我正在尝试实现一项服务来控制通过BLE传入的数据。我有一个名为BluetoothDiscovery的活动，我在其中尝试显示附近的设备并选择连接到该设备。以我的理解，该服务应控制所有涉及BLE的非UI行为，例如绑定到活动时的接收和分发数据。然后，我将第二个Activity绑定到服务，以便能够访问实时数据以供使用。
我当前的问题是在BluetoothDiscovery与服务有关静态方法的争论之间。谁能帮助我了解如何实施这项服务？
import android.annotation.SuppressLint;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattDescriptor;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.ParcelUuid;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import no.nordicsemi.android.support.v18.scanner.BluetoothLeScannerCompat;
import no.nordicsemi.android.support.v18.scanner.ScanFilter;
import no.nordicsemi.android.support.v18.scanner.ScanResult;
import no.nordicsemi.android.support.v18.scanner.ScanSettings;
public class BluetoothDiscovery extends AppCompatActivity {
private String DEVICE = "Bluetooth Device";
private String COMMS = "Bluetooth Communication";
private int REQUEST_ENABLE_BT = 5;
//private BluetoothAdapter mBluetoothAdapter;
// private BluetoothLeScannerCompat scanner;
// private ScanSettings settings;
// private UUID baseUUID = UUID.fromString("6e400001-b5a3-f393-e0a9-e50e24dcca9e"); // service UUID
// private UUID txUUID = UUID.fromString("6e400002-b5a3-f393-e0a9-e50e24dcca9e"); // TX UUID characteristic
// private UUID rxUUID = UUID.fromString("6e400003-b5a3-f393-e0a9-e50e24dcca9e"); // RX UUID characteristic
// private ScanFilter scanFilter;
// private BluetoothDevice device, mdevice;
// private BluetoothGatt mGatt;
private boolean mScanning = false;
private ArrayList<deviceShowFormat> foundDevices = new ArrayList<>();
formattingAdapter BTadapter;
private ArrayList<String> xData = new ArrayList<>();
private ArrayList<String> yData = new ArrayList<>();
private ArrayList<String> zData = new ArrayList<>();
Button scanButton;
TextView fancyWords;
ListView deviceList;
Intent ServeBruh = new Intent(BluetoothDiscovery.this, BLEControl.class);
public BluetoothLeScannerCompat scanner;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bluetooth_discovery);
startService(ServeBruh);
// BluetoothManager manager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
// mBluetoothAdapter = manager.getAdapter();
//
scanner = BluetoothLeScannerCompat.getScanner();
// BluetoothManager manager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
// mBluetoothAdapter = manager.getAdapter();
//mBluetoothAdapter.getBluetoothLeScanner();
//mBluetoothAdapter.getDefaultAdapter();//.getBluetoothLeScanner();
scanButton = findViewById(R.id.scanButt);
scanButton.setText(getString(R.string.notScanning));
fancyWords = findViewById(R.id.discoverText);
fancyWords.setText(getString(R.string.nonScanTitle));
deviceList = findViewById(R.id.deviceList);
// BTadapter = new formattingAdapter(BluetoothDiscovery.this, foundDevices);
// deviceList.setAdapter(BTadapter);
// scanner = BluetoothLeScannerCompat.getScanner();
//
// settings = new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_BALANCED).setReportDelay(500).build();
//
// scanFilter = new ScanFilter.Builder().setServiceUuid(new ParcelUuid(baseUUID)).build();
//scanner.startScan(Arrays.asList(scanFilter), settings, mScanCallback);
deviceList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@SuppressLint("LongLogTag")
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
BLEControl.scanner.stopScan(BLEControl.mScanCallback);
scanButton.setText(getString(R.string.notScanning));
deviceShowFormat mBTDevice = foundDevices.get(i);
BluetoothDevice Device = mBTDevice.get_device();
String deviceName = mBTDevice.get_device_name();
String deviceAddress = mBTDevice.get_device_address();
Log.i(DEVICE, "Selected device: " + Device.toString());
Log.i(DEVICE, "Selected device name: " + deviceName);
Log.i(DEVICE, "Selected device address: " + deviceAddress);
BLEControl.connect(deviceAddress);
}
});
}
public void toggleScan(View view){
mScanning = !mScanning;
if(mScanning){
scanner.startScan(BLEControl.mScanCallback); //Arrays.asList(scanFilter) null, settings,
scanButton.setText(getString(R.string.scanInProgress));
fancyWords.setText(getString(R.string.ScanTitle));
} else {
scanner.stopScan(BLEControl.mScanCallback);
scanButton.setText(getString(R.string.notScanning));
}
}
@Override
protected void onDestroy(){
super.onDestroy();
stopService(ServeBruh);
}
}
