Optimize #733

Author: YoKeyword

fragmentation_core/src/main/java/me/yokeyword/fragmentation/TransactionDelegate.java

@@ -79,7 +79,7 @@ public void run() {
     }
 
     void loadRootTransaction(final FragmentManager fm, final int containerId, final ISupportFragment to, final boolean addToBackStack, final boolean allowAnimation) {
-        enqueue(fm, new Action() {
+        enqueue(fm, new Action(Action.ACTION_LOAD) {
             @Override
             public void run() {
                 bindContainerId(containerId, to);
@@ -98,7 +98,7 @@ public void run() {
     }
 
     void loadMultipleRootTransaction(final FragmentManager fm, final int containerId, final int showPosition, final ISupportFragment... tos) {
-        enqueue(fm, new Action() {
+        enqueue(fm, new Action(Action.ACTION_LOAD) {
             @Override
             public void run() {
                 FragmentTransaction ft = fm.beginTransaction();

fragmentation_core/src/main/java/me/yokeyword/fragmentation/queue/Action.java

@@ -13,6 +13,7 @@ public abstract class Action {
     public static final int ACTION_POP = 1;
     public static final int ACTION_POP_MOCK = 2;
     public static final int ACTION_BACK = 3;
+    public static final int ACTION_LOAD = 4;
 
     public FragmentManager fragmentManager;
     public int action = ACTION_NORMAL;

fragmentation_core/src/main/java/me/yokeyword/fragmentation/queue/ActionQueue.java

@@ -1,6 +1,7 @@
 package me.yokeyword.fragmentation.queue;
 
 import android.os.Handler;
+import android.os.Looper;
 
 import java.util.LinkedList;
 import java.util.Queue;
@@ -24,6 +25,12 @@ public ActionQueue(Handler mainHandler) {
     public void enqueue(final Action action) {
         if (isThrottleBACK(action)) return;
 
+        if (action.action == Action.ACTION_LOAD && mQueue.isEmpty()
+                && Thread.currentThread() == Looper.getMainLooper().getThread()) {
+            action.run();
+            return;
+        }
+
         mMainHandler.post(new Runnable() {
             @Override
             public void run() {