我的RecyclerView在警报对话框中未显示任何值。我很困惑，不知道我应该在代码中哪里寻找问题。我希望你们中的一些人遇到同样的问题。
这是我调用RecycleView和AlertDialog的活动。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pondeljak = (Button) findViewById(R.id.buttonPonedeljak);
utorak = (Button) findViewById(R.id.buttonUtorak);
sreda = (Button) findViewById(R.id.buttonSreda);
cetvrtak = (Button) findViewById(R.id.buttonCetvrtak);
petak = (Button) findViewById(R.id.buttonPetak);
db = new DataDays(this);
View view = getLayoutInflater().inflate(R.layout.casovi,null);
alertDialogBuilder = new AlertDialog.Builder(this);
alertDialogBuilder.setView(view);
alertDialog = alertDialogBuilder.create();
recyclerView = (RecyclerView) view.findViewById(R.id.recycleCasoviID);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
casoviList = new ArrayList<>();
casoviItems = new ArrayList<>();
// for (Casovi c: casoviList){
Casovi casovi = new Casovi();
//casovi.setId(0);
casovi.setDan("asas");
casovi.setRedniBrCasa("ssss");
casovi.setNzaivCasa("ssddff");
casoviItems.add(casovi);
recycleViewAdapter = new RecycleViewAdapter(this, casoviItems);
recyclerView.setAdapter(recycleViewAdapter);
recycleViewAdapter.notifyDataSetChanged();
pondeljak.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (db.casoviCountPondeljak() == 0){
Intent intent = new Intent(MainActivity.this, Unos_casova.class);
intent.putExtra("Dan", "Pondeljak");
startActivity(intent);
}else {
alertDialog.show();
}
这是RecycleView类。我不确定，也许这有问题吗？
public class RecycleViewAdapter extends RecyclerView.Adapter<RecycleViewAdapter.ViewHolder> {
private Context context;
private List<Casovi> casoviItems;
public RecycleViewAdapter(Context context, List<Casovi> casoviItems) {
this.context = context;
this.casoviItems = casoviItems;
}
@Override
public RecycleViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.prikaz_casova, parent,false);
return new ViewHolder(view, context);
}
@Override
public void onBindViewHolder( RecycleViewAdapter.ViewHolder holder, int position) {
Casovi casovi = new Casovi();
holder.redniBrCasPrikaz.setText(casovi.getRedniBrCasa());
holder.nazivCasPrikaz.setText(casovi.getRedniBrCasa());
}
@Override
public int getItemCount() {
return casoviItems.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView redniBrCasPrikaz;
public TextView nazivCasPrikaz;
public Button delteBtn;
public Button editBtn;
public CardView cardView;
public ViewHolder(View view, Context ctx) {
super(view);
context = ctx;
redniBrCasPrikaz = (TextView) view.findViewById(R.id.rednibrojCasaID);
nazivCasPrikaz = (TextView) view.findViewById(R.id.nazivcasaID);
delteBtn = (Button) view.findViewById(R.id.obrisiCasBtnID);
editBtn = (Button) view.findViewById(R.id.izmeniCasBtnID);
cardView = (CardView) view.findViewById(R.id.carViewID);
}
}
布局casovi。应该附加关于女巫prikaz casova的RecycleView。
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
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:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycleCasoviID"
android:layout_width="match_parent"
android:layout_height="574dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.283" />
</android.support.constraint.ConstraintLayout>
布局prikaz_casova。此布局应显示db中的值。在我发布的这个示例中，有哈希值可以显示。
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
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:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.CardView
android:id="@+id/carViewID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="133dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="470dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.471">
<RelativeLayout
android:id="@+id/relativniID"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="@+id/rednibrojCasaID"
android:layout_width="126dp"
android:layout_height="wrap_content"
android:text="redni broj casa"
android:textSize="14dp"
android:textStyle="italic"
/>
<TextView
android:id="@+id/nazivcasaID"
android:layout_width="338dp"
android:layout_height="105dp"
android:layout_below="@+id/rednibrojCasaID"
android:layout_marginTop="1dp"
android:text="Naziv casa"
android:textSize="24dp"
android:textStyle="bold" />
<Button
android:id="@+id/obrisiCasBtnID"
android:layout_width="40dp"
android:layout_height="37dp"
android:layout_below="@+id/rednibrojCasaID"
android:layout_toRightOf="@+id/nazivcasaID"
android:background="@drawable/delete" />
<Button
android:id="@+id/izmeniCasBtnID"
android:layout_width="40dp"
android:layout_height="37dp"
android:layout_below="@+id/obrisiCasBtnID"
android:layout_marginLeft="3dp"
android:layout_marginTop="15dp"
android:layout_toRightOf="@+id/nazivcasaID"
android:background="@drawable/edit" />
</RelativeLayout>
</android.support.v7.widget.CardView>
</android.support.constraint.ConstraintLayout>
答案 0 :(得分：0)
这是您在RecyclerView Adapter类中犯的错误。
@Override
public void onBindViewHolder( RecycleViewAdapter.ViewHolder holder, int position) {
Casovi casovi =新的Casovi（）;
应该是
Casovi casovi = casoviItems.get(position);
holder.redniBrCasPrikaz.setText(casovi.getRedniBrCasa());
holder.nazivCasPrikaz.setText(casovi.getRedniBrCasa());
}
您都做完了