Recently played is now history. Songs are always added to the history but their play count will be only increased if they were played at least half. This makes the top tracks much more accurate.

app/src/main/java/com/kabouzeid/gramophone/helper/StopWatch.java

@@ -0,0 +1,82 @@
+package com.kabouzeid.gramophone.helper;
+
+/**
+ * Simple thread safe stop watch.
+ *
+ * @author Karim Abou Zeid (kabouzeid)
+ */
+public class StopWatch {
+
+    /**
+     * The time the stop watch was last started.
+     */
+    private long startTime;
+
+    /**
+     * The time elapsed before the current {@link #startTime}.
+     */
+    private long previousElapsedTime;
+
+    /**
+     * Whether the stop watch is currently running or not.
+     */
+    private boolean isRunning;
+
+    /**
+     * Starts or continues the stop watch.
+     *
+     * @see #pause()
+     * @see #reset()
+     */
+    public void start() {
+        synchronized (this) {
+            startTime = System.currentTimeMillis();
+            isRunning = true;
+        }
+    }
+
+    /**
+     * Pauses the stop watch. It can be continued later from {@link #start()}.
+     *
+     * @see #start()
+     * @see #reset()
+     */
+    public void pause() {
+        synchronized (this) {
+            previousElapsedTime += System.currentTimeMillis() - startTime;
+            isRunning = false;
+        }
+    }
+
+    /**
+     * Stops and resets the stop watch to zero milliseconds.
+     *
+     * @see #start()
+     * @see #pause()
+     */
+    public void reset() {
+        synchronized (this) {
+            startTime = 0;
+            previousElapsedTime = 0;
+            isRunning = false;
+        }
+    }
+
+    /**
+     * @return the total elapsed time in milliseconds
+     */
+    public final long getElapsedTime() {
+        synchronized (this) {
+            long currentElapsedTime = 0;
+            if (isRunning) {
+                currentElapsedTime = System.currentTimeMillis() - startTime;
+            }
+            return previousElapsedTime + currentElapsedTime;
+        }
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%d millis", getElapsedTime());
+    }
+}