DJI Drones

[Mr Blue Sky]

hello EREL in your example the library reference DJIMissionManager is missing

 

[Erel]

Which one of the examples? Are you using the latest version of DJI library?

 

[Mr Blue Sky]

Hi Erel yes i use b4a 8.0 last drone firmware and last DJI library 4.41 too. I check too with library helper and don't have inside DJIMissionManager

 

[Erel]

This class was removed when DJI changed the SDK. See the Drone Mission example.

 

[Mr Blue Sky]

thank you erel

 

[DonManfred]

1. Register with DJI: https://developer.dji.com/ and create an app in the User Center page. You will see an App Key that you need to add to the manifest editor.

May i suggest to add the info that the Bundle Identifier in the console must match the Packagename!

 

[ELCHARO]

Hello Erel!

I run the app. In Samsung S7 Edge. The problem is the screen are inverse and can't rotate. All apps do is no android problem. Rotation is enable.
But the djidemo (both) are inverted and is imposible to rotate (fixed)
What can i do?

Thanks

 

[Erel]

The demo sets the orientation to the standard landscape orientation. You can change it with the #SupportedOrientations attribute.
For further discussion please start a new thread.

 

[Roberto P.]

Hi,
I tried to compile your examples, but I have these errors. What can they be?
thank you
regards

 

[DonManfred]

1. You should start a new thread for any Question you have!
2. You should post errors as TEXT instead of an Image

 

[Roberto P.]

1. You should start a new thread for any Question you have!
2. You should post errors as TEXT instead of an Image

Ok DonManfred,
next time I create new thread.

here is error in text format:

Logger connected to: 1TSB3DF72B
--------- beginning of system
--------- beginning of main
**************************** BaseApplication **************************
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
main$ResumableSub_Activity_Createresume (java line: 383)
java.lang.VerifyError: Verifier rejected class dji.sdk.sdkmanager.DJISDKManager due to bad method void dji.sdk.sdkmanager.DJISDKManager.<init>() (declaration of 'dji.sdk.sdkmanager.DJISDKManager' appears in /data/app/b4a.dji.test1-1/base.apk:classes2.dex)
at anywheresoftware.b4a.objects.DJISDKManagerWrapper.Initialize(DJISDKManagerWrapper.java:44)
at b4a.dji.test1.main$ResumableSub_Activity_Create.resume(main.java:383)
at b4a.dji.test1.main._activity_create(main.java:344)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
at b4a.dji.test1.main.afterFirstLayout(main.java:102)
at b4a.dji.test1.main.access$000(main.java:17)
at b4a.dji.test1.main$WaitForLayout.run(main.java:80)
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:5282)
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:966)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
(Exception) java.lang.Exception: java.lang.VerifyError: Verifier rejected class dji.sdk.sdkmanager.DJISDKManager due to bad method void dji.sdk.sdkmanager.DJISDKManager.<init>() (declaration of 'dji.sdk.sdkmanager.DJISDKManager' appears in /data/app/b4a.dji.test1-1/base.apk:classes2.dex)
** Activity (main) Resume **
main_activity_resume (java line: 457)
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean dji.sdk.sdkmanager.DJISDKManager.hasSDKRegistered()' on a null object reference
at anywheresoftware.b4a.objects.DJISDKManagerWrapper.getRegistered(DJISDKManagerWrapper.java:87)
at b4a.dji.test1.main._activity_resume(main.java:457)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:166)
at b4a.dji.test1.main.afterFirstLayout(main.java:108)
at b4a.dji.test1.main.access$000(main.java:17)
at b4a.dji.test1.main$WaitForLayout.run(main.java:80)
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:5282)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:966)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
(NullPointerException) java.lang.NullPointerException: Attempt to invoke virtual method 'boolean dji.sdk.sdkmanager.DJISDKManager.hasSDKRegistered()' on a null object reference
** Activity (main) Pause, UserClosed = true **
No wakelock.
**************************** BaseApplication **************************
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
main$ResumableSub_Activity_Createresume (java line: 412)
java.lang.VerifyError: Verifier rejected class dji.sdk.sdkmanager.DJISDKManager due to bad method void dji.sdk.sdkmanager.DJISDKManager.<init>() (declaration of 'dji.sdk.sdkmanager.DJISDKManager' appears in /data/app/b4a.dji.test1-2/base.apk:classes2.dex)
at anywheresoftware.b4a.objects.DJISDKManagerWrapper.Initialize(DJISDKManagerWrapper.java:44)
at b4a.dji.test1.main$ResumableSub_Activity_Create.resume(main.java:412)
at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(BA.java:240)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:180)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:166)
at anywheresoftware.b4a.keywords.Common$14.run(Common.java:1717)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5282)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:966)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
(Exception) java.lang.Exception: java.lang.VerifyError: Verifier rejected class dji.sdk.sdkmanager.DJISDKManager due to bad method void dji.sdk.sdkmanager.DJISDKManager.<init>() (declaration of 'dji.sdk.sdkmanager.DJISDKManager' appears in /data/app/b4a.dji.test1-2/base.apk:classes2.dex)
main$ResumableSub_btnStartMission_Clickresume (java line: 708)
java.lang.VerifyError: Verifier rejected class dji.common.mission.waypoint.WaypointMission$Builder due to bad method void dji.common.mission.waypoint.WaypointMission$Builder.<init>(dji.midware.data.model.P3.DataFlycDownloadWayPointMissionMsg) (declaration of 'dji.common.mission.waypoint.WaypointMission$Builder' appears in /data/app/b4a.dji.test1-2/base.apk)
at anywheresoftware.b4a.objects.WaypointMissionOperatorWrapper$WaypointMissionBuilderWrapper.Initialize(WaypointMissionOperatorWrapper.java:134)
at b4a.dji.test1.main$ResumableSub_btnStartMission_Click.resume(main.java:708)
at b4a.dji.test1.main._btnstartmission_click(main.java:682)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:186)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:170)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:166)
at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
at android.view.View.performClick(View.java:4809)
at android.view.View$PerformClick.run(View.java:20006)
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:5282)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:966)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
(Exception) java.lang.Exception: java.lang.VerifyError: Verifier rejected class dji.common.mission.waypoint.WaypointMission$Builder due to bad method void dji.common.mission.waypoint.WaypointMission$Builder.<init>(dji.midware.data.model.P3.DataFlycDownloadWayPointMissionMsg) (declaration of 'dji.common.mission.waypoint.WaypointMission$Builder' appears in /data/app/b4a.dji.test1-2/base.apk)
** Activity (main) Pause, UserClosed = true **

