Expose main thread scheduler through AndroidSchedulers class

Author: mttkay

rxjava-contrib/rxjava-android/src/main/java/rx/concurrency/AndroidSchedulers.java

@@ -0,0 +1,19 @@
+package rx.concurrency;
+
+import android.os.Handler;
+import android.os.Looper;
+import rx.Scheduler;
+
+public class AndroidSchedulers {
+
+    private static final Scheduler MAIN_THREAD_SCHEDULER =
+            new HandlerThreadScheduler(new Handler(Looper.getMainLooper()));
+
+    public static Scheduler handlerThread(final Handler handler) {
+        return new HandlerThreadScheduler(handler);
+    }
+
+    public static Scheduler mainThread() {
+        return MAIN_THREAD_SCHEDULER;
+    }
+}