Develop Reference

List view showing images jumbled after downloading images using asynctask

I have used the async task to download the data and then showing those images in the list view I used the cache to store the images as they are repeating but not in an order. But the images gets jumbled up and sometimes they don't download. I tried searching this, but couldn't find that.
This was one of mine dream company question and i didn't clear because of this.
Please help me around.
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private static final String BASE_URL = "https://ajax.googleapis.com/ajax/services/search/images?v=1.0&q=android&start=";
private static final String IMAGE_JSON_KEY = "unescapedUrl";
private static final String RESULTS_JSON_KEY = "results";
private static final String RESPONSE_DATA_JSON_KEY = "responseData";
private int mCurrentPage;
private ListView mListView;
private Context mContext;
ArrayList<String> mImageUrls;
private LruCache<String, Bitmap> mCache;
private CustomListAdapter mAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Get memory class of this device, exceeding this amount will throw an
// OutOfMemory exception.
final int memClass = ((ActivityManager) getSystemService(Context.ACTIVITY_SERVICE)).getMemoryClass();
// Use 1/8th of the available memory for this memory cache.
final int cacheSize = 1024 * 1024 * memClass / 8;
// Initialize variables
mContext = this;
mCache = new LruCache<String, Bitmap>(cacheSize) {
#Override
protected int sizeOf(String key, Bitmap value) {
// The cache size will be measured in bytes rather than number of items.
return value.getByteCount();
}
};
mListView = (ListView) findViewById(R.id.list_view);
mAdapter = new CustomListAdapter();
mImageUrls = new ArrayList<>();
// If the urls are wrong then
if (mImageUrls.isEmpty() || checkDiff()) {
fetchNewImageUrls();
}
// Set the adapter to the list view
mListView.setAdapter(mAdapter);
}
class BitmapWorkerTask extends AsyncTask<String, Void, Bitmap> {
private final WeakReference<ImageView> imageViewReference;
private String mUrl;
public BitmapWorkerTask(ImageView imageView) {
// Use a WeakReference to ensure the ImageView can be garbage collected
imageViewReference = new WeakReference<ImageView>(imageView);
}
#Override
protected Bitmap doInBackground(String... params) {
String imageUrl = params[0];
mUrl = imageUrl;
Bitmap bitmap = getBitmapFromMemCache(imageUrl);
if (bitmap == null) {
try {
URL url = new URL(imageUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
// Closing the stream after getting the sample size
InputStream inputStream = connection.getInputStream();
byte[] imageByteArray = convertToByteArray(inputStream);
bitmap = decodeSampledBitmap(imageByteArray, 200, 200);
inputStream.close();
if (bitmap != null) {
Log.d(TAG, "Image downloaded: " + imageUrl);
addBitmapToMemoryCache(imageUrl, bitmap);
} else {
Log.d(TAG, "Null Bitmap downloaded for: " + imageUrl);
}
connection.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} else {
Log.d(TAG, "Already present in the Cache");
}
return bitmap;
}
#Override
protected void onPostExecute(Bitmap bitmap) {
if (imageViewReference != null && bitmap != null) {
final ImageView imageView = (ImageView) imageViewReference.get();
if (imageView != null && imageView.getTag().equals(mUrl)) {
imageView.setImageBitmap(bitmap);
}
}
}
}
public class CustomListAdapter extends BaseAdapter {
#Override
public int getCount() {
return mImageUrls.size();
}
#Override
public Object getItem(int position) {
return mImageUrls.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
Log.d(TAG, "Get View is called for position: " + position);
View view = convertView;
Holder holder = null;
// Holder represents the elements of the view to use
// Here are initialized
if (view == null) {
view = LayoutInflater.from(mContext).inflate(R.layout.row_item, parent, false);
holder = new Holder();
holder.mRowImage = (ImageView) view.findViewById(R.id.image_view);
holder.mRowText = (TextView) view.findViewById(R.id.row_text);
view.setTag(holder);
} else {
holder = (Holder) view.getTag();
}
// Set default image background
holder.mRowImage.setImageResource(R.drawable.ic_launcher);
// here do operations in holder variable example
holder.mRowText.setText("Image Number: " + position);
// Set the tag for the imageview
holder.mRowImage.setTag(mImageUrls.get(position));
new BitmapWorkerTask(holder.mRowImage).execute(mImageUrls.get(position));
return view;
}
}
public static class Holder {
TextView mRowText;
ImageView mRowImage;
}
public void addBitmapToMemoryCache(String key, Bitmap bitmap) {
if (getBitmapFromMemCache(key) == null) {
mCache.put(key, bitmap);
}
}
public Bitmap getBitmapFromMemCache(String key) {
return (Bitmap) mCache.get(key);
}
public Bitmap decodeSampledBitmap(byte[] imageByteArray, int reqWidth, int reqHeight) {
Bitmap bm = null;
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeByteArray(imageByteArray, 0, imageByteArray.length, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
options.inJustDecodeBounds = false;
bm = BitmapFactory.decodeByteArray(imageByteArray, 0, imageByteArray.length, options);
return bm;
}
public int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
if (width > height) {
inSampleSize = Math.round((float) height / (float) reqHeight);
} else {
inSampleSize = Math.round((float) width / (float) reqWidth);
}
}
Log.d(TAG, "Sample size is: " + inSampleSize);
return inSampleSize;
}
private void fetchNewImageUrls() {
new AsyncTask<String, Void, Boolean>() {
#Override
protected Boolean doInBackground(String... params) {
try {
StringBuilder response = new StringBuilder();
URL url = new URL(params[0]);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.connect();
BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null)
response.append(inputLine);
in.close();
connection.disconnect();
String resp = response.toString();
Log.d(TAG, "Response is: " + response);
// Parsing the response
JSONObject jsonObject = new JSONObject(resp);
JSONObject jsonObject1 = jsonObject.getJSONObject(RESPONSE_DATA_JSON_KEY);
JSONArray jsonArray = jsonObject1.getJSONArray(RESULTS_JSON_KEY);
for (int i = 0; i < 4; i++) {
JSONObject dataObject = jsonArray.getJSONObject(i);
mImageUrls.add(dataObject.getString(IMAGE_JSON_KEY));
}
mCurrentPage++;
Log.d(TAG, "Number of image urls are: " + mImageUrls.size());
return true;
} catch (JSONException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
#Override
protected void onPostExecute(Boolean value) {
super.onPostExecute(value);
if (checkDiff() && value) {
Log.d(TAG, "Again fetching the Images");
fetchNewImageUrls();
}
if (!value) {
Log.d(TAG, "Error while getting the response");
}
mAdapter.notifyDataSetChanged();
}
}.execute(BASE_URL + mCurrentPage);
}
private boolean checkDiff() {
int diff = mImageUrls.size() - mCurrentPage * 4;
Log.d(TAG, "Diff is: " + diff);
return diff < 8;
}
public static byte[] convertToByteArray(InputStream input) {
byte[] buffer = new byte[8192];
int bytesRead;
ByteArrayOutputStream output = new ByteArrayOutputStream();
try {
while ((bytesRead = input.read(buffer)) != -1) {
output.write(buffer, 0, bytesRead);
}
} catch (IOException e) {
e.printStackTrace();
}
return output.toByteArray();
}
}

Since you do not cancel the unfinished "out of view" downloads these may interfere with your gui.
