android 字体空格,android – 在textview中设置字母之间的空格

我今天必须自己这样做,所以这里有一些关于这个问题的更新：

从API 21开始,您可以使用XML属性android：letterSpacing =“2”或者来自代码myEditText.setLetterSpacing(2);

在API 21之前,使用带有以下代码的TextWatcher

private static final String LETTER_SPACING = " ";

private EditText myEditText;

private String myPreviousText;

...

// Get the views

myEditText = (EditText) v.findViewById(R.id.edt_code);

myEditText.addTextChangedListener(this);

...

@Override

public void beforeTextChanged(CharSequence s,int start,int count,int after) {

// Nothing here

}

@Override

public void onTextChanged(CharSequence s,int before,int count) {

// Nothing here

}

@Override

public void afterTextChanged(Editable s) {

String text = s.toString();

// Only update the EditText when the user modify it -> Otherwise it will be triggered when adding spaces

if (!text.equals(myPreviousText)) {

// Remove spaces

text = text.replace(" ","");

// Add space between each character

StringBuilder newText = new StringBuilder();

for (int i = 0; i < text.length(); i++) {

if (i == text.length() - 1) {

// Do not add a space after the last character -> Allow user to delete last character

newText.append(Character.toUpperCase(text.charAt(text.length() - 1)));

}

else {

newText.append(Character.toUpperCase(text.charAt(i)) + LETTER_SPACING);

}

}

myPreviousText = newText.toString();

// Update the text with spaces and place the cursor at the end

myEditText.setText(newText);

myEditText.setSelection(newText.length());

}

}