Here are some of the suggestions from the community (with my commentary), followed by a few of my suggestions.
Robert Love suggested Slides.com – it is a paid web based presentation service centered around web standards. It includes built in features for making your code snippets look nice. Pro: Includes the code as text. Con: One more monthly fee (there is a free plan).
Glenn Dufke suggested pasting the code with Syntax Highlighting preserved – By default the RAD Studio/Delphi IDE doesn’t maintain this, but the GExperts IDE Plugin has a Source Code Export expert (I used to use this). I’m sure there are others (CnPack maybe?)
David Schwartz suggested just doing a screenshot from the IDE – this preserves your artistic view of how you have your IDE configured. Downside is the code can’t be easily extracted from the slides . . .
Bruce McGee suggested reveal.js – I’ve not used it yet, but it is a full web standard presentation framework, and looks promising. It uses highlight.js for the syntax highlighting, which I have used. With support for 185 languages, it has you covered. I’ll certainly be checking that one out. Thanks Bruce!
Now for my suggestions. In the past I’ve used the rich export options like Glenn suggested, colorized the text by hand, or used an intermediary like Notepad++, etc. But here are some options specifically around creating code screenshots.
Greenshot – is my current preferred desktop screenshot tool for pulling images directly from the IDE. It includes a nice editor for your screenshots too, so you can quickly annotate them, blur things out, etc.
Carbon.now.sh is a web page that takes your code and converts it into a nice image with a macOS style window. There are a few customization options. If you embed it or share it via URL then it provides both the source code and the preview. It doesn’t list Delphi as a language, but the Pascal support is close enough.
Codeimg.io is similar to Carbon, but has more configuration options. The best part is that you can use templates sized exactly for different social media platforms. A lot more customization options, including both Windows and macOS window styles. It doesn’t appear to offer a share by URL or embed option, and only does the image generation. For some reason it defaults to a JPG instead of a PNG for the image though (also supports SVG). Newer addition and still in beta.
src2img is a no-nonsense straightforward converter that turns out Source into a PNG file. Just select language (auto detects Delphi) and style. It is based on highlight.js and the source is on GitHub. Doesn’t offer a link share, just image download.
Instacode is the Instagram of the bunch, with image filters like tilt shift and 3D rotation. Directly supports Delphi language, and you can share via a URL that allows someone to access the code and remix the image. Even has wallpaper generator.
Lastly, if you have some Photoshop skills (or can follow tutorials like I do) then you can make your own. This is a combination of screenshots, with perspective warps, a few filters, background images, etc.
Did I mention CodeRage 2019 is coming soon?
How do you pretty print your source code? Which of the above is your favorite, or what did I miss?
I was a guest on X-Keys 5 Minute Friday showing off an integration between OBS Studio with the X-Keys XK-24 USB Keypad. I created a script that assigns F13 through F24 with and without the CTRL modifiers to the XK-24. You can simply assign these in the OBS hotkey settings and it will respond to those globally.
Here is the MW3(VB) script you can load into MacroWorks obs-xk-24.mw3
For some reason the F24 and CTRL+F24 didn’t work. I’m not sure if that is an OBS issue or where the cause originates. This would allow you to use your XK-24 with any software that that allows you to assign F13-F24 and recognizes global hotkeys.
10.3 Rio’s installer (I use and recommend the EXE/web over the ISO, since it is faster and more flexible) does a fantastic job of installing and setting everything up for Android development, without requiring any manual steps. Still, sometimes it is nice to be able to manually install everything, which brings me to this guide.
I’m a big believer in understanding the way the underlying systems work, and installing this way is more work, but you are able to see how everything works together. Also, this allows you to share SDKs between multiple installations, and also place the tools like ADB on your path for easy use. Not to say you can’t do all of that with the automatic install, but sometimes it is nice to get your hands dirty.
I also occasionally run into people who are having trouble getting things installed for various reasons. So this is a great way to troubleshoot installation issues.
This assumes you already have RAD Studio, Delphi, or C++Builder 10.3 Rio already installed. 10.3 Rio changed the versions of the SDK and NDK that it uses, so this guide won’t work with other versions. Also, I switched to AdoptOpenJDK instead of the traditional Oracle JDK. I’ll show you how to install that here, but if you use a different JDK that will be different for you.
OpenJDK is a free and open-source implementation of the Java Platform, Standard Edition. It is the result of an effort Sun Microsystems began in 2006. The implementation is licensed under the GNU General Public License version 2 with a linking exception. It is the official reference implementation of Java SE since version 7.
There are multiple builds available, with different terms and support options. Why not just use the Java SE JDK? Oracle has changed the license on it that may require you to purchase a license to use it. For my purposes it is better save than sorry, plus the OpenJDK is a lot smaller and less annoying. I picked AdoptOpenJDK, which seems to be the most popular option, but this should mostly work the same with any build.
AdoptOpenJDK includes the JRE (Java Runtime Environment) too, so just one install. You must install it first because you can’t run the Android SDK manager without Java installed, and the IDE users the JDK for KeyTool and JarSigner.
