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[동영상 강좌 ] 블스 - 제 29강 네트워크 - HttpURLConnection 네트워크상에 있는 이미지 다운로드 , [ 쓰레드(Thread), AsyncTask ]

2017-09-03 18:46:12 By 머나먼나라 0 657 댓글수 4 포스트 하기

11월 2024
일	월	화	수	목	금	토
					1	2
3	4	5	6	7	8	9
10	11	12	13	14	15	16
17	18	19	20	21	22	23
24	25	26	27	28	29	30

AndroidManifest.xml


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

class MainActivity

package com.example.choi.mystudy29_3;

import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends AppCompatActivity {

    final static String TAG="MainActivity";
    String urlAddr="http://braverokmc.dothome.co.kr/include/images/beautiful/49.jpg";
    String urlAddr2="http://braverokmc.dothome.co.kr/include/images/beautiful/30.jpg";
    Button threadButton, asyncTaskButton;
    ImageView ivNet;

    MyThread thread;

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

        threadButton=(Button)findViewById(R.id.threadButton);
        asyncTaskButton=(Button)findViewById(R.id.asyncTaskButton);

        ivNet=(ImageView)findViewById(R.id.iv_network_img);


        threadButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if(thread!=null)thread.interrupt(); thread=null;

                thread=new MyThread();
                thread.setDaemon(true);
                thread.start();

            }
        });

        asyncTaskButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if(thread!=null)thread.interrupt(); thread=null;

                NetWorkAsyncTask netWorkAsyncTask=new NetWorkAsyncTask(MainActivity.this, ivNet, urlAddr);
                netWorkAsyncTask.execute(100);
            }
        });


    }


   class MyThread extends Thread{

       ProgressDialog dialog;
       String devicePath;

       @Override
       public void run() {

           try {

               //다이얼로그 호출
               runOnUiThread(new Runnable() {
                   @Override
                   public void run() {
                       dialog();
                   }
               });


               //안드로이드 이미지 다운로드
               imageDownLoad();


               //안드로이드 에 내부저장소에서 저장된 이미지 불러오기
               runOnUiThread(new Runnable() {
                   @Override
                   public void run() {
                       imageShow();
                   }
               });

               //다이얼로그 종료
               if(dialog!=null)dialog.dismiss();

           }catch (Exception e){
               e.printStackTrace();
           }

       }



       public void dialog(){
           dialog=new ProgressDialog(MainActivity.this);
           dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
           dialog.setTitle("스레드 Dialog");
           dialog.setMessage("이미지 다운로드");
           dialog.show();
       }


       public void imageDownLoad(){

           InputStream is =null;
           FileOutputStream fos=null;

           int index=urlAddr2.lastIndexOf("/");
           String imageName=urlAddr2.substring(index+1);

           devicePath= Environment.getDataDirectory().getAbsolutePath()+"/data/com.example.choi.mystudy29_3/files/"+imageName;


           try {

               URL url=new URL(urlAddr2);
               HttpURLConnection connection=(HttpURLConnection)url.openConnection();
               connection.setConnectTimeout(10000);

               int len= 1024; //connection.getContentLength();
               byte[] bs =new byte[len];

               if(connection.getResponseCode()==HttpURLConnection.HTTP_OK){

                   is=connection.getInputStream();
                   fos=MainActivity.this.openFileOutput(imageName, 0);

                   while (true){
                        int i=is.read(bs);
                        if(i<0)break;
                        fos.write(bs, 0, i);
                   }
               }


               //1초지연
               try {
                   Thread.sleep(1000);
               }catch (Exception e){
                   e.printStackTrace();
               }

           }catch (Exception e){
               e.printStackTrace();
           }finally {
               try {
                   if(fos!=null)fos.close();
                   if(is!=null)is.close();
               }catch (Exception e2){
                   e2.printStackTrace();
               }
           }


       }


       public void imageShow(){

           Bitmap bitmap= BitmapFactory.decodeFile(devicePath);
           ivNet.setImageBitmap(bitmap);
       }


