CustomLayout.java

public class OptionLayout extends LinearLayout
{
	@InjectView(R.id.title)
	TextView title;

	@InjectView(R.id.summary)
	TextView summary;

	@InjectView(R.id.content)
	ViewGroup content;
	private Paint paint = new Paint();

	public OptionLayout(Context context)
	{
		this(context, null);
	}

	public OptionLayout(Context context, AttributeSet attrs)
	{
		this(context, attrs, R.attr.optionLayoutStyle);
	}

	public OptionLayout(Context context, AttributeSet attrs, int defStyleAttr)
	{
		super(context, attrs, defStyleAttr);
		init(context, attrs, defStyleAttr);
		setWillNotDraw(false);
	}

	private void init(Context context, AttributeSet attrs, int defStyleAttr)
	{
		final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.OptionLayout, defStyleAttr, 0);
		String titleAttr = a.getString(R.styleable.OptionLayout_android_title);
		String summaryAttr = a.getString(R.styleable.OptionLayout_android_summary);

		inflate(getContext(), R.layout.option_layout, this);
		ButterKnife.inject(this);

		title.setText(titleAttr);
		summary.setText(summaryAttr);

		a.recycle();
	}

	public void setTitle(String title)
	{
		this.title.setText(title);
	}

	@Override
	public void addView(@NonNull final View child, int index, ViewGroup.LayoutParams params)
	{
		if (content == null)
		{
			super.addView(child, index, params);
		}
		else
		{
			content.addView(child, index, params);
			// Propagate click event to the last child view.
			setOnClickListener(new OnClickListener()
			{
				@Override
				public void onClick(View v)
				{
					child.performClick();
				}
			});
		}
	}

	@Override
	protected void onDraw(Canvas canvas)
	{
		super.onDraw(canvas);
		paint.setColor(android.graphics.Color.RED);
		paint.setStrokeWidth(20);
		canvas.drawLine(0, this.getHeight() - 1, this.getWidth() - 1,
				this.getHeight() - 1, paint);
	}
}