add screen capture and color searching

common/src/main/java/com/stardust/app/OnActivityResultDelegate.java

@@ -0,0 +1,54 @@
+package com.stardust.app;
+
+import android.content.Intent;
+import android.support.annotation.NonNull;
+import android.util.SparseArray;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by Stardust on 2017/3/5.
+ */
+
+public interface OnActivityResultDelegate {
+
+    void onActivityResult(int requestCode, int resultCode, Intent data);
+
+    interface DelegateHost {
+        @NonNull
+        Mediator getOnActivityResultDelegateMediator();
+    }
+
+    class Mediator implements OnActivityResultDelegate {
+
+        private SparseArray<OnActivityResultDelegate> mSpecialDelegate = new SparseArray<>();
+        private List<OnActivityResultDelegate> mDelegates = new ArrayList<>();
+
+        public void onActivityResult(int requestCode, int resultCode, Intent data) {
+            OnActivityResultDelegate delegate = mSpecialDelegate.get(requestCode);
+            if (delegate != null) {
+                delegate.onActivityResult(requestCode, resultCode, data);
+            }
+            for (OnActivityResultDelegate d : mDelegates) {
+                d.onActivityResult(requestCode, resultCode, data);
+            }
+        }
+
+        public void addDelegate(OnActivityResultDelegate delegate) {
+            mDelegates.add(delegate);
+        }
+
+        public void addDelegate(int requestCode, OnActivityResultDelegate delegate) {
+            mSpecialDelegate.put(requestCode, delegate);
+        }
+
+        public void removeDelegate(OnActivityResultDelegate delegate) {
+            if (mDelegates.remove(delegate)) {
+                // TODO: 2017/3/16 优化
+                mSpecialDelegate.removeAt(mSpecialDelegate.indexOfValue(delegate));
+            }
+        }
+    }
+
+}