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Android項(xiàng)目中出現(xiàn)TextView排版參差不齊如何解決?相信很多沒有經(jīng)驗(yàn)的人對(duì)此束手無策,為此本文總結(jié)了問題出現(xiàn)的原因和解決方法,通過這篇文章希望你能解決這個(gè)問題。
Android 解決TextView排版參差不齊的問題
在app中,展示數(shù)據(jù)時(shí),里面有漢字、數(shù)字、特殊字符時(shí),由于全角、半角問題導(dǎo)致TextView參差不齊。在網(wǎng)上找了許多,半角轉(zhuǎn)全角并沒什么用,還有其他自定義TextView都有問題。最后終于找到一個(gè),就像Word一樣,可以使文字左右兩端對(duì)齊:
package com.monkey.monkeymushroom.view; import android.content.Context; import android.graphics.Canvas; import android.graphics.Paint; import android.text.Layout; import android.text.StaticLayout; import android.text.TextPaint; import android.util.AttributeSet; import android.widget.TextView; /** * 解決文字排版混亂參差不齊的問題 */ public class JustifyTextView extends TextView { private int mLineY; private int mViewWidth; public static final String TWO_CHINESE_BLANK = " "; public JustifyTextView(Context context, AttributeSet attrs) { super(context, attrs); } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { super.onLayout(changed, left, top, right, bottom); } @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出現(xiàn)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()); //解決了最后一行文字間距過大的問題 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 (i < layout.getLineCount() - 1) { if (needScale(line)) { drawScaledText(canvas, lineStart, line, width); } else { canvas.drawText(line, 0, mLineY, paint); } } else { canvas.drawText(line, 0, mLineY, paint); } mLineY += textHeight; } } private void drawScaledText(Canvas canvas, int lineStart, String line, float lineWidth) { float x = 0; if (isFirstLineOfParagraph(lineStart, line)) { String blanks = " "; canvas.drawText(blanks, x, mLineY, getPaint()); float bw = StaticLayout.getDesiredWidth(blanks, getPaint()); x += bw; line = line.substring(3); } int gapCount = line.length() - 1; int i = 0; if (line.length() > 2 && line.charAt(0) == 12288 && line.charAt(1) == 12288) { String substring = line.substring(0, 2); float cw = StaticLayout.getDesiredWidth(substring, getPaint()); canvas.drawText(substring, x, mLineY, getPaint()); x += cw; i += 2; } float d = (mViewWidth - lineWidth) / gapCount; for (; i < line.length(); i++) { String c = String.valueOf(line.charAt(i)); float cw = StaticLayout.getDesiredWidth(c, getPaint()); canvas.drawText(c, x, mLineY, getPaint()); x += cw + d; } } private boolean isFirstLineOfParagraph(int lineStart, String line) { return line.length() > 3 && line.charAt(0) == ' ' && line.charAt(1) == ' '; } private boolean needScale(String line) { if (line == null || line.length() == 0) { return false; } else { return line.charAt(line.length() - 1) != '\n'; } } }
看完上述內(nèi)容,你們掌握Android項(xiàng)目中出現(xiàn)TextView排版參差不齊如何解決的方法了嗎?如果還想學(xué)到更多技能或想了解更多相關(guān)內(nèi)容,歡迎關(guān)注億速云行業(yè)資訊頻道,感謝各位的閱讀!
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