android.text.Layout.getLineStart()方法的使用及代码示例

x33g5p2x  于2022-01-23 转载在 其他  
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本文整理了Java中android.text.Layout.getLineStart()方法的一些代码示例，展示了Layout.getLineStart()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Layout.getLineStart()方法的具体详情如下：
包路径：android.text.Layout
类名称：Layout
方法名：getLineStart

Layout.getLineStart介绍

暂无

代码示例

代码示例来源：origin: hanks-zyh/HTextView

@Override
  protected void drawFrame(Canvas canvas) {
    Layout layout = mHTextView.getLayout();
    int gapIndex = 0;
    for (int i = 0; i < layout.getLineCount(); i++) {
      int lineStart = layout.getLineStart(i);
      int lineEnd = layout.getLineEnd(i);
      float lineLeft = layout.getLineLeft(i);
      float lineBaseline = layout.getLineBaseline(i);
      String lineText = mText.subSequence(lineStart, lineEnd).toString();
      for (int c = 0; c < lineText.length(); c++) {
        int alpha = alphaList.get(gapIndex);
        mPaint.setAlpha((int) ((255 - alpha) * progress + alpha));
        canvas.drawText(String.valueOf(lineText.charAt(c)), lineLeft, lineBaseline, mPaint);
        lineLeft += gapList.get(gapIndex++);
      }
    }
  }
}

代码示例来源：origin: facebook/litho

float start = getHorizontal(mLayout.getLineStart(line), line);

代码示例来源：origin: seven332/EhViewer

int linebot = layout.getLineForVertical(areabot);
int first = layout.getLineStart(linetop);
int last = layout.getLineEnd(linebot);

代码示例来源：origin: weexteam/weex-hackernews

lastLineStart = layout.getLineStart(mNumberOfLines - 1);
lastLineEnd = layout.getLineEnd(mNumberOfLines - 1);
if (lastLineStart < lastLineEnd) {

代码示例来源：origin: FolioReader/FolioReader-Android

@Override
  protected void onDraw(Canvas canvas) {
    int count = getLineCount();

    final Layout layout = getLayout();
    float xStart, xStop, xDiff;
    int firstCharInLine, lastCharInLine;

    for (int i = 0; i < count; i++) {
      int baseline = getLineBounds(i, mRect);
      firstCharInLine = layout.getLineStart(i);
      lastCharInLine = layout.getLineEnd(i);

      xStart = layout.getPrimaryHorizontal(firstCharInLine);
      xDiff = layout.getPrimaryHorizontal(firstCharInLine + 1) - xStart;
      xStop = layout.getPrimaryHorizontal(lastCharInLine - 1) + xDiff;

      canvas.drawLine(xStart,
          baseline + mStrokeWidth,
          xStop,
          baseline + mStrokeWidth,
          mPaint);
    }

    super.onDraw(canvas);
  }
}

代码示例来源：origin: stackoverflow.com

int lineStart = layout.getLineStart(line);
int lineEnd = layout.getLineEnd(line);
int lineLength = lineEnd - lineStart;

代码示例来源：origin: lovejjfg/PowerText

private int getMoreLength(Layout layout, int moreLength, CharSequence mText) {
  int lastLine = mDefaultLineCount - 1;
  moreLength++;
  CharSequence newText =
    mText.subSequence(layout.getLineStart(lastLine), layout.getLineEnd(lastLine) - moreLength);
  while (getPaint().measureText(newText + "..." + mMoreHint) > layout.getWidth()) {
    moreLength++;
    newText = mText.subSequence(layout.getLineStart(lastLine), layout.getLineEnd(lastLine) - moreLength);
  }
  return moreLength;
}

代码示例来源：origin: blurpy/kouchat-android

/**
 * Gets the text on the given line from the full text of a textview.
 *
 * @param fullText The full text from a textview.
 * @param lineNumber The line number in the textview to get the text from.
 * @param layout The layout of the textview.
 * @return The text found on the given line.
 */
public static String getLineOfText(final String fullText, final int lineNumber, final Layout layout) {
  final int lineStart = layout.getLineStart(lineNumber);
  final int lineEnd = layout.getLineEnd(lineNumber);
  return fullText.substring(lineStart, lineEnd);
}

