Custom adapter for navigation drawer

Question

I have a working navigation drawer that uses ArrayAdapter as shown in the documentation. I want to set ImageView icons for each of the navigation d

Answer 1

Updated
1) I don't see the source of data to be displayed in your code - you don't pass it in the constructor or any other way
2) In getView() you should set values for your Views
3) To be efficient you have to re-use convertView if it's not null
4) And at last - for your CustomAdapter override also following methods:

    @Override
    public int getViewTypeCount() {
   ...
    }


    @Override
    public int getItemViewType(int position) {
   ...
    }

    @Override
    public int getCount() {
    ...
    }

    @Override
    public YOUR_ITEM_TYPE getItem(int position) {
    ...
    }

    @Override
    public long getItemId(int position) {
    ...
    }

    @Override
    public boolean hasStableIds() {
    ...
    }

    @Override
    public boolean isEmpty() {
    ...
    }

    @Override
    public boolean areAllItemsEnabled() {
    ...
    }

    @Override
    public boolean isEnabled(int position) {
    ...
    }

Answer 2

For your custom adapter:

public class NavDrawerAdapter extends ArrayAdapter<NavDrawerItem>
{
    private final Context context;
    private final int layoutResourceId;
    private NavDrawerItem data[] = null;

    public NavDrawerAdapter(Context context, int layoutResourceId, NavDrawerItem [] data)
    {
        super(context, layoutResourceId, data);
        this.context = context;
        this.layoutResourceId = layoutResourceId;
        this.data = data;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent)
    {
        LayoutInflater inflater = ((Activity) context).getLayoutInflater();

        View v = inflater.inflate(layoutResourceId, parent, false);

        ImageView imageView = (ImageView) v.findViewById(R.id.navDrawerImageView);
        TextView textView = (TextView) v.findViewById(R.id.navDrawerTextView);

        NavDrawerItem choice = data[position];

        imageView.setImageResource(choice.icon);
        textView.setText(choice.name);

        return v;
    }
}

For NavDrawerItem:

public class NavDrawerItem
{
    public int icon;
    public String name;

    public NavDrawerItem(int icon, String name)
    {
        this.icon = icon;
        this.name = name;
    }
}

For drawer_list_item.xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:background="?android:attr/activatedBackgroundIndicator"
    android:minHeight="?android:attr/listPreferredItemHeightSmall"
    android:padding ="10dp">

    <ImageView
        android:id="@+id/navDrawerImageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:paddingRight="10dp"/>

    <TextView
       android:id="@+id/navDrawerTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@+id/navDrawerImageView"
        android:paddingRight="10dp"
        android:textAppearance="?android:attr/textAppearanceListItemSmall"/>

</RelativeLayout>

In MainActivity.java, instantiate an array of NavDrawerItem objects, with the appropriate drawable and name for each, and then pass this array when you set the adapter, like so:

mDrawerList.setAdapter(new YourAdapter(this, R.layout.drawer_list_item, yourArray));