我必须在 RecyclerView 中按部分列出来自 API 的消耗数据，以及我通过 API 获取的该部分的名称，但是应用程序在到达 时会关闭onBindViewHolder 但有异常(exception)
FATAL EXCEPTION: main Process: [package], PID: 25882 java.lang.IndexOutOfBoundsException: Index: 3, Size: 2 at java.util.ArrayList.get(ArrayList.java:437)
at NewPatrimonio.Adapter.PatrimonioReferenciaAdapter.onBindViewHolder(PatrimonioReferenciaAdapter.java:32)
MyJson:
[
{
"familia": "ATENDIMENTO",
"patrimonios": [
{
"descricao": "PORTEIRO",
"controle": "68D60C5DFFF27C6D7B6E6D2BF7C9E8B0",
"quantidade": 0
},
{
"descricao": "RECEPCIONISTA",
"controle": "CBC9D1C219BAF179310A2C9A5AE94921",
"quantidade": 0
}
]
},
{
"familia": "COLABORADORES",
"patrimonios": [
{
"descricao": "EQUIPE DE ADMINISTRAÇÃO",
"controle": "ADAD1F3A829F53387354E97FE3DD9026",
"quantidade": 1
},
{
"descricao": "EQUIPE DE ATENDIMENTO",
"controle": "959BCCAEE13EB0E9A62AB7231077B0F2",
"quantidade": 0
},
{
"descricao": "EQUIPE DE JARDINAGEM",
"controle": "798ABCFCA7ECFD727B751CC42C1E3E77",
"quantidade": 0
},
{
"descricao": "EQUIPE DE LIMPEZA",
"controle": "3E2F32AB45C9EC327DD4A105BB838FC9",
"quantidade": 0
}
]
},
{
"familia": "GERAL",
"patrimonios": [
{
"descricao": "AJUDANTE",
"controle": "11F08FC1F04E361F661DC76820AAABB7",
"quantidade": 1
},
{
"descricao": "FISCAL",
"controle": "EEFC72871E5201D5752F12BF97B8368B",
"quantidade": 0
}
]
},
{
"familia": "LIMPEZA",
"patrimonios": [
{
"descricao": "FAXINEIRO",
"controle": "A84EB5A2B0B25FCA905DC6DDC07B9598",
"quantidade": 0
}
]
}
]
我的模型:
public class ModelNovoReferencia {
@SerializedName("familia")
@Expose
private String familia;
@SerializedName("patrimonios")
@Expose
private List<Patrimonio> patrimonios = null;
public String getFamilia() {
return familia;
}
public void setFamilia(String familia) {
this.familia = familia;
}
public List<Patrimonio> getPatrimonios() {
return patrimonios;
}
public void setPatrimonios(List<Patrimonio> patrimonios) {
this.patrimonios = patrimonios;
}
public class Patrimonio {
@SerializedName("descricao")
@Expose
private String descricao;
@SerializedName("controle")
@Expose
private String controle;
@SerializedName("quantidade")
@Expose
private Integer quantidade;
public String getDescricao() {
return descricao;
}
public void setDescricao(String descricao) {
this.descricao = descricao;
}
public String getControle() {
return controle;
}
public void setControle(String controle) {
this.controle = controle;
}
public Integer getQuantidade() {
return quantidade;
}
public void setQuantidade(Integer quantidade) {
this.quantidade = quantidade;
}
}
}
我的适配器:
public class PatrimonioReferenciaAdapter extends RecyclerView.Adapter<PatrimonioReferenciaAdapter.ReferenciaVH> {
List<ModelNovoReferencia> mListaReferencia;
ModelNovoReferencia.Patrimonio patrimonio;
public PatrimonioReferenciaAdapter(List<ModelNovoReferencia> mDadosReferencia) {
this.mListaReferencia = mDadosReferencia;
}
@Override
public ReferenciaVH onCreateViewHolder(ViewGroup parent, int viewType) {
View itemListaRelacao = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_novo_referencia, parent, false);
return new ReferenciaVH(itemListaRelacao);
}
@Override
public void onBindViewHolder(ReferenciaVH holder, int position) {
holder.txtFamilia.setText(mListaReferencia.get(position).getFamilia());
holder.txtDescricao.setText(mListaReferencia.get(position).getPatrimonios().get(position).getDescricao());
}
@Override
public int getItemCount() {
return mListaReferencia.size();
}
public class ReferenciaVH extends RecyclerView.ViewHolder {
TextView txtFamilia, txtDescricao, txtQuantidade;
public ReferenciaVH(View itemView) {
super(itemView);
txtFamilia = (TextView) itemView.findViewById(R.id.txtFamilia);
txtDescricao = (TextView) itemView.findViewById(R.id.txtDescricaoRef);
txtQuantidade = (TextView) itemView.findViewById(R.id.txtQtdRef);
}
}
}
MyRow:
<android.support.constraint.ConstraintLayout 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">
<TextView
android:id="@+id/txtFamilia"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Sem família"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<android.support.v7.widget.CardView
android:layout_width="0dp"
android:layout_height="70dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="3dp"
app:cardElevation="4dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtFamilia">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/txtDescricaoRef"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="TextView"
android:textAlignment="center"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/txtQtdRef"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Quantidade já cadastrados"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txtDescricaoRef" />
</android.support.constraint.ConstraintLayout>
</android.support.v7.widget.CardView>
</android.support.constraint.ConstraintLayout>
我做错了什么或者正确的实现是什么？
最佳答案
问题出在这一行:
holder.txtDescricao.setText(mListaReferencia.get(position).getPatrimonios().get(position).getDescricao());
具体来说，问题出在双重 get() 调用中:
mListaReferencia.get(position).getPatrimonios().get(position)
onBindViewHolder() 的 position 参数只能用于索引 mListaReferencia，而不能用于索引patrimonios 子列表。您如何解决这个问题将取决于您想要的最终行为。
看来您真正想要的实际上相当复杂(一个 RecyclerView 使用两种不同的 View 类型，一种用于显示 ModelNovoReferencia.familia ，另一种用于显示 Patrimonio信息)。我不会在这里提供有关如何执行此操作的完整教程；只需搜索“RecyclerView 多种 View 类型”即可。
目前，您可以通过将 onBindViewHolder() 更改为如下内容来解决该问题:
@Override
public void onBindViewHolder(ReferenciaVH holder, int position) {
holder.txtFamilia.setText(mListaReferencia.get(position).getFamilia());
holder.txtDescricao.setText("" + mListaReferencia.get(position).getPatrimonios().size());
}
关于java - 具有动态部分的 RecyclerView，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/51661141/