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copied!<p>I think, the simplest way is to introduce the callback mechanism through listeners. To do so, add a listener interface (e.g., <code>GameListener.java</code>), hold reference to the instance of this interface and invoke its methods in the class, where all your game logic appears (let's say <code>Game.java</code>). Then, let your <code>AppelzActivity</code> implement this interface and show dialog when appropriate callback is called:</p> <p><strong><code>GameListener.java</code></strong>:</p> <pre><code>public interface GameListener { /** * ... * NOTE: may be called on any thread */ public void onRoundFinished(); ... } </code></pre> <p><strong><code>Game.java</code></strong>:</p> <pre><code>public class Game { private GameListener listener; public Game(GameListener listener) { this.listener = listener; } ... //Let's say, round finishes here public void finishRound() { ... listener.onRoundFinished(); } } </code></pre> <p><strong><code>AppelzActivity.java</code></strong>:</p> <pre><code>public class AppelzActivity extends Activity implements GameListener { private static final int DLG_ROUND_FINISHED = 1; ... @Override public void onRoundFinished() { runOnUiThread(new Runnable() { @Override public void run() { showDialog(DLG_ROUND_FINISHED); } }); } @Override protected Dialog onCreateDialog(int id) { Dialog dialog = null; switch (id) { case DLG_ROUND_FINISHED: AlertDialog.Builder builder = new AlertDialog.Builder(this); ... // init your dialog here dialog = builder.create(); break; } return dialog; } } </code></pre>

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