AdoptOpenJDK Install Instructions
Download the Windows installer for OpenJDK 8 (LTS). I used the 64-bit Windows version with the HotSpot JVM, and then just run the installation. Be sure to tell it to set the JAVA_HOME environment variable.
When you visit the site to download the Android SDK they try to get you to download the full Android Studio, but you don’t need all of that. If you scroll to the bottom, you will see the “Command line tools only” downloads. One note, the downloads listed on the site no longer include the GUI SDK Manager. If you scroll down further, I’ll show you how you can download that and use it instead.
This isn’t an installer, so just pick a folder to unzip it into. You will just find a “tools” folder in the zip. This contains the SDK Manager to install the rest of the Android SDK. I typically unzip it into the folder:
Then use the sdkmanager command-line tool (in the tools\bin folder) to install everything you need. Notice I am installing the Android 26 Platform. This is the version you want to use with 10.3 Rio. It meets the new Target SDK requirements and still gives your Android apps maximum compatibility. This is the version 10.3 Rio is designed to work with.
The fact we are installing an older version of the SDK isn’t a big deal because we will still update it when we are done, but now we have a choice of using the command-line interface like I showed in the previous section, or using the GUI SDK Manager by running the Android.bat file in the tools folder.
Once you run the SDK manager, you want to install the latest Android SDK Tools, Android SDK Platform-tools, Android SDK Build-tools, Android API 26 SDK Platform, and the Google USB Driver. It will default to installing a lot of other things you don’t need. Feel free to deselect those. The Google USB Driver isn’t technically needed, but is nice to have.
Once you’ve selected what you want installed, you can always update them via the command line with the sdkmanager utility in the tools\bin folder
Installing the Android NDK
10.3 Rio updated the version of the Android NDK it uses to release 17b. It was the latest at the time of Rio’s development. There have been some new NDK releases since then. If you visit the Older Releases page for the Android NDK you will see 17b isn’t listed there, but the download file is still available. 17c may work, but I haven’t tested it extensively yet.
There are no further installation steps necessary. Your folders should look something like this when you are done:
I’ve expanded the directories so you can see the build tools and Android platforms also installed
Environment Variables and System Path
Last thing you need to do is set up some Environment Variables and add things to your system path. This isn’t strictly necessary, but I highly recommend it!
Then add the following to your system path
%JAVA_HOME%\bin (you can replace the expanded version with this)
Settings Up the IDE SDK Manager
Since we’ve installed the SDK manually, we need to tell the IDE where to find it. This is really simple. Go into Tools ? Options ? Deployment ? SDK Manager (or just use the IDE search for SDK Manager) and add a new SDK entry.
The next stage in the wizard looks to make sure it can find everything it needs. If you didn’t install everything with the Android SDK Manager, then you may see a warning symbol next to something. If that is the case go back and double check the installation.
And with that you are ready to develop and deploy Android apps with FireMonkey.
I covered this previously in a few webinars and presentations, but never published the source code for WebBroker on Android. To be honest I hadn’t tested it with C++Builder before, but I completely expected it to work, and it did. I also updated the tests on Emteria.OS (FKA RTAndroid) and it also works there.
The process of porting a Delphi or C++Builder WebBroker project to Android is pretty straight forward, but I’m publishing the code anyway. You create a Windows FMX WebBroker project, then copy all the code into a regular FireMonkey project. You will need to copy a few files from the RTL folder locally so you can reference them since they aren’t included in the Android package.
For C++Builder you also need
Here are the links for the Delphi and C++Builder projects. They were built and tested in with 10.3.1 Rio. I also compiled some updated details on how to build the project and how to install and test on Emteria.OS.
I mention this in the slide deck, but officially WebBroker isn’t supported on Android. I tested it, and it seems to work, but if you run into an instance where it doesn’t work as expected, then you are on your own. Please don’t contact support and tell them I said it should work. Thanks!
I wanted to finish this side project during Women’s History Month to honor the Amazing Grace Hopper and her contributions to the field of Computer Science. I found this interesting SVG of Grace Hopper that wanted to figure out how to render in Delphi using the FireMonkey TPath, but it also looked like it should be animated somehow . . . .
I’ve rendered some simple SVG graphics with the TPath component before, but this one was more complicated. It has multiple colors and variable opacity. This requires multiple TPath instances to handle each variation. It was a simple matter of loading in the SVG file using an IXMLDocument, then parsing the elements, and creating a TPath for each one. For fun I included a variable sleep between each draw. Also, to make sure all the paths have the same relative size I added a couple MoveTo calls to define the client area.
