Question posted in 
I want to return the data from second activity to first activity using intent when click the OnAddClicked button in second activity, but what I done was not working. The data that I return to first activity is null and I have no idea about this. Can anyone help me to solve this problem?
First Activity:
public class CartView extends AppCompatActivity {
ActivityCartViewBinding binding;
public CartView.MyClickHandler handler;
GridView view_listView;
String Default_curr;
String itemgroup;
String itemtype;
String uprice;
String quantity;
ACDatabase db;
List<AC_Class.Item> s_item = new ArrayList<>();
AC_Class.InvoiceDetails invoiceDetails;
AC_Class.Item item;
String substring = "";
EditText searchEditText;
Button All;
Button Type;
Button Group;
ArrayAdapter<String> adapter;
int i = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
binding = DataBindingUtil.setContentView(this, R.layout.activity_cart_view);
// Action Bar
ActionBar actionBar = getSupportActionBar();
actionBar.setTitle("Catalog");
actionBar.setDisplayHomeAsUpEnabled(true);
searchEditText = (EditText) findViewById(R.id.searchField);
UIUtil.hideKeyboard(this);
UIUtil.showKeyboard(this, searchEditText);
db = new ACDatabase(this);
invoiceDetails = new AC_Class.InvoiceDetails();
item = new AC_Class.Item();
handler = new MyClickHandler(this);
binding.setHandler(handler);
All = (Button) findViewById(R.id.button1);
Type = (Button) findViewById(R.id.button2);
Group = (Button) findViewById(R.id.button3);
view_listView = (GridView) findViewById(R.id.GridView);
All.setVisibility(View.GONE);
Type.setVisibility(View.GONE);
Group.setVisibility(View.GONE);
getData("");
searchEditText.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {}
@Override
public void afterTextChanged(Editable s) {
getData(s.toString().trim());
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.ctlg_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
/*if (id == android.R.id.home)
{
onBackPressed();
return true;
}*/
if (id == R.id.cart)
{
Intent new_intent = new Intent(CartView.this, CartList.class);
new_intent.putExtra("invoiceDetail", invoiceDetails);
startActivityForResult(new_intent,3);
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onResume() {
super.onResume();
getData("");
}
public void getData(String substring) {
Cursor data = db.getItemLike(substring, 0);
if (data.getCount() > 0){
s_item.clear();
while (data.moveToNext()) {
try {
AC_Class.Item item = new AC_Class.Item(data.getString(0), data.getString(1), data.getString(2), data.getString(3), data.getString(4), data.getString(5), data.getString(6), data.getString(7), data.getString(8), data.getFloat(9), data.getFloat(10), data.getFloat(11), data.getFloat(12), data.getFloat(13), data.getFloat(14), data.getString(15), data.getString(16), data.getFloat(17), data.getString(18),data.getFloat(19),data.getFloat(20));
s_item.add(item);
} catch (Exception e) { Log.i("custDebug", "error reading image: "+e.getMessage()); }
}
CartViewListAdapter arrayAdapter = new CartViewListAdapter(this, s_item);
view_listView.setAdapter(arrayAdapter);
Cursor dcurren = db.getReg("6");
if(dcurren.moveToFirst()){
Default_curr = dcurren.getString(0);
}
view_listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String itemcode = ((AC_Class.Item)parent.getItemAtPosition(position)).getItemCode();
String uom = ((AC_Class.Item)parent.getItemAtPosition(position)).getUOM();
AC_Class.Item sa =((AC_Class.Item) parent.getItemAtPosition(position));
//Intent item_intent = new Intent();
Intent item_intent = new Intent(CartView.this, ItemDetail.class);
item_intent.putExtra("ItemKey",itemcode);
item_intent.putExtra("ItemUOMKey",uom);
item_intent.putExtra("Items",sa);
//setResult(4, item_intent);
startActivity(item_intent);
//finish();
}
});
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 1:
if (resultCode == 1) {
itemtype = data.getStringExtra("TypeKey");
if (itemtype != null) {
getTypedata();
}
}
break;
case 2:
if (resultCode == 1) {
itemgroup = data.getStringExtra("GroupKey");
if(itemgroup != null){
getGroupdata();
}
}
break;
case 3:
if (resultCode == 1) {
AC_Class.Item i = data.getParcelableExtra("Item");
uprice = data.getStringExtra("Price");
quantity = data.getStringExtra("Quantity");
if (i != null) {
invoiceDetails.setItemCode(i.getItemCode());
invoiceDetails.setItemDescription(i.getDescription());
invoiceDetails.setUPrice(Double.valueOf(i.getPrice()));
invoiceDetails.setUOM(i.getUOM());
//invoiceDetails.setUPrice(Double.valueOf(uprice));
invoiceDetails.setQuantity(Double.valueOf(quantity));
}
}
break;
}
}
}
SecondActivity:
public class ItemDetail extends AppCompatActivity {
ActivityItemDetailBinding binding;
AC_Class.Item items;
AC_Class.ItemUOM itemuom;
AC_Class.Cart cart;
AC_Class.InvoiceDetails invoiceDetails;
ACDatabase db;
String Item;
String ItemUOM;
String Default_curr;
Intent pintent;
EditText etQty;
String default_loc;
List<AC_Class.Item> c_item = new ArrayList<>();
MyClickHandler handler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
binding = DataBindingUtil.setContentView(this, R.layout.activity_item_detail);
itemuom = new AC_Class.ItemUOM();
items = new AC_Class.Item();
invoiceDetails = new AC_Class.InvoiceDetails();
cart = new AC_Class.Cart();
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
db = new ACDatabase(this);
pintent = getIntent();
//substring = pintent.getStringExtra("substring");
Item = pintent.getStringExtra("ItemKey");
ItemUOM = pintent.getStringExtra("ItemUOMKey");
handler = new MyClickHandler(this);
binding.setHandler(handler);
Cursor loc = db.getReg("7");
if(loc.moveToFirst()){
default_loc = loc.getString(0);
}
items = pintent.getParcelableExtra("Items");
binding.setItem(items);
binding.setInvoicedetail(invoiceDetails);
binding.quantity.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
etQty = (EditText)findViewById(R.id.quantity);
String qty = etQty.getText().toString();
if(qty.length() > 0)
{
invoiceDetails.setQuantity(Double.valueOf(qty));
//Calculation();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home: {
onBackPressed();
return true;
}
}
return super.onOptionsItemSelected(item);
}
public class MyClickHandler {
Context context;
public MyClickHandler(Context context) {
this.context = context;
}
public void OnAddClicked(View view) {
//Intent new_intent = new Intent(context, CartList.class);
Intent new_intent = new Intent(context,CartView.class);
new_intent.putExtra("Item", items);
new_intent.putExtra("Quantity",invoiceDetails.getQuantity());
new_intent.putExtra("Price",invoiceDetails.getUPrice());
setResult(1, new_intent);
finish();
}
}
}
2
Answers
OnAddClicked your are finishing the activity when it goes to next activity previous activity goes to end….so remove the finish();
First thing first, to get result from other activity, you need to Use startActivityForResult method instead of startActivity.
and for setting result
and to receive result use below code.