Try out workaround code by @florianPOLARSTEPS #105

Author: henrytao-me

sample/src/main/java/me/henrytao/smoothappbarlayoutdemo/activity/SmoothScrollExitUntilCollapsedActivity.java

@@ -24,23 +24,32 @@
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.Toast;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import me.henrytao.recyclerview.SimpleRecyclerViewAdapter;
 import me.henrytao.recyclerview.holder.HeaderHolder;
+import me.henrytao.smoothappbarlayout.SmoothAppBarLayout;
 import me.henrytao.smoothappbarlayoutdemo.R;
 import me.henrytao.smoothappbarlayoutdemo.apdater.DynamicAdapter;
 import me.henrytao.smoothappbarlayoutdemo.util.Utils;
 
 public class SmoothScrollExitUntilCollapsedActivity extends BaseActivity {
 
+  @Bind(R.id.btn_action)
+  Button vBtnAction;
+
   @Bind(R.id.recycler_view_target)
   RecyclerView vRecyclerView;
 
   @Bind(R.id.toolbar)
   Toolbar vToolbar;
 
+  @Bind(R.id.smooth_app_bar_layout)
+  SmoothAppBarLayout vSmoothAppBarLayout;
+
   private DynamicAdapter<String> mAdapter;
 
   @Override
@@ -85,5 +94,19 @@ public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
       }
     });
     itemTouchHelper.attachToRecyclerView(vRecyclerView);
+
+    vBtnAction.setOnClickListener(new View.OnClickListener() {
+      @Override
+      public void onClick(View v) {
+        Toast.makeText(getApplicationContext(), "hello", Toast.LENGTH_SHORT).show();
+      }
+    });
+
+    vSmoothAppBarLayout.setOnClickListener(new View.OnClickListener() {
+      @Override
+      public void onClick(View v) {
+        Toast.makeText(getApplicationContext(), "hello", Toast.LENGTH_SHORT).show();
+      }
+    });
   }
 }

sample/src/main/res/layout/activity_smooth_scroll_exit_until_collapsed.xml

@@ -42,6 +42,12 @@
         app:layout_collapseMode="pin"
         app:navigationIcon="@drawable/ic_menu_arrow_back"
         style="@style/AppStyle.MdToolbar" />
+
+      <Button
+        android:id="@+id/btn_action"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Click me" />
     </android.support.design.widget.CollapsingToolbarLayout>
   </me.henrytao.smoothappbarlayout.SmoothAppBarLayout>
 </android.support.design.widget.CoordinatorLayout>

smooth-app-bar-layout/src/main/java/me/henrytao/smoothappbarlayout/SmoothAppBarLayout.java

@@ -28,6 +28,7 @@
 import android.support.v7.widget.RecyclerView;
 import android.util.AttributeSet;
 import android.util.Log;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.animation.Interpolator;
@@ -54,6 +55,8 @@ public class SmoothAppBarLayout extends AppBarLayout {
 
   private static final String ARG_SUPER = "ARG_SUPER";
 
+  private static final int CUSTOM_EDGE_FLAG = 2023477;
+
   public static boolean DEBUG = false;
 
   protected final List<WeakReference<OnOffsetChangedListener>> mOffsetChangedListeners = new ArrayList<>();
@@ -208,6 +211,32 @@ protected Parcelable onSaveInstanceState() {
     return bundle;
   }
 
+  @Override
+  public boolean dispatchTouchEvent(MotionEvent ev) {
+
+    // We need to check wether we have arrived from our own triggered motion dispatch,
+    // There are no really appropriate fields on MotionEvents to store custom data, so we abuse edgeflags
+    if (ev.getEdgeFlags() == CUSTOM_EDGE_FLAG) {
+      return false;
+    }
+
+    boolean dispatched = super.dispatchTouchEvent(ev);
+    if (dispatched && ev.getAction() == MotionEvent.ACTION_MOVE) {
+      // After we know some view in our hierarchy would want to receive the move touch event, we don't want it to have though,
+      // we create a new motion event which will cancel our current motion event stream and will be disregarded by appbarlayout,
+      // so CoordinatorLayout.Behaviour can receive the new motion event stream
+      MotionEvent motionEvent = MotionEvent.obtain(ev);
+      motionEvent.offsetLocation(getLeft(), getTop());
+      motionEvent.setAction(MotionEvent.ACTION_DOWN);
+      motionEvent.setEdgeFlags(CUSTOM_EDGE_FLAG);
+
+      // getParent() cannot return null, since well - who would have called this method
+      ((ViewGroup) getParent()).dispatchTouchEvent(motionEvent);
+      return false;
+    }
+    return dispatched;
+  }
+
   public int getCurrentOffset() {
     return -Utils.parseInt(getTag(R.id.tag_current_offset));
   }