Android 开发 TextView中出现参差不齐状态解决方法

方法一：

在TextView中添加属性：

android:breakStrategy="simple"

方法二：

自定义TextView

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; /** * 解决文字排版混乱参差不齐的问题 */ 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()); //解决了最后一行文字间距过大的问题 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' ; } } }

更多相关文章

随机推荐