아래의 에러 관련해서 어떻게 해결을 해주어야 할지 모르겠습니다 ㅠ ㅠ

Question

 

안녕하세요.

스레드를 사용하는 부분에서 어떻게 제 소스를 바꿔주어야 실행이 될지 모르겠습니다.

몇날며칠 이걸로 밤을 새는지 모르겠습니다 ㅠ 아래는 에러의 사진이고 그 아래는 에러의 코드를

적어보았습니다.

E/AndroidRuntime: FATAL EXCEPTION: Thread-4404
                  Process: com.example.milking.important, PID: 3636
                  java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
                      at android.os.Handler.<init>(Handler.java:200)
                      at android.os.Handler.<init>(Handler.java:114)
                      at android.widget.Toast$TN.<init>(Toast.java:367)
                      at android.widget.Toast.<init>(Toast.java:113)
                      at android.widget.Toast.makeText(Toast.java:271)
                      at com.example.milking.important.First.run(First.java:122)
                      at java.lang.Thread.run(Thread.java:831)

 

그리고 이 아래는 소스의 원문입니다.. 소스가 짤리는 부분은, 아래의 댓글부분에 좀 더 이어서

붙여보겠습니다.

package com.example.milking.important;

import android.content.Intent;
import android.graphics.Color;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.Toast;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;

public class First extends AppCompatActivity implements Runnable{

    boolean isActivityRun = true;
    Toolbar toolbar;

    private Socket socket;
    private DataInputStream dataInputStream;
    private DataOutputStream dataOutputStream;
    private byte[] buffer;

    private Thread thread;
    private String ip="192.168.11.6";

    private Button transferButton;
    private Button SmallButton1;
    private Button SmallButton2;

    private final static int TRANSFER=1;
    private final static int NOMOVEMENT=0;
    private int rwFlag;
    private boolean threadStopFlag;                   //스레드를 멈출지 말지 정하는 변수

    Button next;

 

Comments

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_first);

        buffer=new byte[1];
        rwFlag=NOMOVEMENT;
        threadStopFlag=false;

        next = (Button) findViewById(R.id.open);
        next.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                rwFlag=TRANSFER;
                setNotify();

            }
        });

        thread=new Thread(First.this);
        thread.start();




        ActionBar actionBar = getSupportActionBar();
        actionBar.setDisplayShowTitleEnabled(false);


        transferButton=(Button)findViewById(R.id.big_door);
        transferButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                transferButton.setSelected(true);
                SmallButton1.setSelected(false);
                SmallButton2.setSelected(false);

            }
        });


        SmallButton1=(Button)findViewById(R.id.small_door1);
        SmallButton1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SmallButton1.setSelected(true);
                SmallButton2.setSelected(false);
                transferButton.setSelected(false);

            }
        });

        SmallButton2=(Button)findViewById(R.id.small_door2);
        SmallButton2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SmallButton2.setSelected(true);
                SmallButton1.setSelected(false);
                transferButton.setSelected(false);
            }
        });


    }

    //실제 스레드가 돌아가는 곳
    @Override
    public void run() {
        try {
            Log.i("socket", "attemping connect");
            socket=new Socket(ip,4251);
            Log.i("socket","connect success");
            dataInputStream=new DataInputStream(socket.getInputStream());
            dataOutputStream=new DataOutputStream(socket.getOutputStream());
        } catch (IOException e) {
            e.printStackTrace();
            Log.i("Input Error", "connect | dataInput | dataOutput error");
            Toast.makeText(First.this, "IP가 맞지 않습니다.", Toast.LENGTH_SHORT).show();
        }

        while(true)
        {
            if(threadStopFlag)
            {
                try {
                    dataOutputStream.close();
                    Log.i("dataOutputStrema","dataoutputstream close");
                    dataInputStream.close();
                    Log.i("datainputStrema", "datainputstream close");
                    socket.close();
                    Log.i("socket", "socket close");
                } catch (IOException e)
                {
                    e.printStackTrace();
                }
                break;
            }
            Log.i("thread", String.valueOf(rwFlag));
            switch(rwFlag)
            {
                case TRANSFER:
                    buffer[0]='t';
                    try {
                        dataOutputStream.write(buffer);
                        Log.i("write", "t");
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    break;
            }

            setWait();
        }
    }



    public synchronized void setNotify() {
        notify();
    }

    public synchronized void setWait()
    {

        try {
            wait();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }



    public boolean onKeyDown(int keyCode, KeyEvent event) {
        switch (keyCode) {
            case KeyEvent.KEYCODE_BACK:
                if(isActivityRun) {
                    return true;
                } else {
                    finish();
                    return false;
                }
            default:
                return false;
        }
    }


}

Answer 1

FIrst.java  122 Line 코드를 올려주세요

Comments

빅배스님 해결했습니다.

매번 정말 감사드립니다..

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