android.text.Layout#getDesiredWidth ( )源码实例Demo

下面列出了android.text.Layout#getDesiredWidth ( ) 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。

源代码1 项目： TextPathView 文件： SyncTextPathView.java

@Override
protected void initPath() {
    mDst.reset();
    mFontPath.reset();

    if (!TextUtils.isEmpty(mText)) {
        //获取宽高
        mTextWidth = Layout.getDesiredWidth(mText, mTextPaint);
        Paint.FontMetrics metrics = mTextPaint.getFontMetrics();
        mTextHeight = metrics.bottom - metrics.top;

        mTextPaint.getTextPath(mText, 0, mText.length(), 0, -metrics.ascent, mFontPath);
        mPathMeasure.setPath(mFontPath, false);
        mLengthSum = mPathMeasure.getLength();
        //获取所有路径的总长度
        while (mPathMeasure.nextContour()) {
            mLengthSum += mPathMeasure.getLength();
        }
    }

}

源代码2 项目： TextPathView 文件： AsyncTextPathView.java

@Override
protected void initPath() {
    mDst.reset();
    mFontPath.reset();

    if (!TextUtils.isEmpty(mText)) {
        //获取宽高
        mTextWidth = Layout.getDesiredWidth(mText, mTextPaint);
        Paint.FontMetrics metrics = mTextPaint.getFontMetrics();
        mTextHeight = metrics.bottom - metrics.top;

        mTextPaint.getTextPath(mText, 0, mText.length(), 0f, -metrics.ascent, mFontPath);
        mPathMeasure.setPath(mFontPath, false);
        mLength = mPathMeasure.getLength();
    }

}

源代码3 项目： Virtualview-Android 文件： TMReminderTagsView.java

public void setTags(String[] tags) {
    if (tags != null && this.tags != tags) {
        this.tags = tags;
        tagsWidth = 0;
        tagsHeight = (int) ((textFontMetrics.descent - textFontMetrics.ascent) + 0.5f);
        this.eachTagWidth = new int[tags.length];
        for (int i = 0; i < tags.length; i++) {
            int tagWdith = (int) (Layout.getDesiredWidth(tags[i] != null ? tags[i] : "", textPaint) + 0.5f) + 2 * hPadding;
            eachTagWidth[i] = tagWdith;
            tagsWidth += tagWdith;
            if (i < tags.length - 1) {
                tagsWidth += tagsGap;
            }
        }
        requestLayout();
        invalidate();
    }
}

源代码4 项目： delion 文件： WebappUrlBar.java

/**
 * Show the end of the URL rather than the beginning.
 */
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft,
        int oldTop, int oldRight, int oldBottom) {
    Layout layout = mUrlBar.getLayout();
    if (layout == null) return;

    // Android doesn't account for the compound Drawable in its width calculations, leading to
    // improper scrolling and even Android improperly placing the horizontal fade in its
    // TextView calculation.  Get around it by calculating that width manually: crbug.com/303908
    int urlBarWidth = mUrlBar.getWidth();
    int iconWidth =
            mCurrentIconResource == 0 ? 0 : mIconResourceWidths.get(mCurrentIconResource);
    int availableTextWidth = urlBarWidth - iconWidth;
    int desiredWidth = (int) Layout.getDesiredWidth(layout.getText(), layout.getPaint());

    if (desiredWidth > availableTextWidth) {
        mUrlBar.scrollTo(desiredWidth - availableTextWidth, 0);
    } else {
        mUrlBar.scrollTo(0, 0);
    }
}

源代码5 项目： AndroidChromium 文件： WebappUrlBar.java

/**
 * Show the end of the URL rather than the beginning.
 */
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft,
        int oldTop, int oldRight, int oldBottom) {
    Layout layout = mUrlBar.getLayout();
    if (layout == null) return;

    // Android doesn't account for the compound Drawable in its width calculations, leading to
    // improper scrolling and even Android improperly placing the horizontal fade in its
    // TextView calculation.  Get around it by calculating that width manually: crbug.com/303908
    int urlBarWidth = mUrlBar.getWidth();
    int iconWidth =
            mCurrentIconResource == 0 ? 0 : mIconResourceWidths.get(mCurrentIconResource);
    int availableTextWidth = urlBarWidth - iconWidth;
    int desiredWidth = (int) Layout.getDesiredWidth(layout.getText(), layout.getPaint());

    if (desiredWidth > availableTextWidth) {
        mUrlBar.scrollTo(desiredWidth - availableTextWidth, 0);
    } else {
        mUrlBar.scrollTo(0, 0);
    }
}

