How to store Android Log entry as a string

Question

I can't seem to find an answer or a question regarding this:

How do I store an Android Log entry to a string:

Log.i(TAG, "onCreate: start: ");

String s = /* get last Log entry */.toString();

The reason for this is so I can have the process ID and thread IDs. When I try to manual store the process and thread IDs, the thread IDs are different than printed in Logcat:

Log.i(TAG, "#checkWifiConnection: start");
String s = Integer.toString(android.os.Process.myPid()) + " " + Integer.toString(android.os.Process.getThreadPriority(android.os.Process.myTid())) + " " + TAG;
System.out.println(s + "#checkWifiConnection: start");

Logcat shows:

01-09 18:38:02.994 1558-2021 I/*~FETCH DATA: #checkWifiConnection: start

System.out shows:

I/System.out: 1558 10 *~FETCH DATA#checkWifiConnection: start

I don't think the Log class should work as a cache system to do what you want. You can save whatever you need in other ways. — Pedro Fernandes, Jan 09 '19 at 20:06
you can read the android log with adb like `adb shell logcat` but it's an output firehose. What do you want to accomplish? — nandsito, Jan 09 '19 at 20:36

Skizo-ozᴉʞS ツ · Accepted Answer · 2019-01-09T20:51:25.610

2

How do I store an Android Log entry to a string

You can not do this.

From Log documentation

Generally, you should use the Log.v(), Log.d(), Log.i(), Log.w(), and Log.e() methods to write logs. You can then view the logs in logcat.

They are only for Logcat in debug section, so I recommend you to look for another way to store your desire.

For instance you could create a class, that stores all of the Log you have, and then store it wherever you want.

I already know how to store some information into a seperate class but the reason I wanted Log.toString was for the time stamps, process IDs, and thread IDs

Then create more attributes for this specific class and pass them whenever you want.

To store the Process id use

int pid = android.os.Process.myPid();

To store the Thread id use

int tid = android.os.Process.getThreadPriority(android.os.Process.myTid());

To store the timestamp use

SimpleDateFormat s = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss");
String format = s.format(new Date());

edited Jan 09 '19 at 20:51

answered Jan 09 '19 at 20:20

Skizo-ozᴉʞS ツ

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I already know how to store some information into a seperate class but the reason I wanted Log.toString was for the time stamps, process IDs, and thread IDs – Samuel Jan 09 '19 at 20:30
Then create a class that have these params and send it – Skizo-ozᴉʞS ツ Jan 09 '19 at 20:44
This does not report the correct thread ID. At least it's not the same as the logcat. – Samuel Jan 09 '19 at 22:45
I've tested it and it's the same number, could you provide your code to see why is not the same for you? – Skizo-ozᴉʞS ツ Jan 09 '19 at 23:53
Can you try this `Process.myTid()` instead? – Skizo-ozᴉʞS ツ Jan 10 '19 at 07:32

score 0 · Answer 2 · answered Jan 09 '19 at 20:15

0

I dont think its possible to do that however you could make your own object which handles log calls and sets a string instance variable to the last message. You can then retrieve this string from the object

answered Jan 09 '19 at 20:15

Adam

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How to store Android Log entry as a string

2 Answers2