Example
listview line1 shows item#1 with has an async task to download image "a" not completed yet
scroll down, line1 is now invisible;
listview line8 becomes visible recycling item#1 new async task to download image "x"
async task to download image "a" finishes displaying wrong image. Line8 shows image "a" instead of "x"
to solve this you have to cancel the pending unnecessary unfinished async task-s
public static class Holder {
ImageView mRowImage;
String mImageUrl;
// neccessary to cancel unfinished download
BitmapWorkerTask mDownloader;
}
static class BitmapWorkerTask extends AsyncTask<Holder, Void, Bitmap> {
Holder mHolder;
protected Bitmap doInBackground(Holder... holders) {
mHolder = holders[0];
...
}
protected void onPostExecute(...) {
mHolder.mDownloader = null;
if (!isCancelled()) {
this.mHolder.mRowImage.setImageBitmap(image);
}
this.mHolder = null;
}
}
public class CustomListAdapter extends BaseAdapter {
#Override
public View getView(int position, ...) {
...
if (view == null) {
holder = ...
...
} else {
holder = (Holder) view.getTag();
}
...
// cancel unfinished mDownloader
if (holder.mDownloader != null) {
holder.mDownloader.cancel(false);
holder.mDownloader = null;
}
holder.mImageUrl = mImageUrls.get(position);
holder.mDownloader = new BitmapWorkerTask()
holder.mDownloader.execute(holder);
}
}
Here is a working example for this combination of Adapter + Holder + AsyncTask
[Update]
Potential problems with this solution.
Most modern android versions execute only one async task at a time. If you are fetching the images via the web you cannot download multible images at the same time. See running-parallel-asynctask#stackoverflow for details.
There may be promlems with configuration change(like orientation). See #Selvin-s comment below. I have posted this question "what-happens-with-view-references-in-unfinished-asynctask-after-orientation-chan#stackoverflow" to find out more about it.

Displaying Images from Sd Card but taking time in android

Hi in the below I am displaying images from sdcard.sdcard means storing into locally.but while privew the images it was showing some black color after image got displaying.
want to display smooth preview with black screen.i am unable to figure out the issue.can any one help me.
java
public class ImageGallery extends Activity {
Bundle bundle;
String catid, temp, responseJson;
JSONObject json;
ImageView imageViewPager;
// for parsing
JSONObject o1, o2;
JSONArray a1, a2;
int k;
Boolean toggleTopBar;
ArrayList<String> imageThumbnails;
ArrayList<String> imageFull;
public static int imagePosition=0;
SubsamplingScaleImageView imageView, imageViewPreview, fullImage ;
ImageView thumb1, back;
private LinearLayout thumb2;
RelativeLayout topLayout, stripeView;
RelativeLayout thumbnailButtons;
FrameLayout gridFrame;
//SharedPreferences data
SharedPreferences s1;
SharedPreferences.Editor editor;
int swipeCounter;
ParsingForFinalImages parsingObject;
int position_grid;
SharedPreferences p;
Bitmap bm;
int numOfImagesInsidee;
LinearLayout backLinLayout;
public static boolean isThumb2=false;
public static boolean isThumb1=false;
public static ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_gallery);
//isThumb2=false;
toggleTopBar = false;
//position_grid=getIntent().getExtras().getInt("position");
thumbnailButtons = (RelativeLayout)findViewById(R.id.thumbnailButtons);
topLayout = (RelativeLayout)findViewById(R.id.topLayout);
//fullImage = (SubsamplingScaleImageView)findViewById(R.id.fullimage);
backLinLayout = (LinearLayout)findViewById(R.id.lin_back);
backLinLayout.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent io = new Intent(getBaseContext(), MainActivity.class);
// clear the previous activity and start a new task
// System.gc();
// io.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(io);
finish();
}
});
ConnectionDetector cd = new ConnectionDetector(getBaseContext());
Boolean isInternetPresent = cd.isConnectingToInternet();
thumb1 = (ImageView)findViewById(R.id.thumb1);
thumb2 = (LinearLayout)findViewById(R.id.thumb2);
stripeView = (RelativeLayout)findViewById(R.id.stripeView) ;
gridFrame = (FrameLayout)findViewById(R.id.gridFrame);
thumb1.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
stripeView.setVisibility(View.GONE);
gridFrame.setVisibility(View.VISIBLE);
viewPager.setVisibility(View.GONE);
//fullImage.setVisibility(View.GONE);
thumb1.setClickable(false);
isThumb1=true;
isThumb2=false;
Log.i("Thumb Position 1",""+ImageGallery.imagePosition);
viewPager.removeAllViews();
Fragment newFragment = new GridFragment2();
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.gridFrame, newFragment).commit();
}
});
thumb2.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
// stripeView.setVisibility(View.VISIBLE);
stripeView.setVisibility(View.GONE);
gridFrame.setVisibility(View.VISIBLE);
viewPager.setVisibility(View.GONE);
// fullImage.setVisibility(View.GONE);
thumb1.setClickable(true);
isThumb2=true;
isThumb1=false;
Log.i("Thumb Position 2",""+ImageGallery.imagePosition);
viewPager.removeAllViews();
Fragment newFragment = new ImageStripeFragment();
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.gridFrame, newFragment).commit();
}
});
// allow networking on main thread
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
/*bundle = getIntent().getExtras();
catid = bundle.getString("catid");*/
// Toast.makeText(getBaseContext(), catid, Toast.LENGTH_LONG).show();
// making json using the catalogue id we got
p = getSharedPreferences("gridData", Context.MODE_APPEND);
catid = p.getString("SelectedCatalogueIdFromGrid1", "");
int clickedListPos = p.getInt("clickedPosition", 0);
imageViewPreview = (SubsamplingScaleImageView)findViewById(R.id.preview);
imageThumbnails = new ArrayList<String>();