源代码6 项目： 365browser 文件： WebappUrlBar.java

/**
 * Show the end of the URL rather than the beginning.
 */
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft,
        int oldTop, int oldRight, int oldBottom) {
    Layout layout = mUrlBar.getLayout();
    if (layout == null) return;

    // Android doesn't account for the compound Drawable in its width calculations, leading to
    // improper scrolling and even Android improperly placing the horizontal fade in its
    // TextView calculation.  Get around it by calculating that width manually: crbug.com/303908
    int urlBarWidth = mUrlBar.getWidth();
    int iconWidth =
            mCurrentIconResource == 0 ? 0 : mIconResourceWidths.get(mCurrentIconResource);
    int availableTextWidth = urlBarWidth - iconWidth;
    int desiredWidth = (int) Layout.getDesiredWidth(layout.getText(), layout.getPaint());

    if (desiredWidth > availableTextWidth) {
        mUrlBar.scrollTo(desiredWidth - availableTextWidth, 0);
    } else {
        mUrlBar.scrollTo(0, 0);
    }
}

源代码7 项目： kAndroid 文件： MeiTextPathView.java

/**
 * 初始化文字路径
 */
private void initTextPath() {
    mPathLength = 0;
    mFontPath.reset();
    mDstPath.reset();

    if (null == mText || mText.equals("")) {
        mText = "mei_s";
    }
    mTextWidth = Layout.getDesiredWidth(mText, mPaint);
    Paint.FontMetrics metrics = mPaint.getFontMetrics();
    mTextHeight = metrics.bottom - metrics.top;

    mPaint.getTextPath(mText, 0, mText.length(), 0, -metrics.ascent, mFontPath);
    mPathMeasure.setPath(mFontPath, false);

    mPathLength = mPathMeasure.getLength();
    while (mPathMeasure.nextContour()) {
        mPathLength += mPathMeasure.getLength();
    }

    if (mAutoStart) {
        post(new Runnable() {
            @Override
            public void run() {
                startAnimation();
            }
        });
    }
}

源代码8 项目： ThermometerView 文件： ThermometerView.java

public void initConfig() {
    if (minThermometerRadius >= maxThermometerRadius) {
        throw new UnsupportedOperationException("温度计形状设置有误。");
    }
    if (minMercuryRadius >= maxMercuryRadius || minMercuryRadius >= minThermometerRadius) {
        throw new UnsupportedOperationException("水银形状设置有误。");
    }
    if (minScaleValue >= maxScaleValue) {
        throw new UnsupportedOperationException("刻度值设置不正确");
    }
    setResetCurValue(curScaleValue);

    sumScaleValue = (maxScaleValue - minScaleValue) * 10;

    mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);

    mLinePaint = new Paint();
    mLinePaint.setAntiAlias(true);
    mLinePaint.setStyle(Paint.Style.FILL);
    mLinePaint.setStrokeWidth(scaleLineWidth);

    mPaint = new Paint();
    mPaint.setAntiAlias(true);
    mPaint.setStyle(Paint.Style.FILL);

    String title = "℃";
    mTextPaint.setTextSize(unitTextSize);
    textWidth = Layout.getDesiredWidth(title, mTextPaint);
    Paint.FontMetricsInt fmi = mTextPaint.getFontMetricsInt();
    titleHeight = -(float) (fmi.bottom + fmi.top);

    this.setLayerType(View.LAYER_TYPE_SOFTWARE, null); // 关闭硬件加速，否则阴影无效
}

源代码9 项目： ucar-weex-core 文件： WXTextDomObject.java

/** package **/ float getTextWidth(TextPaint textPaint,float outerWidth, boolean forceToDesired) {
  float textWidth;
  if (forceToDesired) {
    textWidth = outerWidth;
  } else {
    float desiredWidth = Layout.getDesiredWidth(spanned, textPaint);
    if (CSSConstants.isUndefined(outerWidth) || desiredWidth < outerWidth) {
      textWidth = desiredWidth;
    } else {
      textWidth = outerWidth;
    }
  }
  return textWidth;
}

