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?
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.
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.
First (in build.gradle)
defaultConfig {
vectorDrawables.useSupportLibrary = true
}
Second
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/ic_traffic_black_24dp"
tools:ignore="MissingPrefix" />
Third
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
Here we go.
Call app:srcCompat instead of android:srcCompat .
Don't
android:srcCompat="@drawable/your_image"
DO
app:srcCompat="@drawable/your_image"
Finally
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/wallpaper"/>
My gradle version is 1.5
Upgrade your Gradle version.
Solution
Gradle Plugin 2.0+
com.android.tools.build:gradle:2.0.0-beta2
Vector drawables allow you to replace multiple png assets with a single vector graphic, defined in XML. While previously limited to Lollipop and higher devices, both VectorDrawable and AnimatedVectorDrawable are now available through two new Support Libraries support-vector-drawable and support-animated-vector-drawable.
Add this
// Gradle Plugin 2.0+
android {
defaultConfig {
vectorDrawables.useSupportLibrary = true
}
}
You’ll note this new attribute only exists in the version 2.0 of the Gradle Plugin. If you are using Gradle 1.5 you’ll instead use
// Gradle Plugin 1.5
android {
defaultConfig {
generatedDensities = []
}
// This is handled for you by the 2.0+ Gradle Plugin
aaptOptions {
additionalParameters "--no-version-vectors"
}
}
Go Through Support Vector Drawables
there is multiple things which you have to care about First of all use:
defaultConfig {
vectorDrawables.useSupportLibrary = true
}
or
vectorDrawables {
useSupportLibrary = true
}
and Secondly use
<android.support.v7.widget.AppCompatImageView
android:id="@+id/changeLanguages"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:adjustViewBounds="true"
android:background="@color/transparent"
android:scaleType="fitCenter"
app:srcCompat="@drawable/ic_transfer" />
Always use AppCompatImageView or Button because vector image is not supported by Simple ImageView
if all the above methods not worked then use
public class App extends Application {
@Override public void onCreate() {
super.onCreate();
// Make sure we use vector drawables
AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
}
}
If you are using Activity then extend your Activity with AppCompatActivty
public final class MainActivity extends AppCompatActivity {
@Override protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
I just changed:
app:srcCompat="@drawable/wallpaper"
to
android:src="@drawable/wallpaper"
This worked for me.
You are using android:srcCompat. It should instead by app:srcCompat as it is an attribute defined within AppCompat, not within the android: namespace.
update your gradle plugin to 2.0+
// Gradle Plugin 1.5
android {
defaultConfig {
generatedDensities = []
}
// This is handled for you by the 2.0+ Gradle Plugin
aaptOptions {
additionalParameters "--no-version-vectors"
}
as per google developer's blog guid lines
http://android-developers.blogspot.in/2016/02/android-support-library-232.html
From, Android developer site
This library is now a dependency of the v7 AppCompat library, allowing developers and AppCompat to easily use vector drawables.
To use VectorDrawableCompat within an ImageButton or ImageView, use the app:srcCompat XML attribute or setImageResource() method.
To keep referencing attribute IDs on API level 20 or lower, add the following appt flag to your build,gradle file:
If you are building with Android Plugin for Gradle 1.5.0 or lower, add the following to your build.gradle file:
android {
defaultConfig {
// Stops the Gradle’s automatic rasterization of vectors
generatedDensities = []
}
// Flag that tells aapt to keep the attribute ids
aaptOptions {
additionalParameters "--no-version-vectors"
}
}
If you are building with Android Plugin for Gradle 2.0.0 or higher, add the following to your build.gradle file:
android {
defaultConfig {
vectorDrawables.useSupportLibrary = true
}
}
you need to add
xmlns:app="http://schemas.android.com/apk/res-auto"
to your layout for it to work. My "app:srcCompat" was highlighted in red until i added it.
Make sure the picture you are trying to use is PNG format.
Copy the picture.
Go to mipmap on the 1.Project TAB in the android hierarchy.
Click on mipmap once then(On windows ctrl + v ), when you name the photo make sure its lower case letters and no symbols.
The photo should be useable.
Set your image view, (you may have to use a filler color temporarily).
Click on the imageView and then click the srcCompact (the one without the paintbrush and type on @mipmap/"Your pictures name" (This step is in the attributes tab)
That should work!
If you need a Content Description I just used @String/StringPicture
来源：https://stackoverflow.com/questions/35645148/cant-use-srccompat-for-imageviews-in-android