在我的布局中获得两个50/50宽度的按钮

Question

i've got a layout that looks like below. But ideally I want the buttons Save and Cancel to be 50% width each, next to each other. Can't quite seem to get them to work though.

Any suggestions?

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="match_parent" >

    <Button
        android:id="@+id/btnMinus"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="-" />

    <EditText
        android:id="@+id/txtCount"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/btnPlus"
        android:layout_alignParentTop="true"
        android:layout_toLeftOf="@+id/btnPlus"
        android:layout_toRightOf="@+id/btnMinus"
        android:ems="10"
        android:inputType="number" >

        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/btnPlus"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:text="+" />

    <Button
        android:id="@+id/btnGo"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/btnMinus"
        android:layout_toRightOf="@+id/button1"
        android:maxWidth="100dp"
        android:text="Save"
        android:width="100dp" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/btnMinus"
        android:text="Cancel" />

</RelativeLayout>

Answer 1

You shouldn't be using a RelativeLayout for this design. You should be using a LinearLayout .

Something like this outline (very stripped-down):

<LinearLayout android:orientation=vertical>
    <LinearLayout android:orientation=horizontal>
        <Button android:layout_width=100 /> <!-- Minus -->
        <EditText android:layout_width=0 android:layout_weight=1 />
        <Button android:layout_width=100 /> <!-- Plus -->
    </LinearLayout>
    <LinearLayout android:orientation=horizontal>
        <Button android:layout_width=0 android:layout_weight=1 /> <!-- Cancel -->
        <Button android:layout_width=0 android:layout_weight=1 /> <!-- Save -->
    </LinearLayout>
</LinearLayout>

Answer 2

Your looking for android:layout_weight="0.5" . This only works with LinearLayouts, though.

So what you could do is add a LinearLayout that contains your two buttons and set the weights then.

Answer 3

您应该仅在按钮的RelativeLayout内使用LinearLayout ，并为其赋予相同的android:layout_weight （根据需要选择1和1、2和2）。