This is my first question so I'll try to do it as best as possible.
The Goal is to have a list that will allow me to click on each item so that it would open a new activity where I'd be able to edit or remove this item.
At the moment I have a tabbed app where I have different fragments representing each tab, and inside these fragments I have a recycle view of all the items to be displayed. I also have a floating button that allows me to add new clients to the first tab (clients). It looks like this:
I've tried several videos on YouTube and blogs to sort this out, but I can't get it to work. My wish would be if I could get that click to work and when it opens the UpdateClient activity it takes the necessary details from that item with it. See here the structure and UpdateClient activity:
App File Structure UpdateClient Activity
So far I've tried creating a button in the fragment itself, but this returns me a null object when trying to reference the id of the edit button (called "update"). I've also tried implementing the OnClickListener in the RecyclerViewAdapter, but no luck either, it just randomly allowed me to click sometimes and still didn't solve my need.
Here is the code so far:
MainActivity
public class MainActivity extends AppCompatActivity {
private AdminDB_Manager db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(this, getSupportFragmentManager());
ViewPager viewPager = findViewById(R.id.view_pager);
viewPager.setAdapter(sectionsPagerAdapter);
TabLayout tabs = findViewById(R.id.tabs);
tabs.setupWithViewPager(viewPager);
FloatingActionButton fab = findViewById(R.id.fab);
// Crear base de datos
db = new AdminDB_Manager(this);
db.open();
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(MainActivity.this, "Adding Client", Toast.LENGTH_LONG).show();
addClient(view);
}
});
}
public void addClient(android.view.View v) {
Intent intent = new Intent(this, AddClient.class);
startActivity(intent);
}
}
ClientFragment
public class ClientsFragment extends Fragment {
// TODO: Customize parameter argument names
private static final String ARG_COLUMN_COUNT = "column-count";
// TODO: Customize parameters
private int mColumnCount = 1;
/**
* Mandatory empty constructor for the fragment manager to instantiate the
* fragment (e.g. upon screen orientation changes).
*/
public ClientsFragment() {
}
// TODO: Customize parameter initialization
@SuppressWarnings("unused")
public static ClientsFragment newInstance(int columnCount) {
ClientsFragment fragment = new ClientsFragment();
Bundle args = new Bundle();
args.putInt(ARG_COLUMN_COUNT, columnCount);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mColumnCount = getArguments().getInt(ARG_COLUMN_COUNT);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_client_list, container, false);
Button update = view.findViewById(R.id.update);
if(update != null){
update.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(getActivity(), "Adding Client", Toast.LENGTH_LONG).show();
Intent intent = new Intent(getActivity(), MainActivity.class);
startActivity(intent);
}
});
}
// Set the adapter
if (view instanceof RecyclerView) {
Context context = view.getContext();
RecyclerView recyclerView = (RecyclerView) view;
if (mColumnCount <= 1) {
recyclerView.setLayoutManager(new LinearLayoutManager(context));
} else {
recyclerView.setLayoutManager(new GridLayoutManager(context, mColumnCount));
}
recyclerView.setAdapter(new MyClientsRecyclerViewAdapter(DummyContent.ITEMS));
}
return view;
}
}
MyClientsRecyclerViewAdapter
public class MyClientsRecyclerViewAdapter extends RecyclerView.Adapter<MyClientsRecyclerViewAdapter.ViewHolder> {
private final List<DummyItem> mValues;
public MyClientsRecyclerViewAdapter(List<DummyItem> items) {
mValues = items;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.fragment_clients, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.mItem = mValues.get(position);
holder.mIdView.setText(mValues.get(position).id);
holder.mContentView.setText(mValues.get(position).content);
}
@Override
public int getItemCount() {
return mValues.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
public final View mView;
public final TextView mIdView;
public final TextView mContentView;
public DummyItem mItem;
public ViewHolder(View view) {
super(view);
mView = view;
mIdView = (TextView) view.findViewById(R.id.item_number);
mContentView = (TextView) view.findViewById(R.id.content);
}
@Override
public String toString() {
return super.toString() + " '" + mContentView.getText() + "'";
}
}
}
Here are the layouts:
fragment_clients.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/item_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/text_margin"
android:textAppearance="?attr/textAppearanceListItem" />
<TextView
android:id="@+id/content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/text_margin"
android:textAppearance="?attr/textAppearanceListItem" />
</LinearLayout>
fragment_clients_list.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/list"
android:name="com.example.app.fragments.ClientsFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
app:layoutManager="LinearLayoutManager"
tools:context=".fragments.ClientsFragment"
tools:listitem="@layout/fragment_clients">
</androidx.recyclerview.widget.RecyclerView>
