I made them all class members so they can be referenced anywhere inside the class without needing to get the reference multiple times.No prior knowledge of Android development is needed, however it will help to know some basics of Java programming.I will be using an Android phone for testing purposes and not an Android virtual device.The Android app that you develop can be used with any other microcontroller, I only used the Arduino in this example with the HC-06 bluetooth module since they are both cheap and popular.
Im going to be creating other posts with different microcontrollers that use this same phone app. Some of the funtionality that I will be using was taken from the offical bluetooth SDK doc. Leave all of the other checkboxs blank since we wont be needing them. The GUI builder has similarities such as anchors and layout managers similar to Java Swing. We will be using the LinearLayout (Vertical) to make our application. Without a layout manager, your GUI components would arrange themselves differently depending on the screen size of the device. The default layout choice is the RelativeLayout and works by aligning all of the components in relation to the first component placed on the screen (or as dictated by you). You can see this effect by opening activitymain.xml found in your appreslayout folder structure and dragging a text component onto the screen. Making an app using this RelativeLayout is straightforward and easy, but often causes headaches with larger or smaller screens than the one you are developing on. Then drag a checkbox from the Palette to your main activity screen and double-click on it to call it Toggle LED. This checkbox will be used to turn ON and OFF an LED on the Arduino. You can view this by clicking on the lower-left hand side of the viewport where it says Text. Simple Board To Control Cctalk Devices With Arduino Code On TheThe demo code on the Arduino will be simply incrementing a 32-bit counter variable. These two textviews will be on the same line, side-by-side, and fill the horizontal width of your phone. The RX: label will fill 10 of the width with the rest going to be displaying the received data. It will indicate if its on, off, connecting to a device, or if a connection failed. Now we are going to write Java to interact with our components. Please note that the code be referencing the GUI via each components ID. We need to do the same thing to our app and tell the user that this application will require access to the bluetooth module. ![]() ![]()
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