本文實例為大家分享了android實現藍牙app的具體代碼，供大家參考，具體內容如下
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private BluetoothGatt bluetoothGatt;private BluetoothGattService gattService;private BluetoothGattCharacteristic gattCharacteristic;private BluetoothManager bluetoothManager;private BluetoothAdapter bluetoothAdapter;private List<BluetoothDevice> devices = new ArrayList<>();private UUID serviceUUID; //不同設備 不同uuidprivate UUID characteristicUUID; //不同設備 不同uuidprivate final UUID service4UUID= UUID.fromString("0000fff0-0000-1000-8000-00805f9b34fb"); private final UUID charAUUID = UUID.fromString("0000fffa-0000-1000-8000-00805f9b34fb");private LightReceiver lightReceiver;private ScanReceiver scanReceiver;private ListView listView;private TextView tvrefresh;private String lightAction;@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Log.i("tag", "MainActivity onCreate()"); // listView = (ListView) findViewById(R.id.lv_bluetooth); tvrefresh = (TextView) findViewById(R.id.tv_refresh_bluetooth); tvrefresh.setOnClickListener(this); openBluetooth(); registeLigthReceiver(); registeScanReceiver();}@Overrideprotected void onStart() { super.onStart(); Log.i("tag", "MainActivity onStart()"); bluetoothScan();}//返回@Overridepublic boolean onKeyUp(int keyCode, KeyEvent event) { Log.i("tag", "MainActivity onKeyUp()"); this.finish(); return super.onKeyUp(keyCode, event);}//重新掃描藍牙@Overridepublic void onClick(View view) { switch (view.getId()) { case R.id.tv_refresh_bluetooth: //藍牙掃描 bluetoothScan(); break; default: break; }}//打開本地藍牙private void openBluetooth() { Log.i("tag", "openLocalBluetooth()"); //檢查手機是否支持藍牙4.0 if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) { Toast.makeText(this, "手機不支持藍牙4.0", Toast.LENGTH_SHORT).show(); finish(); } //調用系統服務的方式，請求開啟藍牙 bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE); bluetoothAdapter = bluetoothManager.getAdapter(); //開啟藍牙 if (!bluetoothAdapter.isEnabled()) { bluetoothAdapter.enable(); }}//開始藍牙掃描 掃描到一個添加一個private void bluetoothScan() { Log.i("tag", "bluetoothScan()"); if (bluetoothAdapter == null) { openBluetooth(); } if (!bluetoothAdapter.isDiscovering()) { bluetoothAdapter.startDiscovery(); //回調 } else { Toast.makeText(this, "掃描中..", Toast.LENGTH_SHORT).show(); }}//更新藍牙列表中的數據private void updateUi() { Log.i("tag", "updateUi()"); if (devices != null && devices.size() > 0) { BlueAdapter adapter = new BlueAdapter(this, devices); listView.setAdapter(adapter); adapter.notifyDataSetChanged(); } else { Toast.makeText(this, "附近沒有藍牙", Toast.LENGTH_SHORT).show(); }}//取得gatt 對應的serviceprivate BluetoothGattService getGattService(BluetoothGatt gatt, UUID serviceUUID) { List<BluetoothGattService> gattServices = gatt.getServices(); for (BluetoothGattService gattService : gattServices) { if (gattService.getUuid().equals(serviceUUID)) { return gattService; } } return null;}//取得service對應的characteristicprivate BluetoothGattCharacteristic getGattCharacteristic(BluetoothGattService gattService, UUID characteristicUUID) { List<BluetoothGattCharacteristic> gattCharacteristics = gattService.getCharacteristics(); for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) { if (gattCharacteristic.getUuid().equals(characteristicUUID)) { return gattCharacteristic; } } return null;}//注冊藍牙掃描監聽private void registeScanReceiver() { Log.i("tag", "registeScanReceiver()"); scanReceiver = new ScanReceiver(); IntentFilter filter = new IntentFilter(); filter.addAction(BluetoothDevice.ACTION_FOUND); filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); registerReceiver(scanReceiver, filter);}//定義藍牙掃描監聽類 添加device ， 更新界面class ScanReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Log.i("tag", " BluetoothReceiver / ScanReceiver onReceive() action=" + intent.getAction()); String scanAction = intent.getAction(); if (scanAction.equals(BluetoothDevice.ACTION_FOUND)) { BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); if (!devices.contains(device)) { devices.add(device); if (CacheUtils.getBlueDeviceString(MainActivity1.this, device.getAddress()).equals("")) { CacheUtils.putBlueDeviceString(MainActivity1.this, device.getAddress(), device.getName()); } updateUi(); } } else if (scanAction.equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)) { if (devices == null || devices.size() == 0) { Toast.makeText(MainActivity1.this, "附近沒有發現藍牙設備", Toast.LENGTH_SHORT).show(); } } }}//注冊燈光監聽private void registeLigthReceiver() { Log.i("tag", "registeReceiver()"); lightReceiver = new LightReceiver(); IntentFilter filter = new IntentFilter(); filter.addAction("openLight"); filter.addAction("closeLight"); registerReceiver(lightReceiver, filter);}//定義燈控監聽類class LightReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Log.i("tag", " BluetoothReceiver /LightReceiver onReceive() action=" + intent.getAction()); // String address = intent.getStringExtra("bluetoothAddress"); //從adapter取得的數據 lightAction = intent.getAction(); // if() 不同設備 不同serviceUUID，不同的characteristicUUID 自己確定 serviceUUID=service4UUID; characteristicUUID=charAUUID; if (bluetoothAdapter == null) { openBluetooth(); } BluetoothDevice device = bluetoothAdapter.getRemoteDevice(address); MyBluetoothGattCallback gattCallback = new MyBluetoothGattCallback(); bluetoothGatt = device.connectGatt(MainActivity1.this, false, gattCallback); //回調 }}//藍牙連接/通信回調class MyBluetoothGattCallback extends android.bluetooth.BluetoothGattCallback { @Override public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) { super.onConnectionStateChange(gatt, status, newState); Log.i("tag", "MyBluetoothGattCallback onConnectionStateChange() newState=" + newState); if (newState == BluetoothProfile.STATE_CONNECTED) { gatt.discoverServices(); //連接成功，開始搜索服務，一定要調用此方法，否則獲取不到服務 Log.i("tag", "MyBluetoothGattCallback STATE_CONNECTED "); } else if (newState == BluetoothProfile.STATE_DISCONNECTED) { Log.i("tag", "MyBluetoothGattCallback STATE_DISCONNECTED"); } } @Override public void onServicesDiscovered(BluetoothGatt gatt, int status) { super.onServicesDiscovered(gatt, status); Log.i("tag", "MyBluetoothGattCallback onServicesDiscovered() status=" + status); if (lightAction.equals("openLight") || lightAction.equals("closeLight")) { //避免 不停更新 if (gattService == null || gattCharacteristic == null || !serviceUUID.equals(service4UUID) || !characteristicUUID.equals(charAUUID)) { gattService = getGattService(gatt, serviceUUID); if (gattService != null) { gattCharacteristic = getGattCharacteristic(gattService, characteristicUUID); if (gattCharacteristic != null) { gatt.setCharacteristicNotification(gattCharacteristic, true); gatt.connect(); } } } if (lightAction.equals("openLight")) { gattCharacteristic.setValue("openLight"); //這里自己設置 藍牙模組需要的數據 gatt.writeCharacteristic(gattCharacteristic); } else if (lightAction.equals("closeLight")) { gattCharacteristic.setValue("closeLight"); //這里自己設置 藍牙模組需要的數據 gatt.writeCharacteristic(gattCharacteristic); } lightAction = ""; gatt.readRemoteRssi(); } }}@Overrideprotected void onDestroy() { super.onDestroy(); Log.i("tag", "onDestroy()"); if (bluetoothAdapter != null) { bluetoothAdapter.disable(); bluetoothAdapter = null; } if (bluetoothGatt != null) { bluetoothGatt.disconnect(); bluetoothGatt.close(); bluetoothGatt = null; } if (lightReceiver != null) { unregisterReceiver(lightReceiver); lightReceiver = null; } if (scanReceiver != null) { unregisterReceiver(scanReceiver); scanReceiver = null; 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以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/tangzheng828/article/details/52672345
