Can't use srcCompat for ImageViews in android

Question

I'm using the Design Support Library 23.2. I've added these lines in my build.gradle as my Gradle Plugin is version 1.5

defaultConfig {         applicationId "com.abc.xyz"         minSdkVersion 16         targetSdkVersion 23         versionCode 1         versionName "1.0"         generatedDensities = []     }         aaptOptions {           additionalParameters "--no-version-vectors"         }        } 

as it's specified in here

But I can't use the srcCompat attribute for my imageview.

<ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:srcCompat="@drawable/wallpaper"/> 

where @drawable/wallpaper is a vector resource file

<vector xmlns:android="http://schemas.android.com/apk/res/android"     android:width="24dp"     android:height="24dp"     android:viewportWidth="24.0"     android:viewportHeight="24.0"> <path     android:fillColor="#FF000000"     android:pathData="M4,4h7V2H4c-1.1,0 -2,0.9 -2,2v7h2V4zm6,9l-4,5h12l-3,-4 -2.03,2.71L10,13zm7,-4.5c0,-0.83 -0.67,-1.5 -1.5,-1.5S14,7.67 14,8.5s0.67,1.5 1.5,1.5S17,9.33 17,8.5zM20,2h-7v2h7v7h2V4c0,-1.1 -0.9,-2 -2,-2zm0,18h-7v2h7c1.1,0 2,-0.9 2,-2v-7h-2v7zM4,13H2v7c0,1.1 0.9,2 2,2h7v-2H4v-7z"/> 

It says

Error:(14) No resource identifier found for attribute 'srcCompat' in package 'android'

My Gradle version is 1.5. How can I use srcCompat?

Answer 1

Don't

android:srcCompat="@drawable/wallpaper" 

Do

app:srcCompat="@drawable/wallpaper" 

as it srcCompat attribute is actually defined within AppCompat library.

Important you will need to add appropriate namespace for this.

xmlns:app="http://schemas.android.com/apk/res-auto"

Important

what you are getting it seems like it is just a lint error that can be ignored. I have tried and have the same error, but it is working correctly.

you can use tools:ignore="MissingPrefix" to avoid seeing this error temporarily.

Answer 2

Combining many answers into one answer:

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"     android:paddingLeft="@dimen/activity_horizontal_margin"     android:paddingRight="@dimen/activity_horizontal_margin"     android:paddingTop="@dimen/activity_vertical_margin"     android:background="@color/primary">       <android.support.v7.widget.AppCompatImageView         android:layout_width="300dp"         android:layout_height="100dp"         android:id="@+id/logoImageView"         android:layout_centerHorizontal="true"         android:layout_centerVertical="true"         app:srcCompat="@drawable/my_logo_vector"         android:tint="@color/white"         />  </RelativeLayout> 

This worked for me. No lint errors. Use AppCompatImageView.