How to set Visibility for a button from another activity in Android Studio - RSM Developer

set Visibility for a button

 Step 1: Creating a new project

• Open a new project.
• We will be working on Empty Activity with language as Java. Leave all other options unchanged.
• You can change the name of the project at your convenience.
• There will be two default files named activity_main.xml and MainActivity.java.

Step 2: Open res -> layout ->activity_main.xml (or) main.xml and add following code:

In this step we open an XML file and add the code :-

<?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:orientation="vertical"
    android:background="@color/white"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/Button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="30sp"
        android:backgroundTint="@color/teal_700"
        android:text="Button1" />
    <Button
        android:id="@+id/Button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="30sp"
        android:backgroundTint="@color/teal_700"
        android:text="Button2" />
    <Button
        android:id="@+id/Button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="30sp"
        android:backgroundTint="@color/teal_700"
        android:text="Button3" />
    <Button
        android:id="@+id/Button4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="30sp"
        android:backgroundTint="@color/teal_700"
        android:text="Button4" />
</LinearLayout>

Step 3: Open Java -> package – > MainActivity.Java and add following code:

In this step we open an Java file and add the code :-

package com.rsmdeveloper.visibility;
    //===============================================================
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import androidx.appcompat.app.AppCompatActivity;
    //===============================================================
public class MainActivity extends AppCompatActivity {
    //===============================================================
    Button Button1, Button2, Button3, Button4;
    //===============================================================
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        //===============================================================
        Button1 = findViewById(R.id.Button1);
        Button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Button 1
                Intent nextActivity = new Intent(MainActivity.this, MainActivity2.class);
                Bundle bundle = new Bundle();
                bundle.putInt("VAL", 1);
                nextActivity.putExtras(bundle);
                startActivity(nextActivity);
            }
        });
        //===============================================================
        Button2 = findViewById(R.id.Button2);
        Button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Button 2
                Intent nextActivity = new Intent(MainActivity.this, MainActivity2.class);
                Bundle bundle = new Bundle();
                bundle.putInt("VAL", 2);
                nextActivity.putExtras(bundle);
                startActivity(nextActivity);
            }
        });
        //===============================================================
        Button3 = findViewById(R.id.Button3);
        Button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Button 3
                Intent nextActivity = new Intent(MainActivity.this, MainActivity2.class);
                Bundle bundle = new Bundle();
                bundle.putInt("VAL", 3);
                nextActivity.putExtras(bundle);
                startActivity(nextActivity);
            }
        });
        //===============================================================
        Button4 = findViewById(R.id.Button4);
        Button4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Button 4
                Intent nextActivity = new Intent(MainActivity.this, MainActivity2.class);
                Bundle bundle = new Bundle();
                bundle.putInt("VAL", 4);
                nextActivity.putExtras(bundle);
                startActivity(nextActivity);
            }
        });
        //===============================================================

    }
}

Step 4: Create a New Empty Activity with language as
Java :-Open ->res -> layout ->activity_main2.xml and add following code:
In this step we open an XML file and add the code :-

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    tools:context=".MainActivity2">

    <LinearLayout
        android:visibility="gone"
        android:id="@+id/Activity1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#8BC34A"
        >
        <TextView
            android:text="Activity1"
            android:textStyle="bold"
            android:textColor="@color/black"
            android:textSize="20sp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:gravity="center"
            />
    </LinearLayout>
    <LinearLayout
        android:visibility="gone"
        android:id="@+id/Activity2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#FFEB3B"
        >
        <TextView
            android:text="Activity2"
            android:textStyle="bold"
            android:textColor="@color/black"
            android:textSize="20sp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:gravity="center"
            />
    </LinearLayout>
    <LinearLayout
        android:visibility="gone"
        android:id="@+id/Activity3"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#FF9800"
        >
        <TextView
            android:text="Activity3"
            android:textStyle="bold"
            android:textColor="@color/black"
            android:textSize="20sp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:gravity="center"
            />
    </LinearLayout>
    <LinearLayout
        android:visibility="gone"
        android:id="@+id/Activity4"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#FF5722"
        >
        <TextView
            android:text="Activity4"
            android:textStyle="bold"
            android:textColor="@color/black"
            android:textSize="20sp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:gravity="center"
            />
    </LinearLayout>


</RelativeLayout>

Step 5: Open -> package – > MainActivity2.Java and add the following code.
In this step we open an Java file and add the code :-
package com.rsmdeveloper.visibility;
//===============================================================
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;

import androidx.appcompat.app.AppCompatActivity;
//===============================================================
public class MainActivity2 extends AppCompatActivity {
    //===============================================================
    LinearLayout Activity1, Activity2, Activity3, Activity4;
    //===============================================================
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
//===============================================================
        Activity1 = findViewById(R.id.Activity1);
        Activity2 = findViewById(R.id.Activity2);
        Activity3 = findViewById(R.id.Activity3);
        Activity4 = findViewById(R.id.Activity4);
        //===============================================================
        Bundle bun=getIntent().getExtras();
        int val =bun.getInt("VAL");
        //===============================================================
        if(val==1) {
            Activity1.setVisibility(View.VISIBLE);
            Activity2.setVisibility(View.GONE);
            Activity3.setVisibility(View.GONE);
            Activity4.setVisibility(View.GONE);
        } //===============================================================
        else if (val == 2){
            Activity1.setVisibility(View.GONE);
            Activity2.setVisibility(View.VISIBLE);
            Activity3.setVisibility(View.GONE);
            Activity4.setVisibility(View.GONE);
        } //===============================================================
        else if (val == 3){
            Activity1.setVisibility(View.GONE);
            Activity2.setVisibility(View.GONE);
            Activity3.setVisibility(View.VISIBLE);
            Activity4.setVisibility(View.GONE);
        } //===============================================================
       else if (val == 4){
            Activity1.setVisibility(View.GONE);
            Activity2.setVisibility(View.GONE);
            Activity3.setVisibility(View.GONE);
            Activity4.setVisibility(View.VISIBLE);
        }//===============================================================

    }
}

Output:
Now run the App and you will see main topics and sub-topics listed.....
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