Java TextPaint.getTextSize方法代碼示例

import android.text.TextPaint; //導入方法依賴的package包/類
@Override
public void updateDrawState(TextPaint paint) {
    paint.setStyle(Paint.Style.FILL);
    Shader shader = new LinearGradient(0, 0, 0, paint.getTextSize() * colors.length, colors, null,
            Shader.TileMode.MIRROR);
    Matrix matrix = new Matrix();
    matrix.setRotate(angle);
    shader.setLocalMatrix(matrix);
    paint.setShader(shader);
}
 

import android.text.TextPaint; //導入方法依賴的package包/類
private void drawMultilineText(Canvas canvas, String text, float x, float y, TextPaint paint, Layout.Alignment aligment) {
    final float lineHeight = paint.getTextSize();
    float lineY = y;
    for (CharSequence line : text.split("\n")) {
        canvas.save();
        {
            final float lineWidth = (int) paint.measureText(line.toString());
            float lineX = x;
            if (aligment == Layout.Alignment.ALIGN_CENTER) {
                lineX -= lineWidth / 2f;
            }
            if (lineX < 0) {
                lineX = 0;
            }

            final float right = lineX + lineWidth;
            if (right > canvas.getWidth()) {
                lineX = canvas.getWidth() - lineWidth - settings.paddingCorners;
            }

            canvas.translate(lineX, lineY);
            final StaticLayout staticLayout = new StaticLayout(line, paint, (int) lineWidth, aligment, 1.0f, 0, false);
            staticLayout.draw(canvas);

            lineY += lineHeight;
        }
        canvas.restore();
    }

}
 

import android.text.TextPaint; //導入方法依賴的package包/類
/**
 * Resize the text size with specified width and height
 * @param width
 * @param height
 */
public void resizeText(int width, int height) {
    CharSequence text = getText();
    // Do not resize if the view does not have dimensions or there is no text
    if (text == null || text.length() == 0 || height <= 0 || width <= 0 || mTextSize == 0) {
        return;
    }

    if (getTransformationMethod() != null) {
        text = getTransformationMethod().getTransformation(text, this);
    }

    // Get the text view's paint object
    TextPaint textPaint = getPaint();

    // Store the current text size
    float oldTextSize = textPaint.getTextSize();
    // If there is a max text size set, use the lesser of that and the default text size
    float targetTextSize = mMaxTextSize > 0 ? Math.min(mTextSize, mMaxTextSize) : mTextSize;

    // Get the required text height
    int textHeight = getTextHeight(text, textPaint, width, targetTextSize);

    // Until we either fit within our text view or we had reached our min text size, incrementally try smaller sizes
    while (textHeight > height && targetTextSize > mMinTextSize) {
        targetTextSize = Math.max(targetTextSize - 2, mMinTextSize);
        textHeight = getTextHeight(text, textPaint, width, targetTextSize);
    }

    // If we had reached our minimum text size and still don't fit, append an ellipsis
    if (mAddEllipsis && targetTextSize == mMinTextSize && textHeight > height) {
        // Draw using a static layout
        // modified: use a copy of TextPaint for measuring
        TextPaint paint = new TextPaint(textPaint);
        // Draw using a static layout
        StaticLayout layout = new StaticLayout(text, paint, width, Alignment.ALIGN_NORMAL, mSpacingMult, mSpacingAdd, false);
        // Check that we have a least one line of rendered text
        if (layout.getLineCount() > 0) {
            // Since the line at the specific vertical position would be cut off,
            // we must trim up to the previous line
            int lastLine = layout.getLineForVertical(height) - 1;
            // If the text would not even fit on a single line, clear it
            if (lastLine < 0) {
                setText("");
            }
            // Otherwise, trim to the previous line and add an ellipsis
            else {
                int start = layout.getLineStart(lastLine);
                int end = layout.getLineEnd(lastLine);
                float lineWidth = layout.getLineWidth(lastLine);
                float ellipseWidth = textPaint.measureText(mEllipsis);

