how to create menu in android studio

Updated date Feb 16, 2020

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Android is one of the most popular operating systems for mobile. In this article, I will show you how to create Bluetooth android applications using Android studio.

Introduction

Android is one of the most popular operating systems for mobile. In this article, I will show you how to create Bluetooth Android applications using Android Studio.

Requirements

Android Studio version 2.3.3
Little bit XML and JAVA knowledge.
Android Emulator (or) Android mobile
Download link (Android Studio)

Steps to be followed

Follow these steps to create a Bluetooth Android application. I have included the source code in the attachment.

Step 1

Open Android Studio and start a new Android Studio Project.

Android

Step 2

You can choose your application name and choose where your project is to be stored. If you wish to use C++ for coding the project, mark the "Include C++ support", and click the "Next" button.

Android

Now, select the version of Android and select the target Android devices.

Android

Step 3

Now, add the activity and click the "Next" button.

Android

Add activity name and click "Finish".

Android

Step 4

Go to activity_main.xml. This XML file contains the designing code for your Android app.

Android

The XML code is given below.

<?xml version= "1.0" encoding= "utf-8" ?>
<android.support.constraint.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="abu.bluetooth.MainActivity" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:text=""
android:id="@+id/out"
android:layout_width="wrap_content"
android:layout_height="wrap_content" ></TextView>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="30dp"
android:layout_marginTop="49dp"
android:text="ON" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button1"
android:layout_below="@+id/button1"
android:layout_marginTop="27dp"
android:text="COVERAGE" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button2"
android:layout_below="@+id/button2"
android:layout_marginTop="28dp"
android:text="OFF" />
</RelativeLayout>
</android.support.constraint.ConstraintLayout>

Step 5

Go to Main Activity.java. This Java program is the backend language for your app.

Android

The Java code is given below.

package abu.bluetooth;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private static final int REQUEST_ENABLE_BT = 0;
private static final int REQUEST_DISCOVERABLE_BT = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView out = (TextView) findViewById(R.id.out);
final Button button1 = (Button) findViewById(R.id.button1);
final Button button2 = (Button) findViewById(R.id.button2);
final Button button3 = (Button) findViewById(R.id.button3);
final BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.
getDefaultAdapter();
if (mBluetoothAdapter == null ) {
out.append("device not supported" );
}
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (!mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent =new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (!mBluetoothAdapter.isDiscovering()) {
Context context = getApplicationContext();
CharSequence text ="MAKING YOUR DEVICE DISCOVERABLE" ;
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
Intent enableBtIntent =new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
startActivityForResult(enableBtIntent, REQUEST_DISCOVERABLE_BT);
}
}
});
button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
mBluetoothAdapter.disable();
Context context = getApplicationContext();
CharSequence text ="TURNING_OFF BLUETOOTH" ;
int duration = Toast.LENGTH_LONG;
Toast toast = Toast.makeText(context, text, 15);
toast.show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true ;
}
}