安卓实现天气预报功能

此篇文章主要针对初学者，讲述了如何如何利用webservice访问天气预报接口获取网络数据，对返回结果的处理，以及如何利用Handler更新主线程UI。先看效果图：

接下来看主程序：

package com.example.getweather;import org.ksoap2.SoapEnvelope;import org.ksoap2.serialization.SoapObject;import org.ksoap2.serialization.SoapSerializationEnvelope;import org.ksoap2.transport.HttpTransportSE;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.annotation.SuppressLint;import android.app.Activity;import android.app.ProgressDialog;import android.graphics.Color;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.LinearLayout;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {		private EditText cityname;	private Button btn;	private TextView textView;    private final int duration=Toast.LENGTH_LONG;    private String theCityName;    private String result;    private ProgressDialog progressDialog;        @SuppressLint("HandlerLeak")	private Handler handler=new Handler(){		@Override		public void handleMessage(Message msg) {			progressDialog.dismiss();			switch (msg.what) {			case 1:						LinearLayout myLayout=(LinearLayout) findViewById(R.id.myLinearLayout);				PraseWeaTherUtil p=new PraseWeaTherUtil(result.substring(8, result.length()-2));				textView.setText("所在省/直辖市:"+p.getProvince());				myLayout.addView(getTextView("所在市:"+p.getCity()));				myLayout.addView(getTextView("时间:"+p.getTime()));				myLayout.addView(getTextView("温度:"+p.getNowDayTemperature()));				myLayout.addView(getTextView("今日天气:"+p.getNowDayWeaTher()));				myLayout.addView(getTextView("天气实况:"+p.getNowDayWeaTher_Detail()));				myLayout.addView(getTextView("风力:"+p.getWind_power()));				myLayout.addView(getTextView("明日天气:"+p.getWeaTher_Detail2()));				myLayout.addView(getTextView("温度:"+p.getTemperature2()));				myLayout.addView(getTextView("后天天气:"+p.getWeaTher_Detail3()));				myLayout.addView(getTextView("温度:"+p.getTemperature3()));				break;			case -1:				Toast.makeText(getApplicationContext(), "获取数据失败", duration).show();				break;			}		}    };    	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		textView=(TextView)findViewById(R.id.textview);		cityname=(EditText)findViewById(R.id.cityname);		btn=(Button)findViewById(R.id.btn);		btn.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View arg0) {				theCityName=cityname.getText().toString();				if(null==theCityName||"".equals(theCityName)){					Toast.makeText(getApplicationContext(), "请填写要查询的城市", duration).show();					return;				}				progressDialog=new ProgressDialog(MainActivity.this);				progressDialog.setMessage("正在获取天气数据...");				progressDialog.show();				new Thread(new GetWeatherTask(theCityName)).start();			}		});			}	private class GetWeatherTask implements Runnable{				String theCityName="";				public GetWeatherTask(String theCityName) {			super();			this.theCityName = theCityName;		}		@Override		public void run() {			try{				result=getRemoteInfo(theCityName);				handler.obtainMessage(1).sendToTarget();			}catch(Exception e){				e.printStackTrace();				handler.obtainMessage(-1).sendToTarget();			}		}			}		private TextView getTextView(String content){		TextView tv=new TextView(this);		tv.setTextSize(16);		tv.setTextColor(Color.parseColor("#000000"));		tv.setText(content);		return tv;	}		/**	 * 通过webservice获取城市天气	 * @param theCityName	 * @return	 */	public String getRemoteInfo(String theCityName) {		//http://WebXml.com.cn/getWeatherbyCityName		// 命名空间		String nameSpace = "http://WebXml.com.cn/";		// 调用的方法名称		String methodName = "getWeatherbyCityName";		// EndPoint通常是将WSDL地址末尾的"?WSDL"去除后剩余的部分		String endPoint = "http://webservice.webxml.com.cn/WebServices/WeatherWebService.asmx";		// SOAP Action通常为命名空间 + 调用的方法名称		String soapAction = "http://WebXml.com.cn/getWeatherbyCityName";		// 指定WebService的命名空间和调用的方法名		SoapObject rpc = new SoapObject(nameSpace, methodName);		// 设置需调用WebService接口需要传入的两个参数mobileCode、userId		rpc.addProperty("theCityName", theCityName);		// 生成调用WebService方法的SOAP请求信息,并指定SOAP的版本		SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER10);		envelope.bodyOut = rpc;		// 设置是否调用的是dotNet开发的WebService		envelope.dotNet = true;		// 等价于envelope.bodyOut = rpc;		envelope.setOutputSoapObject(rpc);		HttpTransportSE transport = new HttpTransportSE(endPoint);		try {			// 调用WebService			transport.call(soapAction, envelope);		} catch (Exception e) {			e.printStackTrace();		}		// 获取返回的数据		SoapObject object = (SoapObject) envelope.bodyIn;				return object.getProperty(0).toString();	}}

获取网络数据属于耗时操作，需要放在子线程进行，通过消息处理机制可以更新主线程UI，代码中我们看到有一个PraseWeaTherUtil类，这个是自己根据返回的天气数据格式写的一个解析类，此天气接口返回的数据形式如：anyType={string=xxx;string=xxx;}，它并不是json格式，所以需要自己写一个解析类，当然我这个解析类比较简单只是截取了一部分数据，大家也可以根据自己的需求，写一个自定义的解析类，下面截取部分代码：

public PraseWeaTherUtil(String result) {		super();		String results[]=result.replace("string=", "").split(";");		this.province=results[0];		this.city=results[1];		this.time=results[4];		this.nowDayTemperature=results[5];		this.nowDayWeaTher=results[6];		this.nowDayWeaTher_Detail=results[10];		this.WeaTher_Detail2=results[13];		this.temperature2=results[12];		this.WeaTher_Detail3=results[18];		this.temperature3=results[17];					}

详细解释已经在代码中写的很清楚，最后不要忘了写入访问网络权限，大家可以下载我的源码参考：

http://download.csdn.net/detail/baiyuliang2013/7091937

安卓实现天气预报效能

此篇文章主要针对初学者，讲述了如何如何利用webservice访问天气预报接口获取网络数据，对返回结果的处理，以及如何利用Handler更新主线程UI。先看效果图：