diff -r ed1d52c5aa94 -r 763d3961400b project_files/Android-build/SDL-android-project/src/org/hedgewars/hedgeroid/util/TickHandler.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/project_files/Android-build/SDL-android-project/src/org/hedgewars/hedgeroid/util/TickHandler.java	Sat Aug 18 00:47:51 2012 +0200
@@ -0,0 +1,54 @@
+package org.hedgewars.hedgeroid.util;
+
+import android.os.Handler;
+import android.os.Looper;
+import android.os.Message;
+
+/**
+ * This class handles regularly calling a specified runnable
+ * on the looper provided in the constructor. The first call
+ * occurs without delay (though still via the looper), all
+ * following calls are delayed by (approximately) the interval.
+ * The interval can be changed at any time, which will cause
+ * an immediate execution of the runnable again.
+ */
+public class TickHandler extends Handler {
+	private final Runnable callback;
+	private int messageId;
+	private long interval;
+	private boolean running;
+	
+	public TickHandler(Looper looper, long interval, Runnable callback) {
+		super(looper);
+		this.callback = callback;
+		this.interval = interval;
+	}
+	
+	public synchronized void stop() {
+		messageId++;
+		running = false;
+	}
+	
+	public synchronized void start() {
+		messageId++;
+		sendMessage(obtainMessage(messageId));
+		running = true;
+	}
+	
+	public synchronized void setInterval(long interval) {
+		this.interval = interval;
+		if(running) {
+			start();
+		}
+	}
+	
+	@Override
+	public synchronized void handleMessage(Message msg) {
+		if(msg.what == messageId) {
+			callback.run();
+		}
+		if(msg.what == messageId) {
+			sendMessageDelayed(obtainMessage(messageId), interval);
+		}
+	}
+}
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