hzuapps#135 hzuapps#1 hzuapps#88 hzuapps#89 hzuapps#90 hzuapps#95 lab…

…01 lab02 lab03 lab04 lab09

app/src/main/java/edu/hzuapps/androidworks/homeworks/net1314080903229/ChooseAreaActivity.java

@@ -0,0 +1,260 @@
+package com.perkin.weather.activity;
+
+import android.app.Activity;
+import android.app.ProgressDialog;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.text.TextUtils;
+import android.view.View;
+import android.view.Window;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.perkin.weather.R;
+import com.perkin.weather.model.City;
+import com.perkin.weather.model.County;
+import com.perkin.weather.model.Province;
+import com.perkin.weather.service.WeatherDB;
+import com.perkin.weather.util.HttpCallbackListener;
+import com.perkin.weather.util.HttpUtil;
+import com.perkin.weather.util.Utility;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by perkin on 2016/6/13.
+ */
+public class ChooseAreaActivity extends Activity {
+    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 ListView listView;
+    private ArrayAdapter<String> adapter;
+    private WeatherDB weatherDB;
+    private List<String> dataList = new ArrayList<String>();
+    /**
+     * 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;
+
+    /**
+     *是否从WeatherActivity中跳转过来
+     */
+    private boolean isFromWeatherActivity;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        isFromWeatherActivity = getIntent().getBooleanExtra("from_weather_activity",false);
+        //创建用于共享数据的SharedPreference进行传递到下一个Activity
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
+        //已经选择了城市而且不是从WeatherActivity跳转过来，才会直接跳转到WeatherActivity
+        if(prefs.getBoolean("city_selected",false)&&!isFromWeatherActivity){
+            Intent intent = new Intent(this,WeatherActivity.class);
+            startActivity(intent);
+            finish();
+            return;
+        }
+        requestWindowFeature(Window.FEATURE_NO_TITLE);
+        setContentView(R.layout.choose_area);
+        listView = (ListView)findViewById(R.id.list_view);
+        titleText = (TextView)findViewById(R.id.title_text);
+        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,dataList);
+        listView.setAdapter(adapter);
+        weatherDB =WeatherDB.getInstance(this);
+        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> arg0, View view, int index, long arg3) {
+                if(currentLevel==LEVEL_PROVINCE){
+                    selectedProvince = provinceList.get(index);
+                    queryCities();
+                }
+                else if(currentLevel==LEVEL_CITY){
+                    selectedCity = cityList.get(index);
+                    queryCounties();
+                }
+                //接下来是选定了某个县以后的步骤
+                else if(currentLevel==LEVEL_COUNTY){
+                    String countyCode = countyList.get(index).getCountyCode();
+                    String countyName = countyList.get(index).getCountyName();
+                    Intent intent = new Intent(ChooseAreaActivity.this,WeatherActivity.class);
+                    intent.putExtra("county_code",countyCode);      //利用putExtra()方法进行添加要向下一个Activity传递的对象
+                    intent.putExtra("county_name",countyName);
+                    startActivity(intent);
+                    finish();
+                }
+
+            }
+        });
+        queryProvinces();   //加载省级数据
+    }
+    /**
+     * 查询所有的省份，优先从数据库查询，如果美欧查询到再去服务器上查询，。
+     */
+    private void queryProvinces(){
+        provinceList = weatherDB.loadProvince();
+        if(provinceList.size()>0){
+            dataList.clear();
+            for(Province province:provinceList){
+                dataList.add(province.getProvinceName());
+            }
+            adapter.notifyDataSetChanged();
+            listView.setSelection(0);
+            titleText.setText("中国");
+            currentLevel = LEVEL_PROVINCE;
+        }
+        else{
+            queryFromServer(null,"province");
+        }
+    }
+    /**
+     * 查询选中的省内所有的市，优先从数据库中查询，如果没有查询到再去服务器上查询。
+     */
+    private void queryCities(){
+        cityList = weatherDB.loadCities(selectedProvince.getId());
+        if(cityList.size()>0){
+            dataList.clear();
+            for(City city:cityList){
+                dataList.add(city.getCityName());
+            }
+            adapter.notifyDataSetChanged();
+            listView.setSelection(0);
+            titleText.setText(selectedProvince.getProvinceName());
+            currentLevel=LEVEL_CITY;
+        }
+        else{
+            queryFromServer(selectedProvince.getProvinceCode(),"city");
+        }
+    }
+    /**
+     * 查询选中市内所有的县，优先从数据库中查询，如果没有查询到再去服务器上查询
+     */
+    private void queryCounties(){
+        countyList = weatherDB.loadCounties(selectedCity.getId());
+        if(countyList.size()>0){
+            dataList.clear();
+            for(County county:countyList){
+                dataList.add(county.getCountyName());
+            }
+            adapter.notifyDataSetChanged();
+            listView.setSelection(0);
+            titleText.setText(selectedCity.getCityName());
+            currentLevel = LEVEL_COUNTY;
+        }else{
+            queryFromServer(selectedCity.getCityCode(),"county");
+        }
+    }
+    /**
+     * 根据传入的代码和类型从服务器上查询省市县数据
+     */
+    private void queryFromServer(final String code,final String type){
+        String address;
+        if(!TextUtils.isEmpty(code)){
+            address = "http://www.weather.com.cn/data/list3/city"+code+".xml";
+        }else{
+            address ="http://www.weather.com.cn/data/list3/city.xml";
+        }
+        showProgressDialog();
+        HttpUtil.sendHttpRequest(address, new HttpCallbackListener() {
+            @Override
+            public void onFinish(String response) {
+                boolean result = false;
+                if ("province".equals(type)) {
+                    result = Utility.handleProvinceResponse(weatherDB, response);
+                } else if ("city".equals(type)) {
+                    result = Utility.handleCitiesResponse(weatherDB, response, selectedProvince.getId());
+                } else if ("county".equals(type)) {
+                    result = Utility.handleCountiesResponse(weatherDB, response, selectedCity.getId());
+                }
+                if (result) {
+                    //通过runOnUiThread()方法回到主线程处理逻辑
+                    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 onError(Exception e) {
+                //通过runOnUiThread()方法回到线程处理逻辑
+                runOnUiThread(new Runnable() {
+                    @Override
+                    public void run() {
+                        closeProgressDialog();
+                        Toast.makeText(ChooseAreaActivity.this, "加载", Toast.LENGTH_SHORT).show();
+                    }
+                });
+            }
+        });
+    }
+    /**
+     * 显示进度对话框
+     */
+    private void showProgressDialog(){
+        if(progressDialog==null){
+            progressDialog=new ProgressDialog(this);
+            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();
+        }
+    }
+    /**
+     * 捕获Back按键，根据当前的级别来判断，此时应该返回市列表，省列表，还是直接退出。
+     */
+    @Override
+    public void onBackPressed() {
+        if(currentLevel==LEVEL_COUNTY){
+            queryCities();
+        }else if(currentLevel==LEVEL_CITY){
+            queryProvinces();
+        }else{
+            finish();
+        }
+    }
+}