源代码10 项目： FastTextView 文件： SingleLineTextView.java

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  if (mLayout == null && !TextUtils.isEmpty(mText)) {
    BoringLayout.Metrics fm = new BoringLayout.Metrics();
    fm.width = (int) Layout.getDesiredWidth(mText, mTextPaint);
    mLayout = BoringLayout.make(mText, mTextPaint, MeasureSpec.getSize(widthMeasureSpec),
        TextViewAttrsHelper.getLayoutAlignment(this, getGravity()), mAttrsHelper.mSpacingMultiplier, mAttrsHelper.mSpacingAdd, fm, true);
  }
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}

源代码11 项目： revolution-irc 文件： AlignToPointSpan.java

public static CharSequence apply(TextView textView, CharSequence text) {
    if (text == null || !(text instanceof Spannable))
        return text;
    Spannable s = (Spannable) text;
    for (AlignToPointSpan span : s.getSpans(0, text.length(),
            AlignToPointSpan.class)) {
        span.mMargin = (int) Layout.getDesiredWidth(text, 0, s.getSpanStart(span.mAnchor),
                textView.getPaint());
    }
    return text;
}

源代码12 项目： weex-uikit 文件： WXTextDomObject.java

/** package **/ float getTextWidth(TextPaint textPaint,float outerWidth, boolean forceToDesired) {
  float textWidth;
  if (forceToDesired) {
    textWidth = outerWidth;
  } else {
    float desiredWidth = Layout.getDesiredWidth(spanned, textPaint);
    if (CSSConstants.isUndefined(outerWidth) || desiredWidth < outerWidth) {
      textWidth = desiredWidth;
    } else {
      textWidth = outerWidth;
    }
  }
  return textWidth;
}

源代码13 项目： zone-sdk 文件： ExpandTextView.java

/**
 * 得到最多行那个 最后一个字符的位置，与第一个位置 测出宽度 与 扩展字符 相加 如果大于行宽， 就把endPos--，知道小于。
 * 最后 截取字符  0-endPos 然后拼接  扩展字符 去显示即可！
 */
private void setExpand() {
    calExpand = true;
    Layout layout = getLayout();
    int endPos = layout.getLineEnd(maxLine - 1);
    int startPos = layout.getLineStart(maxLine - 1);
    TextPaint pt = getPaint();

    //如果宽度>测量宽度 就继续 --
    while (Layout.getDesiredWidth(getText(), startPos, endPos, pt) + Layout.getDesiredWidth(new SpannedString(EXPAND), pt) > layout.getWidth()
            && --endPos > startPos) {
    }
    SpannableStringBuilder nowSb = new SpannableStringBuilder(getText().subSequence(0, endPos)).append(EXPAND);
    setText(nowSb);
}

源代码14 项目： Android_Skin_2.0 文件： NumberProgressBar.java

private RectF generateTextRectF() {
	FontMetrics fontMetrics = mTextPaint.getFontMetrics();
	final float height = fontMetrics.bottom - fontMetrics.top;

	String text = generateText();
	final float width = Layout.getDesiredWidth(text, mTextPaint) + 2 * mTextLRPad;

	return new RectF(0, 0, width, height);
}

源代码15 项目： VideoOS-Android-SDK 文件： TextUtil.java

/**
 * 改变外框大小，适应文字
 * 如果当前文字只有一行，则缩到外框适应文字大小
 * 如果文字有多行，则宽度不变，缩小高度到适应文字大小
 * 文字外框的位置不变
 *
 * @param view
 */
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public static void adjustSize(TextView view) {
    if (view != null && view.getLayoutParams() != null) {
        /*
        //更好的实现方式，但是ios那边不支持这种方式
        ViewGroup.LayoutParams layoutParams = view.getLayoutParams();
        layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT;
        layoutParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
        view.setLayoutParams(layoutParams);*/

