Android Question [Solved] B4A error in a JRDC2 database example

RAFA BRAVO · Oct 25, 2020

I am trying to create an article database with the JRDC2 example. In android I use the DBRequestManager module and an error occurs when compiling in B4A. Can anybody help me?

LOGS:

B4X:

Registro conectado a:  Xiaomi Mi 9T
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
dbrequestmanager_sendjob (java line: 395)
java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/http/client/methods/HttpPost;
    at anywheresoftware.b4a.http.HttpClientWrapper$HttpUriRequestWrapper.InitializePost2(HttpClientWrapper.java:395)
    at anywheresoftware.b4a.samples.httputils2.httpjob._postbytes(httpjob.java:185)
    at b4a.mySQL.dbrequestmanager._sendjob(dbrequestmanager.java:395)
    at b4a.mySQL.dbrequestmanager._executequery(dbrequestmanager.java:181)
    at b4a.mySQL.main$ResumableSub_GetRecord.resume(main.java:499)
    at b4a.mySQL.main._getrecord(main.java:465)
    at b4a.mySQL.main._activity_create(main.java:420)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:213)
    at b4a.mySQL.main.afterFirstLayout(main.java:105)
    at b4a.mySQL.main.access$000(main.java:17)
    at b4a.mySQL.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:201)
    at android.app.ActivityThread.main(ActivityThread.java:6861)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
Caused by: java.lang.ClassNotFoundException: Didn't find class "org.apache.http.client.methods.HttpPost" on path: DexPathList[[zip file "/data/app/b4a.mySQL-ikkCf8sGQQ7jiHZSpSjedw==/base.apk"],nativeLibraryDirectories=[/data/app/b4a.mySQL-ikkCf8sGQQ7jiHZSpSjedw==/lib/arm64, /system/lib64]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:171)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    ... 19 more
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
dbrequestmanager_sendjob (java line: 395)
java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/http/client/methods/HttpPost;
    at anywheresoftware.b4a.http.HttpClientWrapper$HttpUriRequestWrapper.InitializePost2(HttpClientWrapper.java:395)
    at anywheresoftware.b4a.samples.httputils2.httpjob._postbytes(httpjob.java:185)
    at b4a.mySQL.dbrequestmanager._sendjob(dbrequestmanager.java:395)
    at b4a.mySQL.dbrequestmanager._executequery(dbrequestmanager.java:181)
    at b4a.mySQL.main$ResumableSub_GetRecord.resume(main.java:499)
    at b4a.mySQL.main._getrecord(main.java:465)
    at b4a.mySQL.main._activity_create(main.java:420)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:213)
    at b4a.mySQL.main.afterFirstLayout(main.java:105)
    at b4a.mySQL.main.access$000(main.java:17)
    at b4a.mySQL.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:201)
    at android.app.ActivityThread.main(ActivityThread.java:6861)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
Caused by: java.lang.ClassNotFoundException: Didn't find class "org.apache.http.client.methods.HttpPost" on path: DexPathList[[zip file "/data/app/b4a.mySQL-ikkCf8sGQQ7jiHZSpSjedw==/base.apk"],nativeLibraryDirectories=[/data/app/b4a.mySQL-ikkCf8sGQQ7jiHZSpSjedw==/lib/arm64, /system/lib64]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:171)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    ... 19 more
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
dbrequestmanager_sendjob (java line: 395)
java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/http/client/methods/HttpPost;
    at anywheresoftware.b4a.http.HttpClientWrapper$HttpUriRequestWrapper.InitializePost2(HttpClientWrapper.java:395)
    at anywheresoftware.b4a.samples.httputils2.httpjob._postbytes(httpjob.java:185)
    at b4a.mySQL.dbrequestmanager._sendjob(dbrequestmanager.java:395)
    at b4a.mySQL.dbrequestmanager._executequery(dbrequestmanager.java:181)
    at b4a.mySQL.main$ResumableSub_GetRecord.resume(main.java:499)
    at b4a.mySQL.main._getrecord(main.java:465)
    at b4a.mySQL.main._activity_create(main.java:420)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:213)
    at b4a.mySQL.main.afterFirstLayout(main.java:105)
    at b4a.mySQL.main.access$000(main.java:17)
    at b4a.mySQL.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:201)
    at android.app.ActivityThread.main(ActivityThread.java:6861)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
Caused by: java.lang.ClassNotFoundException: Didn't find class "org.apache.http.client.methods.HttpPost" on path: DexPathList[[zip file "/data/app/b4a.mySQL-MJVL5Gb-CCXw-yUtA6gB4g==/base.apk"],nativeLibraryDirectories=[/data/app/b4a.mySQL-MJVL5Gb-CCXw-yUtA6gB4g==/lib/arm64, /system/lib64]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:171)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    ... 19 more
