循环依赖不能RelativeLayout的存在，机器人？

问题描述

限时删除！！

我有以下布局：予需要保持按钮屏幕的底部，它应该是对用户可见。布局的其余部分应该滚动

I have the following layout:I need to keep the button at the bottom of screen and it should be visible to the user.The rest of the layout should scroll.

    <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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.vfc.sargroup.SalesOrderActivity$PlaceholderFragment" >

<ScrollView
    android:id="@+id/scrollView1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_above="@+id/bottomLinearLayout" >

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

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Select Distributor Name"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <Spinner
            android:id="@+id/spinner1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Payment Collection"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ems="10" >
        </EditText>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Product Category"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ems="10" >

            <requestFocus />
        </EditText>

        <TableLayout
            android:id="@+id/salesTableLayout"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:stretchColumns="*" >
        </TableLayout>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Total QTY"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ems="10" >

            <requestFocus />
        </EditText>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Total Price"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ems="10" >

            <requestFocus />
        </EditText>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Remark"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ems="10" >
        </EditText>
    </LinearLayout>
</ScrollView>

<LinearLayout
    android:id="@+id/bottomLinearLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_below="@+id/scrollView1"
    android:layout_centerHorizontal="true"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Submit" />
</LinearLayout>
  </RelativeLayout>

我只是需要做的滚动我的看法，并保持该按钮出现在屏幕上的底部。

I just need to do scroll my view and keep the button appeared on the screen at the bottom.

问题是与

     android:layout_above="@+id/bottomLinearLayout"

我得到的错误

I get the error

     Circular dependencies cannot exist in RelativeLayout

什么是错我的布局？

What is wrong with my layout?

推荐答案

该问题是因为有一个在布局参数的循环引用。

The problem is caused because there is a circular reference in the layout parameters.

例如，当认为B是layout_below视图A，视图A不能引用视图B再在它的下方，alignRight等，这也可以在多个视图之间存在：A引用b号C.在这种情况下C能'由于循环依赖叔参考。

For example, when view B is layout_below view A, view A can't reference view B anymore in it's below, alignRight etc. This can also exist between multiple views: A references B references C. In that scenario C can't reference A because of a circular dependency.

您使用： -

bottomLinearLayout低于scrollView1然后你说，scrollView1高于bottomLinearLayout

bottomLinearLayout is below scrollView1And then you said that scrollView1 is above bottomLinearLayout

忽略了最低位这样的。使用一个

It dosen't work like that.Use one

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