Java FontMetrics類代碼示例

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
private int fontSizeCompare(float sizeDp, int cols, int rows, int width, int height) {
	// read new metrics to get exact pixel dimensions
	defaultPaint.setTextSize((int) (sizeDp * this.displayDensity + 0.5f));
	FontMetrics fm = defaultPaint.getFontMetrics();

	float[] widths = new float[1];
	defaultPaint.getTextWidths("X", widths);
	int termWidth = (int) widths[0] * cols;
	int termHeight = (int) Math.ceil(fm.descent - fm.top) * rows;

	Log.d("fontsize", String.format("font size %fdp resulted in %d x %d", sizeDp, termWidth, termHeight));

	// Check to see if it fits in resolution specified.
	if (termWidth > width || termHeight > height)
		return 1;

	if (termWidth == width || termHeight == height)
		return 0;

	return -1;
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
/**
 * Constructs the generator and initializes the common members ignoring display density.
 *
 * @param iconWidthPx The width of the generated icon in pixels.
 * @param iconHeightPx The height of the generated icon in pixels.
 * @param cornerRadiusPx The radius of the corners in the icon in pixels.
 * @param backgroundColor Color at which the rounded rectangle should be drawn.
 * @param textSizePx Size at which the text should be drawn in pixels.
 */
public RoundedIconGenerator(int iconWidthPx, int iconHeightPx, int cornerRadiusPx,
        int backgroundColor, float textSizePx) {
    mIconWidthPx = iconWidthPx;
    mIconHeightPx = iconHeightPx;
    mCornerRadiusPx = cornerRadiusPx;

    mBackgroundRect = new RectF(0, 0, mIconWidthPx, mIconHeightPx);

    mBackgroundPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mBackgroundPaint.setColor(backgroundColor);

    mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
    mTextPaint.setColor(Color.WHITE);
    mTextPaint.setFakeBoldText(true);
    mTextPaint.setTextSize(textSizePx);

    FontMetrics textFontMetrics = mTextPaint.getFontMetrics();
    mTextHeight = (float) Math.ceil(textFontMetrics.bottom - textFontMetrics.top);
    mTextYOffset = -textFontMetrics.top;
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
private void init(){
    mWidth = (int) getPaint().measureText(getText().toString());
    FontMetrics fm = getPaint().getFontMetrics();
    mFontHeiht = (float)Math.ceil(fm.descent - fm.ascent);
    int horizontalPadding = getHorizontalPaddint();
    int verticalPadding = getVerticalPaddint();
    mPath.reset();
    mPath.moveTo(0, 0);
    mPath.lineTo(mWidth + horizontalPadding, 0);
    mPath.lineTo(mWidth + horizontalPadding, mFontHeiht + verticalPadding);
    mPath.lineTo(25, mFontHeiht + verticalPadding);
    mPath.lineTo(0, mFontHeiht+verticalPadding+25);
    mPath.close();
    
    mPaint.setAntiAlias(true);
    mPaint.setColor(Color.RED);
    mPaint.setStyle(Style.FILL);
    
    getPaint().setColor(Color.WHITE);// 不知道什麽原因，xml設置無效。暫時先在代碼中設置。
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
public TitleBar(Context context)
{
    super(context);
    
    BitmapFactory.Options opts = new BitmapFactory.Options();
    opts.inJustDecodeBounds = true;
    BitmapFactory.decodeResource(getResources(),  R.drawable.sys_title_bg_vertical, opts); 
    height = opts.outHeight;        

    setBackgroundResource(R.drawable.sys_title_bg_vertical);
    
    paint = new Paint();
    paint.setAntiAlias(true);
    paint.setColor(Color.WHITE);
    paint.setTextSize(24);
    FontMetrics fm = paint.getFontMetrics();
    
    yPostion = (height - fm.descent + fm.ascent) / 2  -  fm.ascent;
    
    mBusyIndicator = new ProgressBar(getContext());
    mBusyIndicator.setIndeterminate(true);
    //mBusyIndicator.setBackgroundResource(R.drawable.busy);
    addView(mBusyIndicator);
    mBusyIndicator.setVisibility(GONE);
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
private int fontSizeCompare(float size, int cols, int rows, int width, int height) {
	// read new metrics to get exact pixel dimensions
	defaultPaint.setTextSize(size);
	FontMetrics fm = defaultPaint.getFontMetrics();

	float[] widths = new float[1];
	defaultPaint.getTextWidths("X", widths);
	int termWidth = (int)widths[0] * cols;
	int termHeight = (int)Math.ceil(fm.descent - fm.top) * rows;

	Log.d("fontsize", String.format("font size %f resulted in %d x %d", size, termWidth, termHeight));

	// Check to see if it fits in resolution specified.
	if (termWidth > width || termHeight > height)
		return 1;

	if (termWidth == width || termHeight == height)
		return 0;

	return -1;
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
/**
 * 描述：繪製文本，支持換行.
 *
 * @param canvas the canvas
 * @param text the text
 * @param maxWPix the max w pix
 * @param paint the paint
 * @param left the left
 * @param top the top
 * @return the int
 */
public static int drawText(Canvas canvas,String text,int maxWPix,TextPaint paint,int left,int top) {
if(AbStrUtil.isEmpty(text)){
	return 1;
}
//需要根據文字長度控製換行
   //測量文字的長度
List<String> mStrList  = getDrawRowStr(text,maxWPix,paint);
    
