[Android] Add scrollToBegin to scroller. (#2165)

* feature: if scrooler has attr `scrollToBegin=false`,then scroller will not scroller to begin position auto when content layout change * doc pr: [apache/incubator-weex-site#334](apache/incubator-weex-site#334)
apache · Feb 27, 2019 · 06c6e27 · 06c6e27
1 parent 63b9ba2
commit 06c6e27
Showing 1 changed file with 10 additions and 1 deletion.
diff --git a/android/sdk/src/main/java/com/taobao/weex/ui/component/WXScroller.java b/android/sdk/src/main/java/com/taobao/weex/ui/component/WXScroller.java
@@ -494,7 +494,16 @@ public void run() {
                   int mw = frameLayout.getMeasuredWidth();
                   scrollView.scrollTo(mw, component.getScrollY());
                 } else {
-                  scrollView.scrollTo(0, component.getScrollY());
+                  boolean scrollToBegin = true;
+                  Object scrollToBeginOnLTR = getAttrs().get("scrollToBegin");
+                  if (scrollToBeginOnLTR instanceof String){
+                    if("false".equalsIgnoreCase((String)scrollToBeginOnLTR)){
+                      scrollToBegin = false;
+                    }
+                  }
+                  if (scrollToBegin){
+                    scrollView.scrollTo(0, component.getScrollY());
+                  }
                 }
               }
             });