OnDestroy() is being called after onCreate() when I start Activity

Issue

I am updating the local database in onDestroy() of activity A. Activity B is depends on the local DB which is updated in onDestroy() of activity A.

My problem is that whenever I start Activity B and finish Activity A onDestroy() of activity A is being called after onCreate() of Activity B. Due to this issue I am losing the data stored after destroying Activity A.

How do I fix this issue?

Activity A

@Override
protected void onCreate(Bundle savedInstanceState){

    //After retrieving User data
    //inside onclicklistener
    someButton.setOnClickLister( new View.OnClickListener() {
        public void onClick(View view) {
              finish();
              startActivity(this,FamilyInfoActivity.class);
        }
    }
}

@Override
protected void onDestroy(){
    localJson.setStatus(status);
    localDBUtil.setLocalJson(this,localJson,connectionId);
    super.OnDestroy();
}

Activity B

 @Override
protected void onCreate(Bundle savedInstanceState){

    localJson = localDBUtil.getLocalJson(this,connectionId);
    
}

Solution

You cannot rely on the timing of onDestroy() to save your changes. You should save changes in onPause() which is the only lifecycle method that is guaranteed to be called.

Also, if you want to pass data from ActivityA to ActivityB, you can use one of the following methods:

• Store data in a file
• Store data in an SQLite database
• Store data in SharedPreferences
• Put the data in "extras" in the Intent you use to launch ActivityB (only if the amount of data is not too large)

Answered By - David Wasser