LatinIME/java/res/layout/input_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
**
** Copyright 2011, 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.
*/
-->

<com.android.inputmethod.latin.InputView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
>
    <!-- The height of key_preview_backing view will automatically be determined by code. -->
    <View
        android:id="@+id/key_preview_backing"
        android:layout_width="match_parent"
        android:layout_height="0dp" />

    <!-- On tablets, the suggestions strip is centered with horizontal paddings on both sides
         because width of the landscape mode is too long for the suggestions strip. This
         LinearLayout is required to hold the paddings. -->
    <LinearLayout
        android:id="@+id/suggestions_container"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
    >
        <View
            android:layout_width="@dimen/suggestions_strip_padding"
            android:layout_height="@dimen/suggestions_strip_height"
            style="?attr/suggestionsStripBackgroundStyle" />
        <!-- To ensure that key preview popup is correctly placed when the current system locale is
             one of RTL locales, layoutDirection="ltr" is needed in the SDK version 17+. -->
        <com.android.inputmethod.latin.suggestions.SuggestionStripView
            android:id="@+id/suggestion_strip_view"
            android:layoutDirection="ltr"
            android:layout_weight="1.0"
            android:layout_width="0dp"
            android:layout_height="@dimen/suggestions_strip_height"
            android:gravity="center_vertical"
            style="?attr/suggestionStripViewStyle" />
        <View
            android:layout_width="@dimen/suggestions_strip_padding"
            android:layout_height="@dimen/suggestions_strip_height"
            style="?attr/suggestionsStripBackgroundStyle" />
    </LinearLayout>

    <!-- To ensure that key preview popup is correctly placed when the current system locale is
         one of RTL locales, layoutDirection="ltr" is needed in the SDK version 17+. -->
    <com.android.inputmethod.keyboard.MainKeyboardView
        android:id="@+id/keyboard_view"
        android:layoutDirection="ltr"
        android:layout_alignParentBottom="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</com.android.inputmethod.latin.InputView>