app/src/main/java/edu/hzuapps/androidworks/homeworks/net1314080903229/City.java

@@ -0,0 +1,43 @@
+package com.perkin.weather.model;
+
+/**
+ * Created by perkin on 2016/6/13.
+ */
+public class City {
+    private int id;
+    private String cityName;
+    private String cityCode;
+    private int provinceId;
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getCityName() {
+        return cityName;
+    }
+
+    public void setCityName(String cityName) {
+        this.cityName = cityName;
+    }
+
+    public String getCityCode() {
+        return cityCode;
+    }
+
+    public void setCityCode(String cityCode) {
+        this.cityCode = cityCode;
+    }
+
+    public int getProvinceId() {
+        return provinceId;
+    }
+
+    public void setProvinceId(int provinceId) {
+        this.provinceId = provinceId;
+    }
+}

app/src/main/java/edu/hzuapps/androidworks/homeworks/net1314080903229/County.java

@@ -0,0 +1,43 @@
+package com.perkin.weather.model;
+
+/**
+ * Created by perkin on 2016/6/13.
+ */
+public class County {
+    private int id;
+    private String countyName;
+    private String countyCode;
+    private int cityId;
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getCountyName() {
+        return countyName;
+    }
+
+    public void setCountyName(String countyName) {
+        this.countyName = countyName;
+    }
+
+    public String getCountyCode() {
+        return countyCode;
+    }
+
+    public void setCountyCode(String countyCode) {
+        this.countyCode = countyCode;
+    }
+
+    public int getCityId() {
+        return cityId;
+    }
+
+    public void setCityId(int cityId) {
+        this.cityId = cityId;
+    }
+}

app/src/main/java/edu/hzuapps/androidworks/homeworks/net1314080903229/HttpCallbackListener.java

@@ -0,0 +1,9 @@
+package com.perkin.weather.util;
+
+/**
+ * Created by perkin on 2016/6/13.
+ */
+public interface HttpCallbackListener {
+    void onFinish(String response);
+    void onError(Exception e);
+}