Android中AlertDialog 点击按钮后不关闭对话框的功能

private void openDialog() { LinearLayout linearLayout = (LinearLayout) LayoutInflater.from(getContext()).inflate(R.layout.change_password_dialog, null); final EditText originPasswordEt = (EditText) linearLayout.findViewById(R.id.origin_password); TextView forgetPassword = (TextView) linearLayout.findViewById(R.id.forget_password); final AlertDialog dialog = new AlertDialog.Builder(getContext())  .setView(linearLayout)  .setPositiveButton("确定", new DialogInterface.OnClickListener() {   @Override    public void onClick(DialogInterface dialog, int which) {    String originPassword = originPasswordEt.getText().toString().trim();     //传到后台    }  })  .create(); dialog.show();}

final AlertDialog dialog = new AlertDialog.Builder(getActivity())  .setTitle(msg)  .setView(layout)  .setNegativeButton("取消", new DialogInterface.OnClickListener() {   @Override   public void onClick(DialogInterface dialog, int which) {    dialog.dismiss();   }  })  .setPositiveButton("submit",null)  .setCancelable(true)  .create();dialog.show();//为了避免点击 positive 按钮后直接关闭 dialog,把点击事件拿出来设置dialog.getButton(AlertDialog.BUTTON_POSITIVE)  .setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {  Pattern pattern = Pattern.compile("[0-9]*");  Matcher matcher = pattern.matcher(editText.getText());  if (!matcher.matches()){   showToast("请输入正确的 ID");   break;  }  dialog.dismiss();  } }});