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(jiàn)文字追加空格
builder.append("\u00A0");
}
}
}
// 通過(guò)SpannableString類(lèi)苍碟，去設(shè)置空格
SpannableString finalText = new SpannableString(builder.toString());
// 如果當(dāng)前TextView內(nèi)容長(zhǎng)度大于1旧蛾，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(guò)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(yǔ)
*/
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
