/**
 * Space is a lightweight View subclass that may be used to create gaps between components
 * in general purpose layouts.
 */
public final class Space extends View {
    /**
     * {@inheritDoc}
     */
    public Space(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        if (getVisibility() == VISIBLE) {
            setVisibility(INVISIBLE);
        }
    }

    /**
     * {@inheritDoc}
     */
    public Space(Context context, AttributeSet attrs, int defStyleAttr) {
        this(context, attrs, defStyleAttr, 0);
    }

    /**
     * {@inheritDoc}
     */
    public Space(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    /**
     * {@inheritDoc}
     */
    public Space(Context context) {
        //noinspection NullableProblems
        this(context, null);
    }

    /**
     * Draw nothing.
     *
     * @param canvas an unused parameter.
     */
    @Override
    public void draw(Canvas canvas) {
    }

    /**
     * Compare to: {@link View#getDefaultSize(int, int)}
     * If mode is AT_MOST, return the child size instead of the parent size
     * (unless it is too big).
     */
    private static int getDefaultSize2(int size, int measureSpec) {
        int result = size;
        int specMode = MeasureSpec.getMode(measureSpec);
        int specSize = MeasureSpec.getSize(measureSpec);

        switch (specMode) {
            case MeasureSpec.UNSPECIFIED:
                result = size;
                break;
            case MeasureSpec.AT_MOST:
                result = Math.min(size, specSize);
                break;
            case MeasureSpec.EXACTLY:
                result = specSize;
                break;
        }
        return result;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        setMeasuredDimension(
                getDefaultSize2(getSuggestedMinimumWidth(), widthMeasureSpec),
                getDefaultSize2(getSuggestedMinimumHeight(), heightMeasureSpec));
    }
}
 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/lightgray"
    android:divider="@drawable/divider"
    android:orientation="vertical"
    android:showDividers="beginning|end|middle">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="?android:actionBarSize"
        android:background="@color/white"
        android:drawableLeft="@drawable/ic_personal_invitation"
        android:drawablePadding="@dimen/left_margin"
        android:drawableRight="@drawable/icon_message_more"
        android:gravity="center_vertical"
        android:padding="@dimen/left_margin"
        android:text="未完成事項"
        android:textSize="@dimen/common_text_size_36" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="?android:actionBarSize"
        android:background="@color/white"
        android:drawableLeft="@drawable/ic_personal_notice"
        android:drawablePadding="@dimen/left_margin"
        android:drawableRight="@drawable/icon_message_more"
        android:gravity="center_vertical"
        android:padding="@dimen/left_margin"
        android:text="未完成事項"
        android:textSize="@dimen/common_text_size_36" />


    <Space
        android:layout_width="match_parent"
        android:layout_height="20dp"
        android:background="@color/black" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="?android:actionBarSize"
        android:background="@color/white"
        android:drawableLeft="@drawable/ic_personal_opinion"
        android:drawablePadding="@dimen/left_margin"
        android:drawableRight="@drawable/icon_message_more"
        android:gravity="center_vertical"
        android:padding="@dimen/left_margin"
        android:text="檢查更新"
        android:textSize="@dimen/common_text_size_36" />

</LinearLayout>