public class LinedEditText extends EditText {
private Paint linePaint;
private float margin;
private int paperColor;
private Rect mRect;
public LinedEditText(Context paramContext, AttributeSet paramAttributeSet) {
super(paramContext, paramAttributeSet);
mRect = new Rect();
linePaint = new Paint();
}
protected void onDraw(Canvas paramCanvas) {
paramCanvas.drawColor(this.paperColor);
Rect r = mRect;
int lineCount = getLineCount();
int height = getHeight();
int lineHeight = getLineHeight();
int m = 1 + height / lineHeight;
if (lineCount < m)
lineCount = m;
int n = getLineBounds(0, r);
paramCanvas.drawLine(0.0F, n, getRight(), n, this.linePaint);
for (int i = 0;; i++) {
if (i >= lineCount) {
setPadding(10 + (int) this.margin, 0, 0, 0);
super.onDraw(paramCanvas);
paramCanvas.restore();
return;
}
n += lineHeight;
paramCanvas.drawLine(0.0F, n, getRight(), n, this.linePaint);
paramCanvas.save();
}
}
}
效果图如下：