imageFull = new ArrayList<String>();
s1 = this.getSharedPreferences("data", Context.MODE_APPEND);
editor = s1.edit();
Log.d("catidfnl", catid);
numOfImagesInsidee = p.getInt("numberOfItemsSelectedFromGrid1", 0);
Log.d("blingbling2", String.valueOf(numOfImagesInsidee));
// adding downloaded images to arraylist
for(int m=0;m<numOfImagesInsidee;m++){
imageThumbnails.add(Environment.getExternalStorageDirectory()+"/"+"thumbImage" + catid + m+".png");
imageFull.add(Environment.getExternalStorageDirectory()+"/"+"fullImage" + catid + m+".png");
// imageFull.add("file://" + Environment.getExternalStorageDirectory() + "/" + "fullImage32.png");
}
viewPager = (ViewPager) findViewById(R.id.pager);
ImagePagerAdapter adapter = new ImagePagerAdapter();
viewPager.setAdapter(adapter);
// SubsamplingScaleImageView fullImage = new SubsamplingScaleImageView(ImageGallery.this);
// code to display image in a horizontal strip starts here
LinearLayout layout = (LinearLayout) findViewById(R.id.linear);
for (int i = 0; i < imageThumbnails.size(); i++) {
imageView = new SubsamplingScaleImageView(this);
imageView.setId(i);
imageView.setPadding(2, 2, 2, 2);
// Picasso.with(this).load("file://"+imageThumbnails.get(i)).into(imageView);
// imageView.setScaleType(ImageView.ScaleType.FIT_XY);
layout.addView(imageView);
ViewGroup.LayoutParams params = imageView.getLayoutParams();
params.width = 200;
params.height = 200;
imageView.setLayoutParams(params);
imageView.setZoomEnabled(false);
imageView.setDoubleTapZoomScale(0);
imageView.setImage(ImageSource.uri(imageThumbnails.get(0)));
imageView.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
imageView.setZoomEnabled(false);
imageViewPreview.setImage(ImageSource.uri(imageFull.get(view.getId())));
imageView.recycle();
imageViewPreview.recycle();
}
});
}
// code to display image in a horizontal strip ends here
imageViewPreview.setZoomEnabled(false);
/*imageViewPreview.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
imageViewPreview.setZoomEnabled(false);
stripeView.setVisibility(View.GONE);
gridFrame.setVisibility(View.GONE);
viewPager.setVisibility(View.VISIBLE);
}
});*/
imageViewPreview.setOnClickListener(new DoubleClickListener() {
#Override
public void onSingleClick(View v) {
Log.d("yo click", "single");
}
#Override
public void onDoubleClick(View v) {
Log.d("yo click", "double");
}
});
}
public abstract class DoubleClickListener implements View.OnClickListener {
private static final long DOUBLE_CLICK_TIME_DELTA = 300;//milliseconds
long lastClickTime = 0;
#Override
public void onClick(View v) {
long clickTime = System.currentTimeMillis();
if (clickTime - lastClickTime < DOUBLE_CLICK_TIME_DELTA){
onDoubleClick(v);
} else {
onSingleClick(v);
}
lastClickTime = clickTime;
}
public abstract void onSingleClick(View v);
public abstract void onDoubleClick(View v);
}
// #Override
// public void onBackPressed() {
// Intent io = new Intent(getBaseContext(), MainActivity.class);
// // clear the previous activity and start a new task
// super.onBackPressed();
// finish();
// // System.gc();
// // io.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
// startActivity(io);
// }
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_image_gallery, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private class ImagePagerAdapter extends PagerAdapter {
/* private int[] mImages = new int[] {
R.drawable.scroll3,
R.drawable.scroll1,
R.drawable.scroll2,
R.drawable.scroll4
};*/
/* private String[] description=new String[]
{
"One","two","three","four"
};
*/
#Override
public int getCount() {
Log.i("Image List Size", "" + imageFull.size());
return imageFull.size();
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == ((SubsamplingScaleImageView) object);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
Context context = ImageGallery.this;
SubsamplingScaleImageView fullImage = new SubsamplingScaleImageView(ImageGallery.this);
// for placeholder
// fullImage.setImage(ImageSource.resource(R.drawable.tan2x));
if(!GridFragment2.isSelectedGrid2&&!ImageStripeFragment.isImageStripe) {
imagePosition = position;
fullImage.setImage(ImageSource.uri(imageFull.get(imagePosition)));
}
/* else if(!ImageStripeFragment.isImageStripe)
{
imagePosition = position;
fullImage.setImage(ImageSource.uri(imageFull.get(imagePosition)));
}
else if(ImageStripeFragment.isImageStripe)
{
position=imagePosition;
viewPager.setCurrentItem(imagePosition);
fullImage.setImage(ImageSource.uri(imageFull.get(position)));
}*/
else
{
position=imagePosition;
viewPager.setCurrentItem(imagePosition);
fullImage.setImage(ImageSource.uri(imageFull.get(position)));
//viewPager.removeAllViews();
}
// ImageView imageViewPager = new ImageView(context);
// ImageView imageViewPager = new ImageView(getApplicationContext());
// SubsamplingScaleImageView fullImage = new SubsamplingScaleImageView(ImageGallery.this);
GridFragment2.isSelectedGrid2=false;
ImageStripeFragment.isImageStripe=false;
// Log.i("Image Resource", "" + ImageSource.uri(imageFull.get(position)));
// imageViewPager.setImageBitmap(BitmapFactory.decodeFile(imageFull.get(position)));
// imageViewPager.setImageBitmap(myBitmap);
// fullImage.setImage(ImageSource.bitmap(bmImg));
//imageView.setImageResource(Integer.parseInt(imageFull.get(position)));
/*int padding = context.getResources().getDimensionPixelSize(
R.dimen.padding_medium);
imageView.setPadding(padding, padding, padding, padding);*/
/*imageView.setScaleType(ImageView.ScaleType.CENTER);
imageView.setImageResource(Integer.parseInt(imageFull.get(position)));
if(position==3)
{
}*/
// Log.i("Image Position",""+position);
/*text.setText(description[position]);
Log.i("Text Position",""+position);*/
/*switch(position)
{
case 0:
String pos=String.valueOf(position);
text.setText(pos);
break;
case 1:
