Start activity using intent of ACTION_VIEW, for specified MIME type.

According to the detected MIME Type, we can start another activity with intent of ACTION_VIEW to view the file.

Java Code:

package com.AndroidListFiles;
 
import java.io.File;
import java.util.ArrayList;
import java.util.List;
 
import android.app.ListActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.webkit.MimeTypeMap;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
 
public class AndroidListFilesActivity extends ListActivity {
  
 private List fileList = new ArrayList();
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
         
        File root = new File(Environment
          .getExternalStorageDirectory()
          .getAbsolutePath());
        ListDir(root);
 
    }
     
    @Override
 protected void onListItemClick(ListView l, View v, int position, long id) {
  // TODO Auto-generated method stub
     File selected = new File(fileList.get(position));
     if(selected.isDirectory()){
      ListDir(selected);
     }else {
      Uri selectedUri = Uri.fromFile(selected);
      String fileExtension
       = MimeTypeMap.getFileExtensionFromUrl(selectedUri.toString());
      String mimeType
       = MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension);
       
      Toast.makeText(AndroidListFilesActivity.this,
        "FileExtension: " + fileExtension + "\n" +
        "MimeType: " + mimeType,
        Toast.LENGTH_LONG).show();
       
      //Start Activity to view the selected file
      Intent intent;
      intent = new Intent(Intent.ACTION_VIEW);
      intent.setDataAndType(selectedUri, mimeType);
      startActivity(intent);
 
     }
 }
 
 void ListDir(File f){
     File[] files = f.listFiles();
     fileList.clear();
     for (File file : files){
      fileList.add(file.getPath()); 
     }
      
     ArrayAdapter directoryList
     = new ArrayAdapter(this,
       android.R.layout.simple_list_item_1, fileList);
     setListAdapter(directoryList);
    }
 
}

Cheers Guys!!!!!!!!!!1