CODEWITHSUNDEEP
androidloggingoutput
donparalias
donparalias

Reputation: 1834

How do i output a log in Android?

I have seen like a million different log functions , like log.i , log.v , log.d .

I just want to output a simple string on the log some times in my code to see if everything is working ok for debugging.

What is the clean way to do that?

Upvotes: 1

Views: 243

Answers (6)

Chulbul Pandey
Chulbul Pandey

Reputation: 506

@donparalias great question

The Most easiest way:

 public static final String LOG_TAG = "Facebook";


 public void onFacebookError(FacebookError error) 
{
    Log.i(Facebook.LOG_TAG, "LoginListener onFacebookError " + error);

}

You can use one or all of these:

Log.d("tag","string");  ::  Debug

Log.v("tag","string");  ::  Verbose

Log.e("tag","string");  ::  Error

Log.i("tag","string");  ::  Info

Upvotes: 2

Emil Adz
Emil Adz

Reputation: 41129

When you change the letters after log. you are basically setting the severity of this log record:

I => Info
V => Verbose
D => Debug
E => Error

Take a look at this picture for all the different kinds of log records:

enter image description here

So use .d for simple debugging records like this:

Log.d (TAG, "the message you want to out put");

While I always set the TAG at the begging of the class like this:

static final String TAG = YouCurrentActivity.class.getSimpleName();

Upvotes: 2

Gurpreets11
Gurpreets11

Reputation: 2351

there are different type of log.

I = Info

V = Verbose

D = Debug

E = Error

Example:

Log.d("tag","the string youd like");

Log.v("tag","the string youd like");

Log.e("tag","the string youd like");

Log.i("tag","the string youd like");

Upvotes: 1

Qadir Hussain
Qadir Hussain

Reputation: 8856

example

String TAG = "value of i = ";

for(int i = 0; i<=10 i++)
{
  Log.i(TAG, i+"");
}

this will print the 10 numbers in your log.i (info).

enter image description here

log.d

is for debug

log.e

is for error

and so on. here is a link to study more about log

Upvotes: 3

JRowan
JRowan

Reputation: 7114

Log.d("tag","the string youd like");

log.d is for the debug list of LogCat

Upvotes: 2

Shail Adi
Shail Adi

Reputation: 1510

You can use Log to track the logs in your application code.

Log API is for sending log output.

Generally, use the Log.v() Log.d() Log.i() Log.w() and Log.e() methods.

The order in terms of verbosity(wordiness), from least to most is ERROR, WARN, INFO, DEBUG, VERBOSE. Otherwise more or less they are same.

Verbose should never be compiled into an application except during development.

Debug logs are compiled in but stripped at runtime.

Error, warning and info logs are always kept.

Upvotes: 5

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