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：

//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);

}

更多关于Android控件相关内容感兴趣的读者可查看本站专题：《Android控件用法总结》

希望本文所述对大家Android程序设计有所帮助。