jemboot

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.latihan8">

    <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=".SecondActivity"
            android:label="Second Activity"
            android:parentActivityName=".MainActivity"> // manggil panah back ci atas ujung kiri

        </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>


=================main

<?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=".MainActivity">

    <Button
        android:id="@+id/KirimPesan"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="KIRIM PESAN"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_marginEnd="10dp"
        android:layout_marginBottom="10dp"
        android:onClick="kirim"
        />

    <EditText
        android:id="@+id/isipesan"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_toStartOf="@+id/KirimPesan"
        android:layout_marginStart="10dp"
        android:layout_marginBottom="10dp"
        android:hint="Tulis Pesan"
        />

</RelativeLayout>


====second

<?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=".SecondActivity">

    <TextView
        android:id="@+id/judul"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="10dp"
        android:layout_marginTop="10dp"
        android:text="Pesan Diterima"
        style="bold"
        android:textSize="18sp"
        android:textAppearance="@android:style/TextAppearance.Medium"/>

    <TextView
        android:id="@+id/text_received"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/judul"
        android:layout_marginStart="10dp"
        android:layout_marginTop="10dp"
        android:layout_marginEnd="10dp"
        android:textAppearance="@android:style/TextAppearance.Medium"
        android:textSize="16dp"
        android:background="@android:color/holo_green_light"
        />

</RelativeLayout>


===secon java

public class SecondActivity extends AppCompatActivity {

    TextView tvPesan2;
    String Pesan2;

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

        Intent intent = getIntent();
        tvPesan2 = findViewById(R.id.text_received);
        Pesan2 = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
        tvPesan2.setText(Pesan2);
    }


===main java

package com.example.latihan8;

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

public class MainActivity extends AppCompatActivity {

    EditText edPesan;
    public static final String EXTRA_MESSAGE = ".latihan8.extra.Message";
    public static final int TEXT_REQUEST = 1;

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

        edPesan = findViewById(R.id.isipesan);
    }

    public void kirim(View view) {
        Intent intent = new Intent(this, SecondActivity.class);
        String pesan = edPesan.getText().toString();
        intent.putExtra(EXTRA_MESSAGE, pesan);
        //startActivity(intent);
        startActivityForResult(intent, TEXT_REQUEST);
    }


}