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public class CheckboxListActivity extends ListActivity {
 
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
 
		setContentView(R.layout.activity_checkbox);
 
		CheckboxListAdapter adapter = new CheckboxListAdapter(
				getLayoutInflater());
 
		getListView().setAdapter(adapter);
	}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
 
    <ListView
        android:id="@android:id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </ListView>
 
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:padding="5dp" >
 
    <TextView
        android:id="@+id/textView1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1" />
 
    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/selected" />
 
</LinearLayout>

public class SampleData {
 
	private String name;
 
	private boolean selected;
 
	public SampleData(String name, boolean selected) {
		super();
		this.name = name;
		this.selected = selected;
	}
 
	public String getName() {
		return name;
	}
 
	public void setName(String name) {
		this.name = name;
	}
 
	public boolean isSelected() {
		return selected;
	}
 
	public void setSelected(boolean selected) {
		this.selected = selected;
	}
 
}

public class CheckboxListAdapter extends BaseAdapter implements OnClickListener {
 
	/** The inflator used to inflate the XML layout */
	private LayoutInflater inflator;
 
	/** A list containing some sample data to show. */
	private List dataList;
 
	public CheckboxListAdapter(LayoutInflater inflator) {
		super();
		this.inflator = inflator;
 
		dataList = new ArrayList();
 
		dataList.add(new SampleData("Peter", false));
		dataList.add(new SampleData("Bob", false));
		dataList.add(new SampleData("Sara", true));
		dataList.add(new SampleData("Mitch", false));
		dataList.add(new SampleData("Tracy", false));
		dataList.add(new SampleData("Joe", false));
		dataList.add(new SampleData("George", false));
		dataList.add(new SampleData("Nancy", false));
		dataList.add(new SampleData("Susi", true));
		dataList.add(new SampleData("Homer", false));
		dataList.add(new SampleData("Lisa", false));
		dataList.add(new SampleData("Jack", false));
	}
 
	@Override
	public int getCount() {
		return dataList.size();
	}
 
	@Override
	public Object getItem(int position) {
		return dataList.get(position);
	}
 
	@Override
	public long getItemId(int position) {
		return position;
	}
 
	@Override
	public View getView(int position, View view, ViewGroup viewGroup) {
 
		// We only create the view if its needed
		if (view == null) {
			view = inflator.inflate(R.layout.element_example, null);
 
			// Set the click listener for the checkbox
			view.findViewById(R.id.checkBox1).setOnClickListener(this);
		}
 
		SampleData data = (SampleData) getItem(position);
 
		// Set the example text and the state of the checkbox
		CheckBox cb = (CheckBox) view.findViewById(R.id.checkBox1);
		cb.setChecked(data.isSelected());
		// We tag the data object to retrieve it on the click listener.
		cb.setTag(data);
 
		TextView tv = (TextView) view.findViewById(R.id.textView1);
		tv.setText(data.getName());
 
		return view;
	}
 
	@Override
	/** Will be called when a checkbox has been clicked. */
	public void onClick(View view) {
		SampleData data = (SampleData) view.getTag();
		data.setSelected(((CheckBox) view).isChecked());
	}

public class AutocloseDialog extends DialogFragment {
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		View view = inflater.inflate(R.layout.autoclose, container);
		getDialog().setTitle("Hello");
 
		return view;
	}
 
	@Override
	public void show(FragmentManager manager, String tag) {
		Log.i("sample_autoclosedialog", "showing dialog");
		new CloseThread(this).start();
		super.show(manager, tag);
	}
 
	@Override
	public int show(FragmentTransaction transaction, String tag) {
		Log.i("sample_autoclosedialog", "showing dialog");
		new CloseThread(this).start();
		return super.show(transaction, tag);
	}
 
	class CloseThread extends Thread {
 
		private AutocloseDialog dialog;
 
		public CloseThread(AutocloseDialog dialog) {
			super();
			this.dialog = dialog;
		}
 
		@Override
		public void run() {
			try {
				sleep(3000);
				dialog.dismiss();
				Log.i("sample_autoclosedialog", "dialog dismissed");
			} catch (InterruptedException e) {
				Log.e("sample_autoclosedialog", "exception", e);
			}
		}
 
	}
}

 
package com.example;
 
import java.io.InputStream;
import java.lang.ref.WeakReference;
 
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.ImageView;
 
/**
 * AsyncTask to download an image from an URL and attach it to an ImageView.
 * 
 * @author Gerrit Schimpf
 * 
 */
public class ImageDownloadTask extends AsyncTask<String, Void, Bitmap> {
 
	/** The url from where to download the image. */
	private String url;
 
	/** Reference to the view which should receive the image */
	private final WeakReference<ImageView> imageRef;
 
	/**
	 * Constructor.
	 * 
	 * @param imageView
	 *            The ImageView which will receive the image.
	 */
	public ImageDownloadTask(ImageView imageView) {
		imageRef = new WeakReference<ImageView>(imageView);
	}
 
	/**
	 * This function will be executed to download the image in a background
	 * process.
	 * 
	 */
	@Override
	protected Bitmap doInBackground(String... params) {
		try {
			InputStream in = new java.net.URL(url).openStream();
			Bitmap bitmap = BitmapFactory.decodeStream(in);
			return bitmap;
		} catch (Exception e) {
			Log.e("ImageDownload", e.getMessage());
		}
		return null;
	}
 
	/**
	 * This function will be called after the image download and attaches
	 * the bitmap to the ImageView.
	 * 
	 */
	@Override
	protected void onPostExecute(Bitmap bitmap) {
		if (isCancelled()) {
			bitmap = null;
		}
 
		if (imageRef != null) {
			ImageView imageView = imageRef.get();
			if (imageView != null) {
				imageView.setImageBitmap(bitmap);
			}
		}
	}
 
}