         Robolectric.setupActivity(NetworkRequestDialogActivity.class);
 
         AlertDialog alertDialog = ShadowAlertDialogCompat.getLatestAlertDialog();
diff --git a/tests/robotests/src/com/android/settings/wifi/NetworkRequestDialogFragmentTest.java b/tests/robotests/src/com/android/settings/wifi/NetworkRequestDialogFragmentTest.java
index 343d170..e64fae7 100644
--- a/tests/robotests/src/com/android/settings/wifi/NetworkRequestDialogFragmentTest.java
+++ b/tests/robotests/src/com/android/settings/wifi/NetworkRequestDialogFragmentTest.java
@@ -51,6 +51,10 @@
 import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
+
+import com.android.settingslib.wifi.WifiTracker;
+import com.android.settingslib.wifi.WifiTrackerFactory;
+
 import org.robolectric.shadows.ShadowLooper;
 
 @RunWith(RobolectricTestRunner.class)
@@ -58,16 +62,21 @@
 public class NetworkRequestDialogFragmentTest {
 
     private static final String KEY_SSID = "key_ssid";
+    private static final String KEY_SECURITY = "key_security";
 
     private FragmentActivity mActivity;
     private NetworkRequestDialogFragment networkRequestDialogFragment;
     private Context mContext;
+    private WifiTracker mWifiTracker;
 
     @Before
     public void setUp() {
         mActivity = Robolectric.setupActivity(FragmentActivity.class);
         networkRequestDialogFragment = spy(NetworkRequestDialogFragment.newInstance());
         mContext = spy(RuntimeEnvironment.application);
+
+        mWifiTracker = mock(WifiTracker.class);
+        WifiTrackerFactory.setTestingWifiTracker(mWifiTracker);
     }
 
     @Test
@@ -140,71 +149,47 @@
     }
 
     @Test
-    public void updateAccessPointList_onUserSelectionConnectSuccess_updateCorrectly() {
-        List<AccessPoint> accessPointList = spy(new ArrayList<>());
-        Bundle bundle = new Bundle();
-        bundle.putString(KEY_SSID, "Test AP 1");
-        accessPointList.add(new AccessPoint(mContext, bundle));
-        bundle.putString(KEY_SSID, "Test AP 2");
-        accessPointList.add(new AccessPoint(mContext, bundle));
-        bundle.putString(KEY_SSID, "Test AP 3");
-        accessPointList.add(new AccessPoint(mContext, bundle));
-        bundle.putString(KEY_SSID, "Test AP 4");
-        accessPointList.add(new AccessPoint(mContext, bundle));
-
+    public void updateAccessPointList_onUserSelectionConnectSuccess_shouldCloseTheDialog() {
+        List<AccessPoint> accessPointList = createAccessPointList();
         when(networkRequestDialogFragment.getAccessPointList()).thenReturn(accessPointList);
         networkRequestDialogFragment.show(mActivity.getSupportFragmentManager(), null);
+        AlertDialog alertDialog = ShadowAlertDialogCompat.getLatestAlertDialog();
+        assertThat(alertDialog.isShowing()).isTrue();
 
         // Test if config would update list.
         WifiConfiguration config = new WifiConfiguration();
         config.SSID = "Test AP 3";
         networkRequestDialogFragment.onUserSelectionConnectSuccess(config);
 
-        AccessPoint verifyAccessPoint = new AccessPoint(mContext, config);
-        verify(accessPointList, times(1)).set(2, verifyAccessPoint);
+        assertThat(alertDialog.isShowing()).isFalse();
     }
 
     @Test
-    public void updateAccessPointList_onUserSelectionConnectFailure_updateCorrectly() {
-        List<AccessPoint> accessPointList = spy(new ArrayList<>());
-        Bundle bundle = new Bundle();
-        bundle.putString(KEY_SSID, "Test AP 1");
-        accessPointList.add(new AccessPoint(mContext, bundle));
-        bundle.putString(KEY_SSID, "Test AP 2");
-        accessPointList.add(new AccessPoint(mContext, bundle));
-        bundle.putString(KEY_SSID, "Test AP 3");
-        accessPointList.add(new AccessPoint(mContext, bundle));
-        bundle.putString(KEY_SSID, "Test AP 4");
-        accessPointList.add(new AccessPoint(mContext, bundle));
+    public void updateAccessPointList_onUserSelectionConnectFailure_shouldCallTimeoutDialog() {
+        FakeNetworkRequestDialogFragment fakeFragment = new FakeNetworkRequestDialogFragment();
+        FakeNetworkRequestDialogFragment spyFakeFragment = spy(fakeFragment);
+        List<AccessPoint> accessPointList = createAccessPointList();
+        when(spyFakeFragment.getAccessPointList()).thenReturn(accessPointList);
+        spyFakeFragment.show(mActivity.getSupportFragmentManager(), null);
 
-        when(networkRequestDialogFragment.getAccessPointList()).thenReturn(accessPointList);
-        networkRequestDialogFragment.show(mActivity.getSupportFragmentManager(), null);
+        AlertDialog alertDialog = ShadowAlertDialogCompat.getLatestAlertDialog();
+        assertThat(alertDialog.isShowing()).isTrue();
 
         // Test if config would update list.
         WifiConfiguration config = new WifiConfiguration();
         config.SSID = "Test AP 3";
-        networkRequestDialogFragment.onUserSelectionConnectFailure(config);
+        fakeFragment.onUserSelectionConnectFailure(config);
 
-        AccessPoint verifyAccessPoint = new AccessPoint(mContext, config);
-        verify(accessPointList, times(1)).set(2, verifyAccessPoint);
+        assertThat(fakeFragment.bCalledStopAndPop).isTrue();
     }
 