tabControl.ActiveTab := TabItem2;
// This removes the encoded carriage returns
XmlSvg := LoadXMLData(StringReplace(memo1.Text, '
', '', [rfReplaceAll]));
if XmlSvg.DocumentElement.HasAttribute('viewBox') then
val := XmlSvg.DocumentElement.Attributes['viewBox'];
vals := val.Split([' ']);
SVGLayout.Width := vals.ToInteger - vals.ToInteger;
SVGLayout.Height := vals.ToInteger - vals.ToInteger;
for var idx := 0 to XmlSvg.DocumentElement.ChildNodes.Count - 1 do
node := XmlSvg.DocumentElement.ChildNodes[idx];
if (node.NodeName = 'path') and (node.HasAttribute('d')) then
path := TPath.Create(svgLayout);
path.Parent := svgLayout;
path.WrapMode := TPathWrapMode.Stretch;
path.Align := TAlignLayout.Contents;
path.Data.Data := node.Attributes['d'];
if node.HasAttribute('opacity') then
path.Opacity := StrToFloat(node.Attributes['opacity']);
if node.HasAttribute('fill') and (node.Attributes['fill'] <> 'none') and (node.Attributes['fill'] <> '') then
path.Fill.Color := TAlphaColorRec.Alpha or StringToAlphaColor(node.Attributes['fill']);
This is by no means a complete implementation of the SVG standard, but it is getting closer! Close enough for some simple SVG images though, and possibly a useful basis for more complicated ones.
The animations was just a matter of assigning a TFloatAnimation to each TPath that adds some random movement. I included both slight scales and rotations. I could have done both on each, but was afraid that might be too much movement.
for I := 0 to pred(SVGLayout.ChildrenCount) do
if SVGLayout.Children[I] is TPath then
path := SVGLayout.Children[I] as TPath;
dance := TFloatAnimation.Create(nil);
dance.Parent := Path;
dance.AutoReverse := True;
dance.Loop := True;
dance.StartFromCurrent := True;
case random(4) of
case random(2) of
0: dance.PropertyName := 'Scale.X';
1: dance.PropertyName := 'Scale.Y';
case random(2) of
0: dance.StopValue := 1.01;
1: dance.StopValue := 0.99;
case random(2) of
dance.PropertyName := 'Position.X';
case random(2) of
0: dance.StopValue := Path.Position.X - random - 0.01;
1: dance.StopValue := Path.Position.X + random + 0.01;
dance.PropertyName := 'Position.Y';
case random(2) of
0: dance.StopValue := Path.Position.Y - random - 0.01;
1: dance.StopValue := Path.Position.Y + random + 0.01;
dance.PropertyName := 'RotationAngle';
path.RotationCenter.X := random;
path.RotationCenter.Y := random;
case random(2) of
0: dance.StopValue := random + 0.01;
1: dance.StopValue := -1 * random - 0.01;
dance.Enabled := True;
And we end up with something like this . . .. (Down scaled and lower FPS)
I’m posting my code if you want to play with it some more. The source SVG is embedded in a memo instead of reading it from a file. It was written with Delphi 10.3.1 Rio.
A lot going on today for Delphi. Celebrating 24 years as being our favorite development tool, and also got the 10.3.1 Rio release! I wanted to do something fun for today, but I keep getting all wrapped up with webinars and other things, so this is a bit last minute, but still fun I think . .. .
I’ve been playing with SVG and the TPath shape component. If you are not familiar with SVG it stands for Scalable Vector Graphic and is a vector graphic format based on XML. I’ve always liked SVG, and am glad that it is finally catching on (in Oct 2018 they recommended a candidate for SVG2!) TPath on the other hand is a FireMonkey shape component that complex draws 2D shapes. Turns out the Path Data used by TPath is compatible with SVG path data.
There are a few full blown SVG components [RiverSoftAVG, BVerhue, M. Walter’s, Ekot1, and probably more…] for Delphi, but for fun I’ve been experimenting with building my own: having Delphi read the SVG XML file, and then render it with shapes, layouts, paths, etc. Not sure if it will ever get to a usable state, but I thought I would share a little TPath fun with you.
Create a new FireMonkey application and copy and paste this component onto your form.
