Android ListAdapter using custom ViewGroup over ViewHolder pattern

App.java

package com.example.app;

public class App {
	public String id;
	public String name;
	public String icon_url;

	@Override
	public String toString() {
		return name;
	}
}

app_item.xml

<?xml version="1.0" encoding="utf-8"?>

<com.example.app.AppItemView xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:minHeight="?android:attr/listPreferredItemHeight"
    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd">
    <ImageView
        android:id="@+id/app_icon"
        android:layout_width="@dimen/list_detail_image_size"
        android:layout_height="@dimen/list_detail_image_size"
        />
    <LinearLayout
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:orientation="vertical">
        <TextView
            android:id="@+id/app_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dip"
            android:textAppearance="?android:attr/textAppearanceListItem"
            />
        </LinearLayout>



</com.example.app.AppItemView>

AppItemView.java

package com.example.app;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;
import android.widget.TextView;

import com.squareup.picasso.Picasso;
import com.twitter.crashlytics.R;
import com.twitter.crashlytics.app.ItemView;
import com.twitter.crashlytics.models.App;

import butterknife.InjectView;

public class AppItemView extends ItemView<App> {
    @InjectView(R.id.app_icon) protected ImageView appIcon;
    @InjectView(R.id.app_name) protected TextView appName;

    public AppItemView(Context context) {
        super(context);
    }

    public AppItemView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public AppItemView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    protected void showItem(App app) {
        this.model = app;
        Picasso.with(getContext()).load(model.icon_url).into(appIcon);

        appName.setText(model.name);
    }
}

ItemView.java

package com.example.app;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.LinearLayout;

public abstract class ItemView<Model> extends LinearLayout {
    protected Model model = null;

    public ItemView(Context context) {
        super(context);
    }

    public ItemView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ItemView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    protected abstract void showItem(Model model);
}

ModelAdapter.java

package com.example.app;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;

import java.util.ArrayList;
import java.util.List;

public class ModelAdapter<Model> extends BaseAdapter {

    protected final Context context;
    protected final int layoutId;
    public List<Model> elements = new ArrayList<Model>();


    public ModelAdapter(Context context, int layoutId) {
        this.context = context;
        this.layoutId = layoutId;
    }

    @Override
    public int getCount() {
        return elements.size();
    }

    @Override
    public Model getItem(int position) {
        return elements.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ItemView<Model> view;
        if (convertView == null) {
            view = (ItemView<Model>) LayoutInflater.from(context).inflate(layoutId, parent, false);
        } else {
            view = (ItemView<Model>) convertView;
        }
        Model t = getItem(position);
        view.showItem(t);

        return view;
    }

    public void setData(List<Model> elements) {
        this.elements = elements;
        notifyDataSetChanged();
    }
}