diff --git a/java/AndroidManifest.xml b/java/AndroidManifest.xml
index a7e64bf..6f4e602 100644
--- a/java/AndroidManifest.xml
+++ b/java/AndroidManifest.xml
@@ -57,6 +57,7 @@
         </service>
 
         <activity android:name=".setup.SetupActivity"
+                android:theme="@style/platformActivityTheme"
                 android:label="@string/english_ime_name"
                 android:icon="@drawable/ic_launcher_keyboard"
                 android:launchMode="singleTask"
@@ -68,6 +69,7 @@
         </activity>
 
         <activity android:name=".setup.SetupWizardActivity"
+                android:theme="@style/platformActivityTheme"
                 android:label="@string/english_ime_name"
                 android:clearTaskOnLaunch="true">
             <intent-filter>
@@ -84,6 +86,7 @@
         </receiver>
 
         <activity android:name=".settings.SettingsActivity"
+                android:theme="@style/platformActivityTheme"
                 android:label="@string/english_ime_settings"
                 android:uiOptions="splitActionBarWhenNarrow">
             <intent-filter>
@@ -92,6 +95,7 @@
         </activity>
 
         <activity android:name=".spellcheck.SpellCheckerSettingsActivity"
+                  android:theme="@style/platformActivityTheme"
                   android:label="@string/android_spell_checker_settings">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -99,6 +103,7 @@
         </activity>
 
         <activity android:name=".settings.DebugSettingsActivity"
+                android:theme="@style/platformActivityTheme"
                 android:label="@string/english_ime_debug_settings">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -145,8 +150,8 @@
         </receiver>
 
         <activity android:name="com.android.inputmethod.dictionarypack.DictionarySettingsActivity"
+                android:theme="@style/platformActivityTheme"
                 android:label="@string/dictionary_settings_title"
-                android:theme="@android:style/Theme.Holo"
                 android:uiOptions="splitActionBarWhenNarrow">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
@@ -154,8 +159,8 @@
         </activity>
 
         <activity android:name="com.android.inputmethod.dictionarypack.DownloadOverMeteredDialog"
-                android:label="@string/dictionary_install_over_metered_network_prompt"
-                android:theme="@android:style/Theme.Holo">
+                android:theme="@style/platformActivityTheme"
+                android:label="@string/dictionary_install_over_metered_network_prompt">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
             </intent-filter>
diff --git a/java/res/values-v20/platform-theme.xml b/java/res/values-v20/platform-theme.xml
new file mode 100644
index 0000000..b8c1d96
--- /dev/null
+++ b/java/res/values-v20/platform-theme.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2014, 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.
+*/
+-->
+
+<!-- TODO: This file is temporarily placed under values-v20. -->
+<!-- TODO: It might be moved under values-v21. -->
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- TODO: Use Theme.Quantum.Light once it is fixed.
+    <style name="platformActivityTheme" parent="@android:style/Theme.Quantum.Light" />
+    -->
+    <style name="platformActivityTheme" parent="@android:style/Theme.Quantum.Light.NoActionBar.Fullscreen" />
+    <style name="platformDialogTheme" parent="@android:style/Theme.Quantum.Light.Dialog" />
+</resources>
diff --git a/java/res/values/platform-theme.xml b/java/res/values/platform-theme.xml
new file mode 100644
index 0000000..8e131a2
--- /dev/null
+++ b/java/res/values/platform-theme.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2014, 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.
+*/
+-->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+    <style name="platformActivityTheme" parent="@android:style/Theme.Holo" />
+    <style name="platformDialogTheme" parent="@android:style/Theme.Holo.Dialog" />
+</resources>
diff --git a/java/src/com/android/inputmethod/latin/ImportantNoticeDialog.java b/java/src/com/android/inputmethod/latin/ImportantNoticeDialog.java
index 9870faa..be54b66 100644
--- a/java/src/com/android/inputmethod/latin/ImportantNoticeDialog.java
+++ b/java/src/com/android/inputmethod/latin/ImportantNoticeDialog.java
@@ -23,6 +23,7 @@
 import android.content.DialogInterface.OnDismissListener;
 import android.content.DialogInterface.OnShowListener;
 
+import com.android.inputmethod.latin.utils.DialogUtils;
 import com.android.inputmethod.latin.utils.ImportantNoticeUtils;
 
 /**
@@ -40,7 +41,7 @@
 
     public ImportantNoticeDialog(
             final Context context, final ImportantNoticeDialogListener listener) {
-        super(context, THEME_HOLO_DARK);
+        super(DialogUtils.getPlatformDialogThemeContext(context));
         mListener = listener;
         mNextImportantNoticeVersion = ImportantNoticeUtils.getNextImportantNoticeVersion(context);
         setMessage(ImportantNoticeUtils.getNextImportantNoticeContents(context));
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index b4807b0..d08f920 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -83,6 +83,7 @@
 import com.android.inputmethod.latin.utils.ApplicationUtils;
 import com.android.inputmethod.latin.utils.CapsModeUtils;
 import com.android.inputmethod.latin.utils.CoordinateUtils;
+import com.android.inputmethod.latin.utils.DialogUtils;
 import com.android.inputmethod.latin.utils.ImportantNoticeUtils;
 import com.android.inputmethod.latin.utils.IntentUtils;
 import com.android.inputmethod.latin.utils.JniUtils;
@@ -1662,8 +1663,9 @@
                 }
             }
         };
-        final AlertDialog.Builder builder =
-                new AlertDialog.Builder(this).setItems(items, listener).setTitle(title);
+        final AlertDialog.Builder builder = new AlertDialog.Builder(
+                DialogUtils.getPlatformDialogThemeContext(this));
+        builder.setItems(items, listener).setTitle(title);
         showOptionDialog(builder.create());
     }
 