import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattDescriptor;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.os.ParcelUuid;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import no.nordicsemi.android.support.v18.scanner.BluetoothLeScannerCompat;
import no.nordicsemi.android.support.v18.scanner.ScanCallback;
import no.nordicsemi.android.support.v18.scanner.ScanFilter;
import no.nordicsemi.android.support.v18.scanner.ScanResult;
import no.nordicsemi.android.support.v18.scanner.ScanSettings;
public class BLEControl extends Service {
private static String TAG = "BLE SERVICE";
public static BluetoothAdapter mBluetoothAdapter;
public static BluetoothLeScannerCompat scanner;
private ScanSettings settings;
private UUID baseUUID = UUID.fromString("6e400001-b5a3-f393-e0a9-e50e24dcca9e"); // service UUID
// private UUID txUUID = UUID.fromString("6e400002-b5a3-f393-e0a9-e50e24dcca9e"); // TX UUID characteristic
// private UUID rxUUID = UUID.fromString("6e400003-b5a3-f393-e0a9-e50e24dcca9e"); // RX UUID characteristic
private ScanFilter scanFilter;
private static BluetoothDevice device, mdevice;
public static BluetoothGatt mGatt;
private boolean mScanning = false;
private static ArrayList<deviceShowFormat> foundDevices = new ArrayList<>();
formattingAdapter BTadapter = new formattingAdapter(this, foundDevices);
// needs to be static???
private static String DEVICE = "Bluetooth Device";
public static ArrayList<String> xData = new ArrayList<>();
public static ArrayList<String> yData = new ArrayList<>();
public static ArrayList<String> zData = new ArrayList<>();
public BLEControl() {
String HELLO = "Hello";
}
@Override
public void onCreate() {
BluetoothManager manager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
mBluetoothAdapter = manager.getAdapter();
scanner = BluetoothLeScannerCompat.getScanner();
settings = new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_BALANCED).setReportDelay(500).build();
scanFilter = new ScanFilter.Builder().setServiceUuid(new ParcelUuid(baseUUID)).build();
//scanner.startScan(mScanCallback);
//scanner.startScan(Arrays.asList(scanFilter), settings, mScanCallback);
}
@Override
public void onDestroy() {
mGatt.disconnect();
mGatt.close();
}
@Override
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented");
}
@Override
public int onStartCommand(Intent intent, int flags, int startID) {
Log.i("LocalService", "Received start id " + startID + ": " + intent);
return super.onStartCommand(intent, flags, startID);
}
public static final ScanCallback mScanCallback = new ScanCallback() {
@Override
public void onScanResult(int callbackType, ScanResult result) {
super.onScanResult(callbackType, result);
Log.i("onScanResult", "device detected");
device = result.getDevice();
String deviceName = device.getName();
String deviceAddress = device.getAddress();
Log.i(DEVICE, "Scanned device: " + device.toString());
Log.i(DEVICE, "Scanned device name: " + deviceName);
Log.i(DEVICE, "Scanned device address: " + deviceAddress);
foundDevices.add(new deviceShowFormat(device, deviceName, deviceAddress));
BTadapter.notifyDataSetChanged(); // Y U SO DIFFICULT
}
};
public static BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
super.onConnectionStateChange(gatt, status, newState);
Log.i("onConnectionStateChange", "State Changed from: " + status + " to " + newState);
gatt.discoverServices();
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
super.onServicesDiscovered(gatt, status);
Log.i("onServicesDiscovered", "Hey, we found a service");
List<BluetoothGattService> services = gatt.getServices();
Log.i("SERVICE", "Services: " + services.toString());
BluetoothGattCharacteristic characteristic = services.get(4).getCharacteristics().get(0);
//gatt.getService(baseUUID).getCharacteristic(rxUUID);
gatt.setCharacteristicNotification(characteristic, true);
List<BluetoothGattDescriptor> describeMe = characteristic.getDescriptors();
Log.i("DESCRIPTORS", "Descriptors: " + describeMe.toString());
BluetoothGattDescriptor descriptor = characteristic.getDescriptor(describeMe.get(0).getUuid());
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
gatt.writeDescriptor(descriptor);
Log.i("ByeSERVICESDISCOVERED", "that");
}
@Override
public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
Log.i("onCharacteristicChanged", "Entered");
final byte[] dataInput = characteristic.getValue();
String butt = new String(dataