java - Groovy in android - launcher activity cant be found -

-

i'm trying run simple android program. issue launcher activity groovy file, it's called mainactivity.groovy , resides in java source folder. here photo of gradle dependencies , project structure:

enter image description here

and here android manifest file:

<?xml version="1.0" encoding="utf-8"?> 

<application     android:allowbackup="true"     android:icon="@mipmap/ic_launcher"     android:label="@string/app_name"     android:theme="@style/apptheme" >     <activity         android:name=".mainactivity"         android:label="@string/app_name" >         <intent-filter>             <action android:name="android.intent.action.main" />              <category android:name="android.intent.category.launcher" />         </intent-filter>     </activity> </application>

and lastly here error when run program:

07-08 17:11:49.297  20173-20173/com.example.uen229.myrxjavaandroidproject2 e/androidruntime﹕ fatal exception: main process: com.example.uen229.myrxjavaandroidproject2, pid: 20173 java.lang.runtimeexception: unable instantiate activity componentinfo{com.example.uen229.myrxjavaandroidproject2/com.example.mainactivity}: java.lang.classnotfoundexception: didn't find class "com.example.mainactivity" on path: dexpathlist[[zip file "/data/app/com.example.uen229.myrxjavaandroidproject2-1/base.apk"],nativelibrarydirectories=[/vendor/lib, /system/lib]]         @ android.app.activitythread.performlaunchactivity(activitythread.java:2209)         @ android.app.activitythread.handlelaunchactivity(activitythread.java:2360)         @ android.app.activitythread.access$800(activitythread.java:144)         @ android.app.activitythread$h.handlemessage(activitythread.java:1278)         @ android.os.handler.dispatchmessage(handler.java:102)         @ android.os.looper.loop(looper.java:135)         @ android.app.activitythread.main(activitythread.java:5221)         @ java.lang.reflect.method.invoke(native method)         @ java.lang.reflect.method.invoke(method.java:372)         @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:899)         @ com.android.internal.os.zygoteinit.main(zygoteinit.java:694)  caused by: java.lang.classnotfoundexception: didn't find class "com.example.mainactivity" on path: dexpathlist[[zip file "/data/app/com.example.uen229.myrxjavaandroidproject2-1/base.apk"],nativelibrarydirectories=[/vendor/lib, /system/lib]]         @ dalvik.system.basedexclassloader.findclass(basedexclassloader.java:56)         @ java.lang.classloader.loadclass(classloader.java:511)         @ java.lang.classloader.loadclass(classloader.java:469)         @ android.app.instrumentation.newactivity(instrumentation.java:1065)         @ android.app.activitythread.performlaunchactivity(activitythread.java:2199)             at android.app.activitythread.handlelaunchactivity(activitythread.java:2360)             at android.app.activitythread.access$800(activitythread.java:144)             at android.app.activitythread$h.handlemessage(activitythread.java:1278)             at android.os.handler.dispatchmessage(handler.java:102)             at android.os.looper.loop(looper.java:135)             at android.app.activitythread.main(activitythread.java:5221)             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:899)             at com.android.internal.os.zygoteinit.main(zygoteinit.java:694) suppressed: java.lang.classnotfoundexception: com.example.mainactivity         @ java.lang.class.classforname(native method)         @ java.lang.bootclassloader.findclass(classloader.java:781)         @ java.lang.bootclassloader.loadclass(classloader.java:841)         @ java.lang.classloader.loadclass(classloader.java:504)         ... 13 more  caused by: java.lang.noclassdeffounderror: class not found using boot class loader; no stack available

i have tried restarting pc , ide. keep in mind mainactivity has been renamed mainactivity.groovy. doing wrong ?

update: after following instructions here

i made directory structure looked following resolved issue:

enter image description here

in code have many problems:

  • groovy files should under groovy folder, not java
  • android not support groovy native language, java, need pre-compile groovy files in order let dalvik/art execute it. way applying plugin in build.gradle work you.

this great tutorial plugin on github.


Comments

Post a Comment

Popular posts from this blog

python - No exponential form of the z-axis in matplotlib-3D-plots -

-
Image
i have similar problem described in how prevent numbers being changed exponential form in python matplotlib figure : i don't want (in special case) weird scientific formatting of axis. problem different have problem @ z -axis. 2-d plots can use ax.get_yaxis().get_major_formatter().set_useoffset(false) . , there no function ax.get_zaxis() what use format z -axis same way? edit: example: from mpl_toolkits.mplot3d import axes3d import numpy np import sys import matplotlib import matplotlib.pyplot pyplot def func(xi, ti): res = 10e3 + np.cos(ti) * np.sin(xi) return res if __name__ == '__main__': timespacing = 20 timestart = 0 timeend = 1 time = np.linspace(timestart, timeend, timespacing) widthspacing = 50 widthstart = 0 widthend = 3 width = np.linspace(widthstart, widthend, widthspacing) reslist = [] matplotlib.rcparams['legend.fontsize'] = 10 fig = pyplot.figure() ax = fig.gca(projection = '3d...
Read more

php - Best Light server (Linux + Web server + Database) for Raspberry Pi -

-
i install web server database on raspberry pi (little computer). computer has 1gb ram. i want know best combination: linux distribution , web server , dbms run local server multiple users minimal latency, use php on server. , best settings performance , not have bugs (memory usage, disable plugin, disable service, etc)? i thought light debian , lighttpd server , sqlite database. solution? i think lighttpd + sqlite great choice. linux distro, debian @ centos or tiny core linux , although i'm not sure of compatibility pi. obviously, can't go wrong raspbian if want use in production , more stable performance, few more pi's , set them in cluster .
Read more

c# - "Newtonsoft.Json.JsonSerializationException unable to find constructor to use for types" error when deserializing class -

-
i developing app in xamarin android. have splash screen serialize class , pass mainactivity using intent . when try deserialize in mainactivity error message : "serializationexception unable find constructor use types" serialization : void loaddata() { currency currency = new currency(this); intent = new intent(this, typeof(mainactivity)); intent.putextra("currency", newtonsoft.json.jsonconvert.serializeobject(currency)); startactivity(intent); } deserialization : cur = newtonsoft.json.jsonconvert.deserializeobject<currency> (intent.getstringextra("currency")); // error here class constructor : public currency(context context) { thiscontext = context; } i began experiencing problem after added parameter context context constructor. has caused this? how can solve it? possible serialize/deserialize class has parameters? you need have empty constructor in currency class in order deserialize it. ...
Read more