下面列出了android.text.TextPaint#getTextWidths ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
private static int getTextWidth(@Nullable final CharSequence text, final TextPaint paint) {
if (TextUtils.isEmpty(text)) {
return 0;
}
final int length = text.length();
final float[] widths = new float[length];
final int count;
final Typeface savedTypeface = paint.getTypeface();
try {
paint.setTypeface(getTextTypeface(text));
count = paint.getTextWidths(text, 0, length, widths);
} finally {
paint.setTypeface(savedTypeface);
}
int width = 0;
for (int i = 0; i < count; i++) {
width += Math.round(widths[i] + 0.5f);
}
return width;
}
private static int getTextWidth(@Nullable final CharSequence text, final TextPaint paint) {
if (TextUtils.isEmpty(text)) {
return 0;
}
final int length = text.length();
final float[] widths = new float[length];
final int count;
final Typeface savedTypeface = paint.getTypeface();
try {
paint.setTypeface(getTextTypeface(text));
count = paint.getTextWidths(text, 0, length, widths);
} finally {
paint.setTypeface(savedTypeface);
}
int width = 0;
for (int i = 0; i < count; i++) {
width += Math.round(widths[i] + 0.5f);
}
return width;
}
private static int getTextWidth(@Nullable final CharSequence text, final TextPaint paint) {
if (TextUtils.isEmpty(text)) {
return 0;
}
final int length = text.length();
final float[] widths = new float[length];
final int count;
final Typeface savedTypeface = paint.getTypeface();
try {
paint.setTypeface(getTextTypeface(text));
count = paint.getTextWidths(text, 0, length, widths);
} finally {
paint.setTypeface(savedTypeface);
}
int width = 0;
for (int i = 0; i < count; i++) {
width += Math.round(widths[i] + 0.5f);
}
return width;
}
private static float getTextWidth(final String text, final TextPaint paint) {
if (TextUtils.isEmpty(text)) {
return 0.0f;
}
final int len = text.length();
final float[] widths = new float[len];
final int count = paint.getTextWidths(text, 0, len, widths);
float width = 0;
for (int i = 0; i < count; i++) {
width += widths[i];
}
return width;
}
private static float getTextWidth(final String text, final TextPaint paint) {
if (TextUtils.isEmpty(text)) {
return 0.0f;
}
final int len = text.length();
final float[] widths = new float[len];
final int count = paint.getTextWidths(text, 0, len, widths);
float width = 0;
for (int i = 0; i < count; i++) {
width += widths[i];
}
return width;
}
/**
* 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 get the width of the replacement and the
* remaining characters will get 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) {
// Jota Text Editor
// MetricAffectingSpan[] spans =
// text.getSpans(start, end, MetricAffectingSpan.class);
//
// ReplacementSpan replacement = null;
workPaint.set(paint);
//
// for (int i = 0; i < spans.length; i++) {
// MetricAffectingSpan span = spans[i];
// 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;
}
private static float getTextWidth(final String text, final TextPaint paint) {
if (TextUtils.isEmpty(text)) {
return 0.0f;
}
final int len = text.length();
final float[] widths = new float[len];
final int count = paint.getTextWidths(text, 0, len, widths);
float width = 0;
for (int i = 0; i < count; i++) {
width += widths[i];
}
return width;
}
private static float getTextWidth(final String text, final TextPaint paint) {
if (TextUtils.isEmpty(text)) {
return 0.0f;
}
final int len = text.length();
final float[] widths = new float[len];
final int count = paint.getTextWidths(text, 0, len, widths);
float width = 0;
for (int i = 0; i < count; i++) {
width += widths[i];
}
return width;
}
/**
* 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 get the width of the replacement and the
* remaining characters will get 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) {
// Jota Text Editor
// MetricAffectingSpan[] spans =
// text.getSpans(start, end, MetricAffectingSpan.class);
//
// ReplacementSpan replacement = null;
workPaint.set(paint);
//
// for (int i = 0; i < spans.length; i++) {
// MetricAffectingSpan span = spans[i];
// 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;
}
private static float getTextWidth(final String text, final TextPaint paint) {
if (TextUtils.isEmpty(text)) {
return 0.0f;
}
final int len = text.length();
final float[] widths = new float[len];
final int count = paint.getTextWidths(text, 0, len, widths);
float width = 0;
for (int i = 0; i < count; i++) {
width += widths[i];
}
return width;
}
private Bitmap createSelectedChip(final RecipientEntry contact,final TextPaint paint)
{
// Ellipsize the text so that it takes AT MOST the entire width of the
// autocomplete text entry area. Make sure to leave space for padding
// on the sides.
final int height=(int)mChipHeight;
final int deleteWidth=height;
final float[] widths=new float[1];
paint.getTextWidths(" ",widths);
final String createChipDisplayText=createChipDisplayText(contact);
final float calculateAvailableWidth=calculateAvailableWidth();
final CharSequence ellipsizedText=ellipsizeText(createChipDisplayText,paint,calculateAvailableWidth-deleteWidth-widths[0]);
// Make sure there is a minimum chip width so the user can ALWAYS
// tap a chip without difficulty.
