使用RecyclerView和GridLayoutManager布局以及设置ItemDecoration实现ImageView元素之间的间隔。
步骤如下:
RecyclerView recyclerView = findViewById(R.id.recyclerView);
GridLayoutManager layoutManager = new GridLayoutManager(this, 2);
recyclerView.setLayoutManager(layoutManager);
MyAdapter adapter = new MyAdapter(imageList);
recyclerView.setAdapter(adapter);
recyclerView.addItemDecoration(new GridSpacingItemDecoration(2, 16, true));
其中,“2”表示列数,即每行显示几个ImageView元素,“16”表示间隔大小,可以根据实际情况设置。
public class GridSpacingItemDecoration extends RecyclerView.ItemDecoration {
private final int spanCount;
private final int spacing;
private final 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
}
}
}
}
public class MyAdapter extends RecyclerView.Adapter {
private final List imageList;