public static synchronized float glyphWidth(char glyph, String metricString, TextPaint paint) {
if (!mCache.containsKey(metricString)) {
mCache.put(metricString, new HashMap<Character, Float>());
}
Map<Character, Float> map = mCache.get(metricString);
if (!map.containsKey(glyph)) {
char[] glyphs = new char[] {glyph};
float[] widths = new float[1];
paint.getTextWidths(glyphs, 0, 1, widths);
map.put(glyph, widths[0]);
return widths[0];
}
return map.get(glyph);
}
private void init(Context context, AttributeSet attrs) {
mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
mTextPaint.setStyle(Paint.Style.FILL);
mTextPaint.setTextAlign(Paint.Align.LEFT);
mSpacing = new float[1];
mTextPaint.getTextWidths(new char[] {' '}, 0, 1, mSpacing);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.IconicLabelView);
setIcon(a.getDrawable(R.styleable.IconicLabelView_label_icon));
setBackground(a.getColor(R.styleable.IconicLabelView_bg_color, -1));
setCornerRadius(a.getFloat(R.styleable.IconicLabelView_corner_radius, 5.0f));
setTextColor(a.getColor(R.styleable.IconicLabelView_text_color, -1));
setTextSize(a.getDimensionPixelSize(R.styleable.IconicLabelView_text_size, 14));
setTexts(
a.getString(R.styleable.IconicLabelView_text1),
a.getString(R.styleable.IconicLabelView_text2));
a.recycle();
}
/**
* Returns the advance widths for a uniform left-to-right run of text with no style changes in the
* middle of the run. If any style is replacement text, the first character will isCancelled the
* width of the replacement and the remaining characters will isCancelled a width of 0.
*
* @param paint the paint, will not be modified
* @param workPaint a paint to modify; on return will reflect the original paint plus the effect
* of all spans on the run
* @param text the text
* @param start the start of the run
* @param end the limit of the run
* @param widths array to receive the advance widths of the characters. Must be at least a large
* as (end - start).
* @param fmi FontMetrics information; can be null
* @return the actual number of widths returned
*/
public static int getTextWidths(
TextPaint paint,
TextPaint workPaint,
Spanned text,
int start,
int end,
float[] widths,
Paint.FontMetricsInt fmi) {
MetricAffectingSpan[] spans = text.getSpans(start, end, MetricAffectingSpan.class);
ReplacementSpan replacement = null;
workPaint.set(paint);
for (MetricAffectingSpan span : spans) {
if (span instanceof ReplacementSpan) {
replacement = (ReplacementSpan) span;
} else {
span.updateMeasureState(workPaint);
}
}
if (replacement == null) {
workPaint.getFontMetricsInt(fmi);
workPaint.getTextWidths(text, start, end, widths);
} else {
int wid = replacement.getSize(workPaint, text, start, end, fmi);
if (end > start) {
widths[0] = wid;
for (int i = start + 1; i < end; i++) {
widths[i - start] = 0;
}
}
}
return end - start;
}