Or if you would rather just paste the path data into a new TPath component of your own you can do that too (just make sure it is square for the right aspect ratio and set the Fill color):
M 499.996 185.685 C 500.673 282.217 411.317 315.926 353.636 356.897 C 300.877 394.36 255.711 447.001 250.27 468.359 C 243.913 446.564 203.354 395.367 146.37 357.94 C 87.596 319.354 -0.667 283.269 0.004 186.738 C 1.214 10.975 185.692 -37.617 250.41 113.819 C 312.154 -31.581 498.776 9.49 499.996 185.685 Z M 211.574 374.131 C 224.398 374.131 239.97 375.963 257.374 379.627 L 266.533 363.139 L 256.458 341.155 C 245.466 339.323 235.39 338.407 227.146 338.407 C 204.247 338.407 200.583 345.735 200.583 345.735 L 186.843 377.795 C 191.423 375.963 199.667 374.131 211.574 374.131 Z M 206.994 345.735 C 218.902 342.071 231.014 341.448 237.222 343.903 C 229.894 341.155 210.658 347.567 210.658 347.567 L 196.919 366.803 Z M 175.495 317.519 L 140.152 325.868 C 142.016 330.859 143.5 334.57 144.604 337
C 145.709 339.43 147.471 342.862 149.892 347.297 L 182.731 329.764 Z M 169.712 299.497 L 132.081 291.637 C 132.591 296.206 133.055 299.638 133.472 301.934 C 133.89 304.23 134.725 307.941 135.977 313.066 L 173.547 312.76 C 172.578 310.076 171.836 308.045 171.321 306.665 C 170.806 305.286 170.27 302.897 169.712 299.497 Z M 167.703 271.54 L 132.916 249.893 C 132.014 256.899 131.457 262.094 131.246 265.477 C 131.035 268.86 131.035 273.684 131.246 279.949 L 168.26 292.75 C 167.792 288.175 167.514 284.743 167.425 282.453 C 167.336 280.164 167.428 276.526 167.703 271.54 Z M 173.547 247.666 L 145.161 209.539 C 142.577 215.412 140.722 219.957 139.595 223.176
C 138.468 226.394 137.077 231.126 135.421 237.369 L 168.538 266.59 C 169.442 261.919 170.184 258.486 170.764 256.293 C 171.345 254.1 172.273 251.225 173.547 247.666 Z M 190.245 221.506 L 177.444 164.455 C 170.974 171.095 166.243 176.29 163.25 180.04 C 160.257 183.789 156.547 189.17 152.118 196.181 L 175.495 243.213 C 178.402 237.882 180.628 234.079 182.175 231.803 C 183.721 229.528 186.411 226.095 190.245 221.506 Z M 222.249 199.521 L 234.495 128.833 C 222.951 133.828 214.324 137.909 208.613 141.078 C 202.902 144.247 196.316 148.607 188.854 154.158 L 194.141 217.332 C 200.474 212.197 205.298 208.579 208.613 206.478 C 211.928 204.377 216.474 202.058 222.249 199.521 Z M 261.211 193.398 L 299.616 122.154 C 288.313 121.306 279.5 121.12 273.178 121.597 C 266.856 122.074 258.414 123.28 247.853 125.215 L 228.65 196.738 C 236.473 194.908 242.317 193.795 246.183 193.398 C 250.049 193.002 255.058 193.002 261.211 193.398 Z M 299.509 205.589 L 368.913 147.201 C 360.935 141.82 352.771 137.367 344.422 133.842
C 336.073 130.317 327.446 127.441 318.541 125.215 L 270.384 194.923 C 274.525 195.545 279.81 197.003 286.24 199.297 Z M 312.333 375.963 C 311.417 372.299 304.089 340.239 275.693 320.088 C 274.777 319.172 261.038 308.18 254.626 299.936 L 244.55 301.768 L 288.517 397.03 C 294.013 395.198 311.417 386.954 312.333 375.963 Z M 335.232 274.288 L 326.072 217.497 L 229.894 284.364 L 232.642 294.44 Z M 239.138 298.104 L 229.978 299.936 L 226.314 282.532 L 316.081 221.161 C 299.593 205.59 277.609 195.513 256.542 195.513 C 209.826 195.513 171.355 233.985 171.355 280.7 C 171.355 304.516 181.431 327.415 198.835 342.987 C 200.667 340.239 206.163 333.827 229.062 333.827 C 237.306 333.827 246.466 334.743 257.458 336.575 Z M 196.003 326.499 C 150.203 247.725 227.146 210.169 237.222 206.505 C 228.062 210.169 155.699 254.137 202.415 323.751 C 199.667 325.583 196.003 327.415 196.003 326.499 Z
If you are curious what the whole SVG file looks like, here it is:
<?xml version="1.0" encoding="utf-8"?>
<svg viewBox="0 0 500 500" xmlns="http://www.w3.org/2000/svg">
<path id="Delphi" d="M 499.996 185.685 C 500.673 282.217 411.317 315.926 353.636 356.897 C 300.877 394.36 255.711 447.001 250.27 468.359 C 243.913 446.564 203.354 395.367 146.37 357.94 C 87.596 319.354 -0.667 283.269 0.004 186.738 C 1.214 10.975 185.692 -37.617 250.41 113.819 C 312.154 -31.581 498.776 9.49 499.996 185.685 Z M 211.574 374.131 C 224.398 374.131 239.97 375.963 257.374 379.627 L 266.533 363.139 L 256.458 341.155 C 245.466 339.323 235.39 338.407 227.146 338.407 C 204.247 338.407 200.583 345.735 200.583 345.735 L 186.843 377.795 C 191.423 375.963 199.667 374.131 211.574 374.131 Z M 206.994 345.735 C 218.902 342.071 231.014 341.448 237.222 343.903 C 229.894 341.155 210.658 347.567 210.658 347.567 L 196.919 366.803
Z M 175.495 317.519 L 140.152 325.868 C 142.016 330.859 143.5 334.57 144.604 337 C 145.709 339.43 147.471 342.862 149.892 347.297 L 182.731 329.764 Z M 169.712 299.497 L 132.081 291.637 C 132.591 296.206 133.055 299.638 133.472 301.934 C 133.89 304.23 134.725 307.941 135.977 313.066 L 173.547 312.76 C 172.578 310.076 171.836 308.045 171.321 306.665 C 170.806 305.286 170.27 302.897 169.712 299.497 Z M 167.703 271.54 L 132.916 249.893 C 132.014 256.899 131.457 262.094 131.246 265.477 C 131.035 268.86 131.035 273.684 131.246 279.949 L 168.26 292.75 C 167.792 288.175 167.514 284.743 167.425 282.453 C 167.336 280.164 167.428 276.526 167.703 271.54 Z M 173.547 247.666 L 145.161 209.539 C 142.577 215.412 140.722 219.957 139.595 223.176 C 138.468 226.394 137.077 231.126 135.421 237.369 L 168.538 266.59
