Examples of bitmap usage of Android learning

The following is a brief description of the use of bitmap:

Download a picture from the server, display it on the ImageView control, and save the picture on your mobile device's SD.

1 //get input stream based on network URL2      PublicInputStream Geturlinputstream (String strurl)throwsIOException {3URL url =NewURL (strurl);4HttpURLConnection conn =(HttpURLConnection) url.openconnection ();5InputStream InputStream =Conn.getinputstream ();6         if(InputStream! =NULL) {7             returnInputStream;8}Else {9LOG.I ("InputStream", "input stream object is empty");Ten             return NULL; One         } A     } -  -     //flow input into bitmap stream the      PublicBitmap Getbitmap (InputStream inputstream) { -Bitmap Bitmap =NULL; -         if(InputStream! =NULL) { -Bitmap =Bitmapfactory.decodestream (inputstream); +             returnbitmap; -}Else { +LOG.I ("Test", "input stream object in is empty"); A             return NULL; at         } -     } -  -     //Assigning a value to a ImageView object -      Public voidsetwidgetimage (Bitmap Bitmap) { -ImageView img =NewImageView ( This); in         if(Bitmap! =NULL) { - Img.setimagebitmap (bitmap); to         } +     } -  the     //get the file storage path on the SD card *      Public voidCreatesdfile () { $File Sdroot =environment.getexternalstoragedirectory ();Panax NotoginsengFile File =NewFile (Sdroot + "/android/date/package name/file name"); -         if(Environment.MEDIA_MOUNTED.equals (Environment the . Getexternalstoragestate ())) { +             //Related Actions A         } the     } +  -     //Save the picture to an SD card $      Public Booleanreadtosdcard (file file, Bitmap Bitmap) $             throwsFileNotFoundException { -FileOutputStream OS =Newfileoutputstream (file); -         returnBitmap.compress (Bitmap.CompressFormat.PNG, 90, OS); the         //true: Indicates operation succeeded, false: operation failed -}

Examples of bitmap usage of Android learning