我正在使用适用于 android 的 Google 天气 API 开发天气示例应用程序，到目前为止我已经开发了（您可以看到下图）
我有问题如何读取数据，如下面的红色矩形所示。现在我需要在源代码中进行哪些更改才能读取数据。
我的主要活动
package org.anddev.android.weatherforecast;
import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.anddev.android.weatherforecast.views.SingleWeatherInfoView;
import org.anddev.android.weatherforecast.weather.GoogleWeatherHandler;
import org.anddev.android.weatherforecast.weather.WeatherCurrentCondition;
import org.anddev.android.weatherforecast.weather.WeatherForecastCondition;
import org.anddev.android.weatherforecast.weather.WeatherSet;
import org.anddev.android.weatherforecast.weather.WeatherUtils;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
public class WeatherForecast extends Activity
{
private final String DEBUG_TAG = "WeatherForcaster";
private CheckBox chk_usecelsius = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.main);
this.chk_usecelsius = (CheckBox) findViewById(R.id.chk_usecelsius);
Button cmd_submit = (Button) findViewById(R.id.cmd_submit);
cmd_submit.setOnClickListener(new OnClickListener()
{
public void onClick(View arg0)
{
URL url;
try {
/* Get what user typed to the EditText. */
String cityParamString = ((EditText) findViewById(R.id.edit_input)).getText().toString();
String queryString = "http://www.google.com/ig/api?weather=Peshawar, Khyber Pakhtunkhwa"; //Lincoln,Nebraska
/* Replace blanks with HTML-Equivalent. */
url = new URL(queryString.replace(" ", "%20"));
/* Get a SAXParser from the SAXPArserFactory. */
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
/* Get the XMLReader of the SAXParser we created. */
XMLReader xr = sp.getXMLReader();
/*
* Create a new ContentHandler and apply it to the
* XML-Reader
*/
GoogleWeatherHandler gwh = new GoogleWeatherHandler();
xr.setContentHandler(gwh);
/* Parse the xml-data our URL-call returned. */
xr.parse(new InputSource(url.openStream()));
/* Our Handler now provides the parsed weather-data to us. */
WeatherSet ws = gwh.getWeatherSet();
/* Update the SingleWeatherInfoView with the parsed data. */
updateWeatherInfoView(R.id.weather_today, ws.getWeatherCurrentCondition());
updateWeatherInfoView(R.id.weather_1, ws.getWeatherForecastConditions().get(0));
updateWeatherInfoView(R.id.weather_2, ws.getWeatherForecastConditions().get(1));
updateWeatherInfoView(R.id.weather_3, ws.getWeatherForecastConditions().get(2));
updateWeatherInfoView(R.id.weather_4, ws.getWeatherForecastConditions().get(3));
}
catch (Exception e)
{
resetWeatherInfoViews();
Log.e(DEBUG_TAG, "WeatherQueryError", e);
}
}
});
}
private void updateWeatherInfoView(int aResourceID,WeatherForecastCondition aWFIS)
throws MalformedURLException
{
/* Construct the Image-URL. */
URL imgURL = new URL("http://www.google.com" + aWFIS.getIconURL());
((SingleWeatherInfoView) findViewById(aResourceID)).setRemoteImage(imgURL);
int tempMin = aWFIS.getTempMinCelsius();
int tempMax = aWFIS.getTempMaxCelsius();
/* Convert from Celsius to Fahrenheit if necessary. */
if (this.chk_usecelsius.isChecked())
{
((SingleWeatherInfoView) findViewById(aResourceID)).setTempCelciusMinMax(tempMin, tempMax);
}
else
{
tempMin = WeatherUtils.celsiusToFahrenheit(tempMin);
tempMax = WeatherUtils.celsiusToFahrenheit(tempMax);
((SingleWeatherInfoView) findViewById(aResourceID)).setTempFahrenheitMinMax(tempMin, tempMax);
}
}
private void updateWeatherInfoView(int aResourceID,
WeatherCurrentCondition aWCIS) throws MalformedURLException
{
/* Construct the Image-URL. */
URL imgURL = new URL("http://www.google.com" + aWCIS.getIconURL());
((SingleWeatherInfoView) findViewById(aResourceID)).setRemoteImage(imgURL);
