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private void selectDB(String username, String userpassword) {
class SelectData extends AsyncTask<String, Void, String> {
ProgressDialog loading;
@Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(FindActivity.this, "Please Wait", null, true, true);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();

if(box.equals("1") || box.equals("2") || box.equals("3")) {
String msg = null;

switch(box) {
case "1" : msg = "8"; break; //0b0011_1000
case "2" : msg = "9"; break; //0b0011_1001
case "3" : msg = ":"; break; //0b0011_1010
}

btService.write(msg);

deleteDB(box);
}
else Toast.makeText(getApplicationContext(),
" 데이터가 존재하지 않습니다.",
Toast.LENGTH_LONG).show();
}
@Override
protected String doInBackground(String... params) {

try {
String username = (String) params[0];
String userpassword = (String) params[1];

String link = "http://192.168.0.39/select.php";
String data = URLEncoder.encode("username", "UTF-8") + "=" +
URLEncoder.encode(username, "UTF-8");
data += "&" + URLEncoder.encode("userpassword", "UTF-8") + "=" +
URLEncoder.encode(userpassword, "UTF-8");

URL url = new URL(link);

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