android gridview row dividers / separators

Question

Is there a way to show (horizontal) dividers between rows in a gridview?

I tried putting a small divider-image below every grid item, but this is not a solution, bec

Answer 1

Just wanted to share how I implemented this using the link accepted by OP. For my case I also needed to control the length of the separators, so I couldn't get around subclassing GridView.

public class HorizontalSeparatorGridView extends GridView {

    // Additional methods 

    @Override
    protected void dispatchDraw(Canvas canvas) {

        final int count = getChildCount();
        for(int i = 0; i < count; i++) {
            View child = getChildAt(i);
            int bottom = child.getBottom();
            int left = child.getLeft();
            int right = child.getRight();

            Paint paint = new Paint();
            paint.setColor(0xffececec);

            paint.setStrokeWidth(Math.round(0.5 * density));

            int offset = // Some offset

            canvas.drawLine(left + offset, bottom, right - offset, bottom, paint);
        }


        super.dispatchDraw(canvas);
    }

I subclassed dispatchDraw as opposed to onDraw just to be safe but I don't think it would matter in this case.

Answer 2

If you are using custom layout for grid items. Below code will work.

Step 1: Give background color to GridView

This is going to serve as a divider.
Give horizontalSpacing and verticalSpacing as 1dp
backgroundColor will be your divider color.

<GridView
        android:id="@+id/gridView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#e5e5e5"
        android:horizontalSpacing="1dp"
        android:numColumns="auto_fit"
        android:stretchMode="columnWidth"
        android:verticalSpacing="1dp" >

Step 2: Give background color to Custom Grid Item Layout

This is going to serve as a foreground color for GridItems.
In my case I kept it white (#fff)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    android:background="#fff"
    android:padding="15dp"
     >

    <ImageView
        android:id="@+id/icon"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:src="@drawable/ic_launcher_transparent" />

    <TextView
        android:id="@+id/lable"
        android:layout_marginTop="5dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Medium Text"
        android:textStyle="bold"
        android:textColor="#D0583B"
        android:textAppearance="?android:attr/textAppearanceSmall" />

</LinearLayout>

Result

Note:
If you do not want vertical separator, keep horizontalSpacing = 0dp
If you do not want horizontal separator, keep verticalSpacing = 0dp

Answer 3

I suggest doing the following:

`

    <TableRow
        android:id="@+id/tableRow1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="1sp"
        android:layout_marginLeft="7sp"
        android:layout_marginRight="7sp"
        android:layout_marginTop="7sp"
        android:background="@android:color/transparent">

        <TextView
            android:id="@+id/lblDeposit"
            android:layout_width="60sp"
            android:layout_height="40sp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="0sp"
            android:background="@drawable/rounded_top_left_rectangle"
            android:gravity="center"
            android:paddingLeft="5sp"
            android:scaleType="fitXY"
            android:text="Deposit"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="#000">
        </TextView>

        <TextView
            android:id="@+id/lblDepositvalue"
            android:layout_width="50sp"
            android:layout_height="40sp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="2sp"
            android:layout_marginRight="13sp"
            android:background="@drawable/rounded_top_right_rectangle"
            android:gravity="center_vertical|center_horizontal"
            android:scaleType="fitXY"
            android:text="40000/-Rs"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="#000">
        </TextView>
    </TableRow>

    <TableRow
        android:id="@+id/tableRow2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="6sp"
        android:layout_marginLeft="7sp"
        android:layout_marginRight="7sp"
        android:layout_marginTop="2sp"
        android:background="@android:color/transparent">

        <TextView
            android:id="@+id/lblPoints"
            android:layout_width="60sp"
            android:layout_height="40sp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="0sp"
            android:background="@drawable/rounded_bottom_right_rectangle"
            android:gravity="center"
            android:paddingLeft="5sp"
            android:scaleType="fitXY"
            android:text="Points "
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="#000">
        </TextView>

        <TextView
            android:id="@+id/lblPointsValue"
            android:layout_width="50sp"
            android:layout_height="40sp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="2sp"
            android:layout_marginRight="13sp"
            android:background="@drawable/rounded_bottom_left_rectangle"
            android:gravity="center_vertical|center_horizontal"
            android:scaleType="fitXY"
            android:text="20"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="#000">
        </TextView>
    </TableRow>
</TableLayout>`  

Answer 4

I ended up creating a custom gridview, something like this:

https://stackoverflow.com/a/9757501/1310343

using a background image that is exactly as high as one item in my gridview, and has a devider at the bottom.

Works like a charm!