Parse JSON with JSONObject

Android provide org.json.JSONObject class, to help parse JSON.

It's a simple example using JSONObject.



In order to make it simple, a string, dummy_json, in JSON format are defined inside res/values/strings.xml.

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, AndroidJSONActivity!</string>
    <string name="app_name">AndroidJSON</string>
    <string name="dummy_json">"{\"results\":{\"myblog\":\"android-er\", \"myurl\":"\""http://android-er.blogspot.com/\""}}"</string>
</resources>

layout, main.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:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<TextView  
    android:id="@+id/json_src"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
<TextView  
    android:id="@+id/json_object"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
<TextView  
    android:id="@+id/json_result"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
<TextView  
    android:id="@+id/json_myblog"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
<TextView  
    android:id="@+id/json_myurl"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
</LinearLayout>

package com.exercise.AndroidJSON;

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

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class AndroidJSONActivity extends Activity {
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        TextView JsonSrc = (TextView)findViewById(R.id.json_src);
        TextView JsonObject = (TextView)findViewById(R.id.json_object);
        TextView JsonResult = (TextView)findViewById(R.id.json_result);
        TextView JsonMyBlog = (TextView)findViewById(R.id.json_myblog);
        TextView JsonMyUrl = (TextView)findViewById(R.id.json_myurl);
        
        String json_source = getString(R.string.dummy_json);
        JsonSrc.setText(json_source);
        
        try {
   JSONObject jsonObject = new JSONObject(json_source);
   JSONObject results = jsonObject.getJSONObject("results");
   String myBlog = results.getString("myblog");
   String myUrl = results.getString("myurl");
   
   JsonObject.setText("\njsonObject:\n" + jsonObject.toString());
   JsonResult.setText("\nresults:\n" + results.toString());
         JsonMyBlog.setText("\nmyBlog:\n" + myBlog);
         JsonMyUrl.setText("\nmyUrl:\n" + myUrl);
   
  } catch (JSONException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   Toast.makeText(AndroidJSONActivity.this, 
     e.toString(), 
     Toast.LENGTH_LONG).show();
  }
    }
}

Download the files.



next:
- Get array elements in JSON