这段代码是用Java编程语言编写的，使用Firebase Firestore数据库来检索数据。代码获取多个用户的动态数据，每个用户有多个测试。数据包括停留时间、飞行时间 2 和飞行时间 3，以及测试名称。
代码循环遍历每个用户并检索每个用户的动态数据。然后循环遍历该用户的每个测试并检索停留时间、飞行时间 2、飞行时间 3 和测试名称。检索到的数据存储在各种列表中。在为所有用户循环所有测试后，代码创建属性和类并将数据存储在 SharedPreferences 对象中。
但似乎我一直收到此错误：
java.lang.ArrayIndexOutOfBoundsException: length=29; index=29
at weka.core.DenseInstance.setValue(DenseInstance.java:242)
at com.example.projetm.data.Getdata$1$1$2.<init>(Getdata.java:188)
at com.example.projetm.data.Getdata$1$1.onComplete(Getdata.java:185)
这是我的代码：
` public String Class(Context 上下文) 抛出异常 {
//hna nkharej ga3 les utilisateurs
db.collection("users").get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
@Override
public void onComplete(@NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()) {
int numusers = task.getResult().size(); //hna nedi nombre des utilisateurs
Log.d("nombre d'utilisateurs", String.valueOf(numusers));
for (QueryDocumentSnapshot doc : task.getResult()) { //apres nboucle les utilisateurs
String id = doc.getId(); // nedi id ta3ah
//apres nedi dynamique de chaque utilisateurs
db.collection("users").document(id).collection("dynamic").get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
@Override
public void onComplete(@NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()) {
y++; // w koul ma nedi test nzid f y
nombre_instance += task.getResult().size(); //w nmed l nombre instance le nombre de test
Log.d("getdata ch7al mel instance", String.valueOf(nombre_instance));
for (QueryDocumentSnapshot document : task.getResult()) { //apres nboucle les tests
// Log.d("data type", document.get("dwell time").getClass().getSimpleName());
List<Long> dwellTimes = (List<Long>) document.get("dwell time");
//ArrayList<Long> dwellTimes = (ArrayList<Long>) document.get("dwell time");
dwell.addAll(dwellTimes);
List<Long> flight2 = (List<Long>) document.get("dwell time");
//ArrayList<Long> flightTimes2 = (ArrayList<Long>) document.get("flight time 2");
flightm2.addAll(flight2);
List<Long> flight3 = (List<Long>) document.get("dwell time");
//ArrayList<Long> flightTimes3 = (ArrayList<Long>) document.get("flight time 3");
flightm3.addAll(flight3);
name.add(document.getString("nom"));
Log.d("getdata1", "y = " + y);
}
if (y == numusers) { //apres ki y yweli 9ad le nombre des utilisateurs sema da ga3 les tests ydir la suite
Log.d("getdata", "wsel");
//hna apres ncreeo data
preferences = context.getSharedPreferences(PREFS, Context.MODE_PRIVATE);
//nsamo les atributs
final Attribute Attribute1 = new Attribute("dwelltime1");
final Attribute Attribute2 = new Attribute("dwelltime2");
final Attribute Attribute3 = new Attribute("dwelltime3");
final Attribute Attribute4 = new Attribute("dwelltime4");
final Attribute Attribute5 = new Attribute("dwelltime5");
final Attribute Attribute6 = new Attribute("dwelltime6");
final Attribute Attribute7 = new Attribute("dwelltime7");
final Attribute Attribute8 = new Attribute("dwelltime8");
final Attribute Attribute9 = new Attribute("dwelltime9");
final Attribute Attribute10 = new Attribute("dwelltime10");
final Attribute Attribute11 = new Attribute("flighttime2_1");
final Attribute Attribute12 = new Attribute("flighttime2_2");
final Attribute Attribute13 = new Attribute("flighttime2_3");
final Attribute Attribute14 = new Attribute("flighttime2_4");
final Attribute Attribute15 = new Attribute("flighttime2_5");
final Attribute Attribute16 = new Attribute("flighttime2_6");
final Attribute Attribute17 = new Attribute("flighttime2_7");
final Attribute Attribute18 = new Attribute("flighttime2_8");
final Attribute Attribute19 = new Attribute("flighttime2_9");
final Attribute Attribute20 = new Attribute("flighttime3_1");
final Attribute Attribute21 = new Attribute("flighttime3_2");
final Attribute Attribute22 = new Attribute("flighttime3_3");
final Attribute Attribute23 = new Attribute("flighttime3_4");
final Attribute Attribute24 = new Attribute("flighttime3_5");
final Attribute Attribute25 = new Attribute("flighttime3_6");
final Attribute Attribute26 = new Attribute("flighttime3_7");
final Attribute Attribute27 = new Attribute("flighttime3_8");
final Attribute Attribute28 = new Attribute("flighttime3_9");
List<String> classes = new ArrayList<String>() {
{
add("user1");
add("user2");
add("user3");
}
}; //w ndir les classe
//apres n ajoutou les attributs f fastvecteur
Attribute AttributeClass = new Attribute("class", classes);
FastVector fastVector = new FastVector(nombre_attribute);
fastVector.addElement(Attribute1);
fastVector.addElement(Attribute2);
fastVector.addElement(Attribute3);
fastVector.addElement(Attribute4);
fastVector.addElement(Attribute5);
fastVector.addElement(Attribute6);
fastVector.addElement(Attribute7);
fastVector.addElement(Attribute8);
fastVector.addElement(Attribute9);
fastVector.addElement(Attribute10);
fastVector.addElement(Attribute11);
fastVector.addElement(Attribute12);
fastVector.addElement(Attribute13);
fastVector.addElement(Attribute14);
fastVector.addElement(Attribute15);
fastVector.addElement(Attribute16);
fastVector.addElement(Attribute17);
fastVector.addElement(Attribute18);
fastVector.addElement(Attribute19);
fastVector.addElement(Attribute20);
fastVector.addElement(Attribute21);
fastVector.addElement(Attribute22);
fastVector.addElement(Attribute23);
fastVector.addElement(Attribute24);
fastVector.addElement(Attribute25);
fastVector.addElement(Attribute26);
fastVector.addElement(Attribute27);
fastVector.addElement(Attribute28);
fastVector.addElement(AttributeClass);
//apres ncrreo instance avec nom dynamic w nmedo le nombre d'instance
Instances instances = new Instances("dynamics", fastVector, nombre_instance);
instances.setClassIndex(instances.numAttributes() - 1);
String nom = String.valueOf(name);
// Log.d("taille", String.valueOf(finalDwell.size()));
for (int i = 0; i < nombre_instance; i++) {
List<Long> finaldwell = dwell;
List<Long> finalflight2 = flightm2;
List<Long> finalflight3 = flightm3;
DenseInstance denseInstance = new DenseInstance(instances.numAttributes()) {
{
for (int j = 0; j < finaldwell.size(); j++) {
setValue(j, preferences.getLong("dwelltime" + (j+1), finaldwell.get(j)));
}
for (int j = 0; j < finalflight2.size(); j++) {
setValue(j + finaldwell.size(), preferences.getLong("flighttime2_" + (j+1), finalflight2.get(j)));
}
for (int j = 0; j < finalflight3.size(); j++) {
setValue(j + finaldwell.size() + finalflight2.size(), preferences.getLong("flighttime3_" + (j+1), finalflight3.get(j)));
}
}
}; Log.d("zzz", "i" + i);
instances.add(denseInstance);
}
Log.d("getdata", instances.toString()); // w n affichi les donnees f log
}`
我尝试了一切关于如何解决这个问题的任何建议或想法？我将非常感谢我的最后一年项目