在ListView上单击按钮 [英] Button over a ListView

问题描述

如何在ListView上放置Button?像这样的图像?

How is it possible to place a Button over a ListView? Like this image?

我尝试过:

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


    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|right"
        android:text="Button" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge" />
    <ListView 
        android:id="@+id/listView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">

    </ListView>
    </LinearLayout>


</FrameLayout>

但是Button无法访问... ListView和Button都必须可访问.

But the Button is inaccessible... Both the ListView and the Button must be accessible.

推荐答案

首先，您应该使用RelativeLayout; FrameLayout 用于最佳地保存单个子元素.

Firstly, you should be using RelativeLayout; FrameLayout is used to hold a single child element optimally.

第二，从上到下->从后到前依次绘制布局.因此，您希望在XML文件中的Button下方.

Second, the layout is drawn in order from top to bottom -> back to front. Therefore you want your Button below it in the XML file.

最后，您应该使用的是align，而不是align.

Lastly, instead of gravity you should be using align.

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Large Text"
            android:textAppearance="?android:attr/textAppearanceLarge" />
        <ListView 
            android:id="@+id/listView1"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">

        </ListView>
    </LinearLayout>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentBottom="true"
        android:text="Button" />

</RelativeLayout>

这篇关于在ListView上单击按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！