Get Result From Other Activity - Android Studio - Compose

How To Get Result From Another Activity Using the registerForActivityResult?

In this tutorial, we will learn how to retrieve results from another activity using registerForActivityResult. You may be aware of using the method startActivityForResult, which is now deprecated. So we will use the newer way, which is registerForActivityResult.

We will create 2 Activities: the MainActivity and the FormActivity. From the MainActivity, we will launch the FormActivity to input some data and get that data back as a result to the MainActivity.

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Code:

MainActivity.kt

package com.technifysoft.myapplication

import android.app.Activity
import android.content.Intent
import android.os.Bundle
import android.widget.Toast
import androidx.activity.ComponentActivity
import androidx.activity.compose.rememberLauncherForActivityResult
import androidx.activity.compose.setContent
import androidx.activity.result.contract.ActivityResultContracts
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Button
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.technifysoft.myapplication.ui.theme.MyApplicationTheme


/**
 * MainActivityCompose is the main activity of the application, responsible for setting up the UI.
 */
class MainActivityCompose : ComponentActivity() {

    /**
     * Called when the activity is first created. This is where you should do all of your normal static set up:
     * create views, bind data to lists, etc. This method also provides you with a Bundle containing the activity's
     * previously frozen state, if there was one.
     */
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            MyApplicationTheme {

                Scaffold(
                    modifier = Modifier.fillMaxSize(),
                ) { innerPadding ->
                    MainUi(innerPadding)
                }

            }
        }
    }
}

@Composable
fun MainUi(innerPadding: PaddingValues) {
    val TAG = "PERMISSIONS_TAG"
    val context = LocalContext.current

    var name by remember { mutableStateOf("") }
    var email by remember { mutableStateOf("") }

    // launcher for FormActivity
    val launcher = rememberLauncherForActivityResult(
        contract = ActivityResultContracts.StartActivityForResult()
    ) { result ->
        if (result.resultCode == Activity.RESULT_OK) {
            val data = result.data
            name = data?.getStringExtra("name") ?: ""
            email = data?.getStringExtra("email") ?: ""
            Toast.makeText(context, "$name\n$email", Toast.LENGTH_SHORT).show()
        } else {
            Toast.makeText(context, "Cancelled...", Toast.LENGTH_SHORT).show()
        }
    }

    // UI
    Column(
        modifier = Modifier
            .fillMaxSize()
            .padding(20.dp),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.Center
    ) {
        Button(onClick = {
            val intent = Intent(context, FormActivity::class.java)
            launcher.launch(intent)
        }) {
            Text("Add User")
        }

        Spacer(modifier = Modifier.height(20.dp))

        Text(text = name, style = MaterialTheme.typography.titleMedium)
        Text(text = email, style = MaterialTheme.typography.titleMedium)
    }

}

/**
 * GreetingPreview is a composable function for previewing the MainUI in Android Studio.
 * It is annotated with @Preview to enable live preview.
 *
 */
@Preview(showBackground = true)
@Composable
fun GreetingPreview() {
    MyApplicationTheme {
        MainUi(PaddingValues())
    }
}

FormActivity.kt

package com.technifysoft.myapplication

import android.app.Activity
import android.content.Intent
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.LocalActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Button
import androidx.compose.material3.OutlinedTextField
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.technifysoft.myapplication.ui.theme.MyApplicationTheme

class FormActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {
            MyApplicationTheme {
                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
                    FormUI(
                        modifier = Modifier.padding(innerPadding)
                    )
                }
            }
        }
    }
}

@Composable
fun FormUI(modifier: Modifier = Modifier) {
    val activity = LocalActivity.current as Activity

    var name by remember { mutableStateOf("") }
    var email by remember { mutableStateOf("") }

    Column(
        modifier = Modifier
            .fillMaxSize()
            .padding(20.dp),
        verticalArrangement = Arrangement.Center
    ) {
        OutlinedTextField(
            value = name,
            onValueChange = { name = it },
            label = { Text("Name") },
            modifier = Modifier.fillMaxWidth()
        )

        Spacer(modifier = Modifier.height(10.dp))

        OutlinedTextField(
            value = email,
            onValueChange = { email = it },
            label = { Text("Email") },
            modifier = Modifier.fillMaxWidth()
        )

        Spacer(modifier = Modifier.height(20.dp))

        Button(
            onClick = {
                val resultIntent = Intent().apply {
                    putExtra("name", name)
                    putExtra("email", email)
                }
                activity.setResult(Activity.RESULT_OK, resultIntent)
                activity.finish()
            },
            modifier = Modifier.align(Alignment.CenterHorizontally)
        ) {
            Text("Submit")
        }
    }
}

@Preview(showBackground = true)
@Composable
fun GreetingPreview2() {
    MyApplicationTheme {
        FormUI(modifier = Modifier.fillMaxSize())
    }
}

Screenshots:

Get Result From Other Activity - Android Studio - Compose