I want to load images in gallery view in a manner that once images is load than after when user scrolls, want to show loading indicator and than after new image will be display. in my below code it takes all the data(including images) and display.
here is my code:
ProductDetailsActivity.java
public class ProductsDetailActivity extends BaseActivity implements
OnClickListener, OnItemSelectedListener {
Gallery gallery;
TextView prod_descri, productTitle1, productTitle2;
ImageAdapter imageAdapter;
ImageView leftArrow, rightArrow;
private int selectedImagePosition = 0;
private List<Drawable> drawables;
String title, url, title1;
Bundle b;
Products product;
ProductDetails pDetails;
ArrayList<ProductDetails> productList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.products_details);
init();
setTitle(getResources().getString(R.string.title_product));
b = getIntent().getExtras();
product = (Products) b.getSerializable("product");
if (b != null) {
if (Global.isNetworkAvailable(ProductsDetailActivity.this)) {
new ProductAsyncTask().execute(Constants.url,
product.product_id);
} else {
Intent intent = new Intent(ProductsDetailActivity.this,
OfflineActivity.class);
startActivity(intent);
}
} else {
Log.v("Bundle", "Bundle null");
}
}
private void init() {
productList = new ArrayList<ProductDetails>();
gallery = (Gallery) findViewById(R.id.product_gallery);
prod_descri = (TextView) findViewById(R.id.product_desc);
productTitle1 = (TextView) findViewById(R.id.productTitle1);
productTitle2 = (TextView) findViewById(R.id.productTitle2);
leftArrow = (ImageView) findViewById(R.id.left_arrow_imageview);
rightArrow = (ImageView) findViewById(R.id.right_arrow_imageview);
leftArrow.setOnClickListener(this);
rightArrow.setOnClickListener(this);
gallery.setOnItemSelectedListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.left_arrow_imageview:
if (selectedImagePosition > 0) {
// leftArrow.setVisibility(View.VISIBLE);
--selectedImagePosition;
} else if (selectedImagePosition == 0) {
leftArrow.setVisibility(View.INVISIBLE);
rightArrow.setVisibility(View.VISIBLE);
}
gallery.setSelection(selectedImagePosition, true);
break;
case R.id.right_arrow_imageview:
if (selectedImagePosition < drawables.size() - 1) {
// rightArrow.setVisibility(View.VISIBLE);
++selectedImagePosition;
} else if (selectedImagePosition == drawables.size() - 1) {
rightArrow.setVisibility(View.INVISIBLE);
leftArrow.setVisibility(View.VISIBLE);
}
gallery.setSelection(selectedImagePosition, true);
break;
default:
break;
}
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
long id) {
selectedImagePosition = position;
productTitle1.setText(product.title);
productTitle2.setText(product.title);
prod_descri.setText(product.long_description);
if (selectedImagePosition > 0
&& selectedImagePosition < drawables.size() - 1) {
leftArrow.setVisibility(View.VISIBLE);
rightArrow.setVisibility(View.VISIBLE);
} else if (selectedImagePosition == 0 && drawables.size() > 1) {
leftArrow.setVisibility(View.INVISIBLE);
rightArrow.setVisibility(View.VISIBLE);
} else if (selectedImagePosition == drawables.size() - 1
&& drawables.size() > 1) {
rightArrow.setVisibility(View.INVISIBLE);
leftArrow.setVisibility(View.VISIBLE);
} else if (drawables.size() == 1) {
rightArrow.setVisibility(View.INVISIBLE);
leftArrow.setVisibility(View.INVISIBLE);
}
// setSelectedImage(selectedImagePosition);
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
// AsyncTask
public class ProductAsyncTask extends
AsyncTask<String, String, ArrayList<ProductDetails>> {
private Context getDialogContext() {
Context context;
if (getParent() != null)
context = getParent();
else
context = ProductsDetailActivity.this;
return context;
}
String responseString = null;
ProgressDialog progressDialog;
public ProductAsyncTask() {
