There's a lot of questions about this already, and I feel like my code should work. What I'm trying to do is Activity A starts Activity B, sending an intent. Activity B then starts Activity A for result, and a new Intent should be received. My code is below, and according to the quote from the documentation below, the code should be working:
The "standard" and "singleTop" modes differ from each other in just one >respect: Every time there's new intent for a "standard" activity, a new >instance of the class is created to respond to that intent. Each instance >handles a single intent. Similarly, a new instance of a "singleTop" activity >may also be created to handle a new intent. However, if the target task >already has an existing instance of the activity at the top of its stack, >that instance will receive the new intent (in an onNewIntent() call); a new >instance is not created.
So based on that, my code is as follows: P.S My onNewIntent(Intent) doesn't get called, Im wondering if i put it in the right class.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_drink_sale_list);
mListView = (ListView) findViewById(R.id.list);
mDrinksAdapter = new drinksAdapter(getApplicationContext(), drinks, drinkPics);
mListView.setAdapter(mDrinksAdapter);
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//If the bn!= null, this means that this activity was started by Activity B via startActivityForResult()
Bundle bn = getIntent().getExtras();
if(bn != null){
Intent intent = new Intent();
Bundle bundle = new Bundle();
bundle.putSerializable("anotherDrinkObject", drinks.get(position));
intent.putExtras(bundle);
intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
setResult(RESULT_OK, intent);
finish();
}
else {
Intent intent = new Intent(drinkSaleList.this, SaleActivity.class);
Bundle bundle = new Bundle();
bundle.putSerializable("DrinkObject", drinks.get(position));
intent.putExtras(bundle);
startActivity(intent);
}
}
});
}
}
Activity B
public class SaleActivity extends AppCompatActivity {
private ListView mListView;
private drinksAdapter mDrinksAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_sale);
setContentView(R.layout.activity_sale);
Bundle bundle = getIntent().getExtras();
Drink drink = (Drink) bundle.getSerializable("DrinkObject");
mListView = (ListView) findViewById(R.id.saleList);
mDrinksAdapter = new drinksAdapter(getApplicationContext(), drink);
mListView.setAdapter(mDrinksAdapter);
Button addDrink = (Button) findViewById(R.id.addAnotherDrink);
addDrink.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(SaleActivity.this, drinkSaleList.class);
intent.removeExtra("DrinkObject");
intent.putExtra("anotherDrink", true);
startActivityForResult(intent, 1);
}
});
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
setIntent(intent);//must store the new intent unless getIntent() will return the old one
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
if (resultCode == RESULT_OK) {
Bundle bn = getIntent().getExtras();
Drink drink = (Drink) bn.getSerializable("anotherDrinkObject");
mDrinksAdapter.add(drink);
}
}
}
}
