Logcat如下
FATAL EXCEPTION: main
Process: com.coolweather.android, PID: 11807
java.lang.IndexOutOfBoundsException: Index: 6, Size: 0
at java.util.ArrayList.get(ArrayList.java:411)
at com.coolweather.android.ChooseAreaFragment$1.onItemClick(ChooseAreaFragment.java:76)
at android.widget.AdapterView.performItemClick(AdapterView.java:310)
at android.widget.AbsListView.performItemClick(AbsListView.java:1165)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3137)
at android.widget.AbsListView$3.run(AbsListView.java:4052)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6290)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
代码如下
package com.coolweather.android;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.coolweather.android.db.City;
import com.coolweather.android.db.County;
import com.coolweather.android.db.Province;
import com.coolweather.android.util.HttpUtil;
import com.coolweather.android.util.Utility;
import org.litepal.crud.DataSupport;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;
/**
- Created by 王耀祖 on 2017/7/20. */
public class ChooseAreaFragment extends Fragment {
public static final int LEVEL_PROVINCE = 0;
public static final int LEVEL_CITY = 1;
public static final int LEVEL_COUNTY = 2;
private ProgressDialog progressDialog;
private TextView titleText;
private Button backButton;
private ListView listView;
private ArrayAdapter adapter;
private List dataList = new ArrayList<>();
private List provinceList;
private List cityList;
private List countyList;
private Province selectedProvince;
private City selectedCity;
private int currentLevel;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.choose_area, container, false);
titleText = (TextView) view.findViewById(R.id.title_text);
backButton = (Button) view.findViewById(R.id.back_button);
listView = (ListView) view.findViewById(R.id.list_view);
adapter = new ArrayAdapter<String>(getContext(),
android.R.layout.simple_list_item_1, dataList);
listView.setAdapter(adapter);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (currentLevel == LEVEL_PROVINCE) {
selectedProvince = provinceList.get(position);
queryCities();
} else if (currentLevel == LEVEL_CITY) {
selectedCity = cityList.get(position);
queryCounties();
}
}
});
backButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(currentLevel==LEVEL_COUNTY){
queryCities();
}
else if(currentLevel==LEVEL_CITY){
queryProvinces();
}
}
});
queryProvinces();
}
private void queryProvinces(){
titleText.setText("中国");
backButton.setVisibility(View.GONE);
provinceList= DataSupport.findAll(Province.class);
if(provinceList.size()>0){
dataList.clear();
for(Province province:provinceList)
dataList.add(province.getProvinceName());
adapter.notifyDataSetChanged();
listView.setSelection(0);
currentLevel=LEVEL_PROVINCE;
}
else{
String address="http://guolin.tech/api/china";
queryFromServer(address,"province");
}
}
private void queryCities(){
titleText.setText(selectedProvince.getProvinceName());
backButton.setVisibility(View.VISIBLE);
cityList=DataSupport.where("provinceid = ?",String.valueOf(selectedProvince
.getId())).find(City.class);
if(cityList.size()>0) {
cityList.clear();
for(City city:cityList)
dataList.add(city.getCityName());
adapter.notifyDataSetChanged();
listView.setSelection(0);
currentLevel=LEVEL_CITY;
}
else{
int provinceCode=selectedProvince.getProvinceCode();
String address="http://guolin.tech/api/china/"+provinceCode;
queryFromServer(address,"city");
}
}
private void queryCounties(){
titleText.setText(selectedCity.getCityName());
backButton.setVisibility(View.VISIBLE);
countyList=DataSupport.where("cityid = ?",String.valueOf(selectedCity
.getId())).find(County.class);
if(countyList.size()>0) {
countyList.clear();
for(County county:countyList)
dataList.add(county.getCountyName());
adapter.notifyDataSetChanged();
listView.setSelection(0);
currentLevel=LEVEL_COUNTY;
}
else{
int provinceCode=selectedProvince.getProvinceCode();
int cityCode=selectedCity.getCityCode();
String address="http://guolin.tech/api/china/"+provinceCode+"/"+cityCode;
queryFromServer(address,"county");
}
}
private void queryFromServer(String address,final String type){
showProgressDialog();
HttpUtil.sendOkHttpRequest(address, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
closeProgressDialog();
Toast.makeText(getContext(), "加载失败", Toast.LENGTH_SHORT).show();
}
});
}
@Override
public void onResponse(Call call, Response response) throws IOException {
String responseText=response.body().string();
boolean result=false;
if("province".equals(type))
result= Utility.handleProvinceResponse(responseText);
else if("city".equals(type))
result=Utility.handleCityResponse(responseText,selectedProvince.getId());
else if("county".equals(type))
result=Utility.handleCountyResponse(responseText,selectedCity.getId());
if(result){
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
closeProgressDialog();
if("province".equals(type))
queryProvinces();
else if("city".equals(type))
queryCities();
else if("county".equals(type))
queryCounties();
}
});
}
}
});
}
private void showProgressDialog(){
if(progressDialog==null){
progressDialog=new ProgressDialog(getActivity());
progressDialog.setMessage("正在加载。。。");
progressDialog.setCanceledOnTouchOutside(false);
}
progressDialog.show();
}
private void closeProgressDialog(){
if(progressDialog!=null)
progressDialog.dismiss();
}
}