textView英文自动换行

我不是女神ヾ 2022-05-20 08:24 235阅读 0赞

public class XRTextView extends TextView { 
        private boolean mEnabled = true;
    
        public XRTextView(Context context) {
            super(context);
        }
    
        public XRTextView(Context context, AttributeSet attrs) {
            super(context, attrs);
        }
    
        public XRTextView(Context context, AttributeSet attrs, int defStyle) {
            super(context, attrs, defStyle);
        }
    
        public void setAutoSplitEnabled(boolean enabled) {
            mEnabled = enabled;
        }
    
        @Override
        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            if (MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY
                    && MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.EXACTLY
                    && getWidth() > 0
                    && getHeight() > 0
                    && mEnabled) {
                String newText = autoSplitText(this);
                if (!TextUtils.isEmpty(newText)) {
                    setText(newText);
                }
            }
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    
        private String autoSplitText(final TextView tv) {
            final String rawText = tv.getText().toString(); //原始文本
            final Paint tvPaint = tv.getPaint(); //paint，包含字体等信息
            final float tvWidth = tv.getWidth() - tv.getPaddingLeft() - tv.getPaddingRight(); //控件可用宽度
    
            //将原始文本按行拆分
            String[] rawTextLines = rawText.replaceAll("\r", "").split("\n");
            StringBuilder sbNewText = new StringBuilder();
            for (String rawTextLine : rawTextLines) {
                if (tvPaint.measureText(rawTextLine) <= tvWidth) {
                    //如果整行宽度在控件可用宽度之内，就不处理了
                    sbNewText.append(rawTextLine);
                } else {
                    //如果整行宽度超过控件可用宽度，则按字符测量，在超过可用宽度的前一个字符处手动换行
                    float lineWidth = 0;
                    for (int cnt = 0; cnt != rawTextLine.length(); ++cnt) {
                        char ch = rawTextLine.charAt(cnt);
                        lineWidth += tvPaint.measureText(String.valueOf(ch));
                        if (lineWidth <= tvWidth) {
                            sbNewText.append(ch);
                        } else {
                            sbNewText.append("\n");
                            lineWidth = 0;
                            --cnt;
                        }
                    }
                }
                sbNewText.append("\n");
            }
    
            //把结尾多余的\n去掉
            if (!rawText.endsWith("\n")) {
                sbNewText.deleteCharAt(sbNewText.length() - 1);
            }
    
            return sbNewText.toString();
        }
    
        public void setFont(String textFont) {
            Typeface lastTypeFace = getTypeface();
            boolean isBold = lastTypeFace != null ? lastTypeFace.isBold() : false;
            Typeface typeface = FontUtil.getTypeface(textFont, getContext());
            //使用字体
            setTypeface(typeface);
            //中文字体设置加粗
            TextPaint paint = getPaint();
            paint.setFakeBoldText(isBold);
        }
    }