B4A Tutorial Collection of tutorials in PDF format. B4A Library Printing and Pdf creation. B4A Tutorial [java] Creating libraries for Basic4android. raudone.info - Download as PDF File .pdf), Text File .txt) or read online. raudone.info For those new to Basic4Android, new to BASIC, or even new to programming, this book As a PDF or EPUB document from the Penny Press store go here.
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6. B4A User's Guide. 2 Conditional compilation. In computer programming, conditional compilation is compilation implementing methods which. B4A - The simplest way to develop real-world, native Android apps! B4A includes all the features needed to quickly develop any type of Android app. B4A is. pages of tutorials, covering the main concepts of Android programming.
Load Layout1 file if it is not opened. Choose "New Variant" and choose x second option.
Free source code, tutorials and articles - Basic4android
Note that the device layout details appear under the list of variants. Change the layout to be similar to this: 18 You can change the current selected variant and see how it affects the visual layout. Save the layout and run the program. Change the emulator orientation and see how the layout changes accordingly. Android destroys the old activity and creates a new activity each time the orientation changes.
Therefore Activity. LoadLayout will be called again each time. Unfortunately the number will also be randomly chosen again each time. This can be easily fixed But not in this tutorial. The project is attached. This method creates a zip file with all the required files. The list includes a description for most items.
The tool tip might hide some important code that you now need. You can hide it by pressing escape. You can also turn it almost invisible by pressing the ctrl key. Another press will return it to be fully opaque. These logs are very useful for debugging.
You can log messages with the Log keyword. In order to start displaying the logs you press on the Connect button. The logs can be filtered and then you only see messages generated by Basic4android or your application. Note that if you have more than one device connected you can switch to a different device by pressing on the Connect button.
Designer generated members tool - This tool allows you to add the declaration code for the designer views and to add event subs. Note that you only need to declare views that you intend to access by code. Nothing will happen if you select an existing item there will be no duplicated code.
The status bar at the bottom of the screen displays the progress of the process and when the installation is completed. A short sound will notify you if the process failed. In that case you may need to compile regularly F5 in order to see the error message it depends on the type of error. Working with multiple connected devices - In many cases you have more than one device connected. For any operation that starts a connection you will be shown the list of connected device and you will choose the target device.
If you compile in the background the last device will be used again. This is usually more convenient than compiling in the foreground and selecting the target device each time. Designer - Duplicate - You can duplicate any view by selecting the view and then choosing Tools - Duplicate View. If the view has child views then all its child views will be duplicated as well.
Export as zip - Export as zip option creates a zip file with all the required project files. This is useful when you want to share your project with others or create a backup. It is located under Files menu. These are 22 files that are generated during compilation.
Clean unused files deletes files that are located under the Files folder but are not used by the project it will not delete any file reference by any of the project layouts.
A list of unused files will be displayed before deletion and allows you to cancel the operation. This menu opens the manager.
Note that there is no need to keep the AVD manager open after starting an emulator. Events subs signatures -There is a special auto complete feature that can help you write the event subs signatures.
Start with writing Sub followed by a space: A message will appear as in the image. Press Tab key: A list will be displayed with all the available types that have at least one event.
Choose the required type and press enter.
Choose the specific event. Code similar to the following code will be generated: 23 The EventName string will be selected. Change it to match the object "EventName" value and press enter.
That's it. Designer top most property - The designer has a "top most" check box which you can use to keep the designer as the top most form. This is useful when working with the designer and the emulator on a small screen. Debugging data - By default Basic4android compiler adds some debugging data to your code.
This data is used when an error occurs. It allows the program to show the original code line which raised the error. This data does take some space and may impact performance, though it usually should be insignificant. You can remove this data by unchecking Project - Include Debug Information.
This utility allows you to browse and search the documentation and the forum posts from the desktop. It automatically checks for updated libraries and forum posts during start-up. The libraries manuals are downloaded and stored locally. The search functionality is built using Lucene. For now there is no installation step. You should unzip the file and run B4A-HelpViewer. Note that it should not be located under Program Files as it needs "write permissions".
Download link B4A-Bridge a new way to connect to your device Currently there are two ways which you can use to test your application during development.
You can either work with the Android emulator or if your device supports ADB debugging, you can connect to your real device. The Android emulator is very slow compared to a real device especially with applications installation. Therefore in most cases it is more convenient to work with a real device.
Personally I'm only using the emulator when working with the visual designer. However not all devices support ADB debugging.
This is exactly the reason for the new B4A-Bridge tool. B4A-Bridge is made of two components.
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One component runs on the device and allows the second component which is part of the IDE to connect and communicate with the device. The connection is done over a network B4A-Bridge cannot work if there is no network available. Android doesn't allow applications to quietly install other applications, therefore when you run your application using B4A-Bridge you will see a dialog asking for your approvement.
First you need to install B4A-Bridge on your device. B4A-Bridge is also available in Android market. Search for: B4A Bridge. Note that you need to allow install of applications from "Unknown sources". This is done by choosing Settings from the Home screen - Manage Applications.
Run B4A-Bridge on your device. It will display a screen similar to: 26 Status will be: Waiting for connections. You will need to enter the IP address that appears on the device screen. The status bar at the bottom of the screen shows the current status: That's it. When B4A-Bridge gets connected it first checks if the designer application needs to be updated. In that case it will first install the designer application. B4A-Bridge keeps running as a service until you press on the Stop button.
You can always reach it by opening the notifications screen: 27 Pressing on the notification will open the main screen. As mentioned above, when you run an application you are required to approve the installation. You will usually see the following screens: In the above dialog you should choose Open to start the application.
If you try to install an existing application signed with a different key, the install will fail without any meaningful message. You should first uninstall the existing application. Go to the home screen - Settings - Applications - Manage applications - choose the application - Uninstall. B4A is able to create apps, widgets, and games. There is also a beginners guide that is updated after each new release of the IDE.
For a history of releases please see the B4A Changelog. B4i is capable of creating applications that target iPhone and iPad devices and there is a service which allows developers to compile and publish apps without the need for a local Mac computer.
The first public version was released on November 14, The latest release was released on January 17th, For a history of B4i releases see the B4i Changelog. The first public version was released on December 4, The latest public version was released on December 31st, For a history of releases please see the B4J Changelog.You can see it under the "Files" tab in the IDE right pane.
This can be easily fixed Therefore nothing bad will happen if the emulator crashes or is turned off. Likewise, there is more support for Android Studio. Tip: When working with a small monitor you may find it convenient to check the "Top Most" option in the upper right corner. First you need to install B4A-Bridge on your device.
An introduction to Basic4Android – a simple tool for building powerful Android apps
Note that the device layout details appear under the list of variants. Designer top most property - The designer has a "top most" check box which you can use to keep the designer as the top most form. Java is also much more object oriented than Basic4Android.
The status bar at the bottom of the screen displays the progress of the process and when the installation is completed.
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