Bluetooth Program :
android_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:transitionGroup="true">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Bluetooth"
android:textAlignment="center"
android:layout_margin="20dp"
android:textSize="25sp"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="List Devices"
android:id="@+id/button3"
android:layout_margin="5dp"
android:onClick="list" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Paired devices:"
android:id="@+id/textView2"
android:textSize="25dp"
android:layout_marginTop="20dp" />
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listView"
android:layout_below="@+id/textView2"
android:layout_marginLeft="10dp"
/>
</LinearLayout>
MainActivity.java:
package com.example.s23bluthooth;
import androidx.appcompat.app.AppCompatActivity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Set;
public class MainActivity extends AppCompatActivity {
Button b1,b2,b3,b4;
private BluetoothAdapter BA;
private Set<BluetoothDevice>pairedDevices;
ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b3 = (Button) findViewById(R.id.button3);
BA = BluetoothAdapter.getDefaultAdapter();
lv = (ListView)findViewById(R.id.listView);
public void list(View v){
pairedDevices = BA.getBondedDevices();
ArrayList list = new ArrayList();
for(BluetoothDevice bt : pairedDevices)
list.add(bt.getName());
Toast.makeText(getApplicationContext(), "Showing Paired
Devices",Toast.LENGTH_SHORT).show();
final ArrayAdapter adapter = new
ArrayAdapter(this,android.R.layout.simple_list_item_1, list);
lv.setAdapter(adapter);
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission
android:name="android.permission.BLUETOOTH_ADVERTISE"/>
<uses-permission
android:name="android.permission.BLUETOOTH_CONNECT"/>
<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.S23Bluthooth"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
