带上下分割线的 LinearLayout

BorderLinearLayout.java

package com.parkingwang.widget;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.LinearLayout;

import com.parkingwang.app.R;

/**
 * 带边界线的LinearLayout
 *
 * @author Geek_Soledad (msdx.android@qq.com)
 * @version 2015-11-12
 * @since 2015-11-12
 */
public class BorderLinearLayout extends LinearLayout {
    private static final int TOP = 0x1;
    private static final int BOTTOM = 0x2;

    private int mBorder;
    private int mBorderWidth;
    private int mBorderColor;
    private final Paint mPaint;

    public BorderLinearLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.BorderLinearLayout);
        mBorder = a.getInt(R.styleable.BorderLinearLayout_pwBorder, 0);
        mBorderWidth = a.getDimensionPixelSize(R.styleable.BorderLinearLayout_pwBorderWidth, 1);
        mBorderColor = a.getColor(R.styleable.BorderLinearLayout_pwBorderColor, getResources().getColor(R.color.divider));
        a.recycle();

        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mPaint.setColor(mBorderColor);
        mPaint.setStyle(Paint.Style.FILL);
        invalidate();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if ((mBorder & TOP) > 0) {
            canvas.drawRect(0, 0, getWidth(), mBorderWidth, mPaint);
        }
        if ((mBorder & BOTTOM) > 0) {
            canvas.drawRect(0, getHeight() - mBorderWidth, getWidth(), getHeight(), mPaint);
        }
    }
}