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    <p>Try this code</p> <pre><code>package com.android.test.CacheDemo; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.net.URL; import java.net.URLConnection; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class CachingDemoActivity extends Activity implements OnClickListener{ private static String URL="http://bhaskar1.cntdy.mobi/punjabkesari/appdetails/sectiondetails.json"; private static String FILE_NAME = "CachedResponse"; private Button startAPICallButton; private Button retrieveFromCacheButton; /* view lifecycle methods*/ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); this.initializeComponents(); } /*overriden methods*/ public void onClick(View clickedView) { if(clickedView == this.startAPICallButton) { Toast.makeText(this, "Making the API call... Please wait", Toast.LENGTH_LONG).show(); this.makeAPICall(); } else if(clickedView == this.retrieveFromCacheButton) { Toast.makeText(this, "Retrieving data from the fuckin cache!!!", Toast.LENGTH_LONG).show(); this.retrieveStuffFromCache(); } } /* private methods*/ private void initializeComponents() { this.startAPICallButton = (Button) this.findViewById(R.id.start_api_call_button); this.startAPICallButton.setOnClickListener(this); this.retrieveFromCacheButton = (Button) this.findViewById(R.id.retrieve_cache_button); this.retrieveFromCacheButton.setOnClickListener(this); } private void makeAPICall() { new Thread(new Runnable() { @Override public void run() { try { //download the json onto the device. URL url = new URL(CachingDemoActivity.URL); URLConnection connection = url.openConnection(); //read the data and store it in a byte array first. //dont use this code for big json file //as long as its a json and not very long, this will work just fine!!! InputStream inStream = connection.getInputStream(); ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream(); int readByte = 0; //read the bytes one-by-one from the inputstream to the buffer. while(true) { readByte = inStream.read(); if(readByte == -1) { break; } byteOutStream.write(readByte); } byteOutStream.flush(); inStream.close(); byteOutStream.close(); byte[] response = byteOutStream.toByteArray(); //now response byte array is the complete json in the biary form. We will save this stuff to file. File cacheDir = CachingDemoActivity.this.getCacheDir(); File jsonFile = new File(cacheDir, FILE_NAME); FileOutputStream outStream = new FileOutputStream(jsonFile); //write the whole data into the file for(int i = 0; i &lt; response.length; i++) { outStream.write(response[i]); } android.util.Log.e("status - ","API call is complete!!"); //this should do the trick of saving all the stuff in the file with file name CachedResponse!! //let see if we can retrieve the stuff!!! } catch (Exception e) { e.printStackTrace(); } } }).start(); } private void retrieveStuffFromCache() { new Thread(new Runnable() { @Override public void run() { try { File jsonFile = new File(CachingDemoActivity.this.getCacheDir(), FILE_NAME); FileInputStream fInStream = new FileInputStream(jsonFile); ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream(); int readByte = 0; while(true) { readByte = fInStream.read(); if(readByte == -1) { break; } byteOutStream.write(readByte); } fInStream.close(); byteOutStream.flush(); byteOutStream.close(); byte[] retrievedStringData = byteOutStream.toByteArray(); String originalJson = new String(retrievedStringData); android.util.Log.e("json - ", originalJson); } catch(Exception ex) { ex.printStackTrace(); } } }).start(); } } </code></pre>
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    1. POsaving a json file to internal memory
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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