Displaying image and sharing to other apps in Android

Question

In my app, i have to download one image from the url. I have to preview that image in my app and i have to share the image using explicit intent. I have faced two issues as follows:

1. I don't want to store the image in external storage. So what are the other options than sharedpreferences? (Since shared preference is very slow to decode and encode image). Is caching is good? If it is good how can i achieve it?

2. Bitmaps cannot be send explicitly to other apps through intents.(I am talking about share image feature in my app). So what are the other possible options for that?

Answer 1

1. Download image and store it in your cache directory

   URL url = new URL("YOUR_URL"); 
   HttpURLConnection connection = (HttpURLConnection) url.openConnection(); 
   connection.setDoInput(true); 
   connection.connect(); 
   InputStream input = connection.getInputStream(); Bitmap myBitmap = BitmapFactory.decodeStream(input); 
   String data1 = String.valueOf(String.format("/sdcard/dirname/%d.jpg",System.currentTimeMillis())); FileOutputStream stream = new FileOutputStream(data1); 
   ByteArrayOutputStream outstream = new ByteArrayOutputStream(); myBitmap.compress(Bitmap.CompressFormat.JPEG, 85, outstream); 
   byte[] byteArray = outstream.toByteArray(); stream.write(byteArray); 
   stream.close();
   

2. You need locally saved file path URL to share across apps.

   Intent intent = new Intent(Intent.ACTION_SEND); intent.setData(Uri.parse(file path)); startActivity(intent);