C 169.442 261.919 170.184 258.486 170.764 256.293 C 171.345 254.1 172.273 251.225 173.547 247.666 Z M 190.245 221.506 L 177.444 164.455 C 170.974 171.095 166.243 176.29 163.25 180.04 C 160.257 183.789 156.547 189.17 152.118 196.181 L 175.495 243.213 C 178.402 237.882 180.628 234.079 182.175 231.803 C 183.721 229.528 186.411 226.095 190.245 221.506 Z M 222.249 199.521 L 234.495 128.833 C 222.951 133.828 214.324 137.909 208.613 141.078 C 202.902 144.247 196.316 148.607 188.854 154.158 L 194.141 217.332 C 200.474 212.197 205.298 208.579 208.613 206.478 C 211.928 204.377 216.474 202.058 222.249 199.521 Z M 261.211 193.398 L 299.616 122.154 C 288.313 121.306 279.5 121.12 273.178 121.597 C 266.856 122.074 258.414 123.28 247.853 125.215 L 228.65 196.738 C 236.473 194.908 242.317 193.795 246.183 193.398 C 250.049 193.002 255.058 193.002 261.211 193.398 Z M 299.509 205.589 L 368.913 147.201 C 360.935 141.82 352.771 137.367 344.422 133.842
C 336.073 130.317 327.446 127.441 318.541 125.215 L 270.384 194.923 C 274.525 195.545 279.81 197.003 286.24 199.297 Z M 312.333 375.963 C 311.417 372.299 304.089 340.239 275.693 320.088 C 274.777 319.172 261.038 308.18 254.626 299.936 L 244.55 301.768 L 288.517 397.03 C 294.013 395.198 311.417 386.954 312.333 375.963 Z M 335.232 274.288 L 326.072 217.497 L 229.894 284.364 L 232.642 294.44 Z M 239.138 298.104 L 229.978 299.936 L 226.314 282.532 L 316.081 221.161 C 299.593 205.59 277.609 195.513 256.542 195.513 C 209.826 195.513 171.355 233.985 171.355 280.7 C 171.355 304.516 181.431 327.415 198.835 342.987 C 200.667 340.239 206.163 333.827 229.062 333.827 C 237.306 333.827 246.466 334.743 257.458 336.575 Z M 196.003 326.499 C 150.203 247.725 227.146 210.169 237.222 206.505 C 228.062 210.169 155.699 254.137 202.415 323.751 C 199.667 325.583 196.003 327.415 196.003 326.499 Z" fill="#d40000"/>
And for those of you who are impatient, here is the output:
And since it is a vector graphic it will look great at any resolution, as long as you maintain a 1:1 aspect ratio.
What fun Delphi side projects are you working on? What did you do to celebrate the birthday of your favorite programming language?
Today, I have a webinar on Getting the Most out of Android with 10.3 Rio. I want it to be a bit of a State of Android development today, as well as a What’s New in 10.3 Rio for Android. During CodeRage 2018 presented on what’s new in 10.3 Rio around Android. That session evolved into this webinar.
Here is the Q&A log. I’ve gone back and typed answers to all the questions and included links too when possible. I may have edited some questions for length or clarity. The recording of the Q&A failed, and despite trying to recover it I wasn’t able to.
Question: what about Samsung Tizen os mobile? I think it’s different than Android OS
When I worked for a large PC manufacturer, it was common for companies to tell Intel they were looking at AMD CPUs as a bargaining technique
Samsung mostly uses Tizen as a way to tell Google that they have options aren’t too attached to Android
Abandoning Android compatibility and ecosystem is dangerous
Question: and what about Android Intel processors or Android emulator with Intel Atom (x86)
Intel’s Atom processors made a short appearance in Android devices
They were x86 instead of ARM base
Android 4.4 KitKat included libHoudini to provide ARM compatibility
ARM compatibility was required because of widespread native NDK apps
Most games include native NDK parts
Discontinued for Android in 2016
Question: 8.1 Oreo not yet available for S8+
Answer: That is unfortunate, I thought it was. I recently read that Android 9.0 Pie is coming.
Question: In case I need an external Android library (jar file) included in my project, what should I do?
Answer: Check out the DocWiki for information. But you can add the JAR file in the Project Manager under Targets -> Android -> Libraries and then use Java2OP to create a JNI Bridge file. There is good information in the DocWiki.
Question: Will there be the same webinar for iOS?
Answer: Maybe. I’m not as familiar with iOS, but I’ll see what I can do.
Question: Just a Note that Huawei also has a Dex equivalent and it seems to work better than Samsung’s. Please don’t ignore that
Answer: Very cool! It looks like it called EMUI Desktop on their HUAWEI Mate 10
Question: I am trying to use Drag and Drop to re-sequence TListView items and cannot find any relevant examples. (only things moving panels etc). how would I go about this?
