Where can I view log of LOG(INFO) ?

[Hưng Vũ]

Hello everyone !

I am working with HAL and trying to view log from HAL layer. Almost of code of HAL uses ```android-base/logging.h``` header and prints log with ```LOG(INFO)``` function. Even though checking both ```dmesg``` and ```logcat```. I can find out where to view these logs.

Can anyone help me ?

Thank All !

Best Regard !

[kiran kadam]

Hi Hung,

check if macro #define LOG_NDEBUG 0 is commented in HAL files. you can use ALOGE to print logs and logs can be seen in logcat.

Thanks,

Kiran

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Regards,

Kiran Kadam

[Hưng Vũ]

Thanks for your help ! I have tried it, but neither #define LOG_NDEBUG 0 and ALOGE didn't print logs.  Exclusively, when i used LOG(FATAL), it have an effect.

Vào 02:22:29 UTC+7 Thứ Ba, ngày 21 tháng 4 năm 2020, kiran kadam đã viết:

Hi Hung,

check if macro #define LOG_NDEBUG 0 is commented in HAL files. you can use ALOGE to print logs and logs can be seen in logcat.

Thanks,

Kiran

On Mon, Apr 20, 2020 at 9:26 PM Hưng Vũ <hungvu...@gmail.com> wrote:

Hello everyone !

I am working with HAL and trying to view log from HAL layer. Almost of code of HAL uses ```android-base/logging.h``` header and prints log with ```LOG(INFO)``` function. Even though checking both ```dmesg``` and ```logcat```. I can find out where to view these logs.

Can anyone help me ?

Thank All !

Best Regard !

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Regards,

Kiran Kadam

[Tommaso Merciai]

Hi Hung,

Have you try to ask to logcat to be verbose as possible, try to use the following command:

$ logcat -b all -v time *:V

Regards,

Tommaso

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[kiran kadam]

Hi Hung,

Can you provide more details like file name ,android version etc 

Thanks 

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[Hưng Vũ]

Thank Tommaso,

I'm working with the other types of log such as error , info,... they're on higher level of verbose 

Regards,

Hung

Vào 00:13:13 UTC+7 Thứ Tư, ngày 22 tháng 4 năm 2020, Tommaso Merciai đã viết:

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[Hưng Vũ]

It's a service.cpp file written by me:

```

#define LOG_TAG "android.hard...@2.0-service"

#include <hidl/HidlSupport.h>

#include <hidl/HidlTransportSupport.h>

#include <android-base/logging.h>

#include <android/hardware/hvuleds/2.0/IHvuleds.h>

#include "Hvuleds.h"

#include <utils/Log.h>

#define LOG_NDEBUG 0

...

int main() {

ALOGE("hungvu: Hvuleds start HAL");

LOG(ERROR) << "hungvu: Hvuleds start HAL";

...

}

```

Definitely, This service is initialized in init process and perform well on my device. But, I don't know why it doesn't print log on logcat or dmesg. Only LOG(FATAL) has an effect and abort my service.

Vào 04:54:12 UTC+7 Thứ Tư, ngày 22 tháng 4 năm 2020, kiran kadam đã viết:

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