Why Log.d and Log.v do not print any output?

Question

Want to Log something with Log.d, but no output text is appearing in the Android Monitor section. Code is like below?

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);


    insertToDb();
}

private void insertToDb() {
 Log.d("TAG", "Rows count: ");

    }

After restarting nothing changed also:

Maybe you are filtering for error or warning? or maybe you are not selecting correct app on adb debugging part. — Neonamu, Dec 12 '16 at 08:13
I am sure filtering is right, when I use system.out.println, output is there in console, but no result for Log.d in Android monitor tab — Davoud, Dec 12 '16 at 08:17
for *log.d* to show you should set the filtering on verbose or debug — SepJaPro2.4, Dec 12 '16 at 08:21
sometimes android monitor acts strange and wont show anything try restarting android studio and see how it goes — SepJaPro2.4, Dec 12 '16 at 08:24
I know how filtering works, let me restart the PC, until then you guys continue giving me minus sign. — Davoud, Dec 12 '16 at 08:24

score 10 · Accepted Answer · edited Nov 13 '18 at 02:00

10

This might help
Huawei, logcat not showing the log for my app?

Dial
*#*#2846579#*#*
and you will see a hidden menu. Go to the Project Menu > Background Setting > Log setting and define the log availability (log switch) and level (log level setting).

You might have to enable both AP and CP logs for debug and verbose logs to show.

PS : probably only for Huawei devices.

edited Nov 13 '18 at 02:00

Pang

9,564
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answered Dec 12 '16 at 11:03

uptoNoGood

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you made my day this make me crazy i thought this is android studio bug – Poison Sniper Apr 15 '17 at 11:28
What about tablets which does not have Dial app? thanks – Mr T May 12 '17 at 01:55
Usually there's a corresponding string which can be tried on calculator. I don't know what it is though – uptoNoGood May 12 '17 at 18:06

Mushirih · Answer 2 · 2016-12-12T08:21:24.247

1

Use

Log.e("TAG", "Rows count: ");

For the log to be in red (error) for better visibility.Remember to clear the search bar of the logs pane to display all logs too

edited Dec 12 '16 at 08:21

answered Dec 12 '16 at 08:20

Mushirih

451
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add exception to `Log.e(...);` – rupinderjeet Dec 12 '16 at 08:20

score 0 · Answer 3 · answered Dec 12 '16 at 08:17

0

It is working. i had tried. but if it is not working in your android studio then check you had selected your device properly or else try to restart the android studio.

answered Dec 12 '16 at 08:17

VNS

44
8

score 0 · Answer 4 · answered Dec 12 '16 at 08:19

0

Its working fine... you need to check log under Debug section as you have used Log.d.

answered Dec 12 '16 at 08:19

Dhanveer thakur

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score 0 · Answer 5 · answered May 26 '20 at 09:21

0

I had this problem as well. At first, I was importing Log using this:

import com.example.android.common.logger.Log;

When I imported Log using this:

import android.util.Log;

the output appeared.

answered May 26 '20 at 09:21

Suzan AK

1
3

Why Log.d and Log.v do not print any output?

5 Answers5