Answer: I’ve not tried, but I’ve seen it done. I would treat the ListView items as individual items like panels and then drag those. On drop just look at where it as in the list and change the index.
Question: LivePreview are available somehow for Delphi CE?
Answer: Yes, just build it and install it. You can find the source here
Question: Are there examples of how to make accepting permissions and explain why needed?
Answer: In the DocWiki and I covered it in the webinar.
Question: Receiving “Can’t open socket: Permission denied. Exiting” message when trying to debug an Android app. Running Android 8.0. This has been a problem since 10.2.
Answer: I just tested this with Rio and a Note 9 running Oreo 8.1 and it worked fine. There was a bug in Android 8.0 that impacted all debuggers. You can find more information on Marco’s blog post.
Question: Why does Delphi take so long, literally 5+ minutes, to recognize an Android device connected, via USB, to my laptop? Windows recognizes the device immediately and I’m able to browse the device within Windows file explorer. Clicking the refresh devices button has no effect. Is there a way to speed up this device recognition process?
Answer: Odd. I’ve not seen that. If you run ADB DEVICES from the command line does it recognize it? If not then that would be an issue with the Android Debug Bridge (ADB) so could be related to your device or the ADB USB driver. The single physical device has multiple devices that Windows recognizes. One is the MTP device for transferring files, the other is the ADB device for debugging. So just because windows recognizes the MTP device doesn’t mean it has recognized the ADB device yet. What device is it?
Question: Re: Delay recognizing device: Device is a Samsung Galaxy S8+. Also tried an HTC One M7 with the same result.
Answer: Did you try ADB DEVICES from the command line? It could be a Windows issue.
Question: Re: Open Socket error: Android version 8.0. Device Samsung Galaxy S8+. Running Delphi Rio 10.3 So there’s no workaround? Given the current route that Android updates arrive at devices: Google -> Manufacturer -> Telcom -> Device means that I’m stuck with no debugging for potentially years … already been ~6 months? Debugging is the reason I’ve invested in Delphi.
Answer: That was a bug in 8.0 Oreo that was fixed in Android 8.1 – it wasn’t specific to Delphi. Unfortunately, we don’t have any control over the Android OS or what Samsung installs on their devices. Wish we did.
Question: What’s the best way to end an Android app?
Answer: Best practice on Android is that you don’t close your app, but let the OS manage that. If you need to though, then just call Close on your main form like you would on another platform. You could also try Application.Terminate and Halt.
Question: Just want to say that this has been an excellent seminar. Thank you for putting it on.
Answer: My pleasure. Glad it is of value.
Question: what are the sound capabilities in RAD Studio for Android?
Answer: You can do quite a bit. Anything that Android supports (which is a lot). There is a media player component that comes with FireMonkey. Take a look at the 4 sample games in GetIt. They have music and sound effects if I recall correctly. The great thing about using FireMonkey is you can get the productivity of all the FireMonkey components, libraries, etc. and then when you need to you can reach down and access the Android APIs just like developers who don’t use FireMonkey.
Question: Wouldn’t it nice to have a component for permissions?
Answer: The PermisionService makes it really easy, but a component could be useful too I suppose.
Question: Where are we with 64 bit for Android?
Answer: R&D is working on it and it is on the Roadmap for later 2019.
Question: Give them the coming end of GCM, any plans for built-in FCM components?
Answer: Good question. I’ll need to look into that. I know there are some free 3rd party libraries that do that.
Question: Hello. where find more info about splash screen? It not clear how to control it.
Question: is possible to active and android Delphi generated app on both and remain on background sending GPS updates? any sample?
Answer: No samples, but I believe people have done it. You would need to be concerned about the battery though. You might need to go directly to the Android GPS API. I would suggest researching Android services on the Android developer site. There are a lot of rules about them.
Question: Hello, I’m wondering why for demos all presenters use a mac? Is better have Delphi on a Mac laptop?
Answer: I prefer Windows, and most developers I know do too, but Apple requires you to have a Mac if you want to build for iOS, and since I need to demo for iOS too then it makes sense to have just one computer.
Question: Ok. It will be great a webinar about to setup Delphi on Mac !!!
Question: Google just announced a few days ago “Starting August 1, 2019: All new apps and app updates that include native code are required to provide 64-bit versions in addition to 32-bit versions when publishing to Google Play.” Looks like our apps will be orphaned later this year without a 64-bit compiler – what is the ETA for a 64-bit android compiler?
Answer: The Roadmap has 10.4.x with 64-bit Android planned for “mid-2019”
Question: When will we see more common UI features as components (ie. not having to do things manually), such as slide menus, for example.
Answer: Like the TMultiView? It is a great common UI component that was introduced in XE7
Question: Can the location sensor be used in an Android service now?
Answer: I personally haven’t tested it . . . You may need to research the Android platform limitations on using location services in the background because of battery consumption issues.
Question: how can we handle the android permission requests?
