Question

I have certain data in the data model class and want to share this data/object to the other activity. Single Instance could be a good choice but want to finish my previous activity and hence will got null pointer. Please Suggest the best possible way to do it?

Answer 1

Best possible way to use serialization, SingleInstance will not work here because you have to finish your activity.

Intent intent = new Intent(this, B.class);
ArrayList<String> data = new ArrayList<String>();
arrays.add("testing");
intent.putExtra("arrayList", data);
startActivity(intent);

you can use your objects instead of String and other side you can retrieve using this.

ArrayList<String> arrayList =(ArrayList<String>) getIntent().getSerializableExtra("arrayList");