如何在 GridLayout 中使 ImageView 居中?

How to center ImageView in GridLayout?

我有一个全屏网格布局,有 8 行,每行 7 个 ImageView。 我需要所有行居中,它们之间没有 spaces(现在我有我上传的图像)。 space 必须只在顶部和底部。我已经尝试在 Internet 上找到解决方案,但我还没有找到。

XML:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <GridLayout
        android:id="@+id/gameGrid"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_centerVertical="true"
        android:rowCount="8"
        android:columnCount="7"
        >
        <!-- ROW 1-1 -->
        <ImageView
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:id="@+id/cellR1-1"
            android:layout_rowWeight="1"
            android:layout_columnWeight="1"
            app:srcCompat="@drawable/dl"
            />
        <!-- ROW 1-2 -->
        <ImageView
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:id="@+id/cellR1-2"
            android:layout_rowWeight="1"
            android:layout_columnWeight="1"
            app:srcCompat="@drawable/dl"
            />
        <!-- ROW ... -->
    </GridLayout>
</RelativeLayout>

我尝试将所有 ImageView 的高度设置为与宽度相同的解决方案,但我的代码不起作用:

void setGrid(){
    //setting the cell height as the cell widht
    int imagWidth = cell[0][0].getLayoutParams().width;
    for(int r=0;r<rowCount;r++)
        for(int c=0;c<columnCount;c++) {
            cell[r][c].getLayoutParams().height = imagWidth;
            cell[r][c].requestLayout();
        }
}

图片:

这可能对你有帮助,使用 RecyclerView 而不是 GridLayout

RecyclerView.LayoutManager recyclerViewLayoutManager = new GridLayoutManager(getApplicationContext(), 7); // 7 means how many column you want you can change according to your requirement.
recyclerView.setLayoutManager(recyclerViewLayoutManager);

尝试将 RecyclerView 与 GridLayoutManager 一起使用,如下所示:

GridLayoutManager layoutManager = new GridLayoutManager(getContext(), 7);
            YourAdapter adapter = new YourAdapter();
            recyclerView.setLayoutManager(layoutManager);
            recyclerView.setAdapter(adapter);

            int spacing = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 16,
                    Objects.requireNonNull(getContext()).getResources().getDisplayMetrics());
            recyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {
                @Override
                public void getItemOffsets(@NotNull Rect outRect, @NotNull View view, @NotNull RecyclerView parent, @NotNull RecyclerView.State state) {

                    if (parent.getChildAdapterPosition(view) == Objects.requireNonNull(parent.getAdapter()).getItemCount() - 1) {
                        outRect.bottom = spacing;
                    }
                    if (parent.getChildAdapterPosition(view) == 0) {
                        outRect.top = spacing;
                    }
                }
            });

其他解决方案是: 您可以将填充添加到 RecyclerView 的顶部和底部,并将 clipToPadding 属性设置为 false.

,而不是同时向顶部和底部项目添加填充。
<android.support.v7.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clipToPadding="false"
    android:paddingTop="8dp"
    android:paddingBottom="8dp" />