Answer: It is covered in the DocWiki and here is a sample in the location samples folder
Question: Did I understand correctly that there is a C++ Builder community edition accessible and free for any non-commercial use? (i.e., creating apps for personal use and for open-source distributed apps?)
Question: Doesn’t RAD Studio (or C++ Builder) have its own emulator to “test” apps on *all* platforms in a more-or-less automatic way? (assuming that the emulation is faithful enough)
Answer: We used to offer a bundle deal with MacInCloud but it didn’t get enough use to justify continue it since most people use devices. You can use the Android emulator but it isn’t great, and there are services that let you test on devices in the cloud. Samsung offers one too specifically for their devices. I’ve also heard some people have good luck with using Bluestacks, but I haven’t tried it. There are a lot of options.
Question: Speaking of how iOS is so different and has such different nuances compared to Android…
Answer: There is a lot you can do with a complete multi-platform approach, but then there are specifics to each platform you can take advantage of. For example, your desktop has a larger screen, and more input and output options. A pure multi-device approach does a lot and makes you really productive, but then the great thing about Delphi, C++Builder, & FireMonkey is you can also take advantage of platform-specific features and APIs. Kind of a best of both worlds approach!
Question: but there is a lot of devices that still running 8.0! Even Samsung …
Answer: Yes, it is an unfortunate bug in Android 8.0. Samsung says they have an update coming, and I hear the beta is already available. Have you tried that?
Question: What about 64-bit on Android, iOS, and macOS?
Answer: iOS 64-bit has been available for a while, bot macOS (10.3.x) and Android 64-bit (10.4.x) are on the roadmap for release this year.
Question: what is the best way for FireMonkey mobile app to work with DB (on a server). REST or FireDAC? Or something else?
The best way depends on your goals and the scenario.
I would recommend starting with RAD Server (EMS) using FireDAC to connect to the server database and then connect to RAD Server from your mobile app.
You could also use DataSnap in the same situation (RAD Server is more of a turnkey, while DataSnap lets you build it from scratch so more flexible).
You could also use DevArt’s UniDAC to connect directly to some databases from the mobile app
Question: Hello, what is the best way to show forms and destroy it for android application?
Answer: You can show and destroy forms just like you would on other platforms, or you might consider using frames on a Tab Control. Also, take a look at TFrameStand which is available in the GetIt package manager
Question: Is C++Builder Community Edition available for macOS?
Answer: Yes, it can target macOS. The same features as C++Builder Professional
Question: Is the size of the executable file for Android, prepared in FireMonkey still a problem?
Answer: It never was a problem. A “hello world” app in FireMonkey is larger than an equivalent app in Java because FireMonkey is including a lot of other additional libraries and features for building more complicated apps. There is a lot you can do to make a FireMonkey app smaller, but you give up functionality. If you look at real apps you will see that a Java based app and a FireMonky based app are much closer to the same size.
Before 10.3 Rio when you used a a platform-native control, like TWebBrowser or TMediaPlayer, you were not able to put other controls on top of them. That stacking of controls is knowns as Z-Order. This was especially annoying when you were using them with the TMultiView (one of my favorite controls), because the drawer would slide out under instead of over the platform-native control. There were ways around it, but it was still frustrating.
In XE7 we introduced the ControlType property for iOS, and then in Seattle we brought it to Windows. Setting it to Platform switches a FireMonkey control to a platform-native control at runtime.
Now with the upcoming 10.3 Rio release the ControlType property is coming to Android, and it is brining two significant benefits: More Native Controls, and corrected Z-Ordering.
More Android Native Controls
The TWebBrowser, TMediaPlayer, TBannerAd, and TMapView are always platform native controls (they are rendered by the underlying Android OS and not by FireMonkey.) But in 10.3 Rio there are 4 new controls that are optionally platform native.
That means when you set the ControlType property on these controls they will be rendered by the Android system instead of FireMonkey. You may notice some slight changes in the way they look and work because of this.
This is especially important in the TEdit as there are certain behaviors that are attached to the way users provide keyboard input and edit text. Here are some of the advantages your users will now have when you use a ControlType of Platform with your TEdit
Auto-Correction: Words are suggested while typing, these can be used by clicking on the space bar.
Define: You can select a word and click on Define to see the definition of such word in the dictionary.
“.” Shortcut: Double tapping the space bar inserts a period followed by a space.
Text Shortcuts:? That will expand into the word or phrase as you type.
Some of these behaviors vary from one Android platform to others (for example Samsung has a Clipboard feature). You can configure these settings on your Android devices in Settings > General > Keyboard.
Native Aware Android Z-Ordering
Additionally many controls now are able to handle a Z-Order over a platform native control. Now you can put control buttons over your TMediaPlayer for example. These controls have a ControlType property that when you set it to Platform it will maintain the Z-Order with other platform-native controls.
Setting their ControlType to Platform doesn’t make these platform-native, it just makes them work correctly with other platform native controls.
10.3 Rio is in beta (which means these features are subject to change) and available to update subscription customers. Once it is released you can learn more about all of these features in the DocWiki. Also, if you are already using Platform native ControlType on iOS or Windows then those control will take advantage of the Android Platform native ControlType right away!
