ImageView 应该像 Floating Action Button 一样高于一切

Question

我的 MainActivity 中有一个 ImageView，它与浮动操作按钮的位置相同。我希望 ImageView 高于浮动操作按钮等所有内容。目前它看起来像这样： https://gyazo.com/ee0aca8d5bc5061d3e437e6d71575ee8

ImageView 在按钮后面。但我希望它始终在前台，在应用程序的每个站点上。

我的activity_main.XML:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    android:orientation="vertical">


    <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:background="@color/orange"
        android:id="@+id/toolbar"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:title="Tanzverbot Soundboard" />

    <android.support.v4.widget.DrawerLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:id="@+id/drawerLayout">

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

            <ImageView
                android:id="@+id/fab"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom|end"
                android:src="@drawable/tanzit"
                android:adjustViewBounds="true"
                android:maxWidth="50dp"
                android:maxHeight="50dp"
                android:layout_above="@+id/adView"
                android:layout_alignParentRight="true"
                android:layout_alignParentEnd="true"
                android:layout_marginRight="32dp"
                android:layout_marginEnd="32dp"
                android:layout_marginBottom="38dp" />

            <com.google.android.gms.ads.AdView
                android:id="@+id/adView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_alignParentBottom="true"
                ads:adSize="SMART_BANNER"
                android:layout_gravity="bottom|end"
                ads:adUnitId="@string/banner_ad_unit_id">
            </com.google.android.gms.ads.AdView>

        </RelativeLayout>



        <android.support.design.widget.NavigationView
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:id="@+id/shitstuff"
            app:itemTextColor="@color/black"
            app:menu="@menu/drawermenu"
            />


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


</LinearLayout>

Answer 1

您应该改用 FrameLayout，有了它，布局中的最后一个视图将始终位于前景。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    android:orientation="vertical">


    <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:background="@color/orange"
        android:id="@+id/toolbar"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:title="Tanzverbot Soundboard" />

    <android.support.v4.widget.DrawerLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:id="@+id/drawerLayout">

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

            <ImageView
                android:id="@+id/fab"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom|end"
                android:src="@drawable/tanzit"
                android:adjustViewBounds="true"
                android:maxWidth="50dp"
                android:maxHeight="50dp"
                android:layout_above="@+id/adView"
                android:layout_alignParentRight="true"
                android:layout_alignParentEnd="true"
                android:layout_marginRight="32dp"
                android:layout_marginEnd="32dp"
                android:layout_marginBottom="38dp" />

            <com.google.android.gms.ads.AdView
                android:id="@+id/adView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_alignParentBottom="true"
                ads:adSize="SMART_BANNER"
                android:layout_gravity="bottom|end"
                ads:adUnitId="@string/banner_ad_unit_id">
            </com.google.android.gms.ads.AdView>

        </FrameLayout>



        <android.support.design.widget.NavigationView
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:id="@+id/shitstuff"
            app:itemTextColor="@color/black"
            app:menu="@menu/drawermenu"
            />


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


</LinearLayout>

Answer 2

尝试交换 ImageView 和 com.google.android.gms.ads.AdView。此外，您可以尝试为 ImageView

设置海拔

android:elevation="10dp"

Answer 3

试试这个：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    android:orientation="vertical">

    <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:background="@android:color/holo_orange_light"
        android:id="@+id/toolbar"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:title="Tanzverbot Soundboard" />

    <android.support.v4.widget.DrawerLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:id="@+id/drawerLayout">

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

            <com.google.android.gms.ads.AdView
                android:id="@+id/adView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_alignParentBottom="true"
                ads:adSize="SMART_BANNER"
                android:layout_gravity="bottom|end"
                ads:adUnitId="@string/banner_ad_unit_id">
            </com.google.android.gms.ads.AdView>

            <ImageView
                android:id="@+id/fab"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom|end"
                android:src="@mipmap/ic_launcher"
                android:adjustViewBounds="true"
                android:maxWidth="50dp"
                android:maxHeight="50dp"
                android:layout_above="@+id/adView"
                android:layout_alignParentRight="true"
                android:layout_alignParentEnd="true"
                android:layout_marginRight="32dp"
                android:layout_marginEnd="32dp"
                android:layout_marginBottom="38dp" />

        </RelativeLayout>

        <android.support.design.widget.NavigationView
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:id="@+id/shitstuff"
            app:itemTextColor="@color/black"
            app:menu="@menu/drawermenu" />

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

ImageView 应该像 Floating Action Button 一样高于一切

ImageView should be above everything like the Floating Action Button

java

android

imageview

android-fragments

floating-action-button