Android的 - 不能得到相对布局对齐父底部 [英] Android - can't get relative layout to align to parent bottom

问题描述

我想补充之上的自定义按钮（的GoogleMap ，虽然我不知道那是多么有关...）片段。

I am trying to add a custom button on top of a (GoogleMap though I'm not sure how relevant that is...) fragment.

我不希望它坐它本身之下 - 就像我可以做的的FrameLayout 或的LinearLayout 的 - 但我想按钮，坐在上面与其父布局是透明的地图...

I don't want it to sit underneath it per se - like I could do with a FrameLayout or LinearLayout - but I want to the button to sit on top of the map with its parent layout being transparent...

这就是我（目前）在我的XML：

This is what I (currently) have in my xml:

<fragment
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    class="com.google.android.gms.maps.SupportMapFragment"
    map:mapType="normal"
    tools:layout="@layout/activity_location">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true" // THIS DOESNT WORK !!!
        android:background="#FC0" // for debug purposes
        android:gravity="center|bottom" >

        <Button
            android:id="@+id/location_order_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/small_margin"
            android:background="@drawable/nav_btn_send"
            android:text=""
            android:textColor="@color/black"
            android:textSize="@dimen/loginFontSize" />
    </RelativeLayout>

</fragment>

请注意上的评论机器人：layout_alignParentBottom和安卓背景'行...

Note the comments on the 'android:layout_alignParentBottom' and 'android:background' lines...

这给了我这样的结果：

现在...你可以通过code，我试图调整这一屏幕/图底部告诉...但无论我做什么，这是调整的顶部，下面的ActionBar ...

Now... you can tell through the code that I am attempting to align this to the screen/map bottom... but whatever I do, it is aligning to the top, underneath the ActionBar...

我都试过，我发现这么几个其他的方法，但这是最接近的结果我想到目前为止...

I have tried a few other approaches that I found on SO, but this is the closest result to what I want so far...

任何想法，我做错了？

推荐答案

您应该这样定义在 RelativeLayout的您的片段：

You should define your fragment inside RelativeLayout in this way:

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

    android:background="#FC0"
    android:gravity="center|bottom" >

    <fragment
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        class="com.google.android.gms.maps.SupportMapFragment"
        map:mapType="normal"
        tools:layout="@layout/activity_location" />

    <Button
        android:id="@+id/location_order_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/small_margin"
        android:background="@drawable/nav_btn_send"
        android:text=""
        android:layout_alignParentBottom="true"
        android:textColor="@color/black"
        android:textSize="@dimen/loginFontSize" />
</RelativeLayout>

和你应该使用 layout_alignParentBottom 的子元素，你想在父母的底部对齐，在这种情况下的财产，这是按钮

and you should use layout_alignParentBottom property in the child element that you want to align at the bottom of the parent, in this case, it is Button

这篇关于Android的 - 不能得到相对布局对齐父底部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！