Inline variables is one of the cool new feature coming in 10.3. The obvious huge use case is loop control variables, but I just discovered another great use case while reviewing some code.
var1, var2: Integer;
// use var1
// use var1 &amp;amp;amp;amp; var2
This is a pattern I see a lot, and it generates a hint on var2 being unused based on the current compiler directive status.
[dcc32 Hint] myUnit.pas(123): H2164 Variable 'var2' is declared but never used in 'DoesSomething'
Now there are a number of ways to deal with this with more compiler directives, which is what I’ve done in the past, but I never like adding more compiler directives. It makes the code way more complicated and harder to maintain. Now with Inline Variables I can simplify it, make it easier to maintain, and hande the hint! (all of which makes me so happy!)
// use var1
var var2: Integer;
// use var1 and var2
What are some interesting ways you see inline variables benefiting you?
Cosplay (aka costume-play) takes the fun and imagination of childhood dress-up to extreme levels only justifiable by an adult! Not only is it expensive, and needs a large time commitment, but it is rarely comfortable.
Comic conventions are the usual place to find cosplay, but Halloween is also a good excuse for some cosplay fun. I’m a huge fan of creative cosplay and love getting my picture with cosplayers.
I’m a big fan of both the book and the original RPG and am looking forward to the video game. I combined elements from all three sources for my cosplay. The character V is more of a Street Samurai / Solo, while I wanted to go for more of a Decker / Netrunner (a little Shadowrun RPG influence in there too).
I didn’t have my RGB Shades in time for Salt Lake FanX, so I justed glued some extra LEDs (NeoPixel 4×4 grids) to my face. They represent cybernetic enhancements, which is why I left the wires exposed. I used an Arduino MEGA 2560 by ELEGOO as the controller. It also controlled the string of NeoPixel lights in the collar. I attached a Bluetooth keyboard to one wrist and an Android Pixel phone to the other. The phone was decorative for now.
Later I got my RGB LED Shades which will become the key to my outfit for this Halloween. The RGB LED Shades use an Arduino Mini as the brains. I added an HC-06 Serial Bluetooth module to control the leds remotely.
After soldering the HC-06 onto my shades I can power them up and pair my Android phone with the HC-06 module. One note about my soldering is that if you look you will see that it is connected to two analog pins instead of digital pins. On most Arduinos the analog pins can double as digital pins (see the Pinout).
After that, a TBluetooth component is able to open a socket to the shades. Start the pairing with Bluetooth1.DiscoverDevices( 5000 ); In the DiscoveryEnd event handler the following code will open a socket to the HC-06 module (Thanks to Boian Mitov for the basis of this code):
ADevice : TBluetoothDevice;
AService : TBluetoothService;
for ADevice in ADeviceList do
// HC-06 is the name of the bluetooth device
if ADevice.DeviceName = 'HC-06' then
Bluetooth1.Pair( ADevice );
for AService in ADevice.LastServiceList do
// FSocket is a TBluetoothSocket with larger scope
FSocket := ADevice.CreateClientSocket(
AService.UUID, False );
If Assigned( FSocket ) then
Once the socket is open you can send characters with this code.
I took my RGB Shades with me to Sao Paulo Brazil for the 10.3 Rio preview. Even though the Bluetooth worked before the conference, my phone couldn’t make the connection on stage. When I opened my phone’s Bluetooth connection window it was obvious that with 750+ people in attendance there were a few hundred Bluetooth devices broadcasting on the same wavelength.
My next project involves Bluetooth LE with these RGB LED Steampunk Goggles.
I built them a year ago from an AdaFruit kit. Later I added a Bluetooth LE Module to make them controllable. Unfortunately, my soldering didn’t hold up and I need to rebuild them. This makes them both my previous and next cosplay project.
I’m considering salvaging the NeoPixels and rebuilding them with an ESP32 microcontroller. The ESP32 is a little larger than the original Trinket microcontroller. This is because it has integrated Bluetooth LE, WiFi, and more pins. I’d also like to get some 50% mirrors to create an infinite LED tunnel effect (I’ll post pictures when I get them – it is really amazing).
I’ve worked with the TBluetoothLE component before and it is even easier to work with than TBluetooth. So I’m really looking forward to this project.
On the Arduino side, you can use the Arduino IDE and flex your C programming skills. Or you can do like I usually do and use Visuino by Boian Mitov of Mitov Software. It provides a visual drag and drop interface for programming Arduino devices. It won the Embarcadero Cool App contest in April 2017 as Boian used Delphi to develop Visuino. Boian also recently added RGB LED Shades support to Visuino (along with unboxing and assembly videos.)
I think Boian is a great guy who makes some great technology. Most of it has a free version and the commercial prices are very reasonable too. He is always very helpful as well.
So what’s next (after the Bluetooth LE RGB Steampunk Goggles obviously)? I’m working on a design for an electronic physical polyhedral die with Bluetooth LE. So you roll a physical die of a single size and it can become any number of sides you need, all controlled via your phone. Did I mention how much of a nerd I am?