diff --git a/java/src/com/android/inputmethod/latin/debug/ExternalDictionaryGetterForDebug.java b/java/src/com/android/inputmethod/latin/debug/ExternalDictionaryGetterForDebug.java
index 800f565..139e73a 100644
--- a/java/src/com/android/inputmethod/latin/debug/ExternalDictionaryGetterForDebug.java
+++ b/java/src/com/android/inputmethod/latin/debug/ExternalDictionaryGetterForDebug.java
@@ -28,6 +28,7 @@
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.makedict.DictionaryHeader;
 import com.android.inputmethod.latin.utils.CollectionUtils;
+import com.android.inputmethod.latin.utils.DialogUtils;
 import com.android.inputmethod.latin.utils.DictionaryInfoUtils;
 import com.android.inputmethod.latin.utils.LocaleUtils;
 
@@ -70,7 +71,7 @@
     }
 
     private static void showNoFileDialog(final Context context) {
-        new AlertDialog.Builder(context)
+        new AlertDialog.Builder(DialogUtils.getPlatformDialogThemeContext(context))
                 .setMessage(R.string.read_external_dictionary_no_files_message)
                 .setPositiveButton(android.R.string.ok, new OnClickListener() {
                     @Override
@@ -81,8 +82,8 @@
     }
 
     private static void showChooseFileDialog(final Context context, final String[] fileNames) {
-        final AlertDialog.Builder builder = new AlertDialog.Builder(context);
-        builder.setTitle(R.string.read_external_dictionary_multiple_files_title)
+        new AlertDialog.Builder(DialogUtils.getPlatformDialogThemeContext(context))
+                .setTitle(R.string.read_external_dictionary_multiple_files_title)
                 .setItems(fileNames, new OnClickListener() {
                     @Override
                     public void onClick(final DialogInterface dialog, final int which) {
@@ -111,7 +112,7 @@
         final String title = String.format(
                 context.getString(R.string.read_external_dictionary_confirm_install_message),
                 languageName);
-        new AlertDialog.Builder(context)
+        new AlertDialog.Builder(DialogUtils.getPlatformDialogThemeContext(context))
                 .setTitle(title)
                 .setMessage(message)
                 .setNegativeButton(android.R.string.cancel, new OnClickListener() {
@@ -167,7 +168,7 @@
             }
         } catch (IOException e) {
             // There was an error: show a dialog
-            new AlertDialog.Builder(context)
+            new AlertDialog.Builder(DialogUtils.getPlatformDialogThemeContext(context))
                     .setTitle(R.string.error)
                     .setMessage(e.toString())
                     .setPositiveButton(android.R.string.ok, new OnClickListener() {
diff --git a/java/src/com/android/inputmethod/latin/settings/AdditionalSubtypeSettings.java b/java/src/com/android/inputmethod/latin/settings/AdditionalSubtypeSettings.java
index 6dae620..39977e7 100644
--- a/java/src/com/android/inputmethod/latin/settings/AdditionalSubtypeSettings.java
+++ b/java/src/com/android/inputmethod/latin/settings/AdditionalSubtypeSettings.java
@@ -48,6 +48,7 @@
 import com.android.inputmethod.latin.RichInputMethodManager;
 import com.android.inputmethod.latin.utils.AdditionalSubtypeUtils;
 import com.android.inputmethod.latin.utils.CollectionUtils;
+import com.android.inputmethod.latin.utils.DialogUtils;
 import com.android.inputmethod.latin.utils.IntentUtils;
 import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
 
@@ -517,7 +518,8 @@
 
     private AlertDialog createDialog(
             @SuppressWarnings("unused") final SubtypePreference subtypePref) {
-        final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+        final AlertDialog.Builder builder = new AlertDialog.Builder(
+                DialogUtils.getPlatformDialogThemeContext(getActivity()));
         builder.setTitle(R.string.custom_input_styles_title)
                 .setMessage(R.string.custom_input_style_note_message)
                 .setNegativeButton(R.string.not_now, null)
diff --git a/java/src/com/android/inputmethod/latin/utils/DialogUtils.java b/java/src/com/android/inputmethod/latin/utils/DialogUtils.java
new file mode 100644
index 0000000..a05c932
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/utils/DialogUtils.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2014 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.inputmethod.latin.utils;
+
+import android.content.Context;
+import android.view.ContextThemeWrapper;
+
+import com.android.inputmethod.latin.R;
+
+public final class DialogUtils {
+    private DialogUtils() {
+        // This utility class is not publicly instantiable.
+    }
+
+    public static Context getPlatformDialogThemeContext(final Context context) {
+        // Because {@link AlertDialog.Builder.create()} doesn't honor the specified theme with
+        // createThemeContextWrapper=false, the result dialog box has unneeded paddings around it.
+        return new ContextThemeWrapper(context, R.style.platformDialogTheme);
+    }
+}