diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 6e82b11..3cbb427 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -844,6 +844,18 @@
         </activity>
 
         <activity
+            android:name=".applications.appinfo.AppLocalePickerActivity"
+            android:label="@string/app_locale_picker_title"
+            android:exported="true" >
+            <intent-filter>
+                <action android:name="android.settings.APP_LOCALE_SETTINGS" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+            <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
+                android:value="com.android.settings.applications.appinfo.AppLocaleDetails" />
+        </activity>
+
+        <activity
             android:name=".Settings$LanguageAndInputSettingsActivity"
             android:label="@string/language_settings"
             android:exported="true"
diff --git a/src/com/android/settings/applications/appinfo/AppLocaleDetails.java b/src/com/android/settings/applications/appinfo/AppLocaleDetails.java
index 742ce04..966f02d 100644
--- a/src/com/android/settings/applications/appinfo/AppLocaleDetails.java
+++ b/src/com/android/settings/applications/appinfo/AppLocaleDetails.java
@@ -270,9 +270,14 @@
         /** Gets per app's default locale */
         public static Locale getAppDefaultLocale(Context context, String packageName) {
             LocaleManager localeManager = context.getSystemService(LocaleManager.class);
-            LocaleList localeList = (localeManager == null)
-                    ? new LocaleList() : localeManager.getApplicationLocales(packageName);
-            return localeList.isEmpty() ? null : localeList.get(0);
+            try {
+                LocaleList localeList = (localeManager == null)
+                        ? new LocaleList() : localeManager.getApplicationLocales(packageName);
+                return localeList.isEmpty() ? null : localeList.get(0);
+            } catch (IllegalArgumentException e) {
+                Log.w(TAG, "package name : " + packageName + " is not correct. " + e);
+            }
+            return null;
         }
 
         /** Sets per app's default language to system. */
diff --git a/src/com/android/settings/applications/appinfo/AppLocalePickerActivity.java b/src/com/android/settings/applications/appinfo/AppLocalePickerActivity.java
new file mode 100644
index 0000000..ce833ed
--- /dev/null
+++ b/src/com/android/settings/applications/appinfo/AppLocalePickerActivity.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2021 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.applications.appinfo;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+
+import com.android.settings.SettingsActivity;
+import com.android.settings.applications.AppInfoBase;
+
+/** Activity for the entry of {@link #AppLocaleDetails} from outside Settings app. */
+public class AppLocalePickerActivity extends SettingsActivity {
+    private static final String TAG = "AppLocalePickerActivity";
+
+    @Override
+    protected void onCreate(Bundle savedState) {
+        Intent intent = getEntryIntent(getIntent());
+        if (intent == null) {
+            finish();
+            return;
+        }
+        setIntent(intent);
+        super.onCreate(savedState);
+    }
+
+    @VisibleForTesting
+    Intent getEntryIntent(Intent intent) {
+        String callingPackage = getCallingPackage();
+        if (callingPackage == null || callingPackage.isEmpty()) {
+            Log.d(TAG, "No calling package name is found.");
+            return null;
+        }
+        final Bundle fragmentArgs = new Bundle();
+        fragmentArgs.putString(AppInfoBase.ARG_PACKAGE_NAME, callingPackage);
+        return intent.putExtra(SettingsActivity.EXTRA_SHOW_FRAGMENT_ARGUMENTS, fragmentArgs);
+    }
+}
diff --git a/src/com/android/settings/core/gateway/SettingsGateway.java b/src/com/android/settings/core/gateway/SettingsGateway.java
index e94fafc..c88fe46 100644
--- a/src/com/android/settings/core/gateway/SettingsGateway.java
+++ b/src/com/android/settings/core/gateway/SettingsGateway.java
@@ -42,6 +42,7 @@
 import com.android.settings.applications.UsageAccessDetails;
 import com.android.settings.applications.appinfo.AlarmsAndRemindersDetails;
 import com.android.settings.applications.appinfo.AppInfoDashboardFragment;
+import com.android.settings.applications.appinfo.AppLocaleDetails;
 import com.android.settings.applications.appinfo.DrawOverlayDetails;
 import com.android.settings.applications.appinfo.ExternalSourcesDetails;
 import com.android.settings.applications.appinfo.ManageExternalStorageDetails;
@@ -331,7 +332,8 @@
             MediaManagementAppsDetails.class.getName(),
             AutoBrightnessSettings.class.getName(),
             OneHandedSettings.class.getName(),
-            MobileNetworkSettings.class.getName()
+            MobileNetworkSettings.class.getName(),
+            AppLocaleDetails.class.getName()
     };
 
     public static final String[] SETTINGS_FOR_RESTRICTED = {
diff --git a/tests/unit/src/com/android/settings/applications/appinfo/AppLocalePickerActivityTest.java b/tests/unit/src/com/android/settings/applications/appinfo/AppLocalePickerActivityTest.java
new file mode 100644
index 0000000..f6f56d9
--- /dev/null
+++ b/tests/unit/src/com/android/settings/applications/appinfo/AppLocalePickerActivityTest.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2021 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.applications.appinfo;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Looper;
+
+import androidx.test.annotation.UiThreadTest;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.settings.SettingsActivity;
+import com.android.settings.applications.AppInfoBase;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class AppLocalePickerActivityTest {
+    private TestAppLocalePickerActivity mActivity;
+
+    @Before
+    @UiThreadTest
+    public void setUp() {
+        if (Looper.myLooper() == null) {
+            Looper.prepare();
+        }
+        mActivity = new TestAppLocalePickerActivity();
+    }
+
+    @After
+    public void cleanUp() {
+        mActivity = null;
+    }
+
+    @Test
+    public void onCreate_getEntryIntent_returnNull() {
+        TestAppLocalePickerActivity.setCallingPackage(null);
+        Intent intent = new Intent();
+
+        assertThat(mActivity.getEntryIntent(intent)).isEqualTo(null);
+    }
+
+    @Test
+    public void onCreate_getEntryIntent_returnIntentWithPackageName() {
+        String callingPackageName = "com.example.android";
+        TestAppLocalePickerActivity.setCallingPackage(callingPackageName);
+        Intent intent = new Intent();
+
+        Intent entryIntent = mActivity.getEntryIntent(intent);
+
+        Bundle outputBundle =
+                entryIntent.getBundleExtra(SettingsActivity.EXTRA_SHOW_FRAGMENT_ARGUMENTS);
+        String packageName = outputBundle.getString(AppInfoBase.ARG_PACKAGE_NAME);
+        assertThat(packageName).isEqualTo(callingPackageName);
+    }
+
+    private static class TestAppLocalePickerActivity extends AppLocalePickerActivity {
+        private static String sCallingPackage;
+        @Override
+        public String getCallingPackage() {
+            return sCallingPackage;
+        }
+
+        public static void setCallingPackage(String packageName) {
+            sCallingPackage = packageName;
+        }
+    }
+}