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androidandroid-intentonactivityresult

Android : When do we use getIntent()?

I dont' understand why we use method getIntent().

Because, when we need that method, We can use method onActivityResult().

But by using the method getIntent(), it could cause NullPointerException.

Solution

  • http://developer.android.com/reference/android/app/Activity.html#getIntent()

    Return the intent that started this activity.

    If you start an Activity with some data, for example by doing

    Intent intent = new Intent(context, SomeActivity.class);
intent.putExtra("someKey", someData);

    you can retrieve this data using getIntent in the new activity:

    Intent intent = getIntent();
intent.getExtra("someKey") ...

    So, it's not for handling returning data from an Activity, like onActivityResult, but it's for passing data to a new Activity.