EditText 总结

1. 统计输入字数

 EditText content;//定义一个文本输入框 TextView hasnum;// 用来显示剩余字数 int num = 140;//限制的最大字数　　        content = (EditText) findViewById(R.id.et_content); hasnumTV = (TextView) findViewById(R.id.tv_num); hasnumTV.setText(num+""); //下面为EditText文本框添加监听 content.addTextChangedListener(new TextWatcher() {  private CharSequence temp;  private int selectionStart;  private int selectionEnd;private int num = 140;  public void beforeTextChanged(CharSequence s, int start, int count, int after) {  }  public void onTextChanged(CharSequence s, int start, int before, int count) {   temp = s;  }  public void afterTextChanged(Editable s) {   int number = num - s.length();   hasnumTV.setText("" + number);   selectionStart = content.getSelectionStart();   selectionEnd = content.getSelectionEnd();   if (temp.length() > num) {    s.delete(selectionStart - 1, selectionEnd);    int tempSelection = selectionEnd;    content.setText(s);    content.setSelection(tempSelection);//设置光标在最后   }  } });

避免一进入一个页面, EditText默认就会自动获取焦点。

      解决之道：在EditText的父级控件中找一个，设置成

          android:focusable="true" 
          android:focusableInTouchMode="true"

      这样，就把EditText默认的行为截断了！

3. 禁止复制和粘贴

setLongClickable(false);