/* Convert from Celsius to Fahrenheit if necessary. */
if (this.chk_usecelsius.isChecked())
{
((SingleWeatherInfoView) findViewById(aResourceID)).setTempCelcius(aWCIS.getTempCelcius());
}
else
{
((SingleWeatherInfoView) findViewById(aResourceID)).setTempFahrenheit(aWCIS.getTempFahrenheit());
}
}
private void resetWeatherInfoViews()
{
((SingleWeatherInfoView)findViewById(R.id.weather_today)).reset();
((SingleWeatherInfoView)findViewById(R.id.weather_1)).reset();
((SingleWeatherInfoView)findViewById(R.id.weather_2)).reset();
((SingleWeatherInfoView)findViewById(R.id.weather_3)).reset();
((SingleWeatherInfoView)findViewById(R.id.weather_4)).reset();
}
}
天气信息查看活动
package org.anddev.android.weatherforecast.views;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.Map;
import org.anddev.android.weatherforecast.R;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
/**
* The View capable of showing a WeatehrIcon + a Temperature-TextView.
*/
public class SingleWeatherInfoView extends LinearLayout {
// ===========================================================
// Fields
// ===========================================================
private ImageView myWeatherImageView = null;
private TextView myTempTextView = null;
// ===========================================================
// Constructors
// ===========================================================
public SingleWeatherInfoView(Context context)
{
super(context);
}
public SingleWeatherInfoView(Context context, AttributeSet attrs) //,Map inflateParams
{
super(context,attrs);
/* Setup the ImageView that will show weather-icon. */
this.myWeatherImageView = new ImageView(context);
this.myWeatherImageView.setImageDrawable(getResources().getDrawable(R.drawable.dunno));
/* Setup the textView that will show the temperature. */
this.myTempTextView = new TextView(context);
this.myTempTextView.setText("? °C");
this.myTempTextView.setTextSize(16);
this.myTempTextView.setTypeface(Typeface.create("Tahoma", Typeface.BOLD));
/* Add child views to this object. */
this.addView(this.myWeatherImageView, new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
this.addView(this.myTempTextView, new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
}
// ===========================================================
// Getter & Setter
// ===========================================================
public void reset()
{
this.myWeatherImageView.setImageDrawable(getResources().getDrawable(R.drawable.dunno));
this.myTempTextView.setText("? °C");
}
/** Sets the Child-ImageView of this to the URL passed. */
public void setRemoteImage(URL aURL)
{
try
{
URLConnection conn = aURL.openConnection();
conn.connect();
InputStream is = conn.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
Bitmap bm = BitmapFactory.decodeStream(bis);
bis.close();
is.close();
this.myWeatherImageView.setImageBitmap(bm);
}
catch (IOException e)
{
/* Reset to 'Dunno' on any error. */
this.myWeatherImageView.setImageDrawable(getResources().getDrawable(R.drawable.dunno));
}
}
public void setTempCelcius(int aTemp)
{
this.myTempTextView.setText("" + aTemp + " °C");
}
public void setTempFahrenheit(int aTemp)
{
this.myTempTextView.setText("" + aTemp + " °F");
}
public void setTempFahrenheitMinMax(int aMinTemp, int aMaxTemp)
{
this.myTempTextView.setText("" + aMinTemp + "/" + aMaxTemp + " °F");
}
public void setTempCelciusMinMax(int aMinTemp, int aMaxTemp)
{
this.myTempTextView.setText("" + aMinTemp + "/" + aMaxTemp + " °C");
}
public void setTempString(String aTempString)
{
this.myTempTextView.setText(aTempString);
}
}