Added native image loader support for artist images. Automatically recreate activity onrResume when colors changed fixes issues #2 and #39. Also Butterknife should be used now everywhere #40

app/src/main/java/com/kabouzeid/gramophone/misc/LagTracker.java

@@ -0,0 +1,68 @@
+package com.kabouzeid.gramophone.misc;
+
+import android.util.Log;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * @author Aidan Follestad (afollestad)
+ */
+public class LagTracker {
+
+    private static LagTracker mSingleton;
+    private static Map<String, Long> mMap;
+    private boolean mEnabled = true;
+
+    private LagTracker() {
+        mMap = new HashMap<>();
+    }
+
+    public static LagTracker get() {
+        if (mSingleton == null)
+            mSingleton = new LagTracker();
+        return mSingleton;
+    }
+
+    public LagTracker enable() {
+        mEnabled = true;
+        return this;
+    }
+
+    public LagTracker disable() {
+        mEnabled = false;
+        return this;
+    }
+
+    public void start(String key) {
+        final long start = System.nanoTime();
+        if (!mEnabled) {
+            if (!mMap.isEmpty())
+                mMap.clear();
+            return;
+        }
+        mMap.put(key, start);
+    }
+
+    public void end(String key) {
+        final long end = System.nanoTime();
+        if (!mEnabled) {
+            if (!mMap.isEmpty())
+                mMap.clear();
+            return;
+        }
+        if (!mMap.containsKey(key))
+            throw new IllegalStateException("No start time found for " + key);
+        long start = mMap.get(key);
+        long diff = end - start;
+        print(key, diff);
+        mMap.remove(key);
+    }
+
+    private void print(String key, long diff) {
+        long ms = TimeUnit.NANOSECONDS.toMillis(diff);
+        long s = TimeUnit.NANOSECONDS.toSeconds(diff);
+        Log.d("LagTracker", "[" + key + " completed in]: " + diff + " ns (" + ms + "ms, " + s + "s)");
+    }
+}