String pos1=String.valueOf(position);
text.setText(pos1);
break;
case 2:
String pos2=String.valueOf(position);
text.setText(pos2);
break;
case 3:
String pos3=String.valueOf(position);
text.setText(pos3);
break;
}*/
fullImage.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View view) {
if (toggleTopBar == false) {
// thumbnailButtons.setVisibility(View.GONE);
thumbnailButtons.animate()
.translationY(-2000)
.setDuration(1000)
.start();
toggleTopBar = true;
} else if (toggleTopBar == true) {
// thumbnailButtons.setVisibility(View.VISIBLE);
thumbnailButtons.animate()
.translationY(0)
.setDuration(1000)
.start();
toggleTopBar = false;
}
}
});
((ViewPager) container).addView(fullImage, 0);
return fullImage;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((SubsamplingScaleImageView) object);
}
/* #Override
public void destroyItem(View collection, int position, Object o) {
Log.d("DESTROY", "destroying view at position " + position);
View view = (View) o;
((ViewPager) collection).removeView(view);
view = null;
}*/
}
#Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish();
}

use this ImageLoader Class
public class ImageLoader {
MemoryCache memoryCache = new MemoryCache();
FileCache fileCache;
private Map<ImageView, String> imageViews = Collections
.synchronizedMap(new WeakHashMap<ImageView, String>());
ExecutorService executorService;
Handler handler = new Handler();// handler to display images in UI thread
int stub_id;
int widht;
public ImageLoader(Context context, int stub_idx) {
fileCache = new FileCache(context);
executorService = Executors.newFixedThreadPool(5);
stub_id = stub_idx;
}
public void DisplayImage(String url, ImageView imageView, int widht, ProgressBar bar) {
this.widht = widht;
imageViews.put(imageView, url);
Bitmap bitmap = memoryCache.get(url);
if (bitmap != null)
{
bar.setVisibility(View.GONE);
imageView.setImageBitmap(bitmap);
}
else {
queuePhoto(url, imageView, widht, bar);
imageView.setImageResource(stub_id);
}
}
private void queuePhoto(String url, ImageView imageView, int w, ProgressBar bar) {
PhotoToLoad p = new PhotoToLoad(url, imageView, bar);
executorService.submit(new PhotosLoader(p, w));
}
public Bitmap getBitmap(String url, int w) {
File f = fileCache.getFile(url);
// from SD cache
Bitmap b = decodeFile(f, w);
if (b != null)
return b;
// from web
try {
Bitmap bitmap = null;
URL imageUrl = new URL(url);
HttpURLConnection conn = (HttpURLConnection) imageUrl
.openConnection();
conn.setConnectTimeout(30000);
conn.setReadTimeout(30000);
conn.setInstanceFollowRedirects(true);
InputStream is = conn.getInputStream();
OutputStream os = new FileOutputStream(f);
Utils.CopyStream(is, os);
os.close();
conn.disconnect();
bitmap = decodeFile(f, w);
return bitmap;
} catch (Throwable ex) {
ex.printStackTrace();
if (ex instanceof OutOfMemoryError)
memoryCache.clear();
return null;
}
}
// decodes image and scales it to reduce memory consumption
private Bitmap decodeFile(File f, int w) {
try {
// decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
FileInputStream stream1 = new FileInputStream(f);
BitmapFactory.decodeStream(stream1, null, o);
stream1.close();
// Find the correct scale value. It should be the power of 2.
final int REQUIRED_SIZE = w;
System.out.println("screen wdth " + widht);
int width_tmp = o.outWidth, height_tmp = o.outHeight;
System.out.println("image with === " + width_tmp);
int scale = 1;
while (true) {
if (width_tmp / 2 < REQUIRED_SIZE
|| height_tmp / 2 < REQUIRED_SIZE)
break;
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
// decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
FileInputStream stream2 = new FileInputStream(f);
Bitmap bitmap = BitmapFactory.decodeStream(stream2, null, o2);
stream2.close();
return bitmap;
}
catch (FileNotFoundException e) {
Log.e(e.getMessage(), "");
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
// Task for the queue
private class PhotoToLoad {
public String url;
public ImageView imageView;
public ProgressBar bar;
public PhotoToLoad(String u, ImageView i, ProgressBar progressBar) {
url = u;
imageView = i;
bar = progressBar;
}
}
class PhotosLoader implements Runnable {
PhotoToLoad photoToLoad;
int w;
PhotosLoader(PhotoToLoad photoToLoad, int w) {
this.photoToLoad = photoToLoad;
this.w = w;
}
#Override
public void run() {
try {
if (imageViewReused(photoToLoad))
return;
Bitmap bmp = getBitmap(photoToLoad.url, w);
memoryCache.put(photoToLoad.url, bmp);
if (imageViewReused(photoToLoad))
return;
BitmapDisplayer bd = new BitmapDisplayer(bmp, photoToLoad);
handler.post(bd);
} catch (Throwable th) {
th.printStackTrace();
}
}
}
boolean imageViewReused(PhotoToLoad photoToLoad) {
String tag = imageViews.get(photoToLoad.imageView);
return tag == null || !tag.equals(photoToLoad.url);
}
// Used to display bitmap in the UI thread
class BitmapDisplayer implements Runnable {
Bitmap bitmap;
PhotoToLoad photoToLoad;
public BitmapDisplayer(Bitmap b, PhotoToLoad p) {
bitmap = b;
photoToLoad = p;
}
public void run() {
if (imageViewReused(photoToLoad))
return;
if (bitmap != null)
photoToLoad.imageView.setImageBitmap(bitmap);
else
photoToLoad.imageView.setImageResource(stub_id);
photoToLoad.bar.setVisibility(View.GONE);
}
}
public void clearCache() {
memoryCache.clear();
fileCache.clear();
}
Then make new class for File cache
public class FileCache {
private File cacheDir;
public FileCache(Context context) {
// Find the dir to save cached images
if (android.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED))
cacheDir = new File(
android.os.Environment.getExternalStorageDirectory(),
"LazyList");
else
//cacheDir = url.getCacheDir();
if (!cacheDir.exists())
cacheDir.mkdirs();
}
public File getFile(String url) {
// I identify images by hashcode. Not a perfect solution, good for the
// demo.
