Android Studio：错误：找不到与给定名称匹配的资源（在'layout_above'处，值为'@ id / adView'）

Question

I will put a adview (admob) in the bottom of a webview

When I gradle sync, I get this error. Could you please help me to solve this issue?

C:\\Users\\danie\\AndroidStudioProjects\\PokemonDamageCalculator\\app\\src\\main\\res\\layout\\activity_main.xml Error:(20, 31) No resource found that matches the given name (at 'layout_above' with value '@id/adView'). C:\\Users\\danie\\AndroidStudioProjects\\PokemonDamageCalculator\\app\\build\\intermediates\\res\\merged\\debug\\layout\\activity_main.xml Error:(20, 31) No resource found that matches the given name (at 'layout_above' with value '@id/adView'). Error:Execution failed for task ':app:processDebugResources'. com.android.ide.common.process.ProcessException: Failed to execute aapt

This is my MainActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
xmlns:app="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"
tools:context="danilkp1234.com.pokemondamagecalculator.MainActivity">

<include
    layout="@layout/content_main"
    android:layout_width="match_parent"
    android:layout_height="50dp" />

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_above="@id/adView"
    android:layout_weight="1"
    android:orientation="vertical">

    <WebView
        android:id="@+id/webview"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </WebView>
</LinearLayout>

Answer 1

Replace

android:layout_above="@id/adView"

with

android:layout_above="@+id/adView"

Just need to add '+' after '@'

Answer 2

Where is the view with the id adView ?

Also android:layout_above is used for views inside a RelativeLayout , not LinearLayout . In a RelativeLayout views can be placed below, on top or next to each other with android:layout_... attributes. LinearLayout automatically puts views below or next to one another depending on the android:orientation parameter.

If you want to continue using LinearLayout you should remove

android:layout_above="@id/adView"

I hope this helps.

Answer 3

You have an error in android:layout_above="@id/adView" At first try to change @id/adView to @+id/adView.

Also, android:layout_above="" is used in RelativeLayout , hence your LinearLayout won't affect any change. Change the parent LinearLayout to RelativeLayout and then add further View (having id adView ) to affect a change.