   }



}

R.layout.activity_main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.choi.mystudy29_3.MainActivity">

    <LinearLayout
        android:id="@+id/line1"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true">

        <Button
            android:text="스레드"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/threadButton"
            android:layout_weight="1"
            android:background="@color/colorAccent"
            android:textColor="@android:color/background_light" />

        <Button
            android:text="AsyncTask"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/asyncTaskButton"
            android:layout_weight="1"
            android:textAllCaps="false"
            android:background="@android:color/holo_blue_dark"
            android:textColor="@android:color/background_light" />
    </LinearLayout>

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"

        android:id="@+id/iv_network_img"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
</RelativeLayout>

class NetWorkAsyncTask

package com.example.choi.mystudy29_3;

import android.app.ProgressDialog;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Environment;
import android.util.Log;
import android.widget.ImageView;

import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import static android.content.Context.MODE_PRIVATE;

/**
 * Created by choi on 2017-03-18.
 */

public class NetWorkAsyncTask extends AsyncTask<Integer, String, Integer > {
    final static String TAG ="NetWorkAsyncTask";
    Context mContext;
    String mAddr;
    ProgressDialog dialog=null;
    String devicePath;
    ImageView ivNet;

    public NetWorkAsyncTask(Context context, ImageView iv, String url) {
        this.mContext=context;
        this.ivNet=iv;
        this.mAddr=url;
    }

    @Override
    protected void onPreExecute() {
        Log.i(TAG, "onPreExecute()");
        dialog=new ProgressDialog(mContext);
        dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        dialog.setTitle("Async Dialog");
        dialog.setMessage("down......");
        dialog.show();
    }



    @Override
    protected Integer doInBackground(Integer... params) {
        Log.i(TAG, "doInBackground()");

        Log.i(TAG, " params : "+params[0]);


        int index=mAddr.lastIndexOf("/");
        String imgName=mAddr.substring(index+1);

        //이미지 안드로이드 저장 위치
        devicePath= Environment.getDataDirectory().getAbsolutePath()+"/data/com.example.choi.mystudy29_3/files/"+imgName;

        InputStream is =null;
        FileOutputStream fos=null;

        try {
            URL url=new URL(mAddr);
            HttpURLConnection connection=(HttpURLConnection)url.openConnection();
            connection.setConnectTimeout(10000);

            int len=connection.getContentLength(); //1024
            byte[] bs=new byte[len];

            if(connection.getResponseCode()==HttpURLConnection.HTTP_OK){

                is=connection.getInputStream();
                fos=mContext.openFileOutput(imgName, MODE_PRIVATE);

                while (true){
                    int i=is.read(bs);
                    if(i<0)break;
                    fos.write(bs, 0, i);
                }

                //1초지연
                try {
                    Thread.sleep(1000);
                }catch (Exception e){
                    e.printStackTrace();
                }

            }

        }catch (Exception e){
            e.printStackTrace();
        }finally {
            try {
                if(fos!=null)fos.close();
                if(is!=null)is.close();
            }catch (Exception e2){
                e2.printStackTrace();
            }
        }

        return null;
    }


    @Override
    protected void onProgressUpdate(String... values) {
        Log.i(TAG, "onProgressUpdate()");
        super.onProgressUpdate(values);
    }


    @Override
    protected void onPostExecute(Integer integer) {
        Log.i(TAG, "onPreExecute()");
        //안드로이드 내부 저장소에 저장된 이미지 불러오기
        Bitmap bitmap= BitmapFactory.decodeFile(devicePath);
        ivNet.setImageBitmap(bitmap);

        dialog.dismiss();
    }



    @Override
    protected void onCancelled(Integer integer) {
        Log.i(TAG, "onCancelled(Integer integer)");
        super.onCancelled(integer);
    }

    @Override
    protected void onCancelled() {
        Log.i(TAG, "onCancelled()");
        super.onCancelled();
    }


}