LinearLayout练习

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="To"
            />

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Subject"/>

        <EditText
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="Message"
            android:gravity="top"
            android:layout_weight="1"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:layout_width="260dp"
            android:layout_height="wrap_content"
            android:text="确定"
            android:layout_weight="1"
            />
        <Button
            android:layout_width="260dp"
            android:layout_height="wrap_content"
            android:text="取消"
            android:layout_weight="1"/>
    </LinearLayout>
</LinearLayout>