I want to update an image view source after downloading in OnPostExecute method in async method
Here is getView method of my base adapter class
public View getView(int position, View convertView, ViewGroup parent) {
vi = convertView;
ViewHolder holder;
if(convertView==null){
/****** Inflate tabitem.xml file for each row ( Defined below ) *******/
vi = inflater.inflate(R.layout.activity_single_message, null);
/****** View Holder Object to contain tabitem.xml file elements ******/
holder = new ViewHolder();
holder.chatText = (TextView) vi.findViewById(R.id.singleMessage);
holder.imageView=(ImageView)vi.findViewById(R.id.image);
holder.videoIcon=(ImageView)vi.findViewById(R.id.video_icon);
holder.singleMessageContainer=(LinearLayout)vi.findViewById(R.id.singleMessageContainer);
holder.singleMessageImageContainer=(LinearLayout)vi.findViewById(R.id.singleMessageImageContainer);
holder.dwnld_btn = (Button)vi.findViewById(R.id.download_btn);
/************ Set holder with LayoutInflater ************/
vi.setTag( holder );
}
else
holder=(ViewHolder)vi.getTag();
if(data.size()<=0)
{
holder.chatText.setText("Start new conversation!");
}
else
{
/***** Get each Model object from Arraylist ********/
tempValues=null;
tempValues = (ChatMessage) data.get(position);
//Toast.makeText(activity, "MimeType = " + tempValues.getMessageText(), Toast.LENGTH_LONG).show();
String path = tempValues.getMediaURL();
String mediaMIMEType = tempValues.getMediaMIMEType();
int isDownload = tempValues.getIsDownloaded();
String senderUserInfoId = tempValues.getSenderUserInfoId();
if(!tempValues.getSenderUserInfoId().equals(loginUserInfoId) && mediaMIMEType.contains("IMAGE"))
{
holder.chatText.setPadding(30,10,10,10);
holder.chatText.setMaxWidth(550);
holder.chatText.setBackgroundResource(R.drawable.chat_rightpng);
holder.chatText.setTextColor(Color.parseColor("#FFFFFF"));//.setTextColor(R.color.white);
holder.chatText.setText(tempValues.getMessageText());
holder.singleMessageContainer.setGravity(true ? Gravity.LEFT : Gravity.RIGHT);
try {
holder.imageView.setVisibility(View.VISIBLE);
holder.videoIcon.setVisibility(View.GONE);
if(isDownload == 0) {
holder.dwnld_btn.setVisibility(View.VISIBLE);
holder.imageView.setPadding(10,10,10,10);
holder.imageView.setMaxWidth(450);
holder.imageView.setBackgroundColor(Color.parseColor("#005684"));
holder.imageView.setImageResource(R.drawable.blur);
}
else {
holder.dwnld_btn.setVisibility(View.GONE);
holder.imageView.setPadding(10,10,10,10);
holder.imageView.setMaxWidth(450);
holder.imageView.setMaxWidth(550);
holder.imageView.setBackgroundColor(Color.parseColor("#005684"));
holder.imageView.setImageDrawable(Drawable.createFromPath(path));
}
holder.singleMessageImageContainer.setGravity(true ? Gravity.LEFT : Gravity.RIGHT);
} catch(Exception e) {
//txtUrl.setText("Error: Exception");
}
}
} catch(Exception e) {
//txtUrl.setText("Error: Exception");
}
}
/******** Set Item Click Listner for LayoutInflater for each row *******/
holder.dwnld_btn.setOnClickListener(new OnDownloadBtnClickListener(position));
}
return vi;
}
Here is click function when I am clicking on download button
private class OnDownloadBtnClickListener implements View.OnClickListener {
private int mPosition;
OnDownloadBtnClickListener(int position){
mPosition = position;
}
@Override
public void onClick(View arg0) {
final ChatMessage val = ( ChatMessage ) data.get(mPosition);
if(isInternetOn()) {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
downlodedMsgId = val.getId();
if (val.getMediaMIMEType().contains("IMAGE")) {
localFileURL = Environment.getExternalStorageDirectory() + File.separator + "/Planetskool/Media/Images/IMG_" + timeStamp + ".png";
new DownloadFileFromURL().execute(val.getOnlineMediaURL());
}
}
}
Here is async method to download a file where in OnPostExecute I want to change the source of imageview
class DownloadFileFromURL extends AsyncTask<String, String, String> {
/**
* Before starting background thread
* Show Progress Bar Dialog
* */
@Override
protected void onPreExecute() {
progressDialog = new ProgressDialog(activity);
progressDialog.setMessage("Downloading file. Please wait...");
progressDialog.setIndeterminate(false);
progressDialog.setMax(100);
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressDialog.setCancelable(true);
progressDialog.show();
super.onPreExecute();
}
/**
* Downloading file in background thread
* */
@Override
protected String doInBackground(String... f_url) {
int count;
try {
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
// getting file length
int lenghtOfFile = conection.getContentLength();
// input stream to read file - with 8k buffer
InputStream input = new BufferedInputStream(url.openStream(), 8192);
// Output stream to write file
OutputStream output = new FileOutputStream(localFileURL);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
// After this onProgressUpdate will be called
publishProgress(""+(int)((total*100)/lenghtOfFile));
// writing data to file
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
/**
* Updating progress bar
* */
protected void onProgressUpdate(String... progress) {
progressDialog.setProgress(Integer.parseInt(progress[0]));
}
/**
* After completing background task
* Dismiss the progress dialog
* **/
@Override
protected void onPostExecute(String file_url) {
db.updateDownlodedPath(downlodedMsgId, localFileURL);
updateResults(data);
localFileURL = "";
downlodedMsgId = 0;
progressDialog.dismiss();
}
}
change your clickListner as
@Override
public void onClick(View arg0) {
final ChatMessage val = ( ChatMessage ) data.get(mPosition);
if(isInternetOn()) {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
downlodedMsgId = val.getId();
if (val.getMediaMIMEType().contains("IMAGE")) {
localFileURL = Environment.getExternalStorageDirectory() + File.separator + "/Planetskool/Media/Images/IMG_" + timeStamp + ".png";
new DownloadFileFromURL(position).execute(val.getOnlineMediaURL());
}
}
and create constructor in AsyncTask as
class DownloadFileFromURL(int mPosition){
//get your imageViewByPosition here and change the url in OnPostExecute Method
}