I found a library: CompressorV1.0.zip. (https://www.b4x.com/android/forum/threads/time-to-compress.84759/). I'm trying to compress a photo - jpg (1,5 Мb):
But the photo isn't compressed at all. It stays the same. Why doesn't it work? Is there another way to compress a photo to 200-300 Кb?
#Region Project Attributes #ApplicationLabel: B4A Example #VersionCode: 1 #VersionName: 'SupportedOrientations possible values: unspecified, landscape or portrait. #SupportedOrientations: unspecified #CanInstallToExternalStorage: False #End Region #Region Activity Attributes #FullScreen: False #IncludeTitle: True #End Region Sub Process_Globals 'These global variables will be declared once when the application starts. 'These variables can be accessed from all modules. Dim comp As Compressor End Sub Sub Globals 'These global variables will be redeclared each time the activity is created. 'These variables can only be accessed from this module. End Sub Sub Activity_Create(FirstTime As Boolean) 'Do not forget to load the layout file created with the visual designer. For example: 'Activity.LoadLayout("Layout1") comp.Initialize("Compressor") File.Copy(File.DirAssets,"IMG.jpg",File.DirRootExternal,"donmanfredorg.jpg") 'Dim bmp As Bitmap = comp.compressToBitmap(File.DirRootExternal,"donmanfredorg.png") comp.DestinationDirectoryPath = File.Combine(File.DirRootExternal,"Compressor") comp.compressToFile(File.DirRootExternal,"donmanfredorg.jpg") ' Dim d As BitmapDrawable ' d.Initialize(bmp) ' Activity.Background = d End Sub