问题描述

Textview重写后ellipsize属性失效

最近遇到textview内容中英文符号混排，重写自定义textview绘制后不会提前换行了，但是不显示全部省略号ellipsize属性不起作用，不管是xml还是代码写都看不见省略号了，希望有经验的人能给出更好地解决办法

解决方案

省略号也要自己绘制，所以你要改写你的自定义组件，判断文字宽度是否快达到右侧边缘了，然后加上省略号

解决方案二：

TextView中ellipsize属性
TextView中ellipsize属性
TextView中ellipsize属性
----------------------

解决方案三：

代码能否贡献出来，让我等参谋参谋

解决方案四：

package com.mtextview;

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;

public class MTextView extends TextView {

private int mLineY;
private int mViewWidth;
public static final String TWO_CHINESE_BLANK = "  ";

public MTextView(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) != '
';
    }
}

}