String filename = String.valueOf(url.hashCode());
// Another possible solution (thanks to grantland)
// String filename = URLEncoder.encode(url);
File f = new File(cacheDir, filename);
return f;
}
public void clear() {
File[] files = cacheDir.listFiles();
if (files == null)
return;
for (File f : files)
f.delete();
}
}
Then last make Memory cache class , all three seperatly class
public class MemoryCache {
private static final String TAG = "MemoryCache";
private Map<String, Bitmap> cache=Collections.synchronizedMap(
new LinkedHashMap<String, Bitmap>(10,1.5f,true));//Last argument true for LRU ordering
private long size=0;//current allocated size
private long limit=1000000;//max memory in bytes
public MemoryCache(){
//use 25% of available heap size
setLimit(Runtime.getRuntime().maxMemory()/4);
}
public void setLimit(long new_limit){
limit=new_limit;
Log.i(TAG, "MemoryCache will use up to "+limit/1024./1024.+"MB");
}
public Bitmap get(String id){
try{
if(!cache.containsKey(id))
return null;
//NullPointerException sometimes happen here http://code.google.com/p/osmdroid/issues/detail?id=78
return cache.get(id);
}catch(NullPointerException ex){
ex.printStackTrace();
return null;
}
}
public void put(String id, Bitmap bitmap){
try{
if(cache.containsKey(id))
size-=getSizeInBytes(cache.get(id));
cache.put(id, bitmap);
size+=getSizeInBytes(bitmap);
checkSize();
}catch(Throwable th){
th.printStackTrace();
}
}
private void checkSize() {
Log.i(TAG, "cache size="+size+" length="+cache.size());
if(size>limit){
Iterator<Entry<String, Bitmap>> iter=cache.entrySet().iterator();//least recently accessed item will be the first one iterated
while(iter.hasNext()){
Entry<String, Bitmap> entry=iter.next();
size-=getSizeInBytes(entry.getValue());
iter.remove();
if(size<=limit)
break;
}
Log.i(TAG, "Clean cache. New size "+cache.size());
}
}
public void clear() {
try{
//NullPointerException sometimes happen here http://code.google.com/p/osmdroid/issues/detail?id=78
cache.clear();
size=0;
}catch(NullPointerException ex){
ex.printStackTrace();
}
}
long getSizeInBytes(Bitmap bitmap) {
if(bitmap==null)
return 0;
return bitmap.getRowBytes() * bitmap.getHeight();
}

Whitespaces in a TextView

I use this parser for downloading images to textview by Html.fromHtml():
public class URLImageParser implements Html.ImageGetter {
Context c;
TextView container;
Activity a;
int intrinsicHeight;
int intrinsicWidth;
boolean finishedExecuting;
public int getCounterImages() {
return counterImages;
}
public void setCounterImages(int counterImages) {
this.counterImages = counterImages;
}
public URLImageParser(TextView t, Context c, Activity a) {
this.c = c;
this.container = t;
this.a = a;
intrinsicHeight =0;
intrinsicWidth = 0;
finishedExecuting = false;
}
public Drawable getDrawable(String source) {
URLDrawable urlDrawable = new URLDrawable();
ImageGetterAsyncTask asyncTask =
new ImageGetterAsyncTask( urlDrawable);
asyncTask.execute(source);
return urlDrawable;
}
public class ImageGetterAsyncTask extends AsyncTask<String, Void, Drawable> {
URLDrawable urlDrawable;
boolean usesImageNotFoundDrawable = false;
public ImageGetterAsyncTask(URLDrawable d) {
this.urlDrawable = d;
}
#Override
protected Drawable doInBackground(String... params) {
String source = params[0];
return fetchDrawable(source);
}
#Override
protected void onPostExecute(Drawable result) {
if(result ==null){
usesImageNotFoundDrawable = true;
//the drawable wasn't found so use the image not found
//png
result = a.getResources().getDrawable(R.drawable.image_not_found);
} else {
usesImageNotFoundDrawable = false;
}
assert result != null;
intrinsicHeight = result.getIntrinsicHeight();
intrinsicWidth = result.getIntrinsicWidth();
DisplayMetrics dm = new DisplayMetrics();
((WindowManager) c.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getMetrics(dm);
int width = dm.widthPixels -50;
int height = width * intrinsicHeight / intrinsicWidth;
result.setBounds(0, 0, width, height);
urlDrawable.setBounds(0, 0, width, height);
urlDrawable.drawable = result;
URLImageParser.this.container.invalidate();
URLImageParser.this.container.setHeight((URLImageParser.this.container.getHeight() + height));
URLImageParser.this.container.refreshDrawableState();
// Pre ICS
URLImageParser.this.container.setEllipsize(null);
setFinishedExecuting(true);
}
public Drawable fetchDrawable(String urlString) {
try {
InputStream is = fetch(urlString);
return Drawable.createFromStream(is, "src");
} catch (Exception e) {
return null;
}
}
private InputStream fetch(String urlString) throws MalformedURLException, IOException {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet request = new HttpGet(urlString);
HttpResponse response = httpClient.execute(request);
return response.getEntity().getContent();
}
}
public boolean getFinishedExecuting(){
return finishedExecuting;
}
public void setFinishedExecuting(boolean bool){
finishedExecuting = bool;
}
}
And everytime I get a good looking textview, but with additional white space in the end. I've tried to modify my formula, but it also didn't work in all textviews. How can I trim unnesecces rai height or whitespace from TextView in the end?

