What am I doing wrong

I implemented Epoxy according to the wiki. But I was never able to run the app because I’m getting an error :

Caused by: java.lang.IllegalStateException: You cannot call requestModelBuild directly. Call setData instead to trigger a model refresh with new data.

I’ll post the full code for the epoxy implementation.

EpoxyModelClass(layout = R.layout.header_view)
public abstract class HeaderModel extends EpoxyModelWithHolder<HeaderModel.Holder> {
    @EpoxyAttribute String title;

    @Override
    public void bind(Holder holder) {

        holder.tv.setText(title);
    }

    static class Holder extends EpoxyHolder {
        TextView tv;

        @Override
        protected void bindView(@NonNull View itemView) {
            Log.d("DEBAG", "HeaderModel");
            tv = itemView.findViewById(R.id.name_photo);
        }
    }
}

public class PhotoController  extends Typed2EpoxyController<List<SemiAutomaticWeldingData>, Boolean> {
    @AutoModel HeaderModel_ headerModel;

    @Override
    protected void buildModels(List<SemiAutomaticWeldingData> data1, Boolean data2) {
        headerModel
                .title("Hello Lokki")
                .addTo(this);

        for (SemiAutomaticWeldingData photo : data1) {
            new HeaderModel_()
                    .title(photo.getTitle())
                    .addTo(this);
        }
    }
}

public class Activitys extends AppCompatActivity {
    private EpoxyRecyclerView epoxyRecyclerView;
    private PhotoController photoController;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.epoxy_activity);

        epoxyRecyclerView = findViewById(R.id.epoxy_rv);
        photoController = new PhotoController();

        epoxyRecyclerView.setControllerAndBuildModels(photoController);
        epoxyRecyclerView.requestModelBuild();
        
    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/name_photo"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

I use Studio Android 3.2 Canary 8.
My gradle looks like the following.

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "ua.com.dynamicrecyclerview.drawingreadingswelder"
        minSdkVersion 19
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
//    mvvm этап 1

    dataBinding {
        enabled = true
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.appcompat:appcompat:1.0.0-alpha1'
    implementation 'androidx.recyclerview:recyclerview:1.0.0-alpha1'
    implementation 'androidx.cardview:cardview:1.0.0-alpha1'
    implementation 'com.google.android.material:material:1.0.0-beta01'

    implementation 'androidx.constraintlayout:constraintlayout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.0-alpha3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha3'

    //Glide
    implementation 'com.github.bumptech.glide:glide:4.7.1'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.7.1'

    //Retrofit
    implementation "com.squareup.retrofit2:retrofit:${rootProject.ext.retrofit}"
    implementation "com.squareup.retrofit2:adapter-rxjava2:${rootProject.ext.retrofit}"
    implementation "com.squareup.retrofit2:converter-gson:${rootProject.ext.retrofit}"

    //RxJava2
    implementation 'io.reactivex.rxjava2:rxjava:2.1.5'
    implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'

    //epoxy

    implementation 'com.airbnb.android:epoxy:3.0.0-rc1'
    annotationProcessor 'com.airbnb.android:epoxy-processor:3.0.0-rc1'


}

[Sergiyss]

@elihart Thanks. Indeed, match_parent was my problem.

[martymiller]

I had the same issue. The documentation used a Typed2EpoxyController in their example and then tells you to call setControllerAndBuildModels() which calls requestModelBuild() on the controller which throws the exception. That call supposedly only works for EpoxyController.