我正在尝试使用SwipeRefreshLayout,如下图所示。但是当我运行该应用程序并且最初随附的RecyclerView中没有数据时, 滑动时,我不显示刷新图标。尽管我setRefreshing(true)如下代码所示
请让我知道为什么在滑动图标时不显示滑动图标。
代码:
this.mSwipeToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
mSwipeToRefresh.setEnabled(true);
mSwipeToRefresh.setRefreshing(true);
startIntentService(TwitterTrendsAPIService.class);
}
});
布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.pc_amr.twittertrendsnearlocation.ActMain">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/actMainTextViewURLLabel"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center"
android:text="URL: " />
<EditText
android:id="@+id/actMainEditTextURLContents"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:hint="Please Enter Your URL" />
</LinearLayout>
<Button
android:id="@+id/actMainButtonFetchURL"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Fetch URL" />
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/actMainSwipeToRefresh"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/actMainRecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:scrollbars="vertical" />
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>