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
dbrequestmanager_sendjob (java line: 395)
java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/http/client/methods/HttpPost;
    at anywheresoftware.b4a.http.HttpClientWrapper$HttpUriRequestWrapper.InitializePost2(HttpClientWrapper.java:395)
    at anywheresoftware.b4a.samples.httputils2.httpjob._postbytes(httpjob.java:185)
    at b4a.mySQL.dbrequestmanager._sendjob(dbrequestmanager.java:395)
    at b4a.mySQL.dbrequestmanager._executequery(dbrequestmanager.java:181)
    at b4a.mySQL.main$ResumableSub_GetRecord.resume(main.java:499)
    at b4a.mySQL.main._getrecord(main.java:465)
    at b4a.mySQL.main._activity_create(main.java:420)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:213)
    at b4a.mySQL.main.afterFirstLayout(main.java:105)
    at b4a.mySQL.main.access$000(main.java:17)
    at b4a.mySQL.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:201)
    at android.app.ActivityThread.main(ActivityThread.java:6861)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
Caused by: java.lang.ClassNotFoundException: Didn't find class "org.apache.http.client.methods.HttpPost" on path: DexPathList[[zip file "/data/app/b4a.mySQL-MJVL5Gb-CCXw-yUtA6gB4g==/base.apk"],nativeLibraryDirectories=[/data/app/b4a.mySQL-MJVL5Gb-CCXw-yUtA6gB4g==/lib/arm64, /system/lib64]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:171)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    ... 19 more
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
dbrequestmanager_sendjob (java line: 395)
java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/http/client/methods/HttpPost;
    at anywheresoftware.b4a.http.HttpClientWrapper$HttpUriRequestWrapper.InitializePost2(HttpClientWrapper.java:395)
    at anywheresoftware.b4a.samples.httputils2.httpjob._postbytes(httpjob.java:185)
    at b4a.mySQL.dbrequestmanager._sendjob(dbrequestmanager.java:395)
    at b4a.mySQL.dbrequestmanager._executequery(dbrequestmanager.java:181)
    at b4a.mySQL.main$ResumableSub_GetRecord.resume(main.java:499)
    at b4a.mySQL.main._getrecord(main.java:465)
    at b4a.mySQL.main._activity_create(main.java:420)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:213)
    at b4a.mySQL.main.afterFirstLayout(main.java:105)
    at b4a.mySQL.main.access$000(main.java:17)
    at b4a.mySQL.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:201)
    at android.app.ActivityThread.main(ActivityThread.java:6861)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
Caused by: java.lang.ClassNotFoundException: Didn't find class "org.apache.http.client.methods.HttpPost" on path: DexPathList[[zip file "/data/app/b4a.mySQL-1XSQ5tPwfCa-w3z_mkcKEw==/base.apk"],nativeLibraryDirectories=[/data/app/b4a.mySQL-1XSQ5tPwfCa-w3z_mkcKEw==/lib/arm64, /system/lib64]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:171)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    ... 19 more
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
dbrequestmanager_sendjob (java line: 395)
java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/http/client/methods/HttpPost;
    at anywheresoftware.b4a.http.HttpClientWrapper$HttpUriRequestWrapper.InitializePost2(HttpClientWrapper.java:395)
    at anywheresoftware.b4a.samples.httputils2.httpjob._postbytes(httpjob.java:185)
    at b4a.mySQL.dbrequestmanager._sendjob(dbrequestmanager.java:395)
    at b4a.mySQL.dbrequestmanager._executequery(dbrequestmanager.java:181)
    at b4a.mySQL.main$ResumableSub_GetRecord.resume(main.java:499)
    at b4a.mySQL.main._getrecord(main.java:465)
    at b4a.mySQL.main._activity_create(main.java:420)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:213)
    at b4a.mySQL.main.afterFirstLayout(main.java:105)
    at b4a.mySQL.main.access$000(main.java:17)
    at b4a.mySQL.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:201)
    at android.app.ActivityThread.main(ActivityThread.java:6861)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
Caused by: java.lang.ClassNotFoundException: Didn't find class "org.apache.http.client.methods.HttpPost" on path: DexPathList[[zip file "/data/app/b4a.mySQL-1XSQ5tPwfCa-w3z_mkcKEw==/base.apk"],nativeLibraryDirectories=[/data/app/b4a.mySQL-1XSQ5tPwfCa-w3z_mkcKEw==/lib/arm64, /system/lib64]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:171)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    ... 19 more

