我有很多微调器（总共4个），其中包含json的列表。和微调器之后，它会根据我在微调器上选择的内容进行填充。
这是我的将json发送到微调器的代码（例如，我只放置了2个微调器）
class daftarGedung extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(TambahLaporActivity.this);
pDialog.setMessage("Mengambil Data...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected String doInBackground(String... params) {
link_url = "https://example.com/api/assets?parent=0";
HttpHandler sh = new HttpHandler();
String json = sh.makeServiceCall(link_url);
final boolean ambilspn = gedungSpn.getSelectedItem() == tidakada;
Log.e(TAG, "Response from url: " + json);
if (json != null) {
try {
JSONObject jsonObject = new JSONObject(json);
JSONArray data = jsonObject.getJSONArray("data");
for (int i = 0; i < data.length(); i++) {
JSONObject ar = data.getJSONObject(i);
gedung = ar.getString("nama");
id_gedung_int = ar.getInt("id");
id_gedung1 = ar.getString("id");
Log.d(TAG, String.valueOf(id_gedung_int));
list.add(gedung);
list_id.add(id_gedung1);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
runOnUiThread(new Runnable() {
@Override
public void run() {
data_adapter_gedung.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
gedungSpn.setAdapter(data_adapter_gedung);
Log.e("isi gedung", "" + ambilspn);
if (ambilspn == false) {
gedungSpn.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
// if (gedungSpn.getSelectedItem() != tidakada) {
id_gedung_int = list.indexOf(gedungSpn.getSelectedItem());
id_gedung = list_id.get(id_gedung_int);
list2.clear();
list2_id.clear();
new daftarLantai().execute();
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
komen = "not_selected";
}
});
}
}
});
return null;
}
@Override
protected void onPostExecute(String s) {
pDialog.dismiss();
}
}
class daftarLantai extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(TambahLaporActivity.this);
pDialog.setMessage("Mengambil Data...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected String doInBackground(String... params) {
link_url = "https://monasdev.example.com/api/assets?parent=" + id_gedung;
HttpHandler sh = new HttpHandler();
String json = sh.makeServiceCall(link_url);
final boolean ambilspn = gedungSpn.getSelectedItem() == tidakada;
list2.add(tidakada);
Log.e(TAG, "Response from url: " + json);
if (json != null) {
try {
JSONObject jsonObject = new JSONObject(json);
JSONArray data = jsonObject.getJSONArray("data");
for (int i = 0; i < data.length(); i++) {
JSONObject ar = data.getJSONObject(i);
lantai = ar.getString("nama");
id_lantai1 = ar.getString("id");
if (ambilspn == false) {
list2.add(lantai);
list2_id.add(id_lantai1);
} else {
list2.add(tidakada);
list3.add(tidakada);
list4.add(tidakada);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
runOnUiThread(new Runnable() {
@Override
public void run() {
data_adapter_lantai.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
//
lantaiSpn.setAdapter(data_adapter_lantai);
data_adapter_ruang.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
ruangSpn.setAdapter(data_adapter_ruang);
data_adapter_aset.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
asetSpn.setAdapter(data_adapter_aset);
// Log.e("isi",""+ambilspn);
if (ambilspn == false) {
lantaiSpn.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
id_lantai_int = list2.indexOf(lantaiSpn.getSelectedItem());
id_lantai = list2_id.get(id_lantai_int);
list3.clear();
list3_id.clear();
new daftarRuangan().execute();
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
komen = "not_selected";
}
});
//
} else {
list2.add(tidakada);
list2_id.add(id_lantai1);
}
}
});
return null;
}
@Override
protected void onPostExecute(String s) {
pDialog.dismiss();
}
}
有时有效，有时无效。例如，当我选择第一个微调器的第二个列表时，它将显示错误java.lang.IndexOutOfBoundsException: Invalid index 2, size is 2。并可能是错误java.lang.IndexOutOfBoundsException: Invalid index 5, size is 5等，具体取决于导致应用崩溃的微调器。但是错误总是相同，只是索引（数字）不同。
这是我得到的全部错误
java.lang.IndexOutOfBoundsException: Invalid index 2, size is 2
at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
at java.util.ArrayList.get(ArrayList.java:308)
at com.mqa.android.monas.Activity.TambahLaporActivity$daftarGedung$1$1.onItemSelected(TambahLaporActivity.java:647)
at android.widget.AdapterView.fireOnSelected(AdapterView.java:914)
at android.widget.AdapterView.dispatchOnItemSelected(AdapterView.java:903)
at android.widget.AdapterView.access$300(AdapterView.java:48)
at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:873)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
请帮助我的代码有什么问题
答案 0 :(得分：0)
我没有问题，但是尝试一下并告诉我它是否有效
id_lantai = list2_id.get(id_lantai_int - 1);
答案 1 :(得分：0)
您似乎没有使list2和list2_id保持同步。您可以在许多地方将项目添加到list2而不是list2_id上，因此在运行时
id_lantai_int = list2.indexOf(lantaiSpn.getSelectedItem());
id_lantai = list2_id.get(id_lantai_int);
您可以获得IndexOutOfBoundsException。假设您在list2中有10个项目，但是在list2_id中只有4个项目，那么id_lantai_int的范围可以是0到9。
使持有的list2具有id属性比尝试使两个列表保持同步要更健壮，但是尚不清楚仅根据您的代码看起来会如何已发布。
此外，要获取显示列表中所选项目的索引，您只需将第三个参数（int i）用作onItemSelected