app启动之后没有报错，但是进了省之后，再进入城市，县的数据显示不出来，一直显示在加载。查了一天网站了，还是没有解决，有谁能我看看我吗？
ChooseAreaFragment代码
import android.app.ProgressDialog; import android.os.Bundle; 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 androidx.appcompat.widget.ButtonBarLayout; import androidx.fragment.app.Fragment;
import com.example.coolweather.db.City; import com.example.coolweather.db.County; import com.example.coolweather.db.Province; import com.example.coolweather.util.HttpUtil; import com.example.coolweather.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;
public class ChooseAreaFrament 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<String> adapter;
private List<String> dataList = new ArrayList<>();
/**
* 省列表
*/
private List<Province> provinceList;
/**
* 市列表
*/
private List<City> cityList;
/**
* 县列表
*/
private List<County>countyList;
/**
* 选中的省份
*/
private Province selectedProvince;
/**
* 选中的城市
*/
private City selectedCity;
/**
* 当前选中的级别
*/
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<>(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();
}
/**
* 查询全国所有的省，优先数据库查询，如果没有查询到再去服务器上查询
*/
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");
}
}
/**
* 查询全国所有的城市，优先数据库查询，如果没有查询到再去服务器上查询
*/
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){
dataList.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");
}
}
/**
* 查询全国所有的县，优先数据库查询，如果没有查询到再去服务器上查询
*/
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 ){
dataList.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");
}
}
/**
* 根据传入的地址和类型从服务器上查询省市县数据
*/
private void queryFromServer(String address,final String type){
showProgressDialog();
HttpUtil.sendOkHttpRequest(address, new Callback() {
@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();
}
});
}
}
@Override
public void onFailure(Call call, IOException e) {
//通过runOnUiTread()方法回到主线程处理逻辑
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
closeProgressDialog();
Toast.makeText(getContext(),"加载失败",Toast.LENGTH_SHORT).show();
}
});
}
});
}
/**
* 显示进度对话框
*/
private void showProgressDialog(){
if (progressDialog == null){
progressDialog = new ProgressDialog(getActivity());
progressDialog.setMessage("正在加载...");
progressDialog.setCanceledOnTouchOutside(false);
}
progressDialog.show();
}
/**
* 关闭进度对话框
*/
private void closeProgressDialog(){
if (progressDialog != null){
progressDialog.dismiss();
}
}
}
Utility代码 import android.text.TextUtils;
import com.example.coolweather.db.City; import com.example.coolweather.db.County; import com.example.coolweather.db.Province;
import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject;
public class Utility {
/**
* 解析和处理服务器返回的省级数据
*/
public static boolean handleProvinceResponse(String response){
if (!TextUtils.isEmpty(response)){
try {
JSONArray allProvinces = new JSONArray(response);
for (int i = 0;i<allProvinces.length();i++){
JSONObject provinceObject = allProvinces.getJSONObject(i);
Province province = new Province();
province.setProvinceName(provinceObject.getString("name"));
province.setProvinceCode(provinceObject.getInt("id"));
province.save();
}
return true;
} catch (JSONException e) {
e.printStackTrace();
}
}
return false;
}
/**
* 解析服务器和处理器返回的市级数据
*/
public static boolean handleCityResponse(String response,int provinceId){
if(!TextUtils.isEmpty(response)){
try {
JSONArray allCities = new JSONArray(response);
for(int i=0;i<allCities.length();i++){
JSONObject cityObject = allCities.getJSONObject(i);
City city = new City();
city.setCityName(cityObject.getString("name"));
city.setCityCode(cityObject.getInt("id"));
city.setProvinceId(provinceId);
city.save();
}
return true;
} catch (JSONException e) {
e.printStackTrace();
}
}
return false;
}
public static boolean handleCountyResponse(String response, int cityId){
if(TextUtils.isEmpty(response)){
try {
JSONArray allCounties = new JSONArray(response);
for(int i=0;i<allCounties.length();i++){
JSONObject countyObject = allCounties.getJSONObject(i);
County county = new County();
county.setCountyName(countyObject.getString("name"));
county.setWeatherId(countyObject.getString("weather_id"));
county.setCityId(cityId);
county.save();
}
return true;
} catch (JSONException e) {
e.printStackTrace();
}
}
return false;
}
}
HttpUtil代码 import okhttp3.OkHttpClient; import okhttp3.Request;
public class HttpUtil {
public static void sendOkHttpRequest(String address,okhttp3.Callback callback) {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(address).build();
client.newCall(request).enqueue(callback);
}
}
app apply plugin: 'com.android.application'
android { compileSdkVersion 29 buildToolsVersion "29.0.2" defaultConfig { applicationId "com.example.coolweather" minSdkVersion 15 targetSdkVersion 29 versionCode 1 versionName "1.0" testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } sourceSets { main { jniLibs.srcDirs = ['libs'] } } }
dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation 'androidx.appcompat:appcompat:1.0.2' implementation 'androidx.constraintlayout:constraintlayout:1.1.3' implementation 'org.litepal.android:core:1.4.1' implementation 'com.squareup.okhttp3:okhttp:3.4.1' implementation 'com.google.code.gson:gson:2.7' implementation 'com.github.bumptech.glide:glide:3.7.0' testImplementation 'junit:junit:4.12' androidTestImplementation 'androidx.test:runner:1.2.0' androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0' }
debug到这里就动不了
