Android Open Source - LCFR-Mobile-Android Get S3 File

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Back to project page LCFR-Mobile-Android.

License

The source code is released under:

Apache License

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Java Source Code

package org.dizon.lcfrmobile;
//from  ww  w .  j a va2 s  . com
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.Calendar;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.s3.AmazonS3Client;

import android.content.Context;
import android.os.AsyncTask;

public class GetS3File extends AsyncTask<String, Integer, String>{
  private Context context;
  private OnDownloadNotify notify;
  private String fileName;
  
  public GetS3File(Context _context)
  {
    context=_context;
  }
  
  public GetS3File(Context _context, OnDownloadNotify _notify)
  {
    context=_context;
    notify=_notify;
  }

  @Override
  protected String doInBackground(String... params) {
    fileName = params[0];
      doDownload(fileName);  
    return null;
  }
  
  public void doDownload(String fileName){
    AWSCredentials creds = new BasicAWSCredentials(context.getResources().getString(R.string.aws_access_key), context.getResources().getString(R.string.aws_secret_key));
    
    AmazonS3Client s3client = new AmazonS3Client(creds);
    Calendar c = Calendar.getInstance();
    c.add(Calendar.MINUTE, 60);
    URL downloadURL = s3client.generatePresignedUrl(context.getResources().getString(R.string.aws_s3_bucket_name), fileName, c.getTime());
    
    HttpClient client = new DefaultHttpClient();
    HttpGet request = new HttpGet(downloadURL.toString());
    HttpResponse response = null;
    try {
      response = client.execute(request);
    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
      return;
    } 

    // Get the response
    BufferedInputStream bis = null;
    try {
      bis = new BufferedInputStream(response.getEntity().getContent());
    } catch (IllegalStateException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
    } catch (IOException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
    }
    BufferedOutputStream bos = null;

    FileOutputStream fos = null;
    try {
      fos = context.openFileOutput(fileName, Context.MODE_PRIVATE);
    } catch (FileNotFoundException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    bos = new BufferedOutputStream(fos);
    int inByte;
    try {
      while((inByte = bis.read()) != -1) bos.write(inByte);
    } catch (IOException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
    }
    try {
      bis.close();
    } catch (IOException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
    }
    try {
      bos.close();
    } catch (IOException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
    }
    try {
      fos.close();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    
    if(notify!=null){
      notify.DownloadComplete(fileName);
    }
    
    return;

  }

}

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