Using Picasso to solve OutOfMemoryError

I have seen many answers on this issue which has not worked so far for me, the best option I got was using a Picasso to solve this, I have imported the .jar but am getting an error on the code I was told to use, I get an error on this(context) in the following line of code, say (context) cannot be resolved to a variable
Picasso.with(context).load(myBitmap).into(imageView);
This is the lines of code that generates the error, which I intend solving using Picasso
File imgFile = new File(data.get(position).get("path"));
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
imageView.setImageBitmap(myBitmap);
This is my full code below
public class WidgetActivity extends Activity {
GridView grid;
Matrix matrix = new Matrix();
Bitmap rotateimage;
ArrayList<HashMap<String, String>> maplist = new ArrayList<HashMap<String,String>>();
LocalStorageHandler notedb;
ImageView iv_notes;
EditText content;
LinearLayout grid_layout;
AppWidgetManager appWidgetManager;
int n;
Intent i;
int s;
String[] tcolor;
public String path = "", name = "", color = "";
public void onCreate(Bundle os) {
super.onCreate(os);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.dialog_shownotes);
notedb = new LocalStorageHandler(WidgetActivity.this);
grid = (GridView) findViewById(R.id.grid);
iv_notes = (ImageView) findViewById(R.id.iv_note);
content = (EditText) findViewById(R.id.content);
grid_layout = (LinearLayout) findViewById(R.id.grid_layout);
i = getIntent();
n = i.getIntExtra("currentWidgetId", 1);
new getlist().execute();
}
class getlist extends AsyncTask<String, String, String> {
ArrayList<HashMap<String, String>> maplist = new ArrayList<HashMap<String, String>>();
#Override
public void onPreExecute() {
super.onPreExecute();
}
#Override
protected String doInBackground(String... arg) {
ArrayList<String> filepaths = new ArrayList<String>();
ArrayList<String> filenames = new ArrayList<String>();
Cursor dbCursor = notedb.get();
if (dbCursor.getCount() > 0) {
int noOfScorer = 0;
dbCursor.moveToFirst();
while ((!dbCursor.isAfterLast())
&& noOfScorer < dbCursor.getCount()) {
noOfScorer++;
try {
HashMap<String, String> items = new HashMap<String, String>();
filepaths.add(Environment.getExternalStorageDirectory()
+ "/360notes/" + dbCursor.getString(2));
filenames.add(dbCursor.getString(3));
items.put("path",
Environment.getExternalStorageDirectory()
+ "/360notes/" + dbCursor.getString(2));
items.put("name", dbCursor.getString(3));
items.put("time", dbCursor.getString(1));
items.put("id", dbCursor.getString(0));
items.put("color", dbCursor.getString(4));
maplist.add(items);
} catch (Exception e) {
e.printStackTrace();
}
dbCursor.moveToNext();
}
}
return null;
}
#Override
protected void onPostExecute(String unused) {
if (maplist.size() > 0) {
grid.setAdapter(new GridViewImageAdapter(WidgetActivity.this,
maplist));
}
}
}
public class GridViewImageAdapter extends BaseAdapter {
private Activity _activity;
ArrayList<String> _filenames = new ArrayList<String>();
private ArrayList<HashMap<String, String>> data = new ArrayList<HashMap<String, String>>();
public GridViewImageAdapter(Activity activity,
ArrayList<HashMap<String, String>> items) {
this._activity = activity;
data = items;
}
#Override
public int getCount() {
return data.size();
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView,
ViewGroup parent) {
LayoutInflater inflate = (LayoutInflater) _activity
.getSystemService(_activity.LAYOUT_INFLATER_SERVICE);
convertView = inflate.inflate(R.layout.show_image, null);
ImageView imageView = (ImageView) convertView
.findViewById(R.id.imgScreen);
TextView title = (TextView) convertView.findViewById(R.id.title);
try {
String[] tcolor = data.get(position).get("name").split(" / ");
title.setText(tcolor[0].trim());
title.setTextColor(Color.parseColor(tcolor[1].trim()));
if (tcolor[2].trim().equals("0")) {
String text = title.getText().toString();
SpannableString span = new SpannableString(text);
span.setSpan(new UnderlineSpan(), 0, span.length(), 0);
// title.setText(span);
} else if (tcolor[2].trim().equals("3")) {
// title.setTypeface(null, Typeface.BOLD);
String text = title.getText().toString();
SpannableString span = new SpannableString(text);
span.setSpan(new UnderlineSpan(), 0, span.length(), 0);
// title.setText(span);
} else if (tcolor[2].trim().equals("4")) {
// title.setTypeface(null, Typeface.ITALIC);
String text = title.getText().toString();
SpannableString span = new SpannableString(text);
span.setSpan(new UnderlineSpan(), 0, span.length(), 0);
// title.setText(span);
} else if (tcolor[2].trim().equals("1")) {
// title.setTypeface(null, Typeface.BOLD);
String text = title.getText().toString();
SpannableString span = new SpannableString(text);
span.removeSpan(text);
} else if (tcolor[2].trim().equals("2")) {
// title.setTypeface(null, Typeface.ITALIC);
String text = title.getText().toString();
SpannableString span = new SpannableString(text);
span.removeSpan(text);
} else {
String text = title.getText().toString();
SpannableString span = new SpannableString(text);
span.removeSpan(text);
}
} catch (IndexOutOfBoundsException e) {
// TODO: handle exception
}
// TODO: handle exception
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 4;
File imgFile = new File(data.get(position).get("path"));
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
imageView.setImageBitmap(myBitmap);
/*if (myBitmap != null && !myBitmap.isRecycled()) {
myBitmap.recycle();
myBitmap = null;
}*/
//myBitmap.recycle();
//myBitmap = null;
Picasso.with(context).load(myBitmap).into(imageView);
grid.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
grid.setVisibility(View.GONE);
// grid_layout.setVisibility(View.VISIBLE);
s = position;
path = data.get(position).get("path");
try {
tcolor = data.get(position).get("name").split(" / ");
name = tcolor[0].trim();
color = tcolor[1].trim();
} catch (IndexOutOfBoundsException e) {
name = "";
color = "#000000";
}
appWidgetManager = AppWidgetManager
.getInstance(WidgetActivity.this);
UnreadWidgetProvider.updateWidget(WidgetActivity.this,
appWidgetManager, n, path,
data.get(position).get("name"), color, s);
finish();
}
});
return convertView;
}
}
public void images(String path, String name, String color) {
try {
Bitmap bm;
try {
bm = decodeSampledBitmapFromResource(path);
ExifInterface exifReader = new ExifInterface(path);
int orientation = exifReader.getAttributeInt(
ExifInterface.TAG_ORIENTATION, -1);
if (orientation == ExifInterface.ORIENTATION_NORMAL) {
matrix.postRotate(360);
} else if (orientation == ExifInterface.ORIENTATION_ROTATE_90) {
// matrix.postRotate(90);
} else if (orientation == ExifInterface.ORIENTATION_ROTATE_180) {
// matrix.postRotate(180);
} else if (orientation == ExifInterface.ORIENTATION_ROTATE_270) {
// matrix.postRotate(270);
} else if (orientation == ExifInterface.ORIENTATION_UNDEFINED) {
// matrix.postRotate(90);
} else {
}
rotateimage = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
bm.getHeight(), matrix, true);
iv_notes.setImageBitmap(rotateimage);
content.setText(name);
content.setFocusable(false);
try {
String[] tcolor = name.split(" / ");
content.setText(tcolor[0].trim());
content.setTextColor(Color.parseColor(tcolor[1].trim()));
if (tcolor[2].trim().equals("0")) {
String text = content.getText().toString();
SpannableString span = new SpannableString(text);
span.setSpan(new UnderlineSpan(), 0, span.length(), 0);
// content.setText(span);
} else if (tcolor[2].trim().equals("3")) {
// content.setTypeface(null, Typeface.BOLD);
String text = content.getText().toString();
SpannableString span = new SpannableString(text);
span.setSpan(new UnderlineSpan(), 0, span.length(), 0);
// content.setText(span);
} else if (tcolor[2].trim().equals("4")) {
// content.setTypeface(null, Typeface.ITALIC);
String text = content.getText().toString();
SpannableString span = new SpannableString(text);
span.setSpan(new UnderlineSpan(), 0, span.length(), 0);
// content.setText(span);
} else if (tcolor[2].trim().equals("1")) {
// content.setTypeface(null, Typeface.BOLD);
String text = content.getText().toString();
SpannableString span = new SpannableString(text);
span.removeSpan(text);
} else if (tcolor[2].trim().equals("2")) {
// content.setTypeface(null, Typeface.ITALIC);
String text = content.getText().toString();
SpannableString span = new SpannableString(text);
span.removeSpan(text);
} else {
String text = content.getText().toString();
SpannableString span = new SpannableString(text);
span.removeSpan(text);
}
} catch (IndexOutOfBoundsException e) {
// TODO: handle exception
}
grid_layout.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
int i = grid.getCount();
Intent intentAlarm = new Intent(WidgetActivity.this,
WriteNotesActivity.class);
intentAlarm.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
| Intent.FLAG_ACTIVITY_SINGLE_TOP);
intentAlarm.putExtra("max", s);
startActivity(intentAlarm);
finish();
}
});
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} catch (Exception e) {
// finish();
}
}
public static Bitmap decodeSampledBitmapFromResource(String resId) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(resId, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, 400, 300);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(resId, options);
}
public static int calculateInSampleSize(BitmapFactory.Options options,
int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and
// keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
|| (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
}

This might help someone out there after several hours without an answer to this. I found a way of solving this without using Picasso in handling the outOfMemoryError. I added this line of code in my Manifest file.