     @Test
-    public void onUserSelectionCallbackRegistration_shouldCallSelect() {
-        List<AccessPoint> accessPointList = spy(new ArrayList<>());
-        Bundle bundle = new Bundle();
-        bundle.putString(KEY_SSID, "Test AP 1");
-        accessPointList.add(new AccessPoint(mContext, bundle));
-        bundle.putString(KEY_SSID, "Test AP 2");
-        accessPointList.add(new AccessPoint(mContext, bundle));
-
-        bundle.putString(KEY_SSID, "Test AP 3");
-        AccessPoint clickedAccessPoint = new AccessPoint(mContext, bundle);
+    public void onUserSelectionCallbackRegistration_onClick_shouldCallSelect() {
+        // Assert.
+        final int indexClickItem = 3;
+        List<AccessPoint> accessPointList = createAccessPointList();
+        AccessPoint clickedAccessPoint = accessPointList.get(indexClickItem);
         clickedAccessPoint.generateOpenNetworkConfig();
-        accessPointList.add(clickedAccessPoint);
-
-        bundle.putString(KEY_SSID, "Test AP 4");
-        accessPointList.add(new AccessPoint(mContext, bundle));
         when(networkRequestDialogFragment.getAccessPointList()).thenReturn(accessPointList);
 
         NetworkRequestUserSelectionCallback selectionCallback = mock(
@@ -212,40 +197,66 @@
         AlertDialog dialog = mock(AlertDialog.class);
         networkRequestDialogFragment.onUserSelectionCallbackRegistration(selectionCallback);
 
-        networkRequestDialogFragment.onClick(dialog, 2);
+        // Act.
+        networkRequestDialogFragment.onClick(dialog, indexClickItem);
 
+        // Check.
         verify(selectionCallback, times(1)).select(clickedAccessPoint.getConfig());
     }
 
     @Test
     public void onMatch_shouldUpdatedList() {
-        // Prepares WifiManager.
+        // Assert.
         when(networkRequestDialogFragment.getContext()).thenReturn(mContext);
         Context applicationContext = spy(RuntimeEnvironment.application.getApplicationContext());
         when(mContext.getApplicationContext()).thenReturn(applicationContext);
         WifiManager wifiManager = mock(WifiManager.class);
         when(applicationContext.getSystemService(Context.WIFI_SERVICE)).thenReturn(wifiManager);
+        networkRequestDialogFragment.onResume();
 
-        List<WifiConfiguration> wifiConfigurationList = new ArrayList<>();
-        WifiConfiguration config = new WifiConfiguration();
+        List<AccessPoint> accessPointList = createAccessPointList();
+        when(mWifiTracker.getAccessPoints()).thenReturn(accessPointList);
+
         final String SSID_AP1 = "Test AP 1";
-        config.SSID = SSID_AP1;
-        wifiConfigurationList.add(config);
-        config = new WifiConfiguration();
         final String SSID_AP2 = "Test AP 2";
-        config.SSID = SSID_AP2;
-        wifiConfigurationList.add(config);
-
-        // Prepares callback converted data.
         List<ScanResult> scanResults = new ArrayList<>();
-        when(wifiManager.getAllMatchingWifiConfigs(scanResults)).thenReturn(wifiConfigurationList);
+        ScanResult scanResult = new ScanResult();
+        scanResult.SSID = SSID_AP1;
+        scanResult.capabilities = "WEP";
+        scanResults.add(scanResult);
+        scanResult = new ScanResult();
+        scanResult.SSID = SSID_AP2;
+        scanResult.capabilities = "WEP";
+        scanResults.add(scanResult);
 
+        // Act.
         networkRequestDialogFragment.onMatch(scanResults);
 
-        List<AccessPoint> accessPointList = networkRequestDialogFragment.getAccessPointList();
-        assertThat(accessPointList).isNotEmpty();
-        assertThat(accessPointList.size()).isEqualTo(2);
-        assertThat(accessPointList.get(0).getSsid()).isEqualTo(SSID_AP1);
-        assertThat(accessPointList.get(1).getSsid()).isEqualTo(SSID_AP2);
+        // Check.
+        List<AccessPoint> returnList = networkRequestDialogFragment.getAccessPointList();
+        assertThat(returnList).isNotEmpty();
+        assertThat(returnList.size()).isEqualTo(2);
+        assertThat(returnList.get(0).getSsid()).isEqualTo(SSID_AP1);
+        assertThat(returnList.get(1).getSsid()).isEqualTo(SSID_AP2);
+    }
+
+    private List<AccessPoint> createAccessPointList() {
+        List<AccessPoint> accessPointList = spy(new ArrayList<>());
+        Bundle bundle = new Bundle();
+        bundle.putString(KEY_SSID, "Test AP 1");
+        bundle.putInt(KEY_SECURITY, 1);
+        accessPointList.add(new AccessPoint(mContext, bundle));
+        bundle.putString(KEY_SSID, "Test AP 2");
+        bundle.putInt(KEY_SECURITY, 1);
+        accessPointList.add(new AccessPoint(mContext, bundle));
+        bundle.putString(KEY_SSID, "Test AP 3");
+        bundle.putInt(KEY_SECURITY, 2);
+        AccessPoint clickedAccessPoint = new AccessPoint(mContext, bundle);
+        accessPointList.add(clickedAccessPoint);
+        bundle.putString(KEY_SSID, "Test AP 4");
+        bundle.putInt(KEY_SECURITY, 0);
+        accessPointList.add(new AccessPoint(mContext, bundle));
+
+        return accessPointList;
     }
 }