本文介绍了在画布上绘制垂直文本的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想了解如何在画布上绘制垂直文本。对不起,也许愚蠢的问题,但我解决不了这个问题。我可以这样做:
I would like to learn how to draw vertical text on the canvas. Sorry for maybe stupid question, but I can not solve this problem. I can do so:
if (i ==10)
{
this_str2 = "0.00";
}
canvas.save();
canvas.rotate(-90,190,90);
canvas.drawText(this_str2, x_guide +50, drawSizes[1] + drawSizes[3] - (i * drawSizes[3] / 10) +20, paint);
canvas.restore();
}
但它未正确显示在X和Y是任何其他的解决这个问题7
But it is not properly displayed on the X and Y is any other solution to this problem 7
推荐答案
试试这个习俗TextView的,我不记得我了,如果从(在这里计算器),如果任何人记得,请张贴在评论链接
Try this custom textview, I don't remember where I took if from (here in StackOverflow), if any one remembers, please post a link in the comments.
import android.content.Context;
import android.graphics.Canvas;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.view.Gravity;
import android.widget.TextView;
public class VerticalTextView extends TextView
{
final boolean topDown;
public VerticalTextView(Context context, AttributeSet attrs)
{
super(context, attrs);
final int gravity = getGravity();
if (Gravity.isVertical(gravity) && (gravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM)
{
setGravity((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) | Gravity.TOP);
topDown = false;
}
else
topDown = true;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
super.onMeasure(heightMeasureSpec, widthMeasureSpec);
setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
}
@Override
protected void onDraw(Canvas canvas)
{
TextPaint textPaint = getPaint();
textPaint.setColor(getCurrentTextColor());
textPaint.drawableState = getDrawableState();
canvas.save();
if (topDown)
{
canvas.translate(getWidth(), 0);
canvas.rotate(90);
}
else
{
canvas.translate(0, getHeight());
canvas.rotate(-90);
}
canvas.translate(getCompoundPaddingLeft(), getExtendedPaddingTop());
getLayout().draw(canvas);
canvas.restore();
}
}
这篇关于在画布上绘制垂直文本的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!