android解析json（2）

两种android解析json的例子
第一个事件是android直接解析json字符串
第二个事件是将json写在文件中，并放在raw目录下 进行解析
工程项目结构在最后附件，双击图片查看原图

完整代码如下：


json形式为：

{   
"firstname":"Richard",   
"lastname":"Stearns",   
"almamater":"Cornell University",   
"occupation":"President, World Vision",   
"interview":   
    {   
        "source" : "http://blog.guykawasaki.com/2007/05/ten_or_so_quest.html#ixzz0giEIX0zY",   
        "questions":   
            [   
            {   
            "Question": "How much money does World Vision raise every year?",   
            "Answer": "Worldwide, World Vision raises about $2 billion annually; the U.S. office, which I head up, raises about half of the total."   
            },   
            {   
            "Question": "Is this the 80/20 rule where twenty percent of the people send in eighty percent of the money or are donations more spread out?",   
            "Answer": "World Vision's strength is that we are supported by hundreds of thousands of faithful people who give us about a dollar a day by sponsoring children. Our \"major donors\" account for less than five percent of our total income. Also, for a non-profit, we have quite a diversified portfolio of revenue. Just over forty percent is cash from private citizens; thirty percent is government grants in food and cash; and about thirty percent are products donated from corporation--what we call \"gifts-in-kind.\""   
            }   
            ]   
    }   
}   

实现代码：

import java.io.InputStream;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.R.integer;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class JsonAndroidActivity extends Activity implements OnClickListener{
	private Button jsonbutton,jsonbutton2;
	private JSONObject obj;
	private String staticObject = "{\"firstname\":\"Steve\",\"lastname\":\"Jobs\",\"cellphones\":\"0\"}";   
	
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        jsonbutton = (Button)findViewById(R.id.jsonbutton);
        jsonbutton2 = (Button)findViewById(R.id.jsonbutton2);
        jsonbutton.setOnClickListener(this);
        jsonbutton2.setOnClickListener(this);
    }
    
    @Override
    public void onClick(View v) {
    	switch(v.getId()){
    		case R.id.jsonbutton:{
	    		try {
	    			obj = new JSONObject(staticObject);
	    			String x = obj.get("firstname").toString() + "" + obj.get("lastname").toString() + "has" + obj.getInt("cellphones")+ "Android phones";
	    			setStatus(x);
	    		} catch (JSONException e) {
	    			setStatus("Error occured " + e.getMessage());
	    		}
    		}
    		
    		case R.id.jsonbutton2:{
    			try {
					String x = null;
					InputStream is = this.getResources().openRawResource(R.raw.interview);
					byte [] buffer = new byte[is.available()];
					while(is.read(buffer)!= -1){
						String json = new String(buffer);
						obj = new JSONObject(json);
						x = obj.getString("firstname")+""+obj.getString("lastname")+"n";
						x += obj.getString("occupation") + "n";
						
						JSONObject interview = obj.getJSONObject("interview");
						x += "Interview source:" + interview.getString("source") + "n";
						
						JSONArray questions = interview.getJSONArray("questions");
						x += "Number of questions:" +questions.length() + "nn";
						
						int i;
						for(i=0; i<questions.length(); i++){
							JSONObject qa = questions.getJSONObject(i);
							x+= "-------n";
							x += "Q" + (i+1) + ". " + qa.getString("Question") + "nn";   
					        x += "A" + (i+1) + ". " + qa.getString("Answer") + "n";   
						}
						setStatus(x);
					}
				} catch (Exception e) {
					setStatus("Error w/file: " + e.getMessage());   

				}
    		}
    	}
    	
    }
    
    void setStatus(String x){
    	TextView tv = (TextView)findViewById(R.id.jsontextView);
    	tv.setText(x);
    }
}

layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <TextView android:text="TextView" 
    		  android:id="@+id/jsontextView" 
    		  android:layout_width="wrap_content"
    		  android:layout_height="wrap_content"/>

	<Button android:text="json" 
			android:id="@+id/jsonbutton" 
			android:layout_width="wrap_content" 
			android:layout_height="wrap_content"/>
	
	<Button android:text="json2" 
			android:id="@+id/jsonbutton2" 
			android:layout_width="wrap_content" 
			android:layout_height="wrap_content"/>
</LinearLayout>

评论

1 楼 weisi2375 2012-04-26  

还不错