##用来干什么? What is it used for?
给用户下拉刷新的操作带来更好的视觉体验
For bringing a better visual experience when pull to refresh
##如何去使用 How to use
基于开源框架 android-Ultra-Pull-To-Refresh
在build.gradle中:
compile 'in.srain.cube:ultra-ptr:1.0.11'
在xml中:within xml
<in.srain.cube.views.ptr.PtrFrameLayout
android:id="@+id/lay_ptr_frame"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/store_house_ptr_image_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF"
android:gravity="center_horizontal">
</LinearLayout>
</in.srain.cube.views.ptr.PtrFrameLayout>
为了达到这样的效果,仅仅需要在activity中: in order to get the wanted effect, you need open the activity:
storeHousePtrImageContent = findViewById(R.id.store_house_ptr_image_content);
layPtrFrame = (PtrFrameLayout) findViewById(R.id.lay_ptr_frame);
final PtrMDHeader header = new PtrMDHeader(getContext());
layPtrFrame.setHeaderView(header);
layPtrFrame.addPtrUIHandler(header);
layPtrFrame.setPtrHandler(new PtrHandler() {
@Override
public boolean checkCanDoRefresh(PtrFrameLayout frame, View content, View header) {
return PtrDefaultHandler.checkContentCanBePulledDown(frame, storeHousePtrImageContent, header);
}
@Override
public void onRefreshBegin(final PtrFrameLayout frame) {
postDelayed(new Runnable() {
@Override
public void run() {
// 模仿延时3000毫秒
boolean refreshResult = false;
header.refreshComplete(refreshResult, frame);
}
}, 3000);
}
});
改变 refreshResult
的值来分别显示刷新成功和刷新失败的结果。
代码刷新成功和刷新失败使用了图片素材 ptr_header_md_fail.png
和 ptr_header_md_success.png
,替换素材可以显示不一样的效果。
##更加详细的源码分析和实现思路讲解 请戳这里
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