When trying to connect I'm getting java.lang.NoSuchMethodException: <init> [class com.mbientlab.metawear.impl.DefaultMetaWearBoard, byte, byte], can you guys help? Stacktrace and code sample is below about metawear-sdk-android HOT 9 CLOSED

Couple of questions to help debug:

• What MetaWear board are you using?
• What is the firmware revision?
• What is your development environment?
  • jdk, ide, etc.
• Can you connect to the board with the MetaWear sample app?

from metawear-sdk-android.

Many thanks for getting back to me. I tried both sample apps the very
simple one included in the Android API as well as the official Sample app
both built from sources and they both work well.

Tried to compare the code line by line and it seems identical. I tried to
embed your sample activity from the library project directly into my app
and it has the same problem. I use the same targetSdk in my app has the
right dependency to library 2.3.0.. Do you have any ideas or hints what I
could try?

Board: MetaWear R
FW: 1.1.0
IDE: Android Studio

Thank you very much.

Best regards,

Petr

On Fri, Jan 8, 2016 at 1:07 PM, Eric Tsai [email protected] wrote:

Couple of questions to help debug:

• What MetaWear board are you using?
• What is the firmware revision?
• What is your development environment?
• jdk, ide, etc.
  • Can you connect to the board with the MetaWear sample app?

—
Reply to this email directly or view it on GitHub
#5 (comment)
.

from metawear-sdk-android.

Sorry, I think I know the issue, it is probably a proguard problem, sorry
about posting a false alert..

Thank you very much.

Best regards,

Petr

On Fri, Jan 8, 2016 at 1:51 PM, Petr Nalevka [email protected] wrote:

Many thanks for getting back to me. I tried both sample apps the very
simple one included in the Android API as well as the official Sample app
both built from sources and they both work well.

Tried to compare the code line by line and it seems identical. I tried to
embed your sample activity from the library project directly into my app
and it has the same problem. I use the same targetSdk in my app has the
right dependency to library 2.3.0.. Do you have any ideas or hints what I
could try?

Board: MetaWear R
FW: 1.1.0
IDE: Android Studio

Thank you very much.

Best regards,

Petr

On Fri, Jan 8, 2016 at 1:07 PM, Eric Tsai [email protected]
wrote:

Couple of questions to help debug:

• What MetaWear board are you using?
• What is the firmware revision?
• What is your development environment?
• jdk, ide, etc.
  • Can you connect to the board with the MetaWear sample app?

—
Reply to this email directly or view it on GitHub
#5 (comment)
.

from metawear-sdk-android.

Just a suggestion, maybe you want to add some implicit proguard rules to
your sample project. Many thanks for your help on this..

Thank you very much.

Best regards,

Petr

On Fri, Jan 8, 2016 at 2:01 PM, Petr Nalevka [email protected] wrote:

Sorry, I think I know the issue, it is probably a proguard problem, sorry
about posting a false alert..

Thank you very much.

Best regards,

Petr

On Fri, Jan 8, 2016 at 1:51 PM, Petr Nalevka [email protected] wrote:

Many thanks for getting back to me. I tried both sample apps the very
simple one included in the Android API as well as the official Sample app
both built from sources and they both work well.

Tried to compare the code line by line and it seems identical. I tried to
embed your sample activity from the library project directly into my app
and it has the same problem. I use the same targetSdk in my app has the
right dependency to library 2.3.0.. Do you have any ideas or hints what I
could try?

Board: MetaWear R
FW: 1.1.0
IDE: Android Studio

Thank you very much.

Best regards,

Petr

On Fri, Jan 8, 2016 at 1:07 PM, Eric Tsai [email protected]
wrote:

Couple of questions to help debug:

• What MetaWear board are you using?
• What is the firmware revision?
• What is your development environment?
• jdk, ide, etc.
  • Can you connect to the board with the MetaWear sample app?

—
Reply to this email directly or view it on GitHub
#5 (comment)
.

from metawear-sdk-android.

Hi Petr,
I'm having the same issue. How did you fixed that?
Please can you help me to figure out what's the problem?

Thanks

from metawear-sdk-android.

Sorry, we did abandon the idea to use META Wear for our project so I could
not spend more time on this. But I believe this is somehting which needs to
fixed in the Metawear Android API - I expect a simple null check..

Thank you very much.

Best regards,

Petr

On Sun, Jan 31, 2016 at 8:35 PM, Fabio Petrucci [email protected]
wrote:

Hi Petr,
I'm having the same issue. How did you fixed that?
Please can you help me to figure out what's the problem?

Thanks

—
Reply to this email directly or view it on GitHub
#5 (comment)
.

from metawear-sdk-android.

Do you have any proguard rules? The library uses some reflection which can be broken from proguard obfuscation.

from metawear-sdk-android.

Sorry I though you are referring to the other issue I posted, for this one I used:

-keep class com.mbientlab.** { *; }

in proguard.cfg

from metawear-sdk-android.

I had to use:

buildTypes {
        release {
            minifyEnabled false
        }
    }

to avoid proguard remove needed class.

trying petrnalevka solution and see what happen.

Thanks.

from metawear-sdk-android.