笔记本样式的EditText控件(每行均带下划虚线)

package com.zongyi.trip.ui;

import com.zongyi.trip.R;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.DashPathEffect;
import android.graphics.Paint;
import android.graphics.PathEffect;
import android.util.AttributeSet;
import android.widget.EditText;

@SuppressLint({ "ResourceAsColor", "DrawAllocation" })
public class LinedEditText extends EditText {
//    private Paint mPaint = new Paint();

    public LinedEditText(Context context) {
        super(context);
        initPaint();
    }

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

    public LinedEditText(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        initPaint();
    }

    private void initPaint() {
//        mPaint.setStyle(Paint.Style.STROKE);
////        mPaint.setColor(0x80000000);
//    	mPaint.setStyle(Paint.Style.STROKE);
//    	mPaint.setColor(R.color.dashed_line_color);
//        PathEffect effects = new DashPathEffect(new float[]{5,5,5,5},1);
//        mPaint.setPathEffect(effects);
    }

    @Override protected void onDraw(Canvas canvas) {
    	Paint mPaint = new Paint();
//       mPaint.setColor(0x80000000);
    	mPaint.setStyle(Paint.Style.STROKE);
    	mPaint.setColor(Color.LTGRAY);
    	PathEffect effects = new DashPathEffect(new float[]{5,5,5,5},5);
      mPaint.setPathEffect(effects);

        int left = getLeft();
        int right = getRight();
        int paddingTop = getPaddingTop();
        int paddingBottom = getPaddingBottom();
        int paddingLeft = getPaddingLeft();
        int paddingRight = getPaddingRight();
        int height = getHeight();
        int lineHeight = getLineHeight();
        int spcingHeight = (int) getLineSpacingExtra();
        int count = (height-paddingTop-paddingBottom) / lineHeight;

        for (int i = 0; i < count; i++) {
            int baseline = lineHeight * (i+1) + paddingTop - spcingHeight/2 ;
            canvas.drawLine(left+paddingLeft, baseline, right-paddingRight, baseline, mPaint);
        }

        super.onDraw(canvas);
    }
}

 <com.zongyi.trip.ui.LinedEditText
            android:id="@+id/edittext_message"
            android:layout_width="fill_parent"
            android:layout_height="200dp"
            android:lineSpacingExtra="15dp"
            android:gravity="top"
            android:textColor="#ACB6BB"
            android:textSize="18sp" />