        // 废弃的实现方式，使用WRAP_CONTENT最简单，且这种方式算出来的width有bug
        // @Deprecated
        /*int lineCount = Math.min(view.getLineCount(), getMaxLines(view));
        int width, height;
        if (lineCount > 1) {//多行，宽度不变，改变高度
            width = view.getWidth();
            height = view.getLineHeight() * lineCount + view.getPaddingTop() + view.getPaddingBottom();
        } else {//一行，改变宽度&高度
             Paint paint = view.getPaint();
            width = (int) paint.measureText(view.getText().toString()) + view.getPaddingLeft() + view.getPaddingRight();
            height = view.getLineHeight() + view.getPaddingTop() + view.getPaddingBottom();
        }*/

        int lineCount = Math.min(view.getLineCount(), getMaxLines(view));
        float width, height;
        if (lineCount > 1) {//多行，宽度不变，改变高度
            width = view.getWidth();
            height = view.getLineHeight() * lineCount + view.getPaddingTop() + view.getPaddingBottom();
        } else {//一行，改变宽度&高度
            width = view.getPaddingLeft() + Layout.getDesiredWidth(view.getText(), view.getPaint()) + view.getPaddingRight();
            height = view.getLineHeight() + view.getPaddingTop() + view.getPaddingBottom();
        }

        if (view.getLayoutParams() != null) {
            ViewGroup.LayoutParams layoutParams = view.getLayoutParams();
            layoutParams.width = (int) width;
            layoutParams.height = (int) height;
            view.setLayoutParams(layoutParams);
        }
    }
}

源代码16 项目： reflow-animator 文件： ReflowTextAnimatorHelper.java

private static int getSectionWidth(@Nonnull Layout layout, int sectionStart, int sectionEnd) {
    CharSequence text = layout.getText();
    TextPaint paint = layout.getPaint();

    return (int) Layout.getDesiredWidth(text, sectionStart, sectionEnd, paint);
}

源代码17 项目： xmpp 文件： WheelView.java

/**
 * Calculates control width and creates text layouts
 * 
 * @param widthSize
 *            the input layout width
 * @param mode
 *            the layout mode
 * @return the calculated control width
 */
private int calculateLayoutWidth(int widthSize, int mode) {
	initResourcesIfNecessary();

	int width = widthSize;

	int maxLength = getMaxTextLength();
	if (maxLength > 0) {
		float textWidth = Layout.getDesiredWidth("0",
				itemsPaint);
		itemsWidth = (int) (maxLength * textWidth);
	} else {
		itemsWidth = 0;
	}
	itemsWidth += ADDITIONAL_ITEMS_SPACE; // make it some more

	labelWidth = 0;
	if (label != null && label.length() > 0) {
		labelWidth = (int)Layout.getDesiredWidth(label,
				valuePaint);
	}

	boolean recalculate = false;
	if (mode == MeasureSpec.EXACTLY) {
		width = widthSize;
		recalculate = true;
	} else {
		width = itemsWidth + labelWidth + 2 * PADDING;
		if (labelWidth > 0) {
			width += LABEL_OFFSET;
		}

		// Check against our minimum width
		width = Math.max(width, getSuggestedMinimumWidth());

		if (mode == MeasureSpec.AT_MOST && widthSize < width) {
			width = widthSize;
			recalculate = true;
		}
	}

	if (recalculate) {
		// recalculate width
		int pureWidth = width - LABEL_OFFSET - 2 * PADDING;
		if (pureWidth <= 0) {
			itemsWidth = labelWidth = 0;
		}
		if (labelWidth > 0) {
			double newWidthItems = (double) itemsWidth * pureWidth
					/ (itemsWidth + labelWidth);
			itemsWidth = (int) newWidthItems;
			labelWidth = pureWidth - itemsWidth;
		} else {
			itemsWidth = pureWidth + LABEL_OFFSET; // no label
		}
	}

	if (itemsWidth > 0) {
		createLayouts(itemsWidth, labelWidth);
	}

	return width;
}

源代码18 项目： Aria 文件： StringUtil.java

/**
 * 获取字体长度
 */
public static int getTextLen(TextView textView) {
  TextPaint paint = textView.getPaint();
  return (int) Layout.getDesiredWidth(textView.getText().toString(), 0,
      textView.getText().length(), paint);
}

源代码19 项目： TokenAutoComplete 文件： CountSpan.java

float getCountTextWidthForPaint(TextPaint paint) {
    return Layout.getDesiredWidth(countText, 0, countText.length(), paint);
}