代码示例来源：origin: stackoverflow.com

Selection getParagraphs(EditText editor) {    
  Layout layout = new Layout( editor.getEditableText() );

  int selStart = editor.getSelectionStart();
  int selEnd = editor.getSelectionEnd();

  int firstLine = layout.getLineForOffset(selStart);
  int end = selStart == selEnd ? selEnd : selEnd - 1; 
  int lastLine = layout.getLineForOffset(end);

  return new Selection(layout.getLineStart(firstLine), layout.getLineEnd(lastLine));
}

代码示例来源：origin: ZhangQinhao/MONKOVEL

@Override
  public void subscribe(ObservableEmitter<List<String>> e) throws Exception {
    TextPaint mPaint = (TextPaint) mView.getPaint();
    mPaint.setSubpixelText(true);
    Layout tempLayout = new StaticLayout(paragraphstr, mPaint, mView.getContentWidth(), Layout.Alignment.ALIGN_NORMAL, 0, 0, false);
    List<String> linesdata = new ArrayList<String>();
    for (int i = 0; i < tempLayout.getLineCount(); i++) {
      linesdata.add(paragraphstr.substring(tempLayout.getLineStart(i), tempLayout.getLineEnd(i)));
    }
    e.onNext(linesdata);
    e.onComplete();
  }
});

代码示例来源：origin: stackoverflow.com

TextView tv = new TextView(context);
 ViewTreeObserver vto = tv.getViewTreeObserver();
 vto.addOnGlobalLayoutListener(
     new ViewTreeObserver.OnGlobalLayoutListener() {
       @Override
       public void onGlobalLayout() {
         Layout l = tv.getLayout();
         int height = tv.getHeight();
         int scrollY = tv.getScrollY();
         /**
          * Key part
          */
         int lineCount = l.getLineForVertical(height + scrollY);
         int start = l.getLineStart(0);
         int end = l.getLineEnd(lineCount - 1);
         /**
          * Cut string
          */
         String s = tv.getText().toString().substring(start, end);
       }
     }
 );

代码示例来源：origin: ahmadaghazadeh/CodeEditor

private int getLineNumberAtPoint(int y) {
  int i = topLayoutLine;
  while (i <= bottomLayoutLine) {
    int lineBound = (mEditor.getLineBounds(i, null) - mEditor.getScrollY()) + 4;
    int lineHeight = mEditor.getLineHeight();
    if (y >= lineBound || y <= lineBound - lineHeight) {
      i++;
    } else {
      return lineNumbers.getLineForIndex(mEditor.getLayout().getLineStart(i));
    }
  }
  return -1;
}

代码示例来源：origin: stackoverflow.com

public boolean moveDown(Layout layout) {
   int start = myTextbox.getSelectionStart();
   int end = myTextbox.getSelectionEnd();
   if (start != end) {
     int min = Math.min(start, end);
     int max = Math.max(start, end);
     myTextbox.setSelection(max);
     if (min == 0 && max == myTextbox.length()) {
       return false;
     }
     return true;
   } else {
     int line = layout.getLineForOffset(end);
     if (line < layout.getLineCount() - 1) {
       int move;
       if (layout.getParagraphDirection(line) ==
         layout.getParagraphDirection(line + 1)) {
         float h = layout.getPrimaryHorizontal(end);
         move = layout.getOffsetForHorizontal(line + 1, h);
       } else {
         move = layout.getLineStart(line + 1);
       }
       myTextbox.setSelection(move);
       return true;
     }
   }
   return false;
 }

代码示例来源：origin: stackoverflow.com

final Layout layout = editText.getLayout();
final int line = layout.getLineForOffset(editText.getSelectionStart());
final int start = layout.getLineStart(line);
final int end = layout.getLineEnd(line);
editText.getEditableText().setSpan(new EasyEditSpan(), start, end,

