Created
November 4, 2014 16:10
GridRecyclerView. A Grid-specific RecyclerView that can use gridLayoutAnimation.
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/* | |
* Copyright (C) 2014 Freddie (Musenkishi) Lust-Hed | |
* | |
* 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.musenkishi.gists.view; | |
import android.content.Context; | |
import android.support.v7.widget.GridLayoutManager; | |
import android.support.v7.widget.RecyclerView; | |
import android.util.AttributeSet; | |
import android.view.View; | |
import android.view.ViewGroup; | |
import android.view.animation.GridLayoutAnimationController; | |
/** | |
* An extension of RecyclerView, focused more on resembling a GridView. | |
* Unlike {@link android.support.v7.widget.RecyclerView}, this view can handle | |
* {@code <gridLayoutAnimation>} as long as you provide it a | |
* {@link android.support.v7.widget.GridLayoutManager} in | |
* {@code setLayoutManager(LayoutManager layout)}. | |
* | |
* Created by Freddie (Musenkishi) Lust-Hed. | |
*/ | |
public class GridRecyclerView extends RecyclerView { | |
public GridRecyclerView(Context context) { | |
super(context); | |
} | |
public GridRecyclerView(Context context, AttributeSet attrs) { | |
super(context, attrs); | |
} | |
public GridRecyclerView(Context context, AttributeSet attrs, int defStyle) { | |
super(context, attrs, defStyle); | |
} | |
@Override | |
public void setLayoutManager(LayoutManager layout) { | |
if (layout instanceof GridLayoutManager){ | |
super.setLayoutManager(layout); | |
} else { | |
throw new ClassCastException("You should only use a GridLayoutManager with GridRecyclerView."); | |
} | |
} | |
@Override | |
protected void attachLayoutAnimationParameters(View child, ViewGroup.LayoutParams params, int index, int count) { | |
if (getAdapter() != null && getLayoutManager() instanceof GridLayoutManager){ | |
GridLayoutAnimationController.AnimationParameters animationParams = | |
(GridLayoutAnimationController.AnimationParameters) params.layoutAnimationParameters; | |
if (animationParams == null) { | |
animationParams = new GridLayoutAnimationController.AnimationParameters(); | |
params.layoutAnimationParameters = animationParams; | |
} | |
int columns = ((GridLayoutManager) getLayoutManager()).getSpanCount(); | |
animationParams.count = count; | |
animationParams.index = index; | |
animationParams.columnsCount = columns; | |
animationParams.rowsCount = count / columns; | |
final int invertedIndex = count - 1 - index; | |
animationParams.column = columns - 1 - (invertedIndex % columns); | |
animationParams.row = animationParams.rowsCount - 1 - invertedIndex / columns; | |
} else { | |
super.attachLayoutAnimationParameters(child, params, index, count); | |
} | |
} | |
} |
No clue. Are you calling recyclerView.scheduleLayoutAnimation();
after setting the adapter? And have you set android:layoutAnimation="@anim/your_layout_animation"
to your
in the layout?
I had the same issue as @dominicthomas setting layout animation xml fixed it.
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This looks great, thanks! In my implementation attachLayoutAnimationParameters is never called. Any ideas why?