thank you

 

[Erel]

Why have you removed the "ReferenceOnly" attribute? Which version of B4A are you using?

 

[DonManfred]

here is error in text format

Which version of B4A are you using?

I guess a Version <8
@Roberto P.

Version 4.41 is released. It is based on DJI SDK v4.41. It supports waypoint missions
It requires B4A v8+ (not yet released).
The minimum Android version is 5.0.

 

[Roberto P.]

I guess a Version <8
@Roberto P.

I've installed 7.8 version.
For Erel, because don't compile with the parameter.

Read now it's that it's required release 8. I update and try.
thank

 

[Erel]

I tried to compile your examples

For Erel, because don't compile with the parameter.

You must add such information when you say that you are running the example. We cannot guess which changes you made to the example...

 

[Roberto P.]

ok, excuse me

 

[Roberto P.]

Hi,
after following all the steps successfully, I can not make the app connect with the drone.

** Activity (main) Pause, UserClosed = false **
**************************** BaseApplication **************************
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
Registered successfully!
activation state: UNKNOWN
binding state: UNKNOWN
activation listener added
No connected product

The DJI app connects.

Can you tell me what I have to do to make it connect?

thank you

 

[Erel]

Please start a new thread in the questions forum.

 

[Michael S King]

SUPER COOL! Question? Can you control the camera with this? Specifically I want to change the shutter speed and then capture an image programmatically. In essence, I want to create an true automatic exposure bracketing routine with more control than the built in disaster lacking any imagination.

These kind of things will really inspire a programmer. Sure, I could make an app to fly the Drone but photography and cinematography is why we fly. creating a beautiful HDR (High dynamic range) photograph requires exposure bracketing. from what i read of DJI's version, they change the ISO to create the AEB. I want to not only change the shutter speed but change the number of exposures to infinity if I choose. So essentially:

• Take and image at the current Shutter speed
• Drop 1 f stop and take another image
• drop 2 f stops and take and image
• Drop 3 f stops and take an image
• drop 4 f stops and take an image
• return to original shutter speed
• add 1 f stop take and image
• add 2 f stops and take and image
• add 3 f stops and take and image
  
• add 4 f stops and take and image
  
• alet me that it is finished.

 

[Erel]

Version 4.50 is released. It is based on DJI SDK v4.11.1. It works with 64 bit devices and it is compatible with AndroidX SDK.
It requires B4A v9.5+.

There are some changes in the events. The ProductConnectivityChanged event was removed and there is a new BindingStateChanged event that is used instead.
See the two examples.