Paste_Image.png

蛋疼的问题，右边留空那么多。

<android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="wrap_content"
    android:background="#ff0"
    >

</android.support.v7.widget.RecyclerView>

item项的布局如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical" android:layout_width="wrap_content"
    android:background="#f0f"
    android:gravity="center"
    android:layout_height="wrap_content">

    <ImageView
        android:layout_width="52dp"
        android:layout_height="52dp"
        app:srcCompat="@mipmap/home_new"
        android:id="@+id/iv_icon" />

    <TextView
        android:text="TextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="14sp"
        android:textColor="#4A4A4A"
        android:layout_marginTop="10dp"
        android:id="@+id/tv_name" />
</LinearLayout>

设置GridLayoutManager 设置一行显示4个

                GridLayoutManager  gridLayoutManager = new GridLayoutManager(container.getContext(), 4);
                recyclerView.setLayoutManager(gridLayoutManager);//一行显示4个

效果就成上面那样蛋疼了，经分析后，发现调整下item的根LinearLayout 的宽属性即可

android:layout_width="match_parent"

Paste_Image.png

效果如下

Paste_Image.png

若需要间距，就配置一下ItemDecoration

Paste_Image.png

    class MarginDecoration extends RecyclerView.ItemDecoration {
        private int margin;

        public MarginDecoration(Context context) {
            margin = PxUtils.dpToPx(10,context);
        }

        @Override
        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
            outRect.set(margin, margin, margin, margin);
        }
    }