Hi, I have tried several times the Android and Arduino Hello World Tutorial in different ways , using both ADKToolkit 0.2.0 and the latest ADKToolkit 0.3.0 from https://github.com/palazzem/adk-toolkit. See my previous post http://www.udoo.org/forum/threads/a...rld-tutorial-null-point-exception-error.3744/ The Arduino sketch works perfect but I am having trouble running the Android program. While running the app , the layout appears but once the button is clicked the app crashes (I have tried toggle button, switch, image View and button) . The log shows Null pointer Exception caused by this particular line all the time adkManager.write("1"); // the function write is used in ADKToolkit 0.3.0 instead of writeSerial from the previous version. How can you avoid this error?? Is there something missing in the adkManger class of the ADKtoolkit ? or the write function( derived from OutputStream class) be replaced by some other function??
I just had this problem last night using my Dual and the Hello World Tutorial. What I did was, was download the original files and used the adk-toolkit 0.2.0 and last night it was giving me all kinds of wierd errors of why it couldn't run and then I upgraded to Android Studio 2.0 and magically it worked. However in my manifest I changed it from "uses-feature android:name="android.hardware.usb.accessory" " to " uses-feature android:name="android.hardware.Usb.Accessory" " and haven't had any issues since.
Hi, thanks for your suggestion, I will try that, was your app successful in making the LED blink as well ?
Yeah once I did that it ran no problem. Just remember to import it into Android Studio using "Import Project" instead of "Open Existing Project" because the Udoo creators made this app with Eclipse and not Android Studio.
I ran the project by importing to Android Studio 2.0, unfortunately it again shows a null pointer exception when the turn on button is clicked. I dont know how it worked for you. Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.io.FileOutputStream.write(byte[])' on a null object reference at me.palazzetti.adktoolkit.AdkManager.writeSerial(AdkManager.java:113) at org.udoo.androidadkdemo.UDOOBlinkLEDActivity.blinkLED(UDOOBlinkLEDActivity.java:57) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at android.view.View$1.onClick(View.java:4015) at android.view.View.performClick(View.java:4780) at android.widget.CompoundButton.performClick(CompoundButton.java:120) at android.view.View$PerformClick.run(View.java:19866) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
I'm not at home right now but later today I'll upload my files that compiled and ran correctly Sent from my iPhone using Tapatalk
Adk toolkit doesn't seem to work for me . So made the whole code from scratch , referring to other websites, it works now , phew ..led blinks too . Thanks anyways.
Hi , I have uploaded the program for Android and Arduino that worked for me on my blog website. Have a look those who are interested. https://softwarehive.wordpress.com/