    FontMetrics fm  = paint.getFontMetrics();
    int hSize = (int)Math.ceil(fm.descent - fm.ascent)+2;
    
    for(int i=0;i<mStrList.size();i++){
   	 //計算坐標
   	 int x = left;
        int y = top+hSize/2+hSize*i;
	 String textLine = mStrList.get(i);
        canvas.drawText(textLine,x,y, paint); 
        
    }
    return mStrList.size();
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
private void init(){
    mWidth = (int) getPaint().measureText(getText().toString());
    FontMetrics fm = getPaint().getFontMetrics();
    mFontHeiht = (float)Math.ceil(fm.descent - fm.ascent);
    int horizontalPadding = getHorizontalPaddint();
    int verticalPadding = getVerticalPaddint();
    mPath.reset();
    mPath.moveTo(0, 0);
    mPath.lineTo(mWidth + horizontalPadding, 0);
    mPath.lineTo(mWidth + horizontalPadding, mFontHeiht + verticalPadding);
    mPath.lineTo(25, mFontHeiht + verticalPadding);
    mPath.lineTo(0, mFontHeiht+verticalPadding+25);
    mPath.close();
    
    mPaint.setAntiAlias(true);
    mPaint.setColor(ResFinder.getColor("umeng_comm_topic_tip_bg"));
    mPaint.setStyle(Style.FILL);
    
    getPaint().setColor(Color.WHITE);// 不知道什麽原因，xml設置無效。暫時先在代碼中設置。
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
/**
 * Draw text.
 *
 * @param canvas the canvas
 * @param text the text
 * @param maxWPix the max w pix
 * @param paint the paint
 * @return the int
 */
public int drawText(Canvas canvas, String text, int maxWPix,
        TextPaint paint) {
    if (TextUtils.isEmpty(text)) {
        return 1;
    }
    // 需要根據文字長度控製換行
    // 測量文字的長度
    List<String> mStrList = getDrawRowStr(text, maxWPix, paint);

    FontMetrics fm = paint.getFontMetrics();
    int hSize = (int)Math.ceil(fm.descent - fm.ascent);

    for (int i = 0; i < mStrList.size(); i++) {
        // 計算坐標
        float x = leftPadding;
        float y = topPadding+hSize/2+i*(hSize+lineSpacing)+bottomPadding;
        String textLine = mStrList.get(i);
        if(i < maxLines){
            canvas.drawText(textLine, x, y, paint);
        }
    }
    return mStrList.size();
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
protected void drawLabel(Canvas canvas, String labelText, List<RectF> prevLabelsBounds, int centerX, int centerY,
            float shortRadius, float longRadius, float currentAngle, float angle, int left, int right, int color,
            Paint paint, boolean line, boolean showMoreLabel)
{

    LabelPoint labelPoint =
                drawLabelHandler(canvas, labelText, prevLabelsBounds, centerX, centerY, shortRadius, longRadius,
                            currentAngle, angle, left, right, color, paint, line);
    String[] texts = labelText.split("/");
    for (int index = 0; index < texts.length; index++)
    {
        canvas.drawText(texts[index], labelPoint.xLabel, labelPoint.yLabel, paint);
        FontMetrics fm = paint.getFontMetrics();
        labelPoint.yLabel = labelPoint.yLabel + Math.round(fm.descent - fm.top) + 2;
    }
    if (line)
    {
        prevLabelsBounds.add(new RectF(labelPoint.xLabel, labelPoint.yLabel, labelPoint.xLabel
                    + labelPoint.widthLabel, labelPoint.yLabel + labelPoint.size));
    }
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
/**
     * @see android.view.ViewGroup#dispatchDraw(Canvas)
     */
    @Override
    protected void dispatchDraw(Canvas canvas) {
        if (mState == STATE_REFRESHING) {
//
//            float centerX = mArrowImageView.getMeasuredWidth() / 2;
//            float centerY = mArrowImageView.getMeasuredHeight() / 2;
//            Matrix matrix = mArrowImageView.getImageMatrix();
//            mArrowImageView.setScaleType(ScaleType.MATRIX);
//            matrix.postRotate(25, centerX, centerY);
//            mArrowImageView.setImageMatrix(matrix);
        }
        super.dispatchDraw(canvas);
        if (isInEditMode()) {
            return;
        }
        FontMetrics fontMetrics = mPaint.getFontMetrics();
        // 計算文字高度
        float fontHeight = fontMetrics.bottom - fontMetrics.top;
        // 計算文字baseline
        float textBaseY = getHeight() - (getHeight() - fontHeight) / 2 - fontMetrics.bottom;
        canvas.drawText(mstrTitle, getWidth() / 2 + mArrowImageView.getMeasuredWidth(), textBaseY, mPaint);
    }
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
/**
 * 畫左右的Label
 *
 * @param canvas
 */
private void drawLabel(Canvas canvas) {
    canvas.save();
    int vh = getHeight();

    FontMetrics fontMetrics = paint.getFontMetrics();
    // 計算文字高度
    float fontHeight = fontMetrics.bottom - fontMetrics.top;
    // 計算文字baseline
    float y = PADDING + vh - (vh - fontHeight) / 2 - fontMetrics.bottom;

    if (!TextUtils.isEmpty(mRightLabel)) {
        canvas.drawText(mRightLabel, getWidth() - rightLabelLen / 2
                - PADDING, y, labelPaint);
    }
    if (!TextUtils.isEmpty(mLeftLabel)) {
        canvas.drawText(mLeftLabel, PADDING + leftLabelLen / 2, y,
                labelPaint);
    }

    canvas.restore();
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
private void initVariable() {
	mCirclePaint = new Paint();
	mCirclePaint.setAntiAlias(true);
	mCirclePaint.setColor(mCircleColor);
	mCirclePaint.setStyle(Paint.Style.FILL);
	
	mRingPaint = new Paint();
	mRingPaint.setAntiAlias(true);
	mRingPaint.setColor(mRingColor);
	mRingPaint.setStyle(Paint.Style.STROKE);
	mRingPaint.setStrokeWidth(mStrokeWidth);
	
	mTextPaint = new Paint();
	mTextPaint.setAntiAlias(true);
	mTextPaint.setStyle(Paint.Style.FILL);
	mTextPaint.setARGB(255, 255, 255, 255);
	mTextPaint.setTextSize(mRadius / 2);
	
	FontMetrics fm = mTextPaint.getFontMetrics();
	mTxtHeight = (int) Math.ceil(fm.descent - fm.ascent);
	
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
protected void onDraw(Canvas canvas){
		Paint paint = new Paint();
		paint.setStyle(Style.STROKE);
		paint.setAntiAlias(true);
		paint.setColor(0xffe9e9e9);
		paint.setTextSize(Function.getFitPx(getContext(), 30));
		FontMetrics fm = paint.getFontMetrics();
//		canvas.drawRect(drawRect, paint);
		canvas.drawLine(drawRect.left, drawRect.top, drawRect.right, drawRect.top, paint);
		canvas.drawLine(drawRect.left, drawRect.bottom, drawRect.right, drawRect.bottom, paint);
		float h = (maxValue - minValue) / 2;
		float y = Function.getYCoordinate(drawRect, minValue+h, maxValue, minValue);
		paint.setColor(0xffbbbbbc);
		canvas.drawLine(drawRect.left, y, drawRect.right, y, paint);
		paint.setTextAlign(Align.RIGHT);
		int baseline = (int) (drawRect.top + (drawRect.bottom - drawRect.top - fm.bottom + fm.top) / 2 - fm.top); 
		canvas.drawText("0%", drawRect.left-Function.getFitPx(getContext(), 20), baseline, paint);
		paint.setColor(getContext().getResources().getColor(R.color.font_de3031));			
		canvas.drawText("3.4%", drawRect.left-Function.getFitPx(getContext(), 20), drawRect.top-(fm.top-fm.bottom)/2 + 2, paint);
		paint.setColor(getContext().getResources().getColor(R.color.font_32a632));			
		canvas.drawText("-3.4%", drawRect.left-Function.getFitPx(getContext(), 20), drawRect.bottom, paint);
	}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
@Override
protected void onDraw(Canvas canvas)
{
    Paint mPaint = getPaint();
    
    //Get font's height & leading:
    FontMetrics fm = mPaint.getFontMetrics();
    float height = fm.descent - fm.ascent + fm.leading;
    
    float x = 0;
    float y = height;
    String[] textLines = autoSplit(getText().toString(), mPaint, getWidth());
    for (String textLine : textLines)
    {
        canvas.drawText(textLine, x, y, mPaint);
        y += height;
    }
}
 

import android.graphics.Paint.FontMetrics; //導入依賴的package包/類
/**
 * Request a different font size. Will make call to parentChanged() to make
 * sure we resize PTY if needed.
 *
 * @param sizeDp Size of font in dp
 */
private final void setFontSize(float sizeDp) {
	if (sizeDp <= 0.0) {
		return;
	}

	final int fontSizePx = (int) (sizeDp * this.displayDensity + 0.5f);

	defaultPaint.setTextSize(fontSizePx);
	fontSizeDp = sizeDp;

	// read new metrics to get exact pixel dimensions
	FontMetrics fm = defaultPaint.getFontMetrics();
	charTop = (int) Math.ceil(fm.top);

	float[] widths = new float[1];
	defaultPaint.getTextWidths("X", widths);
	charWidth = (int) Math.ceil(widths[0]);
	charHeight = (int) Math.ceil(fm.descent - fm.top);

	// refresh any bitmap with new font size
	if (parent != null) {
		parentChanged(parent);
	}

	for (FontSizeChangedListener ofscl : fontSizeChangedListeners) {
		ofscl.onFontSizeChanged(sizeDp);
	}

	host.setFontSize((int) sizeDp);
	manager.hostdb.saveHost(host);

	forcedSize = false;
}