안드로이드 네트워크(소켓): 버튼을 누르면 특정 사이트 코드 가져오기

안드로이드 네트워크(소켓)

1. 설정

네트워크 관련은 과금과 관련있기 때문에 반드시 AndroidManifest.xml에 권한 설정을 해줘야만 한다.

<uses-permission android:name="android.permission.INTERNET" />

2. 레이아웃

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.progdv.chap13_network.MainActivity">

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <EditText
            android:id="@+id/editURL"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:text="네이버"
            />

        <Button
            android:id="@+id/btnRequest"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="요청"
            />


    </LinearLayout>

    <TextView
        android:id="@+id/textResult"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="메인 홈페이지 정보" />

</LinearLayout>

3. 메인 액티비티

package com.progdv.chap13_network;

import android.app.Dialog;
import android.app.DialogFragment;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.text.method.ScrollingMovementMethod;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;

public class MainActivity extends AppCompatActivity {
    EditText editURL;
    Button btnRequest;
    TextView textView;
    String result;

    Handler handler = new Handler();


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

        editURL = (EditText)findViewById(R.id.editURL);
        btnRequest = (Button)findViewById(R.id.btnRequest);
        textView = (TextView)findViewById(R.id.textResult);

        textView.setMovementMethod(new ScrollingMovementMethod()); // 스크롤 기능
        btnRequest.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String requestURL = editURL.getText().toString();

                final MyDialogFragment fragment = MyDialogFragment.newInstance();
                fragment.show(getFragmentManager(), "TAG");

                Thread thread = new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            URL url = new URL(requestURL);
                            InputStream is = url.openStream();
                            result = streamToString(is);
                        } catch (MalformedURLException e) {
                            e.printStackTrace();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }

                        handler.post(new Runnable() {
                            @Override
                            public void run() {
                                textView.setText(result);
                                fragment.dismiss();
                            }
                        });
                    }
                });

                thread.start();
            }
        });
    }

    private String streamToString(InputStream is){
        StringBuffer buffer = new StringBuffer(); // 문자열끼리 결합을 위한 클래스


        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
            String str = reader.readLine();
            while (str != null){
                buffer.append(str);
                str = reader.readLine();
            }

            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return buffer.toString();
    }

    public static class MyDialogFragment extends DialogFragment {

        public static MyDialogFragment newInstance(){
            return new MyDialogFragment();
        }

        @NonNull
        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            ProgressDialog dialog = new ProgressDialog(getActivity());
            dialog.setTitle("네트워크");
            dialog.setMessage("요청중...");
            dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);

            return dialog;
        }
    }
}

스레드 처리를 통한 스피닝 애니메이션 효과

화면 하단에 입력한 URL의 코드가 표시된다.