Android Studio渲染问题 - textview

Question

我遇到渲染问题“无法找到以下类：”当我使用扩展TextView进行画布旋转和自定义字体时出现错误。

我有attrs.xml，方法中没有错误。

请帮帮我。

package com.calendar;


public class VerticalTextView extends View {
private TextPaint mTextPaint;
private String mText;
private int mAscent;
private Rect text_bounds = new Rect();

final static int DEFAULT_TEXT_SIZE = 15;

public VerticalTextView(Context context) {
    super(context);
    initLabelView();
}

public VerticalTextView(Context context, AttributeSet attrs,int defStyle) {
    super(context, attrs, defStyle);
    initLabelView();

    TypedArray a = context.obtainStyledAttributes(attrs,       R.styleable.VerticalLabelView);

    CharSequence s = a.getString(R.styleable.VerticalLabelView_text);
    if (s != null) setText(s.toString());

    setTextColor(a.getColor(R.styleable.VerticalLabelView_textColor, 0xFF000000));

    int textSize = a.getDimensionPixelOffset(R.styleable.VerticalLabelView_textSize, 0);
    if (textSize > 0) setTextSize(textSize);

    a.recycle();
}

private final void initLabelView() {
    mTextPaint = new TextPaint();
    mTextPaint.setAntiAlias(true);
    mTextPaint.setTextSize(DEFAULT_TEXT_SIZE);
    mTextPaint.setColor(0xFF000000);
    mTextPaint.setTextAlign(Paint.Align.CENTER);
    setPadding(3, 3, 3, 3);
}

public void setText(String text) {
    mText = text;
    requestLayout();
    invalidate();
}

public void setTextSize(int size) {
    mTextPaint.setTextSize(size);
    requestLayout();
    invalidate();
}

public void setTextColor(int color) {
    mTextPaint.setColor(color);
    invalidate();
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

    mTextPaint.getTextBounds(mText, 0, mText.length(), text_bounds);
    setMeasuredDimension(
            measureWidth(widthMeasureSpec),
            measureHeight(heightMeasureSpec));
}

private int measureWidth(int measureSpec) {
    int result = 0;
    int specMode = MeasureSpec.getMode(measureSpec);
    int specSize = MeasureSpec.getSize(measureSpec);

    if (specMode == MeasureSpec.EXACTLY) {
        // We were told how big to be
        result = specSize;
    } else {
        // Measure the text
        result = text_bounds.height() + getPaddingLeft() + getPaddingRight();

        if (specMode == MeasureSpec.AT_MOST) {
            // Respect AT_MOST value if that was what is called for by measureSpec
            result = Math.min(result, specSize);
        }
    }
    return result;
}

private int measureHeight(int measureSpec) {
    int result = 0;
    int specMode = MeasureSpec.getMode(measureSpec);
    int specSize = MeasureSpec.getSize(measureSpec);

    mAscent = (int) mTextPaint.ascent();
    if (specMode == MeasureSpec.EXACTLY) {
        // We were told how big to be
        result = specSize;
    } else {
        // Measure the text
        result = text_bounds.width() + getPaddingTop() + getPaddingBottom();

        if (specMode == MeasureSpec.AT_MOST) {
            // Respect AT_MOST value if that was what is called for by measureSpec
            result = Math.min(result, specSize);
        }
    }
    return result;
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    float text_horizontally_centered_origin_x = getPaddingLeft() +     text_bounds.width()/2f;
    float text_horizontally_centered_origin_y = getPaddingTop() - mAscent;

    canvas.translate(text_horizontally_centered_origin_y,     text_horizontally_centered_origin_x);
    canvas.rotate(-90);
    canvas.drawText(mText, 0, 0, mTextPaint);
    }
}

XML：

<resources>
<declare-styleable name="VerticalLabelView">
    <attr name="text" format="string" />
    <attr name="textColor" format="color" />
    <attr name="textSize" format="dimension" />
</declare-styleable>

</resources>