使用weather.com.cn数据实现的简易天气demo

通过网上搜索，找到了中国中央气象局的天气接口网址：http://m.weather.com.cn/data/101010100.html，其中数字部分为城市代码。从网上找到一个sqlite的数据库，存储了省市区的信息和城市代码，一共2556条数据，程序先将数据库copy到程序目录的file下，再读取。连网部分是使用AsyncHttpClient写的。

基本想法是做两个界面，一个界面用于显示从接口返回的数据，一个界面用于选择城市。为了简便，直接将json数据放在textview中显示，不再解析。

main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="jsj.lgl.weather.MainActivity" >

<Button
android:id="@+id/btn_setting"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="select area" />

<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@id/btn_setting" >

<TextView
android:id="@+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@id/btn_setting" />
</ScrollView>

</RelativeLayout>

MainActivity.java

package jsj.lgl.weather;

import java.io.UnsupportedEncodingException;

import org.apache.http.Header;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.FastjsonHttpResponseHandler;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {

TextView content;
Button btn_setting;
AsyncHttpClient httpClient;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
httpClient = new AsyncHttpClient();
content = (TextView) findViewById(R.id.content);
btn_setting = (Button) findViewById(R.id.btn_setting);
btn_setting.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, SelectAreaActivity.class);
startActivityForResult(intent, 100);
}
});

//getWeatherData("101010100");
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode == Activity.RESULT_OK) {
if(requestCode == 100) {
String code = data.getExtras().getString("code");
getWeatherData(code);
}
}
super.onActivityResult(requestCode, resultCode, data);
}

private void getWeatherData(String areaId) {
String url = "http://m.weather.com.cn/data/"+ areaId +".html";
content.setText("loading data");
httpClient.get(url, new AsyncHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers,
byte[] responseBody) {
super.onSuccess(statusCode, headers, responseBody);
String response = null;
try {
response = responseBody == null ? null : new String(responseBody, getCharset());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
content.setText(response);
}

@Override
public void onFailure(int statusCode, Header[] headers,
byte[] responseBody, Throwable error) {
super.onFailure(statusCode, headers, responseBody, error);
String error_text = "error!\nstatusCode=" + statusCode;
if(error != null) {
error_text += "\nerror_message:" + error.getMessage();
}
content.setText(error_text);
}
});
}
}

select_area.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center_horizontal">

<TextView
android:id="@+id/tv_province"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"
android:text="select province"
android:background="#f00"
/>

<TextView
android:id="@+id/tv_city"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"
android:layout_marginTop="20dp"
android:text="select city"
android:background="#f00"
/>

<TextView
android:id="@+id/tv_area"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"
android:layout_marginTop="20dp"
android:text="select area"
android:background="#f00"
/>
<Button
android:id="@+id/btn_ok"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="ok"
/>
</LinearLayout>

SelectAreaActivity.java

package jsj.lgl.weather;

import java.util.List;

import jsj.lgl.weather.model.Area;
import jsj.lgl.weather.model.City;
import jsj.lgl.weather.model.Province;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class SelectAreaActivity extends Activity {
TextView tv_province, tv_city, tv_area;
List<Province> listProvince;
List<City> listCity;
List<Area> listArea;
Dialog dialogProvince, dialogCity, dialogArea;
Button btn_ok;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.select_area);
tv_province = (TextView) findViewById(R.id.tv_province);
tv_city = (TextView) findViewById(R.id.tv_city);
tv_area = (TextView) findViewById(R.id.tv_area);
btn_ok = (Button) findViewById(R.id.btn_ok);
tv_province.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showProvinceDialog();
}
});
tv_city.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showCityDialog();
}
});
tv_area.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showAreaDialog();
}
});
btn_ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String code = (String) tv_area.getTag();
Log.i("code", "code=" + code);
setResult(Activity.RESULT_OK, new Intent().putExtra("code", code));
SelectAreaActivity.this.finish();
}
});
listProvince = DBUtil.getProvinceWithoutChild(this);
}

private void showProvinceDialog() {
if(dialogProvince == null) {
String[] provinces = new String[listProvince.size()];
for(int i=0,len=listProvince.size();i<len;i++) {
provinces[i] = listProvince.get(i).name;
}
dialogProvince = new AlertDialog.Builder(this)
.setTitle("选择省")
.setIcon(android.R.drawable.ic_dialog_info)
.setSingleChoiceItems(provinces, -1, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
String id = listProvince.get(which).id;
String name = listProvince.get(which).name;
tv_province.setText(name);
tv_province.setTag(id);
dialogProvince.dismiss();
listCity = DBUtil.getCityByProvinceId(SelectAreaActivity.this, id);
}
})
.create();
}
dialogProvince.show();
}

private void showCityDialog() {
if(listCity == null) {
return;
}
String[] citys = new String[listCity.size()];
for(int i=0,len=listCity.size();i<len;i++) {
citys[i] = listCity.get(i).name;
}
dialogCity = new AlertDialog.Builder(this)
.setTitle("选择城市")
.setIcon(android.R.drawable.ic_dialog_info)
.setSingleChoiceItems(citys, -1, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
String id = listCity.get(which).id;
String name = listCity.get(which).name;
tv_city.setText(name);
tv_city.setTag(id);
dialogCity.dismiss();
listArea = DBUtil.getAreaByCityId(SelectAreaActivity.this, id);
}
})
.create();
dialogCity.show();
}

private void showAreaDialog() {
if(listArea == null) {
return;
}
String[] areas = new String[listArea.size()];
for(int i=0,len=listArea.size();i<len;i++) {
areas[i] = listArea.get(i).name;
}
dialogArea = new AlertDialog.Builder(this)
.setTitle("选择地区")
.setIcon(android.R.drawable.ic_dialog_info)
.setSingleChoiceItems(areas, -1, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
String code = listArea.get(which).code;
String name = listArea.get(which).name;
tv_area.setText(name);
tv_area.setTag(code);
dialogArea.dismiss();
//listCity = DBUtil.getCityByProvinceId(SelectAreaActivity.this, id);
}
})
.create();
dialogArea.show();
}
}

程序非常简陋，仅为练手。项目下载地址：http://download.csdn.net/detail/lgl1170860350/7482453

程序运行部分截图：