How does the HomeAsUp button of Toolbar in Android adjust the margin?

HomeAsUp

here are two codes to set up HomeAsUp:

    if (actionBar != null) {
            actionBar.setDisplayHomeAsUpEnabled(true);
            actionBar.setHomeAsUpIndicator(R.drawable.ic_menu);
        }
Please forgive me for the incorrect format when I sent the question for the first time.

Jul.06,2022
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e631a2-44d56.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e631a2-44d56.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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