                // Trim characters off until we have enough room to draw the ellipsis
                while (width < lineWidth + ellipseWidth) {
                    lineWidth = textPaint.measureText(text.subSequence(start, --end + 1).toString());
                }
                setText(text.subSequence(0, end) + mEllipsis);
            }
        }
    }

    // Some devices try to auto adjust line spacing, so force default line spacing
    // and invalidate the layout as a side effect
    setTextSize(TypedValue.COMPLEX_UNIT_PX, targetTextSize);
    setLineSpacing(mSpacingAdd, mSpacingMult);

    // Notify the listener if registered
    if (mTextResizeListener != null) {
        mTextResizeListener.onTextResize(this, oldTextSize, targetTextSize);
    }

    // Reset force resize flag
    mNeedsResize = false;
}
 

import android.text.TextPaint; //導入方法依賴的package包/類
/**
 * Resize the text size with specified width and height
 * @param width
 * @param height
 */
public void resizeText(int width, int height) {
	CharSequence text = getText();
	// Do not resize if the view does not have dimensions or there is no text
	if (text == null || text.length() == 0 || height <= 0 || width <= 0 || mTextSize == 0) {
		return;
	}

	if (getTransformationMethod() != null) {
		text = getTransformationMethod().getTransformation(text, this);
	}

	// Get the text view's paint object
	TextPaint textPaint = getPaint();

	// Store the current text size
	float oldTextSize = textPaint.getTextSize();
	// If there is a max text size set, use the lesser of that and the default text size
	float targetTextSize = mMaxTextSize > 0 ? Math.min(mTextSize, mMaxTextSize) : mTextSize;

	// Get the required text height
	int textHeight = getTextHeight(text, textPaint, width, targetTextSize);

	// Until we either fit within our text view or we had reached our min text size, incrementally try smaller sizes
	while (textHeight > height && targetTextSize > mMinTextSize) {
		targetTextSize = Math.max(targetTextSize - 2, mMinTextSize);
		textHeight = getTextHeight(text, textPaint, width, targetTextSize);
	}

	// If we had reached our minimum text size and still don't fit, append an ellipsis
	if (mAddEllipsis && targetTextSize == mMinTextSize && textHeight > height) {
		// Draw using a static layout
		// modified: use a copy of TextPaint for measuring
		TextPaint paint = new TextPaint(textPaint);
		// Draw using a static layout
		StaticLayout layout = new StaticLayout(text, paint, width, Layout.Alignment.ALIGN_NORMAL, mSpacingMult, mSpacingAdd, false);
		// Check that we have a least one line of rendered text
		if (layout.getLineCount() > 0) {
			// Since the line at the specific vertical position would be cut off,
			// we must trim up to the previous line
			int lastLine = layout.getLineForVertical(height) - 1;
			// If the text would not even fit on a single line, clear it
			if (lastLine < 0) {
				setText("");
			}
			// Otherwise, trim to the previous line and add an ellipsis
			else {
				int start = layout.getLineStart(lastLine);
				int end = layout.getLineEnd(lastLine);
				float lineWidth = layout.getLineWidth(lastLine);
				float ellipseWidth = textPaint.measureText(mEllipsis);

				// Trim characters off until we have enough room to draw the ellipsis
				while (width < lineWidth + ellipseWidth) {
					lineWidth = textPaint.measureText(text.subSequence(start, --end + 1).toString());
				}
				setText(text.subSequence(0, end) + mEllipsis);
			}
		}
	}

	// Some devices try to auto adjust line spacing, so force default line spacing
	// and invalidate the layout as a side effect
	setTextSize(TypedValue.COMPLEX_UNIT_PX, targetTextSize);
	setLineSpacing(mSpacingAdd, mSpacingMult);

	// Notify the listener if registered
	if (mTextResizeListener != null) {
		mTextResizeListener.onTextResize(this, oldTextSize, targetTextSize);
	}

	// Reset force resize flag
	mNeedsResize = false;
}
 

import android.text.TextPaint; //導入方法依賴的package包/類
private float calculateTextMultilineHeight(String text, TextPaint textPaint) {
    return text.split("\n").length * textPaint.getTextSize();
}