4. Fetching Data from One Activity to Second Activity

 

1. Manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/Theme.ActivityHandle"
        tools:targetApi="31">
        <activity
            android:name=".SecondActivity"
            android:exported="false" />
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

2. Xml

i. First Activity:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="bottom|end"
    tools:context=".SecondActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Next"
        android:layout_marginRight="21dp"
        android:layout_marginBottom="11dp"
        android:id="@+id/btnNext"
        />

</LinearLayout>

ii. Second Activity:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:background="#03A9F4"
    tools:context=".SecondActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Name"
        android:id="@+id/txtStudenInfo"
        android:textSize="32sp"
        android:textStyle="bold"
        android:textColor="#fff"/>
</LinearLayout>

3. Java

i. First Activity:

package com.example.activityhandle;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

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

        btnNext = findViewById(R.id.btnNext);
        Intent iNext;
        iNext = new Intent(MainActivity.this, SecondActivity.class);
        //for fetching data from one to second activity
        iNext.putExtra("title", "Home");
        iNext.putExtra("StudentName", "Raman");
        iNext.putExtra("Roll No", 10);

        btnNext.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                btnNext.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        startActivity(iNext);
                    }
                });
            }
        });
    }
}

ii. Second Activity:

package com.example.activityhandle;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

import java.lang.String;

public class SecondActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        Intent fromAct = getIntent();
        String title = fromAct.getStringExtra("title");
        String StudentName = fromAct.getStringExtra("StudentName");
        int RollNo = fromAct.getIntExtra("Roll No", 0);

        TextView txtStudentInfo;

        txtStudentInfo = findViewById(R.id.txtStudenInfo);
        txtStudentInfo.setText("Roll No: "+RollNo+", Name: "+StudentName);

        getSupportActionBar().setTitle(title);
    }
}