android 空格分隔输入 Android EditTextView 实现带空格分隔的输入(电话号码,银行卡)

import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.widget.EditText;
/**
 * @desc
 * @autor Xemenes
 * @time 2017/5/12 10:18
 */
public class PhoneNumberTextWatcher implements TextWatcher {
  EditText editText;
  int lastContentLength = 0;
  boolean isDelete = false;
  public PhoneNumberTextWatcher(EditText editText) {
    this.editText = editText;
  }
  @Override
  public void beforeTextChanged(CharSequence s, int start, int count, int after) {
  }
  @Override
  public void onTextChanged(CharSequence s, int start, int before, int count) {
    StringBuffer sb = new StringBuffer(s);
    //是否为输入状态
    isDelete = s.length() > lastContentLength ? false : true;
    //输入是第4，第9位，这时需要插入空格
    if(!isDelete&& (s.length() == 4||s.length() == 9)){
      if(s.length() == 4) {
        sb.insert(3, " ");
      }else {
        sb.insert(8, " ");
      }
      setContent(sb);
    }
    //删除的位置到4，9时，剔除空格
    if (isDelete && (s.length() == 4 || s.length() == 9)) {
      sb.deleteCharAt(sb.length() - 1);
      setContent(sb);
    }
    lastContentLength = sb.length();
  }
  @Override
  public void afterTextChanged(Editable s) {
  }
  /**
   * 添加或删除空格EditText的设置
   *
   * @param sb
   */
  private void setContent(StringBuffer sb) {
    editText.setText(sb.toString());
    //移动光标到最后面
    editText.setSelection(sb.length());
  }
}