我正在使用recyclerview的GridLayoutManager来显示自定义画廊。我已经实现了所有画廊的功能,但是有一个小问题困扰着我。在一行中,我有3张图片。但是我需要减少图像之间的间距。在这样做时,我不想在一行中显示超过3张图片,但如果需要,图像大小可以增加。
RecyclerViewItemDecorator
:public class RecyclerViewItemDecorator extends RecyclerView.ItemDecoration {
private int spaceInPixels;
public RecyclerViewItemDecorator(int spaceInPixels) {
this.spaceInPixels = spaceInPixels;
}
@Override
public void getItemOffsets(Rect outRect, View view,
RecyclerView parent, RecyclerView.State state) {
outRect.left = spaceInPixels;
outRect.right = spaceInPixels;
outRect.bottom = spaceInPixels;
if (parent.getChildLayoutPosition(view) == 0) {
outRect.top = spaceInPixels;
} else {
outRect.top = 0;
}
}
}
然后将其添加到您的RecyclerView
中:
// For example 10 pixels
int spaceInPixels = 10;
mRecyclerView.addItemDecoration(new RecyclerViewItemDecorator(spaceInPixels));
this.mRecyclerView.setLayoutManager(new GridLayoutManager(getContext(), 3));
this.mRecyclerView.addItemDecoration(new HorizontalDividerItemDecoration.Builder(getContext())
.color(Color.DKGRAY)
.build());
this.mRecyclerView.addItemDecoration(new VerticalDividerItemDecoration.Builder(getContext())
.color(Color.DKGRAY)
.build());
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RlayoutGrid"
android:layout_width="220dp"
android:layout_height="170dp"
android:background="@android:color/black">
<ImageView
android:id="@+id/prefence_imageButton"
android:layout_width="match_parent"
android:layout_height="170dp"
android:background="@android:color/black"
android:focusable="false"
android:focusableInTouchMode="false"
android:scaleType="fitXY"
/>
</RelativeLayout>
并将此添加到您的 build.gradle 中
compile 'com.yqritc:recyclerview-flexibledivider:1.2.4'
为了去除间距,您可以使用outRect.setEmpty()
RecyclerView.ItemDecoration divider = new RecyclerView.ItemDecoration(){
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
outRect.setEmpty();
}
};
grid.addItemDecoration(divider);