Android 将一个布局元素显示在另一个之上

Question

我知道这类问题已经在这里讨论过很多次了。但就我而言 none 他们为我工作。我在带有导航抽屉的项目中使用 AndroidSlidingUpPanel。问题是滑动面板布局总是显示在导航抽屉上方，但我想要的是相反的。这是目前的情况

如您所见，我看不到导航抽屉项目。滑动面板布局隐藏了导航抽屉。

这是我的代码

<?xml version="1.0" encoding="utf-8"?>

<com.sothree.slidinguppanel.SlidingUpPanelLayout xmlns:sothree="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/sliding_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="bottom"
    sothree:umanoDragView="@+id/dragView"
    sothree:umanoOverlay="false"
    sothree:umanoPanelHeight="68dp"
    sothree:umanoParalaxOffset="100dp"
    sothree:umanoShadowHeight="4dp">


    <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/drawerMainActivity"
        android:layout_width="match_parent"
        android:layout_alignParentBottom="true"
        android:layout_height="match_parent">



        <FrameLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/containerView">

            <android.support.v7.widget.Toolbar
                xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:minHeight="?android:attr/actionBarSize"
                android:background="?attr/colorPrimary"
                android:id="@+id/toolBar"
                android:fitsSystemWindows="true"
                android:theme="@style/ThemeOverlay.AppCompat.Dark"
                />

        </FrameLayout>


        <android.support.v7.widget.RecyclerView
            android:layout_width="240dp"
            android:layout_height="match_parent"
            android:id="@+id/recyclerView"
            android:scrollbars="vertical"
            android:background="#FFFFFF"
            android:layout_gravity="left"
            />

     </android.support.v4.widget.DrawerLayout>


    <!-- SLIDING LAYOUT -->
    <LinearLayout
        android:id="@+id/dragView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#ffffff"
        android:clickable="true"
        android:focusable="false"

        android:orientation="vertical">

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

            <TextView
                android:id="@+id/name"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:textColor="@android:color/holo_green_dark"
                android:gravity="center_vertical"
                android:paddingLeft="10dp"
                android:text="@string/slide"
                android:textSize="14sp" />

            <Button
                android:id="@+id/btn_hide"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:gravity="center_vertical|right"
                android:paddingLeft="10dp"
                android:paddingRight="10dp"
                android:text="@string/hide"
                android:textSize="14sp" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#FFCCCC">

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="10dp"
                android:layout_weight="1"
                android:scaleType="centerCrop"
                android:src="@drawable/image" />
        </LinearLayout>
    </LinearLayout>


</com.sothree.slidinguppanel.SlidingUpPanelLayout>

我该如何解决这个问题？这样导航抽屉总是位于滑动面板布局之上。

Answer 1

要设置 Z 轴，您必须对树进行排序。来自文档

View.html#Drawing

The tree is largely recorded and drawn in order, with parents drawn before (i.e., behind) their children, with siblings drawn in the order they appear in the tree. If you set a background drawable for a View, then the View will draw it before calling back to its onDraw() method. The child drawing order can be overridden with custom child drawing order in a ViewGroup, and with setZ(float) custom Z values} set on Views.

所以基本上将抽屉布局设置为最后。

Answer 2

将您的 DrawerLayout 设置为根元素，而不是 SlidingUpPanelLayout

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