问题描述
我得到Error:(26) No resource identifier found for attribute 'srcCompat' in package 'learnapp.android.example.com.learnapp'
当我尝试运行我的应用程序时,我今天才开始学习android.我添加了一个新活动,并在任何xml文件中进行了更改.
I am getting Error:(26) No resource identifier found for attribute 'srcCompat' in package 'learnapp.android.example.com.learnapp'
when I try to run my app.I have just started learning android today.I have added a new activity and dint change anything in any xml files.
这是确切的错误:
Documents/MyProjects/LearnApp/app/src/main/res/layout/activity_display_message.xml
Error:(26) No resource identifier found for attribute 'srcCompat' in package 'learnapp.android.example.com.learnapp'
这是我的activity_display_message.xml
Here is my activity_display_message.xml
<?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:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="learnapp.android.example.com.learnapp.DisplayMessageActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_display_message" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
app:srcCompat="@android:drawable/ic_dialog_email" />
</LinearLayout>
我已经阅读过类似的问题,并且看到其中任一行
I have already read similar questions and saw that either the line
xmlns:app="http://schemas.android.com/apk/res-auto"
或
app:srcCompat="@android:drawable/ic_dialog_email" />
在他们的情况下是错误的,在我的情况下不是.
was wrong in their case which is not in my case.
如果此活动的父活动是MainActivity.java,则很重要
Incase it matters this activity's parent activity is MainActivity.java
推荐答案
我刚刚更改
xmlns:app="http://schemas.android.com/apk/res-auto"
到
xmlns:app="http://schemas.android.com/apk/lib/my_package_name"
我在此处看到了答案
这篇关于在包"learnapp.android.example.com.learnapp"中找不到属性"srcCompat"的资源标识符的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!