I have been trying to learn about lists and other things in android.. i have an app which shows the list of items from sd card..i want the code for which i can add the sort option to it..which will sort the list by name,date,type ans size. please help me out.. il display my code here..which shows the contents in list view.
package com.android.sam;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener ;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.Context;
import android.content.DialogInterface;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class SamActivity extends ListActivity {
private List<String> item = null;
private List<String> path = null;
private String root="/";
private TextView myPath;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myPath = (TextView)findViewById(R.id.path);
getDir(root);
}
private void getDir(String dirPath)
{
myPath.setText("Location: " + dirPath);
item = new ArrayList<String>();
path = new ArrayList<String>();
File f = new File(dirPath);
File[] files = f.listFiles();
if(!dirPath.equals(root))
{
item.add(root);
path.add(root);
item.add("../");
path.add(f.getParent());
}
for(int i=0; i < files.length; i++)
{
File file = files[i];
path.add(file.getPath());
if(file.isDirectory())
item.add(file.getName() + "/");
else
item.add(file.getName());
}
ArrayAdapter<String> fileList =
new ArrayAdapter<String>(this, R.layout.row, item);
setListAdapter(fileList);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
File file = new File(path.get(position));
if (file.isDirectory())
{
if(file.canRead())
getDir(path.get(position));
else
{
new AlertDialog.Builder(this)
.setIcon(R.drawable.ic_launcher)
.setTitle("[" + file.getName() + "] folder can't be read!")
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
}).show();
}
}
else
{
new AlertDialog.Builder(this)
.setIcon(R.drawable.alert)
.setTitle("[" + file.getName() + "] ")
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
}).show();
}
}
}
in my layout i have added an image button which should be showing the sort options and sort the list thankx in advance this is what i hav added ` sorting= (Button) findViewById(R.id.button2); final Context context1=this; sorting.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (v == findViewById(R.id.button2)) {
final CharSequence[] items = {"name", "date", "size", "type", "none"};
AlertDialog.Builder builder = new AlertDialog.Builder(context1);
builder.setTitle("Sort by");
builder.setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener () {
// Click listener
public void onClick(DialogInterface dialog, int item) {
Toast.makeText(getApplicationContext(), items[item], Toast.LENGTH_SHORT).show();
//If the Cheese item is chosen close the dialog box
if(items[item]=="none")
dialog.dismiss();
}
});
AlertDialog alert = builder.create();
//display dialog box
alert.show();
}
}
});
