我想让recyclerview部分显示mysql数据库中的4个数据。我使用了一个包含多个引用的库，当数据为伪数据时，它没有问题，但是当我将其更改为从数据库获取的数据时，我得到了IndexOutOfBoundsException：Index：5，Size：5 Is有什么解决方法吗？
这里是个例外：
2018-12-28 03:00:51.988 7929-7929/rifafauzi6.id.sectionrecyclerview E/AndroidRuntime: FATAL EXCEPTION: main
Process: rifafauzi6.id.sectionrecyclerview, PID: 7929
java.lang.IndexOutOfBoundsException: Index: 5, Size: 5
at java.util.ArrayList.set(ArrayList.java:427)
at rifafauzi6.id.sectionrecyclerview.adapter.QuestionAdapter.onBindItemViewHolder(QuestionAdapter.java:76)
at io.github.luizgrp.sectionedrecyclerviewadapter.Section.onBindContentViewHolder(Section.java:295)
at io.github.luizgrp.sectionedrecyclerviewadapter.SectionedRecyclerViewAdapter.onBindViewHolder(SectionedRecyclerViewAdapter.java:293)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6673)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6714)
at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5647)
at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5913)
at android.support.v7.widget.GapWorker.prefetchPositionWithDeadline(GapWorker.java:285)
at android.support.v7.widget.GapWorker.flushTaskWithDeadline(GapWorker.java:342)
at android.support.v7.widget.GapWorker.flushTasksWithDeadline(GapWorker.java:358)
at android.support.v7.widget.GapWorker.prefetch(GapWorker.java:365)
at android.support.v7.widget.GapWorker.run(GapWorker.java:396)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
这是代码QuestionAdapter.java：
public class QuestionAdapter extends StatelessSection {
private String title;
private List<Question> listQuestion;
private Context context;
private LayoutInflater inflter;
public static ArrayList<String> kdPertanyaan;
public static ArrayList<String> kdKuesioner;
public static ArrayList<String> selectedAnswers;
public QuestionAdapter(Context context, String title, List<Question> listQuestion) {
super(SectionParameters.builder()
.itemResourceId(R.layout.list_pertanyaan)
.headerResourceId(R.layout.list_title)
.build());
this.context = context;
this.title = title;
this.listQuestion = listQuestion;
kdPertanyaan = new ArrayList<>();
for (int i = 0; i < listQuestion.size(); i++) {
kdPertanyaan.add("Nilai tidak boleh kosong");
}
kdKuesioner = new ArrayList<>();
for (int i = 0; i < listQuestion.size(); i++) {
kdKuesioner.add("Nilai tidak boleh kosong");
}
selectedAnswers = new ArrayList<>();
for (int i = 0; i < listQuestion.size(); i++) {
selectedAnswers.add("Jawaban tidak boleh kosong");
}
inflter = (LayoutInflater.from(context));
}
public void setListQuestion(List<Question> listQuestion) {
this.listQuestion = listQuestion;
}
@Override
public int getContentItemsTotal() {
return listQuestion.size();
}
@Override
public RecyclerView.ViewHolder getItemViewHolder(View view) {
return new ItemViewHolder(view);
}
@Override
public void onBindItemViewHolder(RecyclerView.ViewHolder holder, final int position) {
final ItemViewHolder itemHolder = (ItemViewHolder) holder;
Question question = listQuestion.get(position);
itemHolder.txtKdPertanyaan.setText(kdPertanyaan.set(position, question.getKd_pertanyaan()));
itemHolder.txtKdKuesioner.setText(kdKuesioner.set(position, question.getKd_kuesioner()));
itemHolder.txtNo.setText(question.getNo());
itemHolder.txtPertanyaan.setText(question.getPertanyaan());
itemHolder.question = question;
itemHolder.rb1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// set Yes values in ArrayList if RadioButton is checked
if (isChecked)
selectedAnswers.set(position, "1");
}
});
itemHolder.rb3.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// set Yes values in ArrayList if RadioButton is checked
if (isChecked)
selectedAnswers.set(position, "3");
}
});
itemHolder.rb5.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// set Yes values in ArrayList if RadioButton is checked
if (isChecked)
selectedAnswers.set(position, "5");
}
});
itemHolder.rb7.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// set Yes values in ArrayList if RadioButton is checked
