當設定 Bluetooth 許可權限完成後，便可以開始編寫程式，首先是要設定手機藍牙，然後啟動手機藍牙，再掃描周邊的藍牙設備，顯示藍牙設備資料，選擇藍牙設備作綁定配對（Pair）。因為沒有其它這次綁定 Bluetooth（藍牙）設備，設備是一台舊 Huawei G7-TL00 手機，綁定配對（Pair）都成功。
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| Android Studio Bluetooth 綁定設備程式 |
開發環境：Android Studio 4.0.1 版本
原程式：C:\Development\Development_Android\Android_Project\DIY-Android-010-01B Bluetooth Pair
程式：C:\Development\Development_Android\Android_Project\DIY-Android-010-01B Bluetooth Pair
Bluetooth 掃描設備程式編程步驟：
設定 Bluetooth 許可權限後
設定手機藍牙
啟動手機藍牙
掃描周邊的藍牙設備
顯示周邊藍牙設備資料
選擇藍牙設備作綁定配對
MainActivity.java：
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import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import android.content.Intent; import android.content.Context; import android.content.IntentFilter; import android.view.View;
// Bluetooth API import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.content.BroadcastReceiver;
import java.lang.reflect.Method; import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
// GUI Components private TextView mtv_status; private Button mbtn_on; private Button mbtn_Scan; private Button mbtn_Pair; private Button mbtn_UnPair; private ListView mlv_device; private int mlvPosition;
private BluetoothAdapter mBTAdapter; private ArrayAdapter<String> mBTArrayAdapter;
private ArrayList<BluetoothDevice> mDeviceList = new ArrayList<BluetoothDevice>();
private final static int REQUEST_ENABLE_BT = 1; // used to identify adding bluetooth names
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);
mbtn_on = (Button) findViewById(R.id.btn_on); mbtn_Scan = (Button) findViewById(R.id.btn_scan); mbtn_Pair = (Button) findViewById(R.id.btn_pair); mbtn_UnPair=(Button) findViewById(R.id.btn_unpair);
mBTArrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1); mBTAdapter = BluetoothAdapter.getDefaultAdapter(); // get a handle on the bluetooth radio mlv_device = (ListView)findViewById(R.id.lv_device); mlv_device.setAdapter(mBTArrayAdapter); // assign model to view
mbtn_on.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { bluetoothOn(); } });
mbtn_Scan.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v){ scan(); } });
mbtn_Pair.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v){ BluetoothDevice device = mDeviceList.get(mlvPosition); Toast.makeText(getApplicationContext(),"Pair " + mlvPosition, Toast.LENGTH_SHORT).show(); pairDevice(device); } });
mbtn_UnPair.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v){ BluetoothDevice device = mDeviceList.get(mlvPosition); Toast.makeText(getApplicationContext(),"UnPair " + mlvPosition, Toast.LENGTH_SHORT).show(); unpairDevice(device); } });
// ListView mlv_device.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { ListView listView = (ListView) parent; mlvPosition = position; Toast.makeText(getApplicationContext(),"Select " + text3, Toast.LENGTH_SHORT).show(); } }); }
// Bluetooth Turn ON private void bluetoothOn(){ if (!mBTAdapter.isEnabled()) { Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT); Toast.makeText(getApplicationContext(),"Bluetooth Turned On",Toast.LENGTH_SHORT).show(); } else{ Toast.makeText(getApplicationContext(),"Bluetooth is Already On", Toast.LENGTH_SHORT).show(); } }
// Discovery Bluetooth Device private void scan(){ // Check if the device is already discovering mlvPosition = -1; mBTArrayAdapter.clear(); mDeviceList.clear();
if(mBTAdapter.isDiscovering()){ mBTAdapter.cancelDiscovery(); Toast.makeText(getApplicationContext(),"Scan Stopped",Toast.LENGTH_SHORT).show(); } else{ if(mBTAdapter.isEnabled()) { mBTArrayAdapter.clear(); // clear items mBTAdapter.startDiscovery(); Toast.makeText(getApplicationContext(), "Discovery Started", Toast.LENGTH_SHORT).show(); registerReceiver(blReceiver, new IntentFilter(BluetoothDevice.ACTION_FOUND)); registerReceiver(mPairReceiver, new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED)); } else{ Toast.makeText(getApplicationContext(), "Bluetooth Not On", Toast.LENGTH_SHORT).show(); } } }
private void pairDevice(BluetoothDevice device) { try { Method method = device.getClass().getMethod("createBond", (Class[]) null); method.invoke(device, (Object[]) null); } catch (Exception e) { e.printStackTrace(); } }
private void unpairDevice(BluetoothDevice device) { try { Method method = device.getClass().getMethod("removeBond", (Class[]) null); method.invoke(device, (Object[]) null); } catch (Exception e) { e.printStackTrace(); } }
final BroadcastReceiver blReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action)){ BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); mDeviceList.add(device); mBTArrayAdapter.add(device.getName() + "\n" + device.getAddress()); mBTArrayAdapter.notifyDataSetChanged(); } } };
private final BroadcastReceiver mPairReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) { final int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR); final int prevState = intent.getIntExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE, BluetoothDevice.ERROR); if (state == BluetoothDevice.BOND_BONDED＆＆prevState == BluetoothDevice.BOND_BONDING) { Toast.makeText(getApplicationContext(), "Pair", Toast.LENGTH_SHORT).show(); } else if (state == BluetoothDevice.BOND_NONE && prevState == BluetoothDevice.BOND_BONDED){ Toast.makeText(getApplicationContext(), "UnPair", Toast.LENGTH_SHORT).show(); } mBTArrayAdapter.notifyDataSetChanged(); } } }; } |
activity_main.xml：
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<?xml version="1.0" encoding="utf-8"?> <RelativeLayout 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=".MainActivity">
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentStart="true" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginStart="132dp" android:layout_marginLeft="132dp" android:layout_marginTop="16dp" android:text="Hello Bluetooth!" />
<Button android:id="@+id/btn_on" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentStart="true" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginStart="12dp" android:layout_marginLeft="12dp" android:layout_marginTop="40dp" android:text="ON" />
<Button android:id="@+id/btn_scan" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/btn_on" android:layout_alignParentStart="true" android:layout_alignParentLeft="true" android:layout_marginStart="10dp" android:layout_marginLeft="12dp" android:layout_marginTop="11dp" android:text="Scan" />
<ListView android:id="@+id/lv_device" android:layout_width="366dp" android:layout_height="333dp" android:layout_below="@+id/btn_scan" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginStart="16dp" android:layout_marginLeft="16dp" android:layout_marginTop="5dp" android:layout_marginBottom="246dp" />
<Button android:id="@+id/btn_pair" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_alignParentEnd="true" android:layout_alignParentRight="true" android:layout_marginTop="40dp" android:layout_marginEnd="15dp" android:layout_marginRight="15dp" android:text="Pair" />
<Button android:id="@+id/btn_unpair" android:layout_width="96dp" android:layout_height="wrap_content" android:layout_below="@+id/btn_pair" android:layout_alignParentEnd="true" android:layout_alignParentRight="true" android:layout_marginTop="10dp" android:layout_marginEnd="13dp" android:layout_marginRight="13dp" android:text="UnPair" />
</RelativeLayout> |
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| Android Studio Bluetooth 綁定設備程式 |
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