Android Programming The Big Nerd Ranch Guide by Bill Phillips, Chris Stewart, Kristin Marsicano (z-lib.org)

Resolving an Implicit Intent

Next add a RecyclerView.Adapter implementation.

Listing 24.6  RecyclerView.Adapter implementation

(NerdLauncherFragment.java)

public class NerdLauncherFragment extends Fragment {
...
private class ActivityHolder extends RecyclerView.ViewHolder {
...
}

private class ActivityAdapter extends RecyclerView.Adapter {
private final List mActivities;

public ActivityAdapter(List activities) {
mActivities = activities;
}

@Override
public ActivityHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
View view = layoutInflater
.inflate(android.R.layout.simple_list_item_1, parent, false);
return new ActivityHolder(view);
}

@Override
public void onBindViewHolder(ActivityHolder holder, int position) {
ResolveInfo resolveInfo = mActivities.get(position);
holder.bindActivity(resolveInfo);
}

@Override
public int getItemCount() {
return mActivities.size();
}
}
}

Last, but not least, update setupAdapter() to create an instance of ActivityAdapter and set it as the
RecyclerView’s adapter.

Listing 24.7  Setting RecyclerView’s adapter (NerdLauncherFragment.java)

public class NerdLauncherFragment extends Fragment {
...
private void setupAdapter() {
...
Log.i(TAG, "Found " + activities.size() + " activities.");
mRecyclerView.setAdapter(new ActivityAdapter(activities));
}
...
}