super();
// progressDialog = new ProgressDialog(ProductsDetailActivity.this);
progressDialog = new ProgressDialog(getDialogContext());
progressDialog.setCancelable(false);
}
@Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog.setMessage("Loading...");
progressDialog.show();
}
@Override
protected ArrayList<ProductDetails> doInBackground(String... params) {
responseString = readJSONSFeed(params[0], params[1]);
if (responseString != null) {
return processProductDetailsJSON(responseString);
} else {
return null;
}
}
@Override
protected void onPostExecute(ArrayList<ProductDetails> result) {
super.onPostExecute(result);
try {
if (result.size() == 0 || result == null) {
}
progressDialog.dismiss();
drawables = createDrawables(result);
imageAdapter = new ImageAdapter(ProductsDetailActivity.this,
drawables);
if (drawables.size() > 0) {
gallery.setSelection(selectedImagePosition, true);
}
if (drawables.size() == 1) {
leftArrow.setVisibility(View.INVISIBLE);
rightArrow.setVisibility(View.INVISIBLE);
}
gallery.setAdapter(imageAdapter);
} catch (Exception e) {
e.printStackTrace();
}
}
private List<Drawable> createDrawables(ArrayList<ProductDetails> result) {
List<Drawable> drawablesUrl = new ArrayList<Drawable>();
try {
for (ProductDetails objProDetails : result) {
drawablesUrl.add(Global.getBitmapFromURL(
ProductsDetailActivity.this,
objProDetails.image_path));
// drawablesUrl.add(loadImageFromURL(objProDetails.image_path));
}
return drawablesUrl;
} catch (Exception e) {
return null;
}
}
@SuppressWarnings("unused")
private Drawable loadImageFromURL(String image_path) {
try {
InputStream is = (InputStream) new URL(url).getContent();
Drawable d = Drawable.createFromStream(is, "src name");
return d;
} catch (Exception e) {
return getResources().getDrawable(R.drawable.noimage);
}
}
private String readJSONSFeed(String url, String productID) {
StringBuilder stringBuilder = new StringBuilder();
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url + Constants.REQ_FOR_PRODUCT_IMAGE
+ productID + Constants.REQ_FOR_OFFER);
httpGet.setHeader("Content-Type", "application/json");
httpGet.setHeader("password", "password");
httpGet.setHeader("username", "user");
try {
HttpResponse response = httpClient.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statuscode = statusLine.getStatusCode();
if (statuscode == 200) {
HttpEntity httpEntity = response.getEntity();
InputStream inputStream = httpEntity.getContent();
BufferedReader buffer = new BufferedReader(
new InputStreamReader(inputStream));
String line = null;
if ((line = buffer.readLine()) != null) {
stringBuilder.append(line);
}
// buffer.close();
inputStream.close();
} else {
}
} catch (Exception e) {
}
return stringBuilder.toString();
}
private synchronized ArrayList<ProductDetails> processProductDetailsJSON(
String response) {
try {
JSONObject json = new JSONObject(response);
JSONArray Records = json
.getJSONArray(Constants.JSON_OBJECT_DATA);
for (int i = 0; i < Records.length(); i++) {
JSONObject Record = Records.getJSONObject(i);
String tTitle = Record.getString("title");
String tImagePath = Record.getString("image_path");
String tDescription = Record.getString("description");
tImagePath = Constants.REQ_IMAGE_PRODUCT + tImagePath;
pDetails = new ProductDetails(tDescription, tTitle,
tImagePath);
if (pDetails == null) {
} else {
productList.add(pDetails);
}
}
} catch (JSONException ex) {
System.out.println(ex);
return null;
}
return productList;
}
}
ImageAdapter.java
public class ImageAdapter extends BaseAdapter {
private Activity context;
ImageView imageView;
private List<Drawable> totalImages;
private static ViewHolder holder;
ArrayList<Object> imageGallery;
int width;
int height;
Display display;
int[] images = { R.drawable.ic_launcher, R.drawable.ic_launcher };
