Custom LinearLayout takes max measured width of all children for its width.

MaxLinearLayout.java

/**
 * @author kakajika
 * @since 2016/04/27
 */
public class MaxLinearLayout extends LinearLayout {

    public MaxLinearLayout(Context context) {
        super(context);
    }

    public MaxLinearLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MaxLinearLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int maxWidth = 0;
        for (int i=0; i<getChildCount(); ++i) {
            View child = getChildAt(i);
            child.measure(
                    MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
                    MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)
            );
            maxWidth = Math.max(maxWidth, child.getMeasuredWidth());
        }
        widthMeasureSpec = MeasureSpec.makeMeasureSpec(maxWidth, MeasureSpec.getMode(widthMeasureSpec));
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
}

usage.xml

<com.labo.kaji.MaxLinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

        <Space
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"/>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </LinearLayout>

</com.labo.kaji.MaxLinearLayout>