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  • EditView变形 使得每行都有一个下划线

     1     /**
    2 * A custom EditText that draws lines between each line of text that is displayed.
    3 * 这是一个自定义的EditView被画很多行再每两行的中间
    4 */
    5 public static class LinedEditText extends EditText {
    6 /*
    7 * 一个是矩形 一个是装绘 主要显示画图的样式
    8 */
    9 private Rect mRect;
    10 private Paint mPaint;
    11
    12 // we need this constructor for LayoutInflater
    13 /*
    14 * 构造函数
    15 */
    16 public LinedEditText(Context context, AttributeSet attrs) {
    17 super(context, attrs);
    18
    19 mRect = new Rect();
    20 mPaint = new Paint();
    21 mPaint.setStyle(Paint.Style.STROKE);
    22 mPaint.setColor(0x8FF00FF);
    23 }
    24 /**
    25 * 这个是具体的画法
    26 *
    27 * (non-Javadoc)
    28 * @see android.widget.TextView#onDraw(android.graphics.Canvas)
    29 */
    30 @Override
    31 protected void onDraw(Canvas canvas) {
    32 int count = getLineCount();
    33 Rect r = mRect;
    34 Paint paint = mPaint;
    35
    36 for (int i = 0; i < count; i++) {
    37 int baseline = getLineBounds(i, r);
    38
    39 canvas.drawLine(r.left, baseline + 1, r.right, baseline + 1, paint);
    40 }
    41
    42 super.onDraw(canvas);
    43 }
    44 }

    关键就是找到他的基准线然后再canvas上面画出来就行

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  • 原文地址:https://www.cnblogs.com/Acmen/p/2206966.html
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