android studio printwriter println 질문 있어요 ㅠㅠ

Question

package com.example.car_parking; import androidx.appcompat.app.AppCompatActivity; import android.app.AlertDialog;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.graphics.Color;import android.hardware.Sensor;import android.os.Bundle;import android.os.StrictMode;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.EditText;import android.widget.Spinner;import android.widget.TextView;import android.widget.Toast; import java.io.DataInputStream;import java.io.InputStream;import java.io.ObjectOutputStream;import java.io.PrintWriter;import java.net.Socket; public class MainActivity extends AppCompatActivity { private static final String TAG &#61; &#34;&#34;; Button btn_dialog5; private Spinner spinner; private Socket socket; private thread thread; private InputStream IS; private PrintWriter OS; private int port &#61; 8888; private String SERVER_IP &#61; &#34;&#34;; &#64;Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); StrictMode.ThreadPolicy policy &#61; new StrictMode.ThreadPolicy.Builder().permitAll().build(); StrictMode.setThreadPolicy(policy); try{ socket &#61; new Socket(SERVER_IP, port); Log.d(&#34;socket1&#34;,&#34;socket1&#34;); OS &#61; new PrintWriter(socket.getOutputStream(),true); Log.d(&#34;socket&#34;,&#34;socket&#34;); }catch(Exception e){ e.printStackTrace(); } thread &#61; new thread(); thread.start(); OS.println(&#34;connect success&#34;); Log.d(&#34;thread&#34;,&#34;thread&#34;); btn_dialog5 &#61; (Button) findViewById(R.id.btn_5); class thread extends Thread { &#64;Override public void run() { byte[] buf &#61; new byte[1024]; while(true) { try { DataInputStream DIS &#61; new DataInputStream(IS); DIS.read(buf,0,1024); final String data &#61; new String(buf,0,1024); runOnUiThread(new Runnable() { &#64;Override public void run() { if (data.contains(&#34;hello&#34;)) { btn_dialog5.setBackgroundColor(Color.RED); btn_dialog5.setOnClickListener(new View.OnClickListener() { &#64;Override public void onClick(View view) { Toast.makeText(MainActivity.this, &#34;WARNING : A car already exists.&#34;, Toast.LENGTH_SHORT).show(); } }); } else if (data.contains(&#34;bye&#34;)) { btn_dialog5.setBackgroundColor(Color.BLUE); btn_dialog5.setOnClickListener(new View.OnClickListener() { &#64;Override public void onClick(View view) { Toast.makeText(MainActivity.this, &#34;Wait a Moment&#34;, Toast.LENGTH_SHORT).show(); } }); } else if (data.contains(&#34;hi&#34;)) { btn_dialog5.setOnClickListener(new View.OnClickListener() { &#64;Override public void onClick(View view) { final EditText carnumber &#61; new EditText(MainActivity.this); AlertDialog.Builder builder &#61; new AlertDialog.Builder(MainActivity.this); builder.setTitle(&#34;Reservation&#34;); builder.setMessage(&#34;예약할 차 번호를 입력하세요&#34;); builder.setView(carnumber); builder.setPositiveButton(&#34;OK&#34;, new DialogInterface.OnClickListener() { &#64;Override public void onClick(DialogInterface dialogInterface, int i) { String CAR &#61; carnumber.getText().toString(); OS.println(CAR); } }); builder.setNegativeButton(&#34;cancel&#34;, new DialogInterface.OnClickListener() { &#64;Override public void onClick(DialogInterface dialogInterface, int i) { } }); } }); } } }); }catch (Exception e) { e.printStackTrace(); } } } }} 위에 구현한 부분은 서버와 클라이언트랑 양방향 통신 중에 client에 해당하는 부분입니다.앱을 실행시켰을때 바로 socket 생성해서 thread 실행하게 만들고 싶은데요첫번째 문제는 onCreate 문 안에 OS.println(&#34;connect success&#34;); 이 구문이 있으면 앱에 오류가 생겨요두번째 문제는 서버랑 클라이언트가 connect가 안돼요ㅠㅠ 도와주세요

android studio printwriter println 질문 있어요 ㅠㅠ

0개의 답변

#client 목록