android:largeHeap="true"
I added this to the entire application here as below:-
<application
android:icon="#drawable/ic_launcher"
android:largeHeap="true"
android:label="#string/app_name" >
android:largeHeap is the instrument for increasing your allocated memory to app.

EDIT:
well, you are using too much memory. remove those 3 lines of code :
File imgFile = new File(data.get(position).get("path"));
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
imageView.setImageBitmap(myBitmap);
simply, you are assigning too much space to these instances and your phone runs out of memory. Just use my response and consider logging the file path so you can possibly use that without creating another file.
i think you used wrong implementation. Probably the context is not adressing correctly and therefore, i would personally use "this" instead. And for loading resources, their guide provides us with three implementations, see below:
pass drawable
Picasso.with(context).load(R.drawable.landing_screen).into(imageView1);
pass uri
Picasso.with(context).load("file:///android_asset/DvpvklR.png").into(imageView2);
pass file
Picasso.with(context).load(new File(...)).into(imageView3);
so therefore i would decode the image using this code:
Picasso.with(this).load(new File(data.get(position).get("path"))).into(imageView);

Image is not displayed into curlview

I want to crate curlview with dynemic data. I used imageview to display image into curlview because my api contain image in data. but image is not displayed into imageview how i do this?
Below is my code.
public class CurlActivity extends Activity {
private CurlView mCurlView;
public String cid;
public ArrayList<String>magazineidlist;
public String middata;
public String url;
public String imgurl;
public Bitmap bitmap;
public ImageLoader imageloder;
public ImageView imageView;
public ArrayList<String>imageurllist;
public GridImageAdapter gadapter;
public CurlActivity c;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_curl);
gadapter = new GridImageAdapter(c, imageurllist);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
getAllMagazineById();
Intent intent = getIntent();
Bundle bundle = intent.getExtras();
if(bundle!=null){
cid = bundle.getString("mid");
Log.d("magazine id", cid);
}
int index = 0;
if (getLastNonConfigurationInstance() != null) {
index = (Integer) getLastNonConfigurationInstance();
}
mCurlView = (CurlView) findViewById(R.id.curl);
}
#Override
public void onPause() {
super.onPause();
mCurlView.onPause();
}
#Override
public void onResume() {
super.onResume();
mCurlView.onResume();
}
#Override
public Object onRetainNonConfigurationInstance() {
return mCurlView.getCurrentIndex();
}
/**
* Bitmap provider.
*/
private class PageProvider implements CurlView.PageProvider {
// Bitmap resources.
private int[] mBitmapIds = { R.layout.sample};
//LinearLayout llout = (LinearLayout) findViewById(R.layout.sample);
#SuppressWarnings("unused")
//ImageView imageView = (ImageView) findViewById(R.id.imageviewsample);
#Override
public int getPageCount() {
return imageurllist.size();
}
private Bitmap loadBitmap(int width, int height, int index) {
LayoutInflater inflater =
(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Log.d("index",String.valueOf(index));
View v = inflater.inflate(mBitmapIds[index],null);
v.measure(
MeasureSpec.makeMeasureSpec(width,MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
Bitmap b = Bitmap.createBitmap(v.getWidth(), v.getHeight()
,Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.draw(c);
return b;
}
#Override
public void updatePage(CurlPage page, int width, int height, int index) {
switch (index) {
// First case is image on front side, solid colored back.
default:
Bitmap front = loadBitmap(width, height, 0);
page.setTexture(front, CurlPage.SIDE_FRONT);
page.setColor(Color.rgb(180, 180, 180), CurlPage.SIDE_BACK);
break;
/*// Third case is images on both sides.
case 2: {
Bitmap front = loadBitmap(width, height, 1);
Bitmap back = loadBitmap(width, height, 3);
page.setTexture(front, CurlPage.SIDE_FRONT);
page.setTexture(back, CurlPage.SIDE_BACK);
break;
}
// Fourth case is images on both sides - plus they are blend against
// separate colors.
case 3: {
Bitmap front = loadBitmap(width, height, 2);
Bitmap back = loadBitmap(width, height, 1);
page.setTexture(front, CurlPage.SIDE_FRONT);
page.setTexture(back, CurlPage.SIDE_BACK);
page.setColor(Color.argb(127, 170, 130, 255),
CurlPage.SIDE_FRONT);
page.setColor(Color.rgb(255, 190, 150), CurlPage.SIDE_BACK);
break;
}
// Fifth case is same image is assigned to front and back. In this
// scenario only one texture is used and shared for both sides.
case 4:
Bitmap front = loadBitmap(width, height, 0);
page.setTexture(front, CurlPage.SIDE_BOTH);
page.setColor(Color.argb(127, 255, 255, 255),
CurlPage.SIDE_BACK);
break;*/
}
}
}
/**
* CurlView size changed observer.
