Android Dev Help: Saving an image from Res/raw or Asset folder to the Sd card

Posted by Lucy on Stack Overflow See other posts from Stack Overflow or by Lucy
Published on 2010-12-22T13:58:39Z Indexed on 2010/12/23 13:54 UTC
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Android Development Query

Hello,

I wonder if anyone could help me, i am trying to save an image (jpg or png) from the res/raw or assets folder to the SD card location (/sdcard/DCIM/).

I have been following a tutorial which can save an image from a URL to the SD card Root, but i have looked everywhere to be able to save from res/raw or asset folder instead, and to a differnet location onthe sd card /sdcard/DCIM/

Here is the code, can anyone show me how to do the above from this?

Thanks Lucy

public class home extends Activity {
private File file;
 private String imgNumber;
 private Button btnDownload;
 /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main); 
   btnDownload=(Button)findViewById(R.id.btnDownload);

  btnDownload.setOnClickListener(new OnClickListener() {

 public void onClick(View v) {
   btnDownload.setText("Download is in Progress.");
  String savedFilePath=Download("http://www.domain.com/android1.png");
  Toast.makeText(getApplicationContext(), "File is Saved in  "+savedFilePath, 1000).show();
  if(savedFilePath!=null)
  {
    btnDownload.setText("Download Completed.");
  }
 }
});

} 
public String Download(String Url)
{
String filepath=null;
try {
//set the download URL, a url that points to a file on the internet
//this is the file to be downloaded
URL url = new URL(Url);
//create the new connection
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

//set up some things on the connection
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
//and connect!
urlConnection.connect();
//set the path where we want to save the file
//in this case, going to save it on the root directory of the
//sd card.
File SDCardRoot = Environment.getExternalStorageDirectory();
//create a new file, specifying the path, and the filename
//which we want to save the file as.

String filename= "download_"+System.currentTimeMillis()+".png";   // you can download to any type of file ex:.jpeg (image) ,.txt(text file),.mp3 (audio file)
Log.i("Local filename:",""+filename);
file = new File(SDCardRoot,filename);
if(file.createNewFile())
{
file.createNewFile();
}

//this will be used to write the downloaded data into the file we created
FileOutputStream fileOutput = new FileOutputStream(file);

//this will be used in reading the data from the internet
InputStream inputStream = urlConnection.getInputStream();

//this is the total size of the file
int totalSize = urlConnection.getContentLength();
//variable to store total downloaded bytes
int downloadedSize = 0;

//create a buffer...
byte[] buffer = new byte[1024];
int bufferLength = 0; //used to store a temporary size of the buffer

//now, read through the input buffer and write the contents to the file
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
//add the data in the buffer to the file in the file output stream (the file on the sd card
fileOutput.write(buffer, 0, bufferLength);
//add up the size so we know how much is downloaded
downloadedSize += bufferLength;
//this is where you would do something to report the prgress, like this maybe
Log.i("Progress:","downloadedSize:"+downloadedSize+"totalSize:"+ totalSize) ;
btnDownload.setText("download Status:"+downloadedSize+" / "+totalSize);
}
//close the output stream when done
fileOutput.close();
if(downloadedSize==totalSize) filepath=file.getPath();

//catch some possible errors...
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
filepath=null;

btnDownload.setText("Internet Connection Failed.\n"+e.getMessage());
e.printStackTrace();
}
Log.i("filepath:"," "+filepath) ; 
return filepath;

}

}

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