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 {
        applicat         


        

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

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.

Answer 3

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);
  }
}

Answer 4

You are using android:srcCompat. It should instead by app:srcCompat as it is an attribute defined within AppCompat, not within the android: namespace.

Answer 5

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

Answer 6

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.