Full source code to Open a New Activity and Pass Variables to It
Activity2.java
package com.example.application.exampleapp;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class Activity2 extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_2);
Intent intent = getIntent();
String text = intent.getStringExtra(MainActivity.EXTRA_TEXT);
int number = intent.getIntExtra(MainActivity.EXTRA_NUMBER, 0);
TextView textView1 = (TextView) findViewById(R.id.textview1);
TextView textView2 = (TextView) findViewById(R.id.textview2);
textView1.setText(text);
textView2.setText("" + number);
}
}
activity_2.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context="com.example.application.exampleapp.Activity2">
<TextView
android:id="@+id/textview1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp" />
<TextView
android:id="@+id/textview2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/textview1"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="Activity 2"
android:textSize="30sp" />
</RelativeLayout>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context="com.example.application.exampleapp.MainActivity">
<EditText
android:id="@+id/edittext1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp" />
<EditText
android:id="@+id/edittext2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/edittext1"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:inputType="number" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="Activity 1"
android:textSize="30sp" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView3"
android:layout_centerHorizontal="true"
android:text="open activity 2" />
</RelativeLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.application.exampleapp">
<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=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Activity2"
android:parentActivityName=".MainActivity"></activity>
</application>
</manifest>
MainActivity.java
package com.example.application.exampleapp;
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 {
public static final String EXTRA_TEXT = "com.example.application.example.EXTRA_TEXT";
public static final String EXTRA_NUMBER = "com.example.application.example.EXTRA_NUMBER";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
openActivity2();
}
});
}
public void openActivity2() {
EditText editText1 = (EditText) findViewById(R.id.edittext1);
String text = editText1.getText().toString();
EditText editText2 = (EditText) findViewById(R.id.edittext2);
int number = Integer.parseInt(editText2.getText().toString());
Intent intent = new Intent(this, Activity2.class);
intent.putExtra(EXTRA_TEXT, text);
intent.putExtra(EXTRA_NUMBER, number);
startActivity(intent);
}
}