Android xml布局 weight 问题

Question

在下面的代码中，Android studio提示
Layout weights require a widget to be measured twice. When a LinearLayout
with non-zero weights is nested inside another LinearLayout with non-zero
weights ,then the number of measurements increases exponently.
这要怎么改？

//这段是从一段里截取的

   <LinearLayout
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="1">

        <Button
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:text="@string/again"
            android:id="@+id/again"
            android:layout_weight="1"/>

        <Button
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:text="@string/confirm"
            android:id="@+id/confirm"
            android:layout_weight="1" />
    </LinearLayout>

Answer 1

你就一个LinearLayout,你怎么用weight属性呢，两个button有一个父LinearLayout，此LinearLayout有宽度故可以用weight。如果你的LinearLayout也有父节点，就可以用weight。
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<!--设置高度，去掉weight-->

    <Button
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:text="@string/again"
        android:id="@+id/again"
        android:layout_weight="1"/>

    <Button
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:text="@string/confirm"
        android:id="@+id/confirm"
        android:layout_weight="1" />
</LinearLayout>   <LinearLayout
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="0dp"
    android:layout_weight="1">

    <Button
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:text="@string/again"
        android:id="@+id/again"
        android:layout_weight="1"/>

    <Button
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:text="@string/confirm"
        android:id="@+id/confirm"
        android:layout_weight="1" />
</LinearLayout>