final int width=Math.max(deleteWidth*2,(int)Math.floor(paint.measureText(ellipsizedText,0,ellipsizedText.length()))+mChipPadding*2+deleteWidth);
// Create the background of the chip.
final Bitmap tmpBitmap=Bitmap.createBitmap(width,height,Bitmap.Config.ARGB_8888);
final Canvas canvas=new Canvas(tmpBitmap);
if(mChipBackgroundPressed!=null)
{
mChipBackgroundPressed.setBounds(0,0,width,height);
mChipBackgroundPressed.draw(canvas);
paint.setColor(sSelectedTextColor);
// Vertically center the text in the chip.
canvas.drawText(ellipsizedText,0,ellipsizedText.length(),mChipPadding,getTextYOffset((String)ellipsizedText,paint,height),paint);
// Make the delete a square.
final Rect backgroundPadding=new Rect();
mChipBackgroundPressed.getPadding(backgroundPadding);
mChipDelete.setBounds(width-deleteWidth+backgroundPadding.left,0+backgroundPadding.top,width-backgroundPadding.right,height-backgroundPadding.bottom);
mChipDelete.draw(canvas);
}
else Log.w(TAG,"Unable to draw a background for the chips as it was never set");
return tmpBitmap;
}
private Bitmap createChipBitmap(RecipientEntry contact, TextPaint paint, Bitmap icon,
Drawable background) {
if (background == null) {
Log.w(TAG, "Unable to draw a background for the chips as it was never set");
return Bitmap.createBitmap(
(int) mChipHeight * 2, (int) mChipHeight, Bitmap.Config.ARGB_8888);
}
Rect backgroundPadding = new Rect();
background.getPadding(backgroundPadding);
// Ellipsize the text so that it takes AT MOST the entire width of the
// autocomplete text entry area. Make sure to leave space for padding
// on the sides.
int height = (int) mChipHeight + getResources().getDimensionPixelSize(R.dimen.extra_chip_height);
// Since the icon is a square, it's width is equal to the maximum height it can be inside
// the chip.
int iconWidth = height - backgroundPadding.top - backgroundPadding.bottom;
float[] widths = new float[1];
paint.getTextWidths(" ", widths);
CharSequence ellipsizedText = ellipsizeText(createChipDisplayText(contact), paint,
calculateAvailableWidth() - iconWidth - widths[0] - backgroundPadding.left
- backgroundPadding.right);
int textWidth = (int) paint.measureText(ellipsizedText, 0, ellipsizedText.length());
// Make sure there is a minimum chip width so the user can ALWAYS
// tap a chip without difficulty.
int width = Math.max(iconWidth * 2, textWidth + (mChipPadding * 2) + iconWidth
+ backgroundPadding.left + backgroundPadding.right);
// Create the background of the chip.
Bitmap tmpBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(tmpBitmap);
// Draw the background drawable
background.setBounds(height / 2, 0, width, height);
background.draw(canvas);
// Draw the text vertically aligned
int textX = shouldPositionAvatarOnRight() ?
mChipPadding + backgroundPadding.left :
width - backgroundPadding.right - mChipPadding - textWidth;
paint.setColor(0xFF5C5C5C);
paint.setAntiAlias(true);
canvas.drawText(ellipsizedText, 0, ellipsizedText.length(),
textX, getTextYOffset(ellipsizedText.toString(), paint, height), paint);
if (icon != null) {
// Draw the icon
icon = ChipsUtil.getClip(icon);
int iconX = shouldPositionAvatarOnRight() ?
width - backgroundPadding.right - iconWidth :
backgroundPadding.left;
RectF src = new RectF(0, 0, icon.getWidth(), icon.getHeight());
RectF dst = new RectF(0, 0, height, height);
drawIconOnCanvas(icon, canvas, paint, src, dst);
}
return tmpBitmap;
}
private Bitmap createChipBitmap(RecipientEntry contact, TextPaint paint, Bitmap icon,
Drawable background) {
if (background == null) {
Log.w(TAG, "Unable to draw a background for the chips as it was never set");
return Bitmap.createBitmap(
(int) mChipHeight * 2, (int) mChipHeight, Bitmap.Config.ARGB_8888);
}
Rect backgroundPadding = new Rect();
background.getPadding(backgroundPadding);
// Ellipsize the text so that it takes AT MOST the entire width of the
// autocomplete text entry area. Make sure to leave space for padding
// on the sides.
int height = (int) mChipHeight;
// Since the icon is a square, it's width is equal to the maximum height it can be inside
// the chip.
int iconWidth = height - backgroundPadding.top - backgroundPadding.bottom;
float[] widths = new float[1];
paint.getTextWidths(" ", widths);
CharSequence ellipsizedText = ellipsizeText(createChipDisplayText(contact), paint,
calculateAvailableWidth() - iconWidth - widths[0] - backgroundPadding.left
- backgroundPadding.right);
int textWidth = (int) paint.measureText(ellipsizedText, 0, ellipsizedText.length());
// Make sure there is a minimum chip width so the user can ALWAYS
// tap a chip without difficulty.
