SwiperefreshLayout Android中 [英] SwiperefreshLayout in Android

问题描述

我使用的 SwipeRefreshLayout 在我下面的布局：

i am using SwipeRefreshLayout in my below layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:background="@color/homePageBackground"
  android:orientation="vertical" >


<android.support.v4.widget.SwipeRefreshLayout
    android:id="@+id/swipeRefreshLayout_listView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >
<fragment
        android:id="@+id/announcementHomefragment"
        android:name="in.test.app.AnnouncementFragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/homePageBackground" >

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="15dp"
                android:background="@color/homePageBackground" >

                <TextView
                    android:id="@+id/newsTitle"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:layout_marginLeft="15dp"
                    android:layout_marginTop="5dp"
                    android:gravity="center"
                    android:text="@string/new_list"
                    android:textAppearance="?android:attr/textAppearanceSmall"
                    android:textColor="@color/white"
                    android:textStyle="bold" />

                <fragment
                    android:id="@+id/newshomefragment"
                    android:name="in.test.app.NewsFragment"
                    android:layout_width="wrap_content"
                    android:layout_height="190dp"
                    android:layout_below="@id/newsTitle"
                    android:layout_marginTop="-15dp" />

                <TextView
                    android:id="@+id/productTitle"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@id/newshomefragment"
                    android:layout_gravity="center"
                    android:layout_marginLeft="15dp"
                    android:layout_marginTop="5dp"
                    android:gravity="center"
                    android:text="@string/product_in_home"
                    android:textAppearance="?android:attr/textAppearanceSmall"
                    android:textColor="@color/white"
                    android:textStyle="bold" />

                <fragment
                    android:id="@+id/proCategoryhomefragment"
                    android:name="in.test.app.CategoryFragment"
                    android:layout_width="wrap_content"
                    android:layout_height="170dp"
                    android:layout_below="@id/productTitle"
                    android:layout_marginTop="-15dp" />

                <TextView
                    android:id="@+id/trainingTitle"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@id/proCategoryhomefragment"
                    android:layout_gravity="center"
                    android:layout_marginLeft="15dp"
                    android:layout_marginTop="2dp"
                    android:gravity="center"
                    android:text="@string/trainings_in_home"
                    android:textAppearance="?android:attr/textAppearanceSmall"
                    android:textColor="@color/white"
                    android:textStyle="bold" />

                <fragment
                    android:id="@+id/trainingfragment"
                    android:name="in.test.app.TrainingFragment"
                    android:layout_width="match_parent"
                    android:layout_height="180dp"
                    android:layout_below="@id/trainingTitle"
                    android:layout_marginBottom="10dp"
                    android:layout_marginTop="-15dp" />
            </RelativeLayout>
        </ScrollView>
    </LinearLayout>
</android.support.v4.widget.SwipeRefreshLayout>

当我拉下我的 SwipeRefreshLayout 这是工作，但你可以在上面code看我里面有一个滚动视图。所以，当我拉了我的滚动视图，它的股价下跌，一半的图像无法显示，因为它下来。当我试图拉起我再次滚动视图是不会了。相反， SwipeRefreshLayout 越来越通话。我应该怎么办？

When I pull down my SwipeRefreshLayout it is working, but as you can see in the above code I have a scroll view inside that. So when I am pulling down my scroll view, it goes down and half the images are not showing because it came down. When I am trying to pull up again my scroll view is not going up. Instead, SwipeRefreshLayout is getting call. What should i do?

请帮我了。

推荐答案

我会说这是最好有一个扩展SwipeRefreshLayout与监听器能够从显示此布局类添加各种情况。

I would say it's better to have an extended SwipeRefreshLayout with listener to be able to add various conditions from the classes that display this layout.

像下面这样： GeneralSwipeRefreshLayout.java

public class GeneralSwipeRefreshLayout extends SwipeRefreshLayout {   
  private OnChildScrollUpListener mScrollListenerNeeded;

  public interface OnChildScrollUpListener {
    boolean canChildScrollUp();
  }

  public GeneralSwipeRefreshLayout(Context context) {
    super(context);   
  }
  public GeneralSwipeRefreshLayout(Context context, AttributeSet attrs) {
    super(context, attrs);   
  }

 /**
  * Listener that controls if scrolling up is allowed to child views or not
  */
  public void setOnChildScrollUpListener(OnChildScrollUpListener listener) {
    mScrollListenerNeeded = listener;   
  }

  @Override
  public boolean canChildScrollUp() {
    if (mScrollListenerNeeded == null) {
      Log.e(GeneralSwipeRefreshLayout.class.getSimpleName(), "listener is not defined!");
    }
    return mScrollListenerNeeded != null && mScrollListenerNeeded.canChildScrollUp();
  }
}

和那么你的类，它显示包含的ListView或GridView的布局，你可以做这样的事情SwipeRefreshLayout里面的：

And then inside your class that displays SwipeRefreshLayout containing ListView or GridView layout, you can do something like this:

mSwipeLayout.setOnChildScrollUpListener(new OnChildScrollUpListener() {
  @Override
  public boolean canChildScrollUp() {
    return mListView.getFirstVisiblePosition() > 0 || 
           mListView.getChildAt(0) == null || 
           mListView.getChildAt(0).getTop() < 0;
  }
});

这篇关于SwiperefreshLayout Android中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！