*/
class SizeChangedObserver implements CurlView.SizeChangedObserver {
#Override
public void onSizeChanged(int w, int h) {
if (w > h) {
mCurlView.setViewMode(CurlView.SHOW_TWO_PAGES);
mCurlView.setMargins(.1f, .05f, .1f, .05f);
} else {
mCurlView.setViewMode(CurlView.SHOW_ONE_PAGE);
//mCurlView.setMargins(.1f, .1f, .1f, .1f);
}
}
}
public Bitmap GetBitmapfromUrl(String scr) {
try {
URL url=new URL(scr);
HttpURLConnection connection=(HttpURLConnection)url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input=connection.getInputStream();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 2;
Bitmap bitmap = BitmapFactory.decodeStream(input, null, options);
// Bitmap bmp = BitmapFactory.decodeStream(input);
return bitmap;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
}
public void getAllMagazineById() {
new AsyncTask<Void, Void, String>() {
ProgressDialog mProgressDialog;
protected void onPostExecute(String result) {
mProgressDialog.dismiss();
magazineidlist = new ArrayList<String>();
imageurllist = new ArrayList<String>();
//imageloder = new ImageLoader(CurlActivity.this);
// LayoutInflater factory = LayoutInflater.from(CurlActivity.this);
// View child = factory.inflate(R.layout.sample, null);
// imageView = (ImageView)child.findViewById(R.id.imageviewsample);
//imageView = (ImageView)findViewById(R.id.imageviewsample);
try {
JSONObject jsob = new JSONObject(result.toString());
if (jsob.getString("msg").equalsIgnoreCase("Success")) {
JSONArray datajson = jsob.getJSONArray("data");
for (int i = 0; i < datajson.length(); i++) {
JSONObject c = datajson.getJSONObject(i);
middata = c.getString("magazine_id");
imgurl = c.getString("image_url");
magazineidlist.add(middata);
imageurllist.add(imgurl);
Log.d("imageurllist value at index" +i, imageurllist.get(i));
//imageloder.DisplayImage(imageurllist.get(i),imageView);
String url = imageurllist.get(i);
Log.d("url val", url);
}
mCurlView.setPageProvider(new PageProvider());
mCurlView.setSizeChangedObserver(new SizeChangedObserver());
//mCurlView.setCurrentIndex(0);
mCurlView.setBackgroundColor(0xFF202830);
} else if(jsob.getString("msg").equalsIgnoreCase("Failure")) {
System.out.println("not a valid data");
}
else
{
System.out.println("error");
}
} catch (Exception e) {
Log.e("error", "" + e);
}
}
private void startActivity(Intent i) {
// TODO Auto-generated method stub
}
#Override
protected String doInBackground(Void... arg0) {
// Creating service handler class instance
try {
HttpPost httppost1 = null;
HttpClient httpclient1 = new DefaultHttpClient();
httppost1 = new HttpPost(JsonKey.MAIN_URL);
// Add your data
List<NameValuePair> nameValuePairs1 = new ArrayList<NameValuePair>(
2);
nameValuePairs1.add(new BasicNameValuePair("action",
"GetMagazinePageImagesbyid"));
nameValuePairs1.add(new BasicNameValuePair("iMagezineId",
cid));
httppost1.setEntity(new UrlEncodedFormEntity(
nameValuePairs1));
// Execute HTTP Post Request
HttpResponse response1 = httpclient1.execute(httppost1);
BufferedReader in1 = new BufferedReader(
new InputStreamReader(response1.getEntity()
.getContent()));
StringBuffer sb1 = new StringBuffer("");
String line1 = "";
while ((line1 = in1.readLine()) != null) {
sb1.append(line1);
}
in1.close();
Log.e(" Get All magazine original data", sb1.toString());
return sb1.toString();
} catch (Exception e) {
Log.e("Get All magazine response problem", "" + e);
return " ";
}
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
mProgressDialog = new ProgressDialog(CurlActivity.this);
mProgressDialog.setTitle("");
mProgressDialog.setCanceledOnTouchOutside(false);
mProgressDialog.setMessage("Please Wait...");
mProgressDialog.show();
}
}.execute();
}
public static Bitmap getBitmapFromURL(String src) {
try {
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (IOException e) {
// Log exception
return null;
}
}
Bitmap drawable_from_url(String url) throws java.net.MalformedURLException, java.io.IOException {
Bitmap x;
HttpURLConnection connection = (HttpURLConnection)new URL(url) .openConnection();
connection.setRequestProperty("User-agent","Mozilla/4.0");
connection.connect();
InputStream input = connection.getInputStream();
x = BitmapFactory.decodeStream(input);
return x;
}
public class GridImageAdapter extends BaseAdapter {
public Context mContext;
// public final String[] web;
// final int ImageId[];
public CurlActivity activity;
public ImageLoader imageloader;
// Constructor
public GridImageAdapter(CurlActivity c, ArrayList<String> imageUrl) {
// TODO Auto-generated constructor stub
mContext = c;
imageurllist = imageUrl;
imageloader = new ImageLoader(CurlActivity.this);
}
public int getCount() {
return imageurllist.size();
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
View grid;
LayoutInflater inflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
grid = new View(mContext);
grid = inflater.inflate(R.layout.sample, null);
ImageView img = (ImageView) grid.findViewById(R.id.imageviewsample);
imageloader.DisplayImage(imageurllist.get(position), img);
}
/*
* ImageView imageView; if (convertView == null) { imageView = new
* ImageView(mContext); imageView.setLayoutParams(new
* GridView.LayoutParams(85, 85));
* imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
* imageView.setPadding(8, 8, 8, 8); }
*/else {
grid = (View) convertView;
}
/*
* imageView.setImageResource(mThumbIds[position]); return
* imageView;
*/
return grid;
}
// Keep all Images in array
/*
* public Integer[] mThumbIds = { R.drawable.nightlife,
* R.drawable.coffee, R.drawable.shopping, R.drawable.seeanddo,
*
* };
*/
public Bitmap StringToBitMap(String encodedString) {
try {
byte[] encodeByte = Base64
.decode(encodedString, Base64.DEFAULT);
Bitmap bitmap = BitmapFactory.decodeByteArray(encodeByte, 0,
encodeByte.length);
return bitmap;
} catch (Exception e) {
e.getMessage();
return null;
}
}
}
}