Erel · Oct 26, 2020

org.apache.http.client = very old http library.
Remove any reference to Http or HttpUtils2.

Use OkHttpUtils2.

Make sure to use B4A v10.2.

RAFA BRAVO · Oct 26, 2020

Thank you, make the changes and the error disappeared. A new problem appears, the network security policy does not allow communication with the server.

log:

log:

Registro conectado a:  Xiaomi Mi 9T
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = true **
** Activity (main) Create, isFirst = false **
** Activity (main) Resume **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = true **
** Activity (main) Create, isFirst = false **
** Activity (main) Resume **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (main) Create, isFirst = false **
** Activity (main) Resume **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
Registro conectado a:  Xiaomi Mi 9T
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = true **
** Activity (main) Create, isFirst = false **
** Activity (main) Resume **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = true **
** Activity (main) Create, isFirst = false **
** Activity (main) Resume **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (main) Create, isFirst = false **
** Activity (main) Resume **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = true **
** Activity (main) Create, isFirst = false **
** Activity (main) Resume **
ResponseError. Reason: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy, Response:
ERROR: java.net.UnknownServiceException: CLEARTEXT communication to 192.168.18.16 not permitted by network security policy
** Activity (main) Pause, UserClosed = false **

TILogistic · Oct 26, 2020

Add this line to your Manifest:
SetApplicationAttribute(android:usesCleartextTraffic, "true")

Take a look at this link

RAFA BRAVO · Oct 26, 2020

Thanks, I think I am moving forward because I have already managed to see the list of variables from the database in the log. but an error appears again, and I don't know why.

Log:

log:

Registro conectado a:  Xiaomi Mi 9T
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
Registro conectado a:  Xiaomi Mi 9T
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
(MyMap) {Id=0, Name=1, Estado=2, Image=3, Description=4}
main$ResumableSub_GetRecordresume (java line: 572)
java.lang.NumberFormatException: For input string: "null"
    at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043)
    at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
    at java.lang.Double.parseDouble(Double.java:538)
    at anywheresoftware.b4a.BA.ObjectToNumber(BA.java:684)
    at b4a.mySQL.main$ResumableSub_GetRecord.resume(main.java:572)
    at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(BA.java:267)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:207)
    at anywheresoftware.b4a.keywords.Common$11.run(Common.java:1178)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:201)
    at android.app.ActivityThread.main(ActivityThread.java:6861)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
*** Service (httputils2service) Create ***
** Service (httputils2service) Start **
(MyMap) {Id=0, Name=1, Estado=2, Image=3, Description=4}
main$ResumableSub_GetRecordresume (java line: 572)
java.lang.NumberFormatException: For input string: "null"
    at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043)
    at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
    at java.lang.Double.parseDouble(Double.java:538)
    at anywheresoftware.b4a.BA.ObjectToNumber(BA.java:684)
    at b4a.mySQL.main$ResumableSub_GetRecord.resume(main.java:572)
    at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(BA.java:267)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:207)
    at anywheresoftware.b4a.keywords.Common$11.run(Common.java:1178)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:201)
    at android.app.ActivityThread.main(ActivityThread.java:6861)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)

TILogistic · Oct 26, 2020

(MyMap) {Id=0, Name=1, Estado=2, Image=3, Description=4}
main$ResumableSub_GetRecordresume (java line: 572)
java.lang.NumberFormatException: For input string: "null"

[B4X] jRDC2 - B4J implementation of RDC (Remote Database Connector)

RDC is a middleware server that makes it simple to safely connect clients and remote SQL database servers. jRDC2 is the latest version. All new projects should use this version. jRDC2 is made of two components: - B4J server. The server receives the requests from the clients, issues the SQL...

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Bladimir Silva Toro · Oct 26, 2020

Hello @RAFA BRAVO

Look according to your error I see that you have a null reference.

java.lang.NumberFormatException: For input string: "null"

It shows the SQL queries from the jRDC2 config file, it also shows the code in B4A where you call that query.

That way it would be easier to help him.

OliverA · Oct 27, 2020

RAFA BRAVO said:
java.lang.NumberFormatException: For input string: "null"

Guess: You're trying to use NumberFormat (or NumberFormat2) with a value returned from the DB. Problem: The value returned from the DB is a Null value. Solution(s): 1) Check for Null values before using NumberFormat or 2) Setup your SQL statement not to return Null(s).
In the end, until you show some code and the query configuration (as requested by @Bladimir Silva Toro ) it's just a guess.
Update: This new issue should also be a new question on the forum, since your original issue has been solved and this is another, unrelated issue to your original post.

RAFA BRAVO · Nov 2, 2020

OliverA said:
Actualización: este nuevo problema también debería ser una nueva pregunta en el foro, ya que su problema original se ha resuelto y este es otro problema no relacionado con su publicación original.
[/CITAR]

You're right, but I finally solved everything, it was just a problem with a capital letter. thanks to everyone.

Android Question [Solved] B4A error in a JRDC2 database example

RAFA BRAVO

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[B4X] jRDC2 - B4J implementation of RDC (Remote Database Connector)

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