if (isChecked)
selectedAnswers.set(position, "7");
}
});
}
@Override
public RecyclerView.ViewHolder getHeaderViewHolder(View view) {
return new HeaderViewHolder(view);
}
@Override
public void onBindHeaderViewHolder(RecyclerView.ViewHolder holder) {
HeaderViewHolder headerHolder = (HeaderViewHolder) holder;
headerHolder.tvTitle.setText(title);
}
class HeaderViewHolder extends RecyclerView.ViewHolder {
@BindView(R.id.tvTitle) TextView tvTitle;
HeaderViewHolder(View view) {
super(view);
ButterKnife.bind(this, view);
}
}
class ItemViewHolder extends RecyclerView.ViewHolder {
@BindView(R.id.kd_pertanyaan) TextView txtKdPertanyaan;
@BindView(R.id.kd_kuesioner) TextView txtKdKuesioner;
@BindView(R.id.no) TextView txtNo;
@BindView(R.id.question) TextView txtPertanyaan;
@BindView(R.id.rbValueOf1) RadioButton rb1;
@BindView(R.id.rbValueOf3) RadioButton rb3;
@BindView(R.id.rbValueOf5) RadioButton rb5;
@BindView(R.id.rbValueOf7) RadioButton rb7;
Question question;
ItemViewHolder(View view) {
super(view);
ButterKnife.bind(this, view);
}
}
}
这是显示数据的代码：
public class MainActivity extends AppCompatActivity {
@BindView(R.id.rv_pertanyaan) RecyclerView rvPertanyaan;
ProgressDialog loading;
private SectionedRecyclerViewAdapter sectionAdapter;
String KS01 = "KS01";
String KS02 = "KS02";
String KS03 = "KS03";
String KS04 = "KS04";
String titleA = "A. Kompetensi Pedagogik : kemampuan mengelola proses pembelajaran mahasiswa.";
String titleB = "B. Kompetensi Profesional : kemampuan penguasaan materi pelajaran secara luas dan mendalam.";
String titleC = "C. Kompetensi Kepribadian : kemampuan kepribadian yang mantap, berakhlak mulia, arif, dan berwibawa serta menjadi teladan mahasiswa.";
String titleD = "D. Kompetensi Sosial : kemampuan berkomunikasi dan berinteraksi secara efektif dan efisien dengan mahasiswa, sesama dosen, orangtua/wali, dan masyarakat sekitar";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sectionAdapter = new SectionedRecyclerViewAdapter();
loading = new ProgressDialog(this);
ButterKnife.bind(this);
callQuestion1(KS01);
callQuestion2(KS02);
callQuestion3(KS03);
callQuestion4(KS04);
rvPertanyaan.setLayoutManager(new LinearLayoutManager(this));
rvPertanyaan.setHasFixedSize(true);
rvPertanyaan.setAdapter(sectionAdapter);
}
private void callQuestion1(String kd_pertanyaan){
loading.setMessage("Loading ...");
loading.setCancelable(false);
loading.show();
BaseApiService apiService = Server.getUrl().create(BaseApiService.class);
Call<ResponsModelQuestion> getdata = apiService.getPertanyaan(kd_pertanyaan);
getdata.enqueue(new Callback<ResponsModelQuestion>() {
@Override
public void onResponse(@NonNull Call<ResponsModelQuestion> call, @NonNull Response<ResponsModelQuestion> response) {
if (response.isSuccessful()){
loading.dismiss();
Log.d("onResponse", "Message : " + Objects.requireNonNull(response.body()).getKode());
List<Question> listPertanyaan = response.body().getResult();
QuestionAdapter adapter = new QuestionAdapter(getApplicationContext(), titleA, listPertanyaan);
adapter.setListQuestion(listPertanyaan);
sectionAdapter.addSection(adapter);
rvPertanyaan.setAdapter(sectionAdapter);
}
else {
loading.dismiss();
Toast.makeText(getApplicationContext(), "Gagal Mengambil Data Kuesioner !", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onFailure(@NonNull Call<ResponsModelQuestion> call, @NonNull Throwable t) {
loading.dismiss();
Log.e("onFailure : ","Message : "+String.valueOf(t.getMessage()));
Toast.makeText(getApplicationContext(), "Gagal Menghubungkan Internet !", Toast.LENGTH_SHORT).show();
}
});
}
private void callQuestion2(String kd_pertanyaan){
loading.setMessage("Loading ...");
loading.setCancelable(false);
loading.show();
BaseApiService apiService = Server.getUrl().create(BaseApiService.class);
Call<ResponsModelQuestion> getdata = apiService.getPertanyaan(kd_pertanyaan);
getdata.enqueue(new Callback<ResponsModelQuestion>() {
