EditView变形 使得每行都有一个下划线

    /**
     * A custom EditText that draws lines between each line of text that is displayed.
     * 这是一个自定义的EditView被画很多行再每两行的中间
     */
    public static class LinedEditText extends EditText {
        /*
         * 一个是矩形  一个是装绘  主要显示画图的样式
         */
        private Rect mRect;
        private Paint mPaint;

        // we need this constructor for LayoutInflater
        /*
         * 构造函数
         */
        public LinedEditText(Context context, AttributeSet attrs) {
            super(context, attrs);
            
            mRect = new Rect();
            mPaint = new Paint();
            mPaint.setStyle(Paint.Style.STROKE);
            mPaint.setColor(0x8FF00FF);
        }
        /**
         * 这个是具体的画法
         * 
         * (non-Javadoc)
         * @see android.widget.TextView#onDraw(android.graphics.Canvas)
         */
        @Override
        protected void onDraw(Canvas canvas) {
            int count = getLineCount();
            Rect r = mRect;
            Paint paint = mPaint;

            for (int i = 0; i < count; i++) {
                int baseline = getLineBounds(i, r);

                canvas.drawLine(r.left, baseline + 1, r.right, baseline + 1, paint);
            }

            super.onDraw(canvas);
        }
    }

关键就是找到他的基准线然后再canvas上面画出来就行