代码示例来源：origin: luhaoaimama1/zone-sdk

/**
 * 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);
}

代码示例来源：origin: geniusgithub/AndroidDialer

protected boolean up(TextView widget, Spannable buffer) {
  if (DBG) {
    Log.d(LOG_TAG, "--- up:");
  }
  Layout layout = widget.getLayout();
  int end = getEndPos(widget);
  int line = layout.getLineForOffset(end);
  if (line > 0) {
    int to;
    if (layout.getParagraphDirection(line) == layout
        .getParagraphDirection(line - 1)) {
      float h = layout.getPrimaryHorizontal(end);
      to = layout.getOffsetForHorizontal(line - 1, h);
    } else {
      to = layout.getLineStart(line - 1);
    }
    mManager.setEndPos(to);
    mManager.onCursorMoved();
  }
  return true;
}

代码示例来源：origin: anitaa1990/TrailersApp

@Override
protected void onDraw(Canvas canvas) {
  TextPaint paint = getPaint();
  paint.setColor(getCurrentTextColor());
  paint.drawableState = getDrawableState();
  mViewWidth = getMeasuredWidth();
  String text = getText().toString();
  mLineY = 0;
  mLineY += getTextSize();
  Layout layout = getLayout();
  // layout.getLayout()在4.4.3出现NullPointerException
  if (layout == null) {
    return;
  }
  Paint.FontMetrics fm = paint.getFontMetrics();
  int textHeight = (int) (Math.ceil(fm.descent - fm.ascent));
  textHeight = (int) (textHeight * layout.getSpacingMultiplier() + layout.getSpacingAdd());
  for (int i = 0; i < layout.getLineCount(); i++) {
    int lineStart = layout.getLineStart(i);
    int lineEnd = layout.getLineEnd(i);
    float width = StaticLayout.getDesiredWidth(text, lineStart, lineEnd, getPaint());
    String line = text.substring(lineStart, lineEnd);
    if (needScale(line) && i < layout.getLineCount() -1) {
      drawScaledText(canvas, lineStart, line, width);
    } else {
      canvas.drawText(line, 0, mLineY, paint);
    }
    mLineY += textHeight;
  }
}

代码示例来源：origin: geniusgithub/AndroidDialer

protected boolean down(TextView widget, Spannable buffer) {
  if (DBG) {
    Log.d(LOG_TAG, "--- down:");
  }
  Layout layout = widget.getLayout();
  int end = getEndPos(widget);
  int line = layout.getLineForOffset(end);
  if (line < layout.getLineCount() - 1) {
    int to;
    if (layout.getParagraphDirection(line) == layout
        .getParagraphDirection(line + 1)) {
      float h = layout.getPrimaryHorizontal(end);
      to = layout.getOffsetForHorizontal(line + 1, h);
    } else {
      to = layout.getLineStart(line + 1);
    }
    mManager.setEndPos(to);
    mManager.onCursorMoved();
  }
  return true;
}

代码示例来源：origin: MCMrARM/revolution-irc

@Override
protected void onSelectionChanged(int selStart, int selEnd) {
  super.onSelectionChanged(selStart, selEnd);
  if (getLayout() == null)
    return;
  String line = getText().subSequence(getLayout().getLineStart(getLayout()
      .getLineForOffset(selStart)), selEnd).toString();
  boolean isPassword = getPasswordStart(line) != -1;
  boolean wasPassword = (getInputType() & InputType.TYPE_TEXT_VARIATION_PASSWORD) != 0;
  if (isPassword && !wasPassword) {
    Typeface tf = getTypeface();
    setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_MULTI_LINE |
        InputType.TYPE_TEXT_VARIATION_PASSWORD | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
    setTypeface(tf);
    setSelection(selStart, selEnd);
  } else if (!isPassword && wasPassword) {
    createPasswordSpans();
    setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_MULTI_LINE);
  }
}

代码示例来源：origin: wordpress-mobile/WordPress-Editor-Android

if (mContentEditText.getLayout() != null) {
  line = mContentEditText.getLayout().getLineForOffset(selectionStart);
  column = mContentEditText.getSelectionStart() - mContentEditText.getLayout().getLineStart(line);

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