浅谈Android RecyclerView 间距全适配
作者：anonymoussf
本篇文章主要介绍了浅谈Android RecyclerView 间距全适配，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧
本文介绍了Android RecyclerView 间距全适配，分享给大家，具体如下：
LinearLayoutManager spacing
import android.graphics.Rect;
import android.support.v7.widget.RecyclerView;
import android.view.View;
/**
* Created by anonymous on 2016/9/9 0009.
* <p>
* SpacesItemDecoration
* <p>
* mRecyclerView.addItemDecoration(new SpacesItemDecoration(5));
*/
public class SpacesItemDecoration extends RecyclerView.ItemDecoration {
private int space;
public SpacesItemDecoration(int space) {
this.space = space;
}
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
outRect.left = space;
outRect.right = space;
outRect.bottom = space;
// Add top margin only for the first item to avoid double space between items
if (parent.getChildLayoutPosition(view) == 0) {
outRect.top = space;
} else {
outRect.top = 0;
}
}
}
使用方法很简单，上面注释中也已经给出：
mRecyclerView.addItemDecoration(new SpacesItemDecoration(5));
GridLayoutManager or StaggeredGridLayoutManager spacing
import android.graphics.Rect;
import android.support.v7.widget.RecyclerView;
import android.view.View;
/**
* Created by anonymous on 2016/9/9 0009.
* <p>
* GridSpacingItemDecoration
* <p>
* int spanCount = 3; // 3 columns
* int spacing = 50; // 50px
* boolean includeEdge = false;
* recyclerView.addItemDecoration(new GridSpacingItemDecoration(spanCount, spacing, includeEdge));
*/
public class GridSpacingItemDecoration extends RecyclerView.ItemDecoration {
private int spanCount;
private int spacing;
private boolean includeEdge;
public GridSpacingItemDecoration(int spanCount, int spacing, boolean includeEdge) {
this.spanCount = spanCount;
this.spacing = spacing;
this.includeEdge = includeEdge;
}
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
int position = parent.getChildAdapterPosition(view); // item position
int column = position % spanCount; // item column
if (includeEdge) {
outRect.left = spacing - column * spacing / spanCount; // spacing - column * ((1f / spanCount) * spacing)
outRect.right = (column + 1) * spacing / spanCount; // (column + 1) * ((1f / spanCount) * spacing)
if (position < spanCount) { // top edge
outRect.top = spacing;
}
outRect.bottom = spacing; // item bottom
} else {
outRect.left = column * spacing / spanCount; // column * ((1f / spanCount) * spacing)
outRect.right = spacing - (column + 1) * spacing / spanCount; // spacing - (column + 1) * ((1f / spanCount) * spacing)
if (position >= spanCount) {
outRect.top = spacing; // item top
}
}
}
}
此处不仅对间距进行了处理，而且对spanCount也进行了处理，使用方法：
int spanCount = 3; // 3 columns
int spacing = 50; // 50px
boolean includeEdge = false;
mRecyclerView.addItemDecoration(new GridSpacingItemDecoration(spanCount, spacing, includeEdge));
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。