I'm relatively new to this and I've been using the AndroidHttpClient just fine to help with downloading images to my app via Parse. Now with Sdk 23, I've got to rewrite a few of my classes. My question is fairly simple.
Let's take the following code, which doesn't do anything as an example:
new TwinPrimeSDK(getApplicationContext(), "12345678-1234-1234-1234-123456789012-1234567-123");
try {
URLConnection httpConn = TPURLConnection.openConnection("your-URL");
} catch (IOException e) {
e.printStackTrace();
}
What does the "your-URL" refer to? With AndroidHttpClient over Apache I never had to use a specific URL for anything. It just worked.
Update:
public class ImageLoader {
// Last argument true for LRU ordering
private Map<String, String> objectIdToUriMap = Collections.synchronizedMap(new LinkedHashMap<String, String>(10, 1.5f, true));
MemoryCache memoryCache = new MemoryCache();
FileCache fileCache;
private Map<ImageView, String> imageViews = Collections.synchronizedMap(new WeakHashMap<ImageView, String>());
ExecutorService executorService;
// Handler to display images in UI thread
Handler handler = new Handler();
public ImageLoader(FileCache fileCache) {
//fileCache = new FileCache(context);
this.fileCache = fileCache;
executorService = Executors.newFixedThreadPool(5);
// need to re-evaluate where to do this as it is causing problems with not being able to download feed items as they are cleared from cache
//clearCache();
// only clear file cache, we're not using mem cache (every time we instantiate with a filecache)
fileCache.clear();
}
public void DisplayImage(String url, ImageView imageView, ProgressBar progress) {
imageViews.put(imageView, url);
Bitmap bitmap = memoryCache.get(url);
if (bitmap != null) {
imageView.setImageBitmap(bitmap);
}
else {
queuePhoto(url, imageView, progress);
//imageView.setImageResource(stub_id);
imageView.setVisibility(View.GONE);
if(progress != null) {
progress.setVisibility(View.VISIBLE);
}
}
}
private void queuePhoto(String url, ImageView imageView, ProgressBar progress) {
PhotoToLoad p = new PhotoToLoad(url, imageView, progress);
executorService.submit(new PhotosLoader(p));
}
// must be run in a thread
private Bitmap getBitmap(String url) {
File f = fileCache.getFile(url);
Bitmap b = decodeFile(f);
if (b != null) {
return b;
}
// Download Images from the Internet
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);
FeedUtils.CopyStream(is, os);
os.close();
conn.disconnect();
bitmap = decodeFile(f);
return bitmap;
} catch (Throwable ex) {
ex.printStackTrace();
if (ex instanceof OutOfMemoryError)
memoryCache.clear();
return null;
}
}
public Uri getImageURIWithDownload(String url) {
// try getting file from cache 1st
File f = fileCache.getFile(url);
if (f != null) {
if(f.exists()) {
return Uri.fromFile(f);
}
}
// get bitmap from http (or cache, in fact)
getBitmap(url);
// try getting file again
f = fileCache.getFile(url);
return (f != null) ? Uri.fromFile(f) : null;
}
// Decodes image and scales it to reduce memory consumption
// note. wda. doesn't use sample size (no scaling!)
private Bitmap decodeFile(File f) {
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 = 70;
int width_tmp = o.outWidth, height_tmp = o.outHeight;
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) {
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
// Task for the queue
private class PhotoToLoad {
public String url;
public ImageView imageView;
public ProgressBar progress;
public PhotoToLoad(String u, ImageView i, ProgressBar p) {
url = u;
imageView = i;
progress = p;
}
}
class PhotosLoader implements Runnable {
PhotoToLoad photoToLoad;
PhotosLoader(PhotoToLoad photoToLoad) {
this.photoToLoad = photoToLoad;
}
@Override
public void run() {
try {
if (imageViewReused(photoToLoad)) { return; }
Bitmap bmp = getBitmap(photoToLoad.url);
//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);
if (tag == null || !tag.equals(photoToLoad.url)) {
return true;
}
return false;
}
// 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);
photoToLoad.imageView.setVisibility(View.VISIBLE);
if(photoToLoad.progress != null)
photoToLoad.progress.setVisibility(View.GONE);
}
else {}
//photoToLoad.imageView.setImageResource(stub_id);
}
}
public void clearCache() {
memoryCache.clear();
fileCache.clear();
}
}
What does the "your-URL" refer to?
It refers to the url which you want to access information from.
With AndroidHttpClient over Apache I never had to use a specific URL for anything. It just worked.
No you'll provide url in that case too.
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(new HttpGet(URL));
If you want to use a http request, it should have a request url, without which it doesn't know where to get data from.