// int width = Math.max(iconWidth * 2, textWidth + (mChipPadding * 2) + iconWidth
// + backgroundPadding.left + backgroundPadding.right);
int width = mIconPadding + icon.getWidth() + textWidth + mFontPadding * 2;
// Create the background of the chip.
Bitmap tmpBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(tmpBitmap);
// Draw the background drawable
background.setBounds(0, 0, width, height);
background.draw(canvas);
// Draw the text vertically aligned
paint.setColor(0xFF5C5C5C);
paint.setAntiAlias(true);
Paint.FontMetrics fontMetrics = paint.getFontMetrics();
float textY = height / 2 - fontMetrics.descent + (fontMetrics.descent - fontMetrics.ascent) / 2;
getTextYOffset(ellipsizedText.toString(), paint, height);
canvas.drawText(ellipsizedText, 0, ellipsizedText.length(),
mIconPadding + icon.getWidth() + mFontPadding, textY, paint);
if (icon != null) {
// Draw the icon
canvas.drawBitmap(icon, mIconPadding, mChipHeight / 2 - icon.getHeight() / 2, paint);
}
return tmpBitmap;
}
private Bitmap createUnselectedChip(final RecipientEntry contact,final TextPaint paint,final boolean leaveBlankIconSpacer)
{
// Ellipsize the text so that it takes AT MOST the entire width of the
// autocomplete text entry area. Make sure to leave space for padding
// on the sides.
final int height=(int)mChipHeight;
int iconWidth=height;
final float[] widths=new float[1];
paint.getTextWidths(" ",widths);
final float availableWidth=calculateAvailableWidth();
final String chipDisplayText=createChipDisplayText(contact);
final CharSequence ellipsizedText=ellipsizeText(chipDisplayText,paint,availableWidth-iconWidth-widths[0]);
// Make sure there is a minimum chip width so the user can ALWAYS
// tap a chip without difficulty.
final int width=Math.max(iconWidth*2,(int)Math.floor(paint.measureText(ellipsizedText,0,ellipsizedText.length()))+mChipPadding*2+iconWidth);
// Create the background of the chip.
final Bitmap tmpBitmap=Bitmap.createBitmap(width,height,Bitmap.Config.ARGB_8888);
final Canvas canvas=new Canvas(tmpBitmap);
final Drawable background=getChipBackground(contact);
if(background!=null)
{
background.setBounds(0,0,width,height);
background.draw(canvas);
// Don't draw photos for recipients that have been typed in OR generated on the fly.
final long contactId=contact.getContactId();
final boolean drawPhotos=isPhoneQuery() ? contactId!=RecipientEntry.INVALID_CONTACT : contactId!=RecipientEntry.INVALID_CONTACT&&contactId!=RecipientEntry.GENERATED_CONTACT&&!TextUtils.isEmpty(contact.getDisplayName());
if(drawPhotos)
{
byte[] photoBytes=contact.getPhotoBytes();
// There may not be a photo yet if anything but the first contact address
// was selected.
if(photoBytes==null&&contact.getPhotoThumbnailUri()!=null)
{
// TODO: cache this in the recipient entry?
getAdapter().fetchPhoto(contact,contact.getPhotoThumbnailUri());
photoBytes=contact.getPhotoBytes();
}
Bitmap photo;
if(photoBytes!=null)
photo=BitmapFactory.decodeByteArray(photoBytes,0,photoBytes.length);
else // TODO: can the scaled down default photo be cached?
photo=mDefaultContactPhoto;
// Draw the photo on the left side.
if(photo!=null)
{
final RectF src=new RectF(0,0,photo.getWidth(),photo.getHeight());
final Rect backgroundPadding=new Rect();
mChipBackground.getPadding(backgroundPadding);
final RectF dst=new RectF(width-iconWidth+backgroundPadding.left,0+backgroundPadding.top,width-backgroundPadding.right,height-backgroundPadding.bottom);
final Matrix matrix=new Matrix();
matrix.setRectToRect(src,dst,Matrix.ScaleToFit.FILL);
canvas.drawBitmap(photo,matrix,paint);
}
}
else if(!leaveBlankIconSpacer||isPhoneQuery())
iconWidth=0;
paint.setColor(getContext().getResources().getColor(android.R.color.black));
// Vertically center the text in the chip.
canvas.drawText(ellipsizedText,0,ellipsizedText.length(),mChipPadding,getTextYOffset((String)ellipsizedText,paint,height),paint);
}
else Log.w(TAG,"Unable to draw a background for the chips as it was never set");
return tmpBitmap;
}