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 back_btn; 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; //被选中的省份 private Province selectedProvince; //被选中的城市 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); back_btn=(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(); } } }); back_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(currentLevel==LEVEL_COUNTY){ queryCities(); }else if (currentLevel==LEVEL_CITY){ queryProvinces(); } } }); queryProvinces(); } /** * 查询全国所有省,优先从数据库查询,如果没有查询到在从服务器查询 */ private void queryProvinces(){ titleText.setText("中国"); back_btn.setVisibility(View.GONE); //查询Province类中的所有数据 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"; Log.e("queryProvinces",address); queryFromServer(address,"province"); } } /** * 根据传入的地址和类型从服务器获取数据 * @param address * @param type */ 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) { getActivity().runOnUiThread(new Runnable() { @Override public void run() { closeProgressDialog(); Toast.makeText(getContext(), "加载失败", Toast.LENGTH_SHORT).show(); } }); } }); } private void closeProgressDialog() { if(progressDialog!=null){ progressDialog.dismiss(); } } private void showProgressDialog() { if(progressDialog==null){ progressDialog =new ProgressDialog(getActivity()); progressDialog.setMessage("正在加载中"); progressDialog.setCanceledOnTouchOutside(false); } progressDialog.show(); } /** * 查询所有县 */ private void queryCounties() { titleText.setText(selectedCity.getCityName()); back_btn.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_CITY; }else { int provinceCode = selectedProvince.getProvinceCode(); int cityCode = selectedCity.getCityCode(); String address = "http://guolin.tech/api/china/"+provinceCode+"/"+cityCode; queryFromServer(address,"county"); } } /** * 查询选中省内的所有的城市,优先查询数据库 */ private void queryCities() { titleText.setText(selectedProvince.getProvinceName()); back_btn.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()); } //用于刷新listView的界面 adapter.notifyDataSetChanged(); listView.setSelection(0); currentLevel=LEVEL_CITY; }else { int provinceCode = selectedProvince .getProvinceCode(); String address = "http://guolin.tech/api/china/"+provinceCode; queryFromServer(address,"city"); } }}-----------以上黑色部分 我经过调试 发现没有执行到这个ui线程里面的代码,导致程序一直卡在progressDialog中(如图)在调试中,json数据已经都加载进来了 偏偏runOnUiThread中的代码不会执行,菜鸟虚心求大神指点
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