Created
April 21, 2015 14:30
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Android SwipeRefreshLayout with multiple swipeable children. Min API 14.
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/* | |
* Copyright 2014 Uwe Trottmann | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
package com.example.android; | |
import android.content.Context; | |
import android.support.v4.view.ViewCompat; | |
import android.support.v4.widget.SwipeRefreshLayout; | |
import android.util.AttributeSet; | |
import android.view.View; | |
/** | |
* A {@link android.support.v4.widget.SwipeRefreshLayout} which only checks the (scrollable!) views | |
* set through {@link #setSwipeableChildren(int...)} if they can scroll up to determine whether to | |
* trigger the refresh gesture. | |
*/ | |
public class MultiSwipeRefreshLayout extends SwipeRefreshLayout { | |
private View[] swipeableChildren; | |
public MultiSwipeRefreshLayout(Context context) { | |
super(context); | |
} | |
public MultiSwipeRefreshLayout(Context context, AttributeSet attrs) { | |
super(context, attrs); | |
} | |
/** | |
* Set the children to be checked if they can scroll up and hence should prevent the refresh | |
* gesture from being triggered. | |
*/ | |
public void setSwipeableChildren(final int... ids) { | |
if (ids == null) { | |
return; | |
} | |
// find child views | |
swipeableChildren = new View[ids.length]; | |
for (int i = 0; i < ids.length; i++) { | |
View view = findViewById(ids[i]); | |
if (view == null) { | |
throw new IllegalArgumentException( | |
"Supplied view ids need to exist in this layout."); | |
} | |
swipeableChildren[i] = view; | |
} | |
} | |
@Override | |
public boolean canChildScrollUp() { | |
if (swipeableChildren != null) { | |
// check if any supplied swipeable children can scroll up | |
for (View view : swipeableChildren) { | |
if (view.isShown() && ViewCompat.canScrollVertically(view, -1)) { | |
// prevent refresh gesture | |
return true; | |
} | |
} | |
} | |
return false; | |
} | |
} |
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Nice. Decent explanation of the issue: http://innodroid.com/blog/post/recycler-empty-swipe-refresh