@Override
public void onResponse(@NonNull Call<ResponsModelQuestion> call, @NonNull Response<ResponsModelQuestion> response) {
if (response.isSuccessful()){
loading.dismiss();
Log.d("onResponse", "Message : " + Objects.requireNonNull(response.body()).getKode());
List<Question> listPertanyaan = response.body().getResult();
QuestionAdapter adapter = new QuestionAdapter(getApplicationContext(), titleB, listPertanyaan);
adapter.setListQuestion(listPertanyaan);
sectionAdapter.addSection(adapter);
rvPertanyaan.setAdapter(sectionAdapter);
}
else {
loading.dismiss();
Toast.makeText(getApplicationContext(), "Gagal Mengambil Data Kuesioner !", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onFailure(@NonNull Call<ResponsModelQuestion> call, @NonNull Throwable t) {
loading.dismiss();
Log.e("onFailure : ","Message : "+String.valueOf(t.getMessage()));
Toast.makeText(getApplicationContext(), "Gagal Menghubungkan Internet !", Toast.LENGTH_SHORT).show();
}
});
}
private void callQuestion3(String kd_pertanyaan){
loading.setMessage("Loading ...");
loading.setCancelable(false);
loading.show();
BaseApiService apiService = Server.getUrl().create(BaseApiService.class);
Call<ResponsModelQuestion> getdata = apiService.getPertanyaan(kd_pertanyaan);
getdata.enqueue(new Callback<ResponsModelQuestion>() {
@Override
public void onResponse(@NonNull Call<ResponsModelQuestion> call, @NonNull Response<ResponsModelQuestion> response) {
if (response.isSuccessful()){
loading.dismiss();
Log.d("onResponse", "Message : " + Objects.requireNonNull(response.body()).getKode());
List<Question> listPertanyaan = response.body().getResult();
QuestionAdapter adapter = new QuestionAdapter(getApplicationContext(), titleC, listPertanyaan);
adapter.setListQuestion(listPertanyaan);
sectionAdapter.addSection(adapter);
rvPertanyaan.setAdapter(sectionAdapter);
}
else {
loading.dismiss();
Toast.makeText(getApplicationContext(), "Gagal Mengambil Data Kuesioner !", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onFailure(@NonNull Call<ResponsModelQuestion> call, @NonNull Throwable t) {
loading.dismiss();
Log.e("onFailure : ","Message : "+String.valueOf(t.getMessage()));
Toast.makeText(getApplicationContext(), "Gagal Menghubungkan Internet !", Toast.LENGTH_SHORT).show();
}
});
}
private void callQuestion4(String kd_pertanyaan){
loading.setMessage("Loading ...");
loading.setCancelable(false);
loading.show();
BaseApiService apiService = Server.getUrl().create(BaseApiService.class);
Call<ResponsModelQuestion> getdata = apiService.getPertanyaan(kd_pertanyaan);
getdata.enqueue(new Callback<ResponsModelQuestion>() {
@Override
public void onResponse(@NonNull Call<ResponsModelQuestion> call, @NonNull Response<ResponsModelQuestion> response) {
if (response.isSuccessful()){
loading.dismiss();
Log.d("onResponse", "Message : " + Objects.requireNonNull(response.body()).getKode());
List<Question> listPertanyaan = response.body().getResult();
QuestionAdapter adapter = new QuestionAdapter(getApplicationContext(), titleD, listPertanyaan);
adapter.setListQuestion(listPertanyaan);
sectionAdapter.addSection(adapter);
rvPertanyaan.setAdapter(sectionAdapter);
}
else {
loading.dismiss();
Toast.makeText(getApplicationContext(), "Gagal Mengambil Data Kuesioner !", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onFailure(@NonNull Call<ResponsModelQuestion> call, @NonNull Throwable t) {
loading.dismiss();
Log.e("onFailure : ","Message : "+String.valueOf(t.getMessage()));
Toast.makeText(getApplicationContext(), "Gagal Menghubungkan Internet !", Toast.LENGTH_SHORT).show();
}
});
}
}
答案 0 :(得分：0)
以下代码段导致了异常：
rvPertanyaan.setAdapter(sectionAdapter)
删除此错误将纠正此问题，并且代码没有任何作用。原因是因为如果它获得成功的响应，则在每个callQuestion函数的末尾设置此适配器。除此之外，您还可以移动
的位置rvPertanyaan.setLayoutManager(new LinearLayoutManager(this));
在callQuestion1();函数之上，因为在设置适配器之前确保已设置布局管理器很重要。
关于IndexOutOfBoundsException，您必须注意的一件事是索引和大小。列表的大小从1开始；相反，索引从0开始。当您尝试访问大于该大小的索引时，将导致IndexOutOfBoundsException。