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POIs there any way to pass a DOM Object via an Intent and Parcelable?
 

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  1. POIs there any way to pass a DOM Object via an Intent and Parcelable?
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    <p>Is there any way to pass a JAXP Node or Document via an Intent and Parcelable? JAXP doesn't implement Parcelable, so the answer is probably --no. Is there any DOM library that implements Parcelable? Can someone provide a working example of that?</p> <p>Serialization isn't an option; nasty performance hit. Storing the data in res/xml is not an option: it must eventually (by end of project) be encrypted on disk. Android's "compiled" XML Access Tools do not support decrypting the whole XML. Of course I can do it myself with a class.</p> <p>Here's my starter code that inflates the XML. My goal is to pass a Node or Document from one ListView to another, effectively drilling down the DOM via Lists.</p> <p>My Document contains information that all activities need to share. Each activity accesses different Nodes, and extracts new information. I've considered exposing the Document via a global, but I don't think it will be safe for multiple Activities to access it that way.</p> <p>Also, in the working code below I intend to pass a Node to the second ListActivity rather than a String, just haven't gotten that far.</p> <pre><code>package com.example import java.io.File; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import android.app.ListActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.*; import android.widget.AdapterView.OnItemClickListener; public class JAXPListActivity extends ListActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Document doc = null; try { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); doc = builder.parse(new File("/sdcard/example.xml")); } catch (Exception e) { e.printStackTrace(); //TO-DO: exception handling } NodeList nodes = doc.getChildNodes(); String[] nodeList = new String[nodes.getLength()]; for(int i = 0; i&lt;nodes.getLength(); i++) { Node node = nodes.item(i); nodeList[i] = nodes.item(i).getNodeName(); } this.setListAdapter(new ArrayAdapter&lt;String&gt;(this, R.layout.list_item, R.id.label, nodeList)); ListView lv = getListView(); lv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { String nodeName = ((TextView) view).getText().toString(); Intent i = new Intent(getApplicationContext(), JAXPNodeListActivity.class); i.putExtra("nodeName", nodeName); startActivity(i); } }); } } </code></pre>
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    1. COOkay, apparently passing data via Intents is frowned upon, and clearly there are no putExtra() methods for Object. I'm still wondering if anybody has repackaged the DOM objects with Parcelable implementations. Maybe I'll give it a shot.
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    2. COyou can try to use : getIntent().getSerializableExtra(nodeName)
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    3. COThe solution can't use serialization: it's one of the stated requirements.
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