public ImageAdapter(Context c, List<Drawable> drawables) {
this.context = (Activity) c;
imageGallery = new ArrayList<Object>();
this.totalImages = drawables;
display = context.getWindowManager().getDefaultDisplay();
// this.imageGallery = objects;
// width = display.getWidth();
// height = display.getHeight();
}
@Override
public int getCount() {
return totalImages.size();
// return 1;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
try {
if (convertView == null) {
holder = new ViewHolder();
imageView = new ImageView(this.context);
convertView = imageView;
holder.imageView = imageView;
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.imageView.setImageDrawable(totalImages.get(position));
holder.imageView.setLayoutParams(new Gallery.LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT));
holder.imageView.setScaleType(ImageView.ScaleType.FIT_XY);
return imageView;
} catch (Exception e) {
e.printStackTrace();
return imageView;
}
}
static class ViewHolder {
public ViewHolder() {
}
ImageView imageView;
}
}
Here is my CustomArrayAdapter
CustomArrayAdapter.java
public class CustomArrayAdapter extends ArrayAdapter<Object> {
Context mContext;
ArrayList<Products> product;
int layoutId;
ImageLoader imageLoader;
public CustomArrayAdapter(Context context, int textViewResourceId,
ArrayList<Products> objects) {
super(context, textViewResourceId);
this.mContext = context;
this.layoutId = textViewResourceId;
this.product = objects;
imageLoader = new ImageLoader(context, R.drawable.noimage);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
LayoutInflater layoutInflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(layoutId, parent, false);
holder = new ViewHolder(convertView);
holder.setValues(product.get(position));
return convertView;
}
public int getCount() {
return product.size();
}
public class ViewHolder {
TextView tvProductTitle;
TextView tvProductDescription;
ImageView ivProductLogo, imgArrow;
public ProgressBar progress;
public ViewHolder(View v) {
tvProductTitle = (TextView) v.findViewById(R.id.tvTitle);
tvProductDescription = (TextView) v
.findViewById(R.id.tvDescriptions);
ivProductLogo = (ImageView) v.findViewById(R.id.ivLogoProduct);
imgArrow = (ImageView) v.findViewById(R.id.imgArrow);
progress = (ProgressBar) v.findViewById(R.id.progress_bar);
}
public void setValues(Products products) {
tvProductTitle.setText(products.title);
tvProductDescription.setText(products.short_description);
// imageLoader.displayImage(products.image, imageView, options);
try {
ImageLoader imageLoader = new ImageLoader(mContext);
DisplayImageOptions options = new DisplayImageOptions.Builder()
.cacheOnDisc().build();
imageLoader.DisplayImage(products.image, ivProductLogo);
if (Global.fromProduct) {
imgArrow.setImageDrawable(mContext.getResources().getDrawable(R.drawable.cell_arrow_right));
} else {
imgArrow.setImageDrawable(mContext.getResources().getDrawable(R.drawable.info_btn));
}
} catch (Exception e) {
e.printStackTrace();
}
// try {
}
@SuppressWarnings("unused")
private boolean cancelPotentialDownload(String url, ImageView imageView) {
BitmapDownloaderTask bitmapDownloaderTask = getBitmapDownloaderTask(imageView);
if (bitmapDownloaderTask != null) {
String bitmapUrl = bitmapDownloaderTask.url;
if ((bitmapUrl == null) || (!bitmapUrl.equals(url))) {
bitmapDownloaderTask.cancel(true);
} else {
// The same URL is already being downloaded.
return false;
}
}
return true;
}
private BitmapDownloaderTask getBitmapDownloaderTask(ImageView imageView) {
if (imageView != null) {
Drawable drawable = imageView.getDrawable();
if (drawable instanceof DownloadedDrawable) {
DownloadedDrawable downloadedDrawable = (DownloadedDrawable) drawable;
return downloadedDrawable.getBitmapDownloaderTask();
}
}
return null;
}
}
}'
