我使用GridLayoutManger
将我的RecyclerView
定义为一个网格,它的span count为3,已经正常工作。我还添加了一个项装饰器到我的recycler view中,这将管理网格项之间的间距,这也运行良好。
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
}
}
}
}
我对我的RecyclerView添加item decoration的实现方式:
mBuddiesGrid = (RecyclerView) findViewById(R.id.buddies_grid);
mLayoutManager = new GridLayoutManager(getApplicationContext(), 3);
mBuddiesGrid.addItemDecoration(new GridSpacingItemDecoration(3, (int) dpToPx(10) , true));
mBuddiesAdapter = new BuddiesGridAdapter(getApplicationContext(), new Buddies());
mBuddiesGrid.setLayoutManager(mLayoutManager);
我的网格项目XML布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<ImageView
android:layout_weight="1"
android:cropToPadding="false"
android:id="@+id/profile_picture"
android:scaleType="centerCrop"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<TextView
android:text="Theodore"
android:includeFontPadding="false"
android:textColor="@android:color/black"
android:id="@+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
通过在网格项之间添加空格将调整网格项的宽度,这可能会导致我的项目视图未能获得比例大小。我想要实现的是动态将网格项高度调整为其宽度相等。我该怎么做?
GridSpacingItemDecoration
,它运行得非常好! - Albert Vila Calvo