Complete source of a simple VerticalGridFragment example

activity_pizza.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <fragment
        android:id="@+id/pizza_grid_fragment"
        android:name="pl.czak.tvtalk.leanbackminimal.PizzaGridFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="pl.czak.tvtalk.leanbackminimal">

    <uses-feature
        android:name="android.software.leanback"
        android:required="true"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity
            android:name=".PizzaGridActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LEANBACK_LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>

</manifest>

build.gradle

apply plugin: 'com.android.application'


android {
    compileSdkVersion 24
    buildToolsVersion "24.0.0"

    defaultConfig {
        applicationId "pl.czak.tvtalk.leanbackminimal"
        minSdkVersion 23
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:recyclerview-v7:24.0.0'
    compile 'com.android.support:leanback-v17:24.0.0'
}

PizzaGridActivity.java

package pl.czak.tvtalk.leanbackminimal;

import android.app.Activity;
import android.os.Bundle;

public class PizzaGridActivity extends Activity {

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

PizzaGridFragment.java

package pl.czak.tvtalk.leanbackminimal;

import android.content.Context;
import android.os.Bundle;
import android.support.v17.leanback.app.VerticalGridFragment;
import android.support.v17.leanback.widget.ArrayObjectAdapter;
import android.support.v17.leanback.widget.ImageCardView;
import android.support.v17.leanback.widget.Presenter;
import android.support.v17.leanback.widget.VerticalGridPresenter;
import android.view.ViewGroup;

public class PizzaGridFragment extends VerticalGridFragment {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setTitle("Title");

        VerticalGridPresenter gridPresenter = new VerticalGridPresenter();
        gridPresenter.setNumberOfColumns(4);
        setGridPresenter(gridPresenter);

        ArrayObjectAdapter adapter = new ArrayObjectAdapter(new PizzaCardPresenter());
        setAdapter(adapter);

        adapter.add("Pizza 1");
        adapter.add("Pizza 2");
        adapter.add("Pizza 3");
        adapter.add("Pizza 4");
        adapter.add("Pizza 5");
        adapter.add("Pizza 6 with a very long title which will not fit");
    }

    private class PizzaCardPresenter extends Presenter {
        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent) {
            return new ViewHolder(new ImageCardView(parent.getContext()));
        }

        @Override
        public void onBindViewHolder(ViewHolder viewHolder, Object item) {
            ImageCardView view = (ImageCardView) viewHolder.view;
            Context context = view.getContext();

            String title = (String) item;

            view.setTitleText(title);
            view.setContentText(null);
            view.setMainImage(context.getDrawable(R.drawable.pizza));
        }

        @Override
        public void onUnbindViewHolder(ViewHolder viewHolder) {

        }
    }
}

styles.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="PizzaCardStyle" parent="Widget.Leanback.ImageCardViewStyle">
        <item name="lbImageCardViewType">Title</item>
        <item name="cardType">infoOver</item>
    </style>

    <style name="PizzaCardImageStyle" parent="Widget.Leanback.ImageCardView.ImageStyle">
        <item name="android:layout_width">200dp</item>
        <item name="android:layout_height">200dp</item>
    </style>

    <style name="PizzaCardTitleStyle" parent="Widget.Leanback.ImageCardView.TitleStyle">
        <item name="android:textAlignment">textEnd</item>
        <!--<item name="android:gravity">center</item>-->
    </style>

    <style name="AppTheme" parent="@style/Theme.Leanback">
        <item name="android:windowBackground">@drawable/background_pizza</item>
        <item name="imageCardViewStyle">@style/PizzaCardStyle</item>
        <item name="imageCardViewImageStyle">@style/PizzaCardImageStyle</item>
        <item name="imageCardViewTitleStyle">@style/PizzaCardTitleStyle</item>
    </style>
</resources>