ira's profile - activity

Hi all

I tried to follow the instruction here (http://docs.rosjava.googlecode.com/hg/rosjava_core/html/installing.html) to install rosjava using rosws and got an error during the last step : rosws update

Error shows:

ERROR: Error processing 'rosjava_core' : checkout() got an unexpected keyword argument 'verbose'

Any idea of this problem? Thanks a lot.

Hi all,

I run my program on a real device with 1GB memory. I tried to use OccupancyGridLayer to display map message i got from robot. However, after about 10s processing, I got OutOfMemoryError and the app was forced to stop. Does anyone have the same problem? Is there any way to solve this problem?

Thanks a lot!

Hi,

I am new to opengl, and I have some questions about presenting laserscan data on android. In the tutorial code (android_tutorial_teleop), triangle fan shape is used to present laser scan data. Why triangle fan shape is chosen here to present the data? Can we use just point shape instead?

Hi,

I followed the instruction on this page http://docs.rosjava.googlecode.com/hg/rosjava_core/html/index.html tried to install and build rosjava. Everything went well until the test step. I executed the command "./gradlew test" and got the following failing message:

Test org.ros.internal.message.MessageSerializationTest FAILED
131 tests completed, 16 failures

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':rosjava:test'.
> There were failing tests. See the report at /home/iratao/my_workspace/rosjava_core/rosjava/build/reports/tests.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Does anyone has an idea about this failure?

hi all,

I would like to ask a general question. Right now, i am trying to test ros android examples on android emulator. I would like to know how well android emulator support those examples? Do i need a real android phone to test those examples?

Thanks

Hi,

I followed the instructions on the webpage(http://docs.rosjava.googlecode.com/hg/rosjava_core/html/index.html and http://docs.rosjava.googlecode.com/hg/android_core/html/index.html) to download, install and build rosjava and android_core on my computer. I got 100% "BUILD SUCCESSFUL" except a bunch of warnings while building android_tutorial_% package. The warning all look like these:

[dx] warning: Ignoring InnerClasses attribute for an anonymous inner class
[dx] (jnamed$1) that doesn't come with an
[dx] associated EnclosingMethod attribute. This class was probably produced by a
[dx] compiler that did not target the modern .class file format. The recommended
[dx] solution is to recompile the class from source, using an up-to-date compiler
[dx] and without specifying any "-target" type options. The consequence of ignoring
[dx] this warning is that reflective operations on this class will incorrectly
[dx] indicate that it is *not* an inner class.

Also, when I import the android_tutorial_image_transport into eclipse, I can not launch it in the emulator and got the following errors:

E/AndroidRuntime(428): FATAL EXCEPTION: main

E/AndroidRuntime(428): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{org.ros.android.android_tutorial_image_transport/org.ros.android.android_tutorial_image_transport.MainActivity}: java.lang.ClassNotFoundException: org.ros.android.android_tutorial_image_transport.MainActivity in loader dalvik.system.PathClassLoader[/data/app/org.ros.android.android_tutorial_image_transport-1.apk]

E/AndroidRuntime(428):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
E/AndroidRuntime(428):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
E/AndroidRuntime(428):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
E/AndroidRuntime(428):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
E/AndroidRuntime(428):  at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(428):  at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(428):  at android.app.ActivityThread.main(ActivityThread.java:3683)
E/AndroidRuntime(428):  at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(428):  at java.lang.reflect.Method.invoke(Method.java:507)
E/AndroidRuntime(428):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
E/AndroidRuntime(428):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
E/AndroidRuntime(428):  at dalvik.system.NativeStart.main(Native Method)

E/AndroidRuntime(428): Caused by: java.lang.ClassNotFoundException: org.ros.android.android_tutorial_image_transport.MainActivity in loader dalvik.system.PathClassLoader[/data/app/org.ros.android.android_tutorial_image_transport-1.apk]

E/AndroidRuntime(428):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
E/AndroidRuntime(428):  at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
E/AndroidRuntime(428):  at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
E/AndroidRuntime(428):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
E/AndroidRuntime(428):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)
E/AndroidRuntime(428):  ... 11 more

I found two different rosjava install uri

The one in the rosjava tutorial: https://rosjava.googlecode.com/hg

AND

The one in googlecode page: https://code.google.com/p/rosjava/

Is there any difference between these two uris and which one should i use?

Thanks a lot :>

I tried to build android app on ros. I followed the steps listed in this page: http://answers.ros.org/question/2178/rosjavajar-missing-certain-packages#3713

When I am trying to import android_gingerbread into eclipse, I got errors in class org.ros.android.views.PublishingPreviewCallback. Eclipse has problems to resolve the type org.ros.message.std_msgs.Header.

The problem code is like this

**image.header.stamp** = node.getCurrentTime();

And the full error message from eclipse is like this:

Multiple markers at this line - The type org.ros.message.std_msgs.Header cannot be resolved. It is indirectly referenced from required .class files - Header cannot be resolved to a type

Can anyone help with this problem? Thanks a lot.

Hi,

Recently i tried to build rosjava on a different computer with ROS Diamondback installed.

I checkout rosjava today with this command hg clone https://code.google.com/p/rosjava/ Then skipped the install step and go directly to this page (http://docs.rosjava.googlecode.com/hg/rosjava_core/html/building.html), try to build rosjava on my computer. And I got following failure message:

> Building > :rosjava_bootstrap:compileJava > Resolving dependencies ':rosjava_b:rosjava_bootstrap:compileJava
/home/nifti/Workspace/rosjava/rosjava_bootstrap/src/main/java/org/ros/internal/message/MessageContextFactory.java:69: cannot find symbol
symbol  : method parseFromString(java.lang.String)
location: class org.ros.internal.message.PrimitiveFieldType
            primitiveFieldType.parseFromString(value));
                              ^
Note: /home/nifti/Workspace/rosjava/rosjava_bootstrap/src/main/java/org/ros/internal/message/MessageImpl.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':rosjava_bootstrap:compileJava'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Any idea what went wrong? Is it because I was building on ros dimondback?