canvas.DrawText让文字真正居中显示

来源：互联网发布：福州seo服务编辑：程序博客网时间：2024/05/21 08:35

canvas.drawColor(getResources().getColor(R.color.colorPrimary));        super.onDraw(canvas);        float x = this.getX();        float y = this.getY();        int w = this.getWidth();        int h = this.getHeight();        Log.e("x", String.valueOf(x));        Log.e("y", String.valueOf(y));        Log.e("x+w/2", String.valueOf(x + w / 2));        Log.e("y+h/2", String.valueOf(y + h / 2));        Paint paint = new Paint();        Rect rect = new Rect();        paint.setTextAlign(Paint.Align.LEFT);//        paint.setColor(getResources().getColor(R.color.white));        paint.getTextBounds("click to scale", 0 , "click to scale".length(), rect);        paint.setAntiAlias(true);

Paint.FontMetrics metricsInt = paint.getFontMetrics();//        canvas.drawText("click to scale",(getMeasuredWidth() - rect.width()) / 2,(getMeasuredHeight() - metricsInt.descent - metricsInt.ascent) / 2,paint);        /**        * because param y is not the text show in center,but the baseline ,so we must set the baseline instead of text to display in center        * */        canvas.drawText("click to scale",(getMeasuredWidth() - rect.width()) / 2,(getMeasuredHeight() - (metricsInt.descent + metricsInt.ascent)) / 2,paint);

参考：http://blog.csdn.net/lovexieyuan520/article/details/43153275

源码下载：git@github.com:edwinsnao/AnimationDemo.git

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