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    <pre><code>public final class DownloadThread extends Thread { private static final String TAG = DownloadThread.class.getSimpleName(); private Handler handler; private int totalQueued; private int totalCompleted; private final DownloadThreadListener listener; private boolean isRunning = false; protected boolean isStop; private TaskInitiator mtaskInitiator = null; /** * @return the isRunning */ public boolean isRunning() { return isRunning; } public DownloadThread(DownloadThreadListener listener) { this.listener = listener; isStop = false; } @Override public void run() { try { Looper.prepare(); mtaskInitiator = new TaskInitiator(); handler = new Handler(); isRunning = true; Looper.loop(); } catch (Throwable t) { Log.e(TAG, "DownloadThread halted due to an error", t); } } public synchronized void requestStop() { isStop = true; } public synchronized void enqueueDownload(DownloadTask task) { mtaskInitiator = new TaskInitiator(); mtaskInitiator.setTask(task); handler.post(mtaskInitiator); totalQueued++; } public synchronized void removeTasks() { if (mtaskInitiator != null) { handler.removeCallbacks(mtaskInitiator); totalQueued = 0; totalCompleted = 0; } } class TaskInitiator implements Runnable { private DownloadTask task = null; public DownloadTask getTask() { return task; } public void setTask(DownloadTask task) { this.task = task; } public TaskInitiator() { // TODO Auto-generated constructor stub } @Override public void run() { try { task.run(); } finally { if (isStop) { Looper.myLooper().quit(); } synchronized (DownloadThread.this) { signalUpdate(task.getCurrentBitmap(), task.getCurrentFeedUrl()); task.setCurrentBitmap(null); totalCompleted++; } } } } public synchronized int getTotalQueued() { return totalQueued; } public synchronized int getTotalCompleted() { return totalCompleted; } public void signalUpdate(Bitmap bmap, String bmapUrl) { if (listener != null) { listener.handleDownloadThreadUpdate(bmap, bmapUrl); } } } </code></pre> <p>And let your Activity component implement the below interface for callback from Thread class.</p> <pre><code>public interface DownloadThreadListener { void handleDownloadThreadUpdate(Bitmap bmap,String bmapUrl); Map&lt;String, Bitmap&gt; giveImages_Map(); ConcurrentHashMap&lt;String, SoftReference&lt;Bitmap&gt;&gt; giveSoftImages_Map(); </code></pre> <p>}</p>
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    1. COAccepting yours answer as it gave me some direction to think this way. But I solved my problem rather in a very different way using thread and calling method on each screen individually.
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Guidance
A row detail

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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