What function should i use to open the activities of each button on android studio?-CodePudding

I'm having small problem on my project. I can't open the activities of each button after clicking it. I don't know if the codes I used are correct. please help me fix it. Thank you.

activity_main2.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".MainActivity2"
android:background="@drawable/backgroundimg">

<Button
    android:id="@ id/button"
    android:layout_width="270dp"
    android:layout_height="60dp"
    android:backgroundTint="@android:color/holo_blue_dark"
    android:text="Sleep"
    android:textAllCaps="false"
    android:textColor="#FFFFFF"
    android:textSize="20dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.496"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.299" />

<Button
    android:id="@ id/button1"
    android:layout_width="270dp"
    android:layout_height="60dp"
    android:backgroundTint="@android:color/holo_blue_dark"
    android:text="Stress Reliever"
    android:textAllCaps="false"
    android:textColor="#FFFFFF"
    android:textSize="20dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.503"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.433" />

<Button
    android:id="@ id/button2"
    android:layout_width="270dp"
    android:layout_height="60dp"
    android:backgroundTint="@android:color/holo_blue_dark"
    android:text="Calm"
    android:textAllCaps="false"
    android:textColor="#FFFFFF"
    android:textSize="20dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.503"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.57" />

<Button
    android:id="@ id/button3"
    android:layout_width="270dp"
    android:layout_height="60dp"
    android:backgroundTint="@android:color/holo_blue_dark"
    android:text="Motivational Quotes"
    android:textAllCaps="false"
    android:textColor="#FFFFFF"
    android:textSize="20dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.503"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.701" />

<TextView
    android:id="@ id/goodday"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Good Day,"
    android:textColor="@color/white"
    android:textSize="20pt"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.078"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.04" />

<TextView
    android:id="@ id/name"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Melana!"
    android:textColor="@color/white"
    android:textSize="17pt"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.059"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.112" />

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity2.java

package com.example.serenityapplication;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity2 extends AppCompatActivity {

Button butt1;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);

    butt1=(Button) findViewById(R.id.button);

    butt1.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            setContentView(R.layout.activity_stress);
        }
    });


}

}

This is what the app looks like and the four buttons should open their respective activities

CodePudding user response：

This is just an example. As someone answered here, you could just search how to start a new activity.

butt1.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            Intent navigateToAnotherActivity = new Intent(this, SleepActivity.class);
            startActivity(navigateToAnotherActivity);
        }
    });

CodePudding user response：

to navigate from one activity to another intent is used

Intent intent = new Intent(this, TargetActivity.class)
startActivity(intent)

CodePudding user response：

As I can see in the screenshot you provided. You have created 4 different activities. You just need to open them using the below code.

This code goes inside the onCreate() method of MainActivity2

public class MainActivity2 extends AppCompatActivity {

    private Button bt_Sleep, bt_Stress_Reliever, bt_Calm, bt_Motivational_Quotes;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        bt_Sleep = findViewById(R.id.button);
        bt_Stress_Reliever = findViewById(R.id.button1);
        bt_Calm = findViewById(R.id.button2);
        bt_Motivational_Quotes = findViewById(R.id.button3);

        bt_Sleep.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent sleep = new Intent(MainActivity2.this, sleep.class);
                startActivity(sleep);
            }
        });

        bt_Stress_Reliever.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent stressReliever = new Intent(MainActivity2.this, stress.class);
                startActivity(stressReliever);
            }
        });

        bt_Calm.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //calm change with your actual activity name
                Intent calmIntent = new Intent(MainActivity2.this, calm.class);
                startActivity(calmIntent);
            }
        });

        bt_Motivational_Quotes.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //motivational_quotes change with your actual activity name
                Intent mq = new Intent(MainActivity2.this, motivational_quotes.class);
                startActivity(mq);
            }
        });

    }   
}

This code should work. Still facing problem comment here.