如何在android线性布局中对齐父底部？

Question

我有一个线性布局

我想在它的底部创建一个切片.

我知道有一些选择,但我有点困惑

1)android:layout_gravity:"bottom"- >由于某些原因,这对我不起作用.

2)android:gravity_weight="0"并给它前面的兄弟姐妹android:gravity_weight:"1"

3)android:height="wrap_content"并给它之前的兄弟姐妹android:height:"match_parent"

我知道如何使用relativeLayout执行此操作,但我想练习linearLayout

你会建议什么？

<?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:background="@color/blue_bg"
    android:orientation="vertical" >

   <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="5dp"
        android:src="@drawable/signup_illu_why" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight=""
        android:orientation="horizontal" />

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/signup_skip_icon" />

</LinearLayout>

Answer 1

实际上,您可以将父元素的重力设置为bottom

<?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:background="@color/blue_bg"
    android:orientation="vertical"
    android:gravity="bottom" >

   <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="5dp"
        android:src="@drawable/signup_illu_why" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight=""
        android:orientation="horizontal" />

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/signup_skip_icon" />

</LinearLayout>

Answer 2

尝试这个

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

       <ImageView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"

            android:src="@drawable/ic_launcher" />
        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
             android:layout_alignParentBottom="true"
            android:orientation="vertical" >

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_launcher" />

    </LinearLayout>

    </RelativeLayout>

Answer 3

<LinearLayout
    android:orientation="vertical"
                              ... >

    <Space
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <SomeViewThatNeedsGoBottom
                             ... />

</LinearLayout>

Answer 4

<?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:background="@android:color/black"
    android:orientation="vertical" 
    android:weightSum="1">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_weight="0.8" >

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_launcher" />

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_launcher" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_weight="0.2" />

</LinearLayout>