I am participating in the creation of a project, and I need to create a list containing several CardViews , as the number of cards is not exact, I can not only do in XML .
Does anyone have a clue which way to go right on java ?
When card is clicked it will open another activity .
Create an activity that has a recyclerView:
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.v7.widget.RecyclerView
android:id="@+id/myRecycler"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
In the onCreate of your activity place:
RecyclerView myRecycler = findViewById(R.id.myRecycler);
rvDisciplina.setHasFixedSize(true);
LinearLayoutManager llm = new LinearLayoutManager(this);
llm.setOrientation(LinearLayoutManager.VERTICAL);
SeuAdapter seuAdapter = new SeuAdapter(this,mList);
myRecycler.setAdapter(adapterInfo);
Create an adapter to control views:
public class SeuAdapter extends RecyclerView.Adapter<SeuAdapter.MyViewHolder> {
private List<Aluno> mList;
private LayoutInflater mLayoutInflater;
private Context mContext;
public SeuAdapter(Context c, List<Aluno> l){
mContext = c;
mList = l;
mLayoutInflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = mLayoutInflater.inflate(R.layout.item_layout, viewGroup, false);
MyViewHolder mvh = new MyViewHolder(view);
return mvh;
}
@Override
public void onBindViewHolder(final MyViewHolder myViewHolder, final int position) {
myViewHolder.txtNome.setText(mList.get(position).getNome);
myViewHolder.txtSobrenome.setText(mList.get(position).getSobrenome);
myViewHolder.view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mContext.startActivity(mContext,seuClasse.class);
}
});
}
@Override
public int getItemCount() {
return mList.size();
}
public void addlisItem(Aluno a,int position){
mList.add(a);
notifyItemInserted(position);
}
public class MyViewHolder extends RecyclerView.ViewHolder{
public TextView txtNome;
public TextView txtSobrenome;
public View view;
public MyViewHolder(View itemView) {
super(itemView);
txtNome = (TextView)itemView.findViewById(R.id.txtNome);
txtSobrenome = (TextView)itemView.findViewById(R.id.txtSobrenome);
view = itemView;
}
}
}
Create an xml for your items. Example:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/margin_left_right"
android:layout_marginRight="@dimen/margin_left_right"
android:layout_marginTop="@dimen/margin_top"
android:layout_marginBottom="@dimen/margin_bottom"
app:cardElevation="4dp"
app:cardPreventCornerOverlap="false"
app:cardUseCompatPadding="false"
app:cardMaxElevation="4dp"
app:cardCornerRadius="3dp"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/txtNomeT"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="24sp"
android:textColor="@color/colorSecond"
android:singleLine="true"
android:layout_marginLeft="16dp"
android:text="Nome"
android:layout_gravity="left|center_vertical" />
<TextView
android:id="@+id/txtSobrenome"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:singleLine="true"
android:layout_marginLeft="16dp"
android:text="Nome"
android:layout_gravity="left|center_vertical" />
</LinearLayout>
</android.support.v7.widget.CardView>
Do not forget the compiles.
compile 'com.android.support:cardview-v7:23.1.1'
compile 'com.android.support:recyclerview-v7:23.1.1'
If it was not quite clear to you, I recommend this video lesson recyclerView