本文实例讲述了Android EditText限制输入字数的方法。分享给大家供大家参考，具体如下：
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//新浪微博字数限制
private static final int WEIBO_CONTENT_LENGTH_LIMITED = 140;
//添加微博内容edittext
mInputEditText.addTextChangedListener(mTextWatcher);
private TextWatcher mTextWatcher = new TextWatcher() {
private int editStart;
private int editEnd;
public void afterTextChanged(Editable s) {
editStart = mInputEditText.getSelectionStart();
editEnd = mInputEditText.getSelectionEnd();
// 先去掉监听器，否则会出现栈溢出
mInputEditText.removeTextChangedListener(mTextWatcher);
while (mInputEditText.getText().toString().length() > WEIBO_CONTENT_LENGTH_LIMITED) {
s.delete(editStart - 1, editEnd);
editStart--;
editEnd--;
}
mInputEditText.setText(s);
mInputEditText.setSelection(editStart);
mInputEditText.addTextChangedListener(mTextWatcher);
setPromptContent();
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
};
/**
* refresh prompt content numbers
*/
private void setPromptContent() {
int contentLength = mInputEditText.getText().toString().length();
mInputEditText.setSelection(contentLength);
int limitedLength = WEIBO_CONTENT_LENGTH_LIMITED - contentLength;
String prefix = getResources().getString(R.string.weibo_content_numbers_prefix);
String suffix = getResources().getString(R.string.weibo_content_numbers_suffix);
String promptContentNumbers = prefix + limitedLength + suffix;
SpannableStringBuilder style = new SpannableStringBuilder(promptContentNumbers);
style.setSpan(new ForegroundColorSpan(Color.RED), prefix.length(), promptContentNumbers.length() - suffix.length(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
mPromptContentNumbers.setText(style);
}
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希望本文所述对大家Android程序设计有所帮助。