EditText游标定位问题

Z时代
2024-01-10
分类：问答

我正在使用下面的函数强制每个单词的第一个字母在Edittext中的大写字母。EditText游标定位问题

public String capitalizeFirstLetterWord(String s) { 
    StringBuilder cap = new StringBuilder(); 
    for (int i = 0; i < s.length(); i++) { 
     try { 
      char x = s.charAt(i); 
      if (x == ' ') { 
       cap.append(" "); 
       char y = s.charAt(i + 1); 
       cap.append(Character.toUpperCase(y)); 
       i++; 
      } else { 
       cap.append(x); 
      } 
     } catch (IndexOutOfBoundsException ignored) { 
     } 
    } 
    //finally, capitalize the first letter of the sentence 
    String sentence = cap.toString(); 
    if (sentence.length() > 0) { 
     sentence = String.valueOf(sentence.charAt(0)).toUpperCase(); //capitalize first letter 
     if (cap.toString().length() > 1) { //check if there's succeeding letters 
      sentence += cap.toString().substring(1); //append it also 
     } 
    } 
    return sentence; 
}

和下面称其为afterTextChange（）方法：

@Override 
    public void afterTextChanged(Editable editable) { 
     if (getActivity().getCurrentFocus() == mEdtName) { 
      if (editable.toString().length() > 0 && 
        !editable.toString().equals(mOldName)) { 
       mOldName = editable.toString(); //prevent infinite loop 
      mEdtName.setText(capitalizeFirstLetterWord(editable.toString())); 
mEdName.setSelection(mEdGymName.getText().length()); //set the cursor to the end of the editText 
      } 
     } 
    }

但是，问题是，当我试图抹去从Editext整个字符串中间的字符。游标正在文本的末尾移动。。这是因为在的下面一行afterTextChanged（）方法。如果我评论该行，光标移动到第一个位置。。

什么可能是解决方案？

回答：

试试这个：

@Override 
public void afterTextChanged(Editable editable) { 
    if (getActivity().getCurrentFocus() == mEdtName) { 
     if (editable.toString().length() > 0 && !editable.toString().equals(mOldName)) { 
      int selection = mEditName.getSelectionEnd(); 
      mOldName = editable.toString(); //prevent infinite loop 
      mEditName.removeTextChangedListener(this); 
     mEditName.setText(capitalizeFirstLetterWord(editable.toString())); 
      mEditName.setSelection(selection); 
      mEditName.addTextChangedListener(this); 
     } 
    } 
}