Crash when performing savedInstanceState.containsKey()

Question

I get a crash when I use this code:

if (!savedInstanceState.containsKey("mybool")) {
    //  my code
}

My onCreate():

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);}

Elsewhere in my code:

savedInstanceState.putBoolean("mybool", true);

@PhanDinhThai please redo the code it's simple, I don't have a PC with me at the moment. — Jonathan Doe, Jul 21 '17 at 09:20

score 1 · Accepted Answer · answered Jul 21 '17 at 09:20

savedInstanceState will be null first time activity launches.

savedInstanceState will not be null after activity is recreated (e.g. as a result of configuration change, system kill the process of your app).

@Override
protected void onCreate(Bundle savedInstanceState) {
    if (null == savedInstanceState) {
        // activity is being launched first time
    } else {
        // is called after configuration change or framework restore your app
    }
}

ill try that and let you know – Jonathan Doe Jul 21 '17 at 09:24 — Jonathan Doe, Jul 21 '17 at 09:24

Crash when performing savedInstanceState.containsKey()

1 Answers1