我可以使用layout_weight来定位一个RelativeLayout的？ [英] Can I use layout_weight to position a RelativeLayout?

问题描述

我一直在试图整天得到这个工作，我认为，我可以使用 RelativeLayout的

I've been trying all day to get this to work and i think that I can use RelativeLayout

android:layout_weight="0.3"  

放置在右侧的屏幕，而不是居中但30％从上往下的三个按钮。

to place three buttons on the right side of the screen, not centered but 30% down from the top.

这是可能的，如果是的话我怎么办呢？

Is this possible and if so how do I do it?

下面是我的XML，显示下方对方，但在右上角的位置三个按钮：

The following is my XML that shows three buttons underneath each other but in top right position:

   </RelativeLayout>
      <LinearLayout
        android:id="@+id/rightRelativeLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_weight="1"
        android:orientation="vertical"
        >
            <ImageButton
                android:id="@+id/btn_A" 
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="A"
                android:src="@drawable/drawer_1"
                android:background="@android:color/transparent"


            /> 
            <ImageButton
                android:id="@+id/btn_B" 
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:layout_weight="1"
                android:text="B"
                android:src="@drawable/drawer_1"
                android:background="@android:color/transparent"

                android:layout_below="@+id/btn_A"
            />
            <ImageButton
                android:id="@+id/btn_C" 
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:layout_marginTop="10dp"
                android:text="C"
                android:src="@drawable/drawer_1"
                android:background="@android:color/transparent"

                android:layout_below="@+id/btn_B"

            />
        </LinearLayout>

[更新]增加了最终的工作版本的人谁需要它

[UPDATE] Added final working version for people who need it

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:id="@+id/RelativeLayout1"
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical">

    <Gallery xmlns:android="http://schemas.android.com/apk/res/android"
             android:id="@+id/examplegallery" 
             android:layout_width="fill_parent"
             android:layout_height="wrap_content" />
   <RelativeLayout 
        android:id="@+id/InnerRelativeLayout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true" >
    <Button 
        android:id="@+id/btn_newpen_drawtext" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Pen"
    />      
    <EditText 
        android:id="@+id/etx_addtext_drawtext"
        android:layout_width="fill_parent"
        android:layout_toLeftOf="@+id/btn_delete_pen"
        android:layout_toRightOf="@+id/btn_newpen_drawtext"
        android:layout_height="wrap_content"
        android:singleLine="true"
        android:text=""
    />
        <Button 
            android:id="@+id/btn_delete_pen" 
            android:layout_toLeftOf="@+id/btn_save_drawtext"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Del"
        />
        <Button 
            android:id="@+id/btn_save_drawtext" 
            android:layout_alignParentRight="true" 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="save"
        />

   </RelativeLayout>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rightLinerLayoutL0"
    android:layout_width="wrap_content"
    android:layout_height="fill_parent"
    android:layout_toRightOf="@+id/RelativeLayout1"
    android:weightSum="1.0"
    android:layout_alignParentRight="true"
    android:orientation="vertical"
    >
    <LinearLayout android:layout_height="0dp" 
                  android:id="@+id/rightLinerLayoutL1" 
                  android:layout_weight="0.15" 
                  android:layout_width="0dp">
    </LinearLayout>
    <LinearLayout android:layout_height="0dp" 
                  android:orientation="vertical" 
                  android:id="@+id/rightLinerLayoutL2" 
                  android:layout_weight="0.85" 
                  android:layout_width="wrap_content">

        <ImageButton android:text="Button_A" 
            android:background="@android:color/transparent" 
            android:layout_height="wrap_content" 
            android:id="@+id/btn_A" 
            android:layout_width="wrap_content" 
            android:layout_gravity="right" 
            android:src="@drawable/drawer"
            android:onClick="btnAListener">
        </ImageButton>
        <ImageButton android:text="Button_B" 
            android:background="@android:color/transparent" 
            android:layout_height="wrap_content" 
            android:layout_marginTop="10dp"
            android:id="@+id/btn_B" 
            android:layout_width="wrap_content" 
            android:layout_gravity="right" 
            android:src="@drawable/drawer"
            android:onClick="btnBListener">
        </ImageButton>
        <ImageButton android:text="Button_C" 
            android:background="@android:color/transparent" 
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:id="@+id/btn_C" 
            android:layout_width="wrap_content" 
            android:layout_gravity="right" 
            android:src="@drawable/drawer"
            android:onClick="btnCListener">
        </ImageButton>
    </LinearLayout>
</LinearLayout >

</RelativeLayout>

推荐答案

栈2的LinearLayout（L1，L2）为0.3和0.7的权重的部分（和0dp的高度）内的LinearLayout（L0）与垂直方向和总重量1.0。把你的按钮在0.7加权布局（L2）。这会给你30％以上的按键间距。

Stack 2 LinearLayout (L1, L2) sections with weights of 0.3 and 0.7 (and heights of 0dp) inside a LinearLayout (L0) with vertical orientation and total weight of 1.0. Put your buttons in the 0.7 weighted layout (L2). That will give you your spacing of 30% above the buttons.

您可以然后将含有的LinearLayout（L0）内的RelativeLayout的（R0）和地点L0相对于父（R0）的权利，这将使整个事情在屏幕右侧的。

You can then place the containing LinearLayout (L0) inside a RelativeLayout (R0) and place L0 relative to the right of the parent (R0), which will position the entire thing on the right side of the screen.

编辑：我的版本是pretty的多少同米尔德在结束时，除了使用 RelativeLayout的根，所以我可以把 layout_alignParentRight =真正的，以确保它是齐平的权利。唯一的症结点，我发现是确保你第一次的LinearLayout有 FILL_PARENT 高度，使你的间隔确实是屏幕的30％。

My version is pretty much same as Milde in end, except using a root of RelativeLayout so I could put the layout_alignParentRight="true" to ensure it's flush to the right. The only sticking point I found was ensuring your first LinearLayout has height of fill_parent so that your spacer really is 30% of screen.

<?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="fill_parent">
    <LinearLayout android:orientation="vertical" android:layout_height="fill_parent" android:layout_width="wrap_content" android:weightSum="1.0" android:layout_alignParentRight="true">
        <LinearLayout android:layout_weight="0.3" android:layout_height="0dp" android:layout_width="0dp" />
        <LinearLayout android:layout_weight="0.7" android:layout_height="0dp" android:layout_width="wrap_content" android:orientation="vertical">
            <Button android:text="Button 1" android:layout_width="wrap_content" android:layout_height="wrap_content" />
            <Button android:text="Button 2" android:layout_width="wrap_content" android:layout_height="wrap_content" />
            <Button android:text="Button 3" android:layout_width="wrap_content" android:layout_height="wrap_content" />
        </LinearLayout>
    </LinearLayout>
</RelativeLayout>

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