how to pass string one activity to another in android studio

how to pass string one activity to another in android studio


In this Tutorial, today learn how to pass string one activity to another in an android studio. there are sending and retrieve String to the intent data.

Sending String:

Intent intent = new Intent(getApplicationContext(), Second_Activity.class);
                intent.putExtra("message", str);

                startActivity(intent);

Retrieve String:

 Intent intent = getIntent();
        String str = intent.getStringExtra("message");
        text.setText(str);

There is two methods on this Activity so let's start a code:

1.MainActivity.java:

package com.akash.passstring;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
    EditText textBox;
    Button passButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textBox = (EditText)findViewById(R.id.textBox);
        passButton = (Button)findViewById(R.id.passButton);

        passButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String str = textBox.getText().toString();

                Intent intent = new Intent(getApplicationContext(), Second_Activity.class);
                intent.putExtra("message", str);

                startActivity(intent);
            }
        });
    }
}

2.activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="15dp"
    tools:context="com.androidexample.First"
    android:orientation="vertical">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textBox"
        android:hint="Enter Your Message"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/passButton"
        android:text="Pass"/>
</LinearLayout>

3.Second_Activity.java:

package com.akash.passstring;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;


public class Second_Activity extends AppCompatActivity {
    TextView text;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second_);
        text = (TextView)findViewById(R.id.text);

        Intent intent = getIntent();
        String str = intent.getStringExtra("message");
        text.setText(str);
    }
}

4.activity_second_.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:padding="15dp">

    <TextView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text=""

        android:id="@+id/text"/>

</LinearLayout>

5.AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.akash.passstring">

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:roundIcon="@mipmap/ic_launcher_round"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".Second_Activity"></activity>

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

6.Output: