public class ChangeTextViewSpace extends TextView {
    private float spacing = Spacing.NORMAL;
    private CharSequence originalText = "";
    public ChangeTextViewSpace(Context context) {
        super(context);
    }
    
    public ChangeTextViewSpace(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    
    public ChangeTextViewSpace(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }
 
    /**
     * 獲取字間距
     */
    public float getSpacing() {
        return this.spacing;
    }
 
    /**
     * 設(shè)置間距
     */
    public void setSpacing(float spacing) {
        this.spacing = spacing;
        applySpacing();
    }
 
    @Override
    public void setText(CharSequence text, BufferType type) {
        originalText = text;
        applySpacing();
    }
 
    @Override
    public CharSequence getText() {
        return originalText;
    }
 
    /**
     * 擴(kuò)大文字空間
     */
    private void applySpacing() {
        if (this == null || this.originalText == null) return;
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < originalText.length(); i++) {
            builder.append(originalText.charAt(i));
            if (i + 1 < originalText.length()) {
                //如果前后都是英文，則不添加空格，防止英文空格太大
                if (isEnglish(originalText.charAt(i) + "") && isEnglish(originalText.charAt(i + 1) + "")) {
                } else {
                    // \u00A0 不間斷空格 碰見文字追加空格
                    builder.append("\u00A0");
                }
            }
        }
        // 通過SpannableString類，去設(shè)置空格
        SpannableString finalText = new SpannableString(builder.toString());
        // 如果當(dāng)前TextView內(nèi)容長度大于1，則進(jìn)行空格添加
        if (builder.toString().length() > 1) {
            for (int i = 1; i < builder.toString().length(); i += 2) {
                // ScaleXSpan 基于x軸縮放  按照x軸等比例進(jìn)行縮放 通過字間距+1除以10進(jìn)行等比縮放
                finalText.setSpan(new ScaleXSpan((spacing + 1) / 10), i, i + 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            }
        }
        super.setText(finalText, BufferType.SPANNABLE);
    }
 
    public class Spacing {
        public final static float NORMAL = 0;
    }
    /**
     *  判斷是否是英語
     */
    public static boolean isEnglish(String charaString) {
        return charaString.matches("^[a-zA-Z]*");
    }
 
}

代碼原地址：https://blog.csdn.net/shanshan_1117/article/details/79564271