Android四大组件之Service(续2)

1.HttpRequest

package com.joyfulmath.android4example.http;



import java.io.BufferedReader;

import java.io.InputStreamReader;



import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;



import com.joyfulmath.android4example.R;



import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;



public class HttpDemoActivity extends Activity implements IResult {



    protected static final String TAG = "httpdemo.HttpDemoActivity";

    public Handler mMainHandler;

    public static final String RequestUrl = "http://www.baidu.com";

    Button mBtnRequest;

    TextView mResponseView;

    Button mbtn_json;

    /*

     * (non-Javadoc)

     * 

     * @see android.app.Activity#onCreate(android.os.Bundle)

     */

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.layout_httpdemo_main);

        mBtnRequest = (Button) this.findViewById(R.id.btn_request);

        mResponseView = (TextView) this.findViewById(R.id.httpdemo_text);

        mbtn_json = (Button) this.findViewById(R.id.btn_json);

        mBtnRequest.setOnClickListener(new OnClickListener() {



            @Override

            public void onClick(View v) {

                WorkThread work = new WorkThread(HttpDemoActivity.this,

                        RequestUrl);

                work.start();

            }

        });

        

        mbtn_json.setOnClickListener(new OnClickListener() {

            

            @Override

            public void onClick(View v) {

                

                JSonParser parser = new JSonParser();

                parser.parser();

            }

        });

        

        

        mMainHandler = new Handler() {



            /*

             * (non-Javadoc)

             * 

             * @see android.os.Handler#handleMessage(android.os.Message)

             */

            @Override

            public void handleMessage(Message msg) {

                String str = (String) msg.obj;

                Log.i(TAG, "get " + str);

                mResponseView.setText(str);

            }



        };

    }



    /*

     * (non-Javadoc)

     * 

     * @see android.app.Activity#onStart()

     */

    @Override

    protected void onStart() {

        super.onStart();

    }



    /*

     * (non-Javadoc)

     * 

     * @see android.app.Activity#onStop()

     */

    @Override

    protected void onStop() {

        super.onStop();

    }



    /*

     * (non-Javadoc)

     * 

     * @see android.app.Activity#onDestroy()

     */

    @Override

    protected void onDestroy() {

        super.onDestroy();

    }



    private class WorkThread extends Thread {



        IResult mListener;

        String address;

        String message = "";

        public WorkThread(IResult result, String address) {

            mListener = result;

            this.address = address;

        }



        /*

         * (non-Javadoc)

         * 

         * @see java.lang.Thread#run()

         */

        @Override

        public void run() {

            Log.i(TAG, "WorkThread start");

            try {

                HttpClient client = new DefaultHttpClient();

                HttpGet request = new HttpGet(address);

                HttpResponse response = client.execute(request);

                InputStreamReader inreader = new InputStreamReader(response

                        .getEntity().getContent());

                BufferedReader reader = new BufferedReader(inreader);

                String str = reader.readLine();

                Log.i(TAG, "WorkThread start str:"+str);

                while(str!=null)

                {

                    message+= str;

                    str = reader.readLine();

                }

                

                if(mListener!=null)

                {

                    mListener.onResult(message);

                }

                

            } catch (Exception ex) {

                Log.i(TAG, "WorkThread ex:"+ex.getMessage());

            }

        }



    }



    @Override

    public void onResult(String msg) {

        Message message = new Message();

        message.what = 1;

        message.obj = msg;

        mMainHandler.sendMessage(message);

    }

}

package com.joyfulmath.android4example.http;



public interface IResult {

    void onResult(String msg);

}

json格式解析：

package com.joyfulmath.android4example.http;



import org.json.JSONArray;

import org.json.JSONObject;

import org.json.JSONTokener;



import android.util.Log;



public class JSonParser {

    private static final String JSON =

            "{" +

            " \"phone\" : [\"12345678\", \"87654321\"]," +

            " \"name\" : \"yuanzhifei89\"," +

            " \"age\" : 100," +

            " \"address\" : { \"country\" : \"china\", \"province\" : \"jiangsu\" }," +

            " \"married\" : false" +

            "}";

    private static final String TAG = "httpdemo.JSonParser"; 

    

    public void parser()

    {

        Log.i(TAG, "[parser]");

        try{

            JSONTokener jsonparser = new JSONTokener(JSON);

            JSONObject person = (JSONObject) jsonparser.nextValue();

            JSONArray pbones = person.getJSONArray("phone");

            Log.i(TAG, "[parser]pbones:"+pbones.getString(0)+" "+pbones.getString(1));

            

            String name = person.getString("name");

            Log.i(TAG, "[parser]name:"+name);



        }catch(Exception ex)

        {

            Log.i(TAG, "[parser]ex:"+ex.getMessage());

        }

        

    }

}

xml解析：

三种：DOM，SAX，PULL

android 常用的xmlpullreader：

package com.joyfulmath.android4example.http;



import java.io.IOException;



import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;



import com.joyfulmath.android4example.R;



import android.content.res.Resources;

import android.content.res.XmlResourceParser;

import android.util.Log;



public class XmlParser {



    private static final String TAG = "httpdemo.XmlParser";



    // pull

    /*xmlpullparser 不关心xml的结构属性，它就是开始，结束，属性，value。

     * 

     * */

    public void pullXml(Resources res) {

        Log.i(TAG, "[pullXml]");

        XmlResourceParser parser = res.getXml(R.layout.layout_httpdemo_main);// xmlpullparser

        int eventType;

        try {

            eventType = parser.getEventType();

            while (eventType != XmlPullParser.END_DOCUMENT) {

                if (eventType == XmlPullParser.START_DOCUMENT) {

                    Log.i(TAG, "[pullXml] START_DOCUMENT");

                } else if (eventType == XmlPullParser.START_TAG) {

                    Log.i(TAG, "[pullXml] START_TAG:" + parser.getName());

                    int count = parser.getAttributeCount();

                    Log.i(TAG, "[pullXml] \t count" + count );

                    for (int i = 0; i < count; i++) {

                        String noteName = parser.getAttributeName(i);

                        Log.i(TAG, "[pullXml] \t noteName:" + noteName + " at " + i);

                        if(noteName.equals("id")||noteName.equals("text"))

                        {

                            String value = parser.getAttributeValue(i);

                            Log.i(TAG, "[pullXml]\t    noteValue:" + value + " at " + i);

                        }

                    }

                } else if (eventType == XmlPullParser.END_TAG) {

                    Log.i(TAG, "[pullXml] END_TAG:" + parser.getName());

                } else if (eventType == XmlPullParser.TEXT) {

                    Log.i(TAG, "[pullXml] TEXT:" + parser.getText());

                }



                eventType = parser.next();

            }



            Log.i(TAG, "[pullXml] END_DOCUMENT");

        } catch (XmlPullParserException | IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }



    }

}