在开发应用的时候,经常会限制用户输入的字数,比如发表评论或者其它什么的,下面来个简单的demo
EditText
et_content;//定义一个文本输入框
TextView
tv_num;// 用来显示剩余字数
int num =
10;//限制的最大字数
et_content = (EditText)
findViewById(R.id.et_content);
tv_num
= (TextView) findViewById(R.id.tv_num);
tv_num.setText("10");
下面为EditText文本框添加监听
et_content.addTextChangedListener(new TextWatcher() {
private CharSequence temp;
private int selectionStart;
private int selectionEnd;
@Override
public void onTextChanged(CharSequence s, int start, int
before,
int count) {
temp = s;
System.out.println("s="+s);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int
count,
int after) {