Send multiple values between two activities-CodePudding

Hi I´m just starting to learn how to use Android Studio. And I want to try to send the values of the choices the user makes from one activity to the other.

So when the user chooses their "mackor" = sandwiches, I want it to show up in a textview (kvittoView) where it shows all the "mackor" they have chosen (clicked on).

Right now with the code I have made so far I can only display 1 "mackor" at a time.

This all happens between activity 2 and 3.

Activity 2:

package com.example.studentcafe;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import java.util.ArrayList;

public class SecondActivity extends AppCompatActivity {
   
    String[] mackor_names = {
        "Tonfisk Macka 30:-",
        "Skagen Macka 35:-",
        "Kyckling Macka 35:-",
        "Curryröra Macka 30:-",
        "Ost o Kalkon Macka 25:-",
        "Köttbulle Macka 25:-",
        "Falafel Macka 20:-"
    };
    
    ListView lv1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);

        ArrayAdapter<String> mackor_names_adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mackor_names);

        lv1 = (ListView) findViewById(R.id.list_options);
        lv1.setAdapter(mackor_names_adapter);
        lv1.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                String item_name = mackor_names_adapter.getItem(i);
                Toast.makeText(SecondActivity.this, "Du har valt "   item_name, Toast.LENGTH_SHORT).show();
                String TempListViewClickedValue = mackor_names[i];
                Intent intent = new Intent(SecondActivity.this, ThirdActivity.class);
                intent.putExtra("ListViewClickedValue", TempListViewClickedValue);
                startActivity(intent);
            }
        });
    }
  
    public void tillbaka(View view) {
        Intent intent = new Intent(this, MainActivity.class);
        startActivity(intent);
    }

    public void gavidare(View view) {
        Intent intent = new Intent(this, ThirdActivity.class);
        startActivity(intent);
    }
}

Activity 3

package com.example.studentcafe;

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import android.widget.TextView;
import java.util.ArrayList;

public class ThirdActivity extends AppCompatActivity {

    TextView editText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_third);
        editText = (TextView) findViewById(R.id.kvittoView);
        String TempHolder = getIntent().getStringExtra("ListViewClickedValue");
        editText.setText(TempHolder);
    }

    public void tillbaka2(View view) {
        Intent intent = new Intent(this, SecondActivity.class);
        startActivity(intent);
    }

    public void bestall(View view) {
        Intent intent = new Intent(this, FourthActivity.class);
        startActivity(intent);
    }
}

CodePudding user response：

You can pass data like this(this is from SecondActivity):

Intent intent = new Intent(this, ThirdActivity.class);
intent.putExtra("EXTRA_SESSION_ID", sessionId);
startActivity(intent);

and than in ThirdActivity in onCreate method:

String sessionId = getIntent().getStringExtra("EXTRA_SESSION_ID");

Also, best practise is to have key "EXTRA_SESSION_ID" stored in public static variable so you have only one object

CodePudding user response：

1.Change this to arraylist

 String[] mackor_names = {
            "Tonfisk Macka 30:-",
            "Skagen Macka 35:-",
            "Kyckling Macka 35:-",
            "Curryröra Macka 30:-",
            "Ost o Kalkon Macka 25:-",
            "Köttbulle Macka 25:-",
            "Falafel Macka 20:-"
        };






  ArrayList<String> list = new ArrayList<>();
    list.add("Tonfisk Macka 30:-");
    list.add("Skagen Macka 35:-"); ......

2.and then use

intent.putStringArrayListExtra("test",list);

3.and to get values

Intent intent=getIntent();
ArrayList<String> test = intent.getStringArrayListExtra("test");

CodePudding user response：

//Create the bundle
Bundle bundle = new Bundle();
//Add your data from getFactualResults method to bundle
bundle.putString("VENUE_NAME", venueName);  
//Add the bundle to the intent
i.putExtras(bundle);

Insead of array you can use bundle