Android Studio-da Bluetooth bilan ishlash

ACTION_REQUEST_DISCOVERABLE: Ushbu konstanta Bluetooth-ni topish uchun ishlatiladi.

ACTION_STATE_CHANGED: Ushbu konstanta Bluetooth holatining o'zgarishi to'g'risida xabar beradi.

ACTION_FOUND: Ushbu konstanta har bir topilgan qurilma haqida ma'lumot olish uchun ishlatiladi.

Bluetooth-ni yoqgandan so'ng, getBondedDevices() usulini chaqirib, bog'langan qurilmalar ro'yxatini olishingiz mumkin. Bunda bluetooth qurilmalar ro’yxati qaytariladi:
private Set boglanganQurilmalar;
boglanganQurilmalar = BA.getBondedDevices();
Bluetooth-ni ko'proq boshqarish imkoniyatini beradigan boshqa metodlar ham mavjud:

• 
  enable(): Ushbu usul adapter yoqilmagan bo'lsa, adapterni yoqadi.
  
• 
  isEnabled(): Agar adapter yoqilgan bo'lsa, bu usul true qiymatini qaytaradi.
  
• 
  disable(): Ushbu usul adapterni o'chiradi.
  
• 
  getName(): Ushbu usul Bluetooth adapterining nomini qaytaradi.
  
• 
  setName(String name): Ushbu usul Bluetooth nomini o'zgartiradi.
  
• 
  getState(): Ushbu usul Bluetooth adapterining joriy holatini qaytaradi.
  
• 
  startDiscovery(): Ushbu usul 120 soniya davomida Bluetooth-ni topish jarayonini boshlaydi.
  

Demak, Android Studio-da Bluetooth bilan ishlashni boshlaylik. Ushbu hozir yaratadigan ilovamiz Bluetooth-ni boshqarish va Bluetooth orqali bog'langan qurilmalar ro'yxatini ko'rsatish uchun BluetoothAdapter sinfidan foydalaniladi.
Android Studio-da yangi ilova yarating va uni “Bluetooth” deb nomlang. activity_main.xml faylini quyidagicha o’zgartiring:
<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"
android:padding="8dp"
android:transitionGroup="true"
tools:context=".MainActivity">


<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:onClick="on"
android:text="Yoqish" />


<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/button"
android:onClick="visible"
android:text="Ko'rinadigan qilish" />


<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/button2"
android:onClick="list"
android:text="Qurilmalar ro'yxati" />


<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/button3"
android:onClick="off"
android:text="O'chirish" />


<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/button3"
android:text="Ulangan qurilmalar:"
android:textColor="#f34ff0"
android:textSize="25sp" />


<ListView
android:id="@+id/listView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView2" />
RelativeLayout>
Bu kodda ilovaga 4-ta tugma, bitta TextView va bog’langan qurilmalar ro’yxatini ko’rsatuvchi ListView qo’shildi.
Endi tugmalar bilan ishlash uchun java kodini yozish kerak. Ya’ni, MainActivity.java faylini quyidagicha o’zgartiring:
package com.example.android.bluetooth;


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 boglanganQurilmalar;
ListView lv;


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


b1 = findViewById(R.id.button);
b2 = findViewById(R.id.button2);
b3 = findViewById(R.id.button3);
b4 = findViewById(R.id.button4);


BA = BluetoothAdapter.getDefaultAdapter();
lv = findViewById(R.id.listView);
}


public void on(View v) {
if (!BA.isEnabled()) {
Intent turnOn = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(turnOn, 0);
Toast.makeText(getApplicationContext(), "Yoqilgan", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(), "Allaqachon yoqilgan", Toast.LENGTH_LONG).show();
}
}


public void off(View v) {
BA.disable();
Toast.makeText(getApplicationContext(), "O'chirilgan", Toast.LENGTH_LONG).show();
}


public void visible(View v) {
Intent getVisible = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
startActivityForResult(getVisible, 0);
}


public void list(View v) {
boglanganQurilmalar = BA.getBondedDevices();


ArrayList list = new ArrayList();


for (BluetoothDevice bt : boglanganQurilmalar) list.add(bt.getName());
Toast.makeText(getApplicationContext(), "Ulangan qurilmalar ko'rsatilmoqda", Toast.LENGTH_SHORT).show();


final ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, list);


lv.setAdapter(adapter);
}
}
on() metodi Bluetooth-ni yoqadi, off() metodi esa Bluetooth-ni o’chiradi. list() metodi bog’langan qurilmalar ro’yxatini chiqarib beradi.
Endi AndroidManifest.xml faylini kerakli ruxsatlarni qo'shish uchun quyidagicha o'zgartiring:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.android.bluetooth">
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />


……………………………………………
 
Endi ilovani ishga tushiring. 
Agar sizni qurilmangizda Bluetooth yoqilmagan bo’lsa, sizdan Bluetooth-ni yoqish uchun ruxsat so'raydi:

Endi “KO’RINADIGAN QILISH” tugmasini bosing. Qurilmani boshqa Bluetooth qurilmalari uchun 120 soniyaga ko’rinadigan qilish uchun sizning ruxsatingizni so'ragan quyidagi dialog oynasi paydo bo'ladi:

Endi “QURILMALAR RO’YXATI” tugmasini bosing. U listView-da bog'langan qurilmalarning ro'yxatini ko'rsatadi. Menda faqat bitta ulangan qurilma bor:

Endi Bluetooth-ni o'chirib qo’yish uchun “O'CHIRISH” tugmasini bosing. Bluetooth-ni o'chirganingizda, Bluetooth o'chirilganligini ko'rsatuvchi quyidagi xabar paydo bo'ladi:

 
Sizlarga ulashmoqchi bo'lgan ma’lumotlarim shulardan iborat edi. Sizlarga foydali bo’ldi degan, umiddaman.