android獲得json數據并處理

android獲得json數據并處理：

//JsonActivity.java
package cn.outofmemory.android;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONStringer;
import android.app.Activity;
import android.os.Bundle;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class JsonActivity extends Activity {
    Button button,buttonClear;
    TextView textView;
    String page;
    String str="";

 String url = "http://192.168.1.118/androidjsontest/index.php";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    button = (Button) findViewById(R.id.btnFetch);
    buttonClear = (Button) findViewById(R.id.btnClear);
    textView = (TextView) findViewById(R.id.txtView);
    button.setOnClickListener(new Button.OnClickListener()
    {
        public void onClick(View v)
        {
            examineJSONFile();
        }
    });
    buttonClear.setOnClickListener(new Button.OnClickListener()
    {
        public void onClick(View v)
        {
            textView.setText("");
        }
    });

}

public String executeHttpGet(String URL) throws Exception 
{
    //This method  for HttpConnection  
    BufferedReader bufferedReader = null;
    try 
    {
        HttpClient client = new DefaultHttpClient();
        client.getParams().setParameter(CoreProtocolPNames.USER_AGENT, "android");
        HttpGet request = new HttpGet();
        request.setHeader("Content-Type", "text/plain; charset=utf-8");
        request.setURI(new URI(URL));
        HttpResponse response = client.execute(request);
        bufferedReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

        StringBuffer stringBuffer = new StringBuffer("");
        String line = "";

        String NL = System.getProperty("line.separator");
        while ((line = bufferedReader.readLine()) != null) 
        {
            stringBuffer.append(line + NL);
            System.out.print(stringBuffer);
        }
        bufferedReader.close();
        page = stringBuffer.toString();
        System.out.println(page+"page");
        return page;
    } 
    finally 
    {
        if (bufferedReader != null) 
        {
            try 
            {
                bufferedReader.close();
            } 
            catch (IOException e)    
            {
                Log.d("BBB", e.toString());
            }
        }
    }
}

void examineJSONFile()
{
    try
    {

        String Value="" ;
        String str = "";
        page = executeHttpGet(url);
        Log.i("hello", str.toString());

        JSONObject object=new JSONObject(page);
        str=str+object.names().toString();

        String sub1=str.substring(2, str.length()-2);
        String[] names=sub1.split("\",\"");

        for (int i=0;i<names.length;i++) {
            Value=Value+names[i] +":"+object.get(names[i])+"\n";
            System.out.println(names[i]);

        }

       /* String sub=str.substring(1, str.length()-1);
        String[] names=sub.split(",");
        String[] keyValue=new String[names.length];

        for (int i=0;i<names.length;i++) {
            names[i]=names[i].replace("\"","");
            Value=Value+names[i] +":"+object.get(names[i])+"\n";
            //keyValue[i]=names[i] +":"+object.get(names[i])+"\n";
            System.out.println(names[i]);

        }*/

        textView.setText(Value); 

        /*for(int i=0;i<keyValue.length;i++){
            textView.setText(keyValue[i]);
        }*/

        Log.i("hello", str.toString());

    }
    catch (Exception je)
    {
        textView.setText("Error w/file: " + je.getMessage());
    }
}


}</pre> 


 main.xml代碼： 

//==================
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:background="#acd654"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button android:text="Fetch_Data"
         android:id="@+id/btnFetch"
         android:layout_width="match_parent" 
         android:layout_height="wrap_content"></Button>
 <Button android:text="Clear_Screen"
         android:id="@+id/btnClear"
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content"></Button>
<TextView android:text="" 
          android:gravity="center"
          android:textColor="#000a44"
          android:id="@+id/txtView" 
          android:layout_width="fill_parent" 
          android:layout_height="fill_parent"/>
</LinearLayout>
 


 android menifest.xml 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android&quot;
      package="cn.outofmemory.android"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />


<application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:name=".JsonActivity"
              android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

</application>
<uses-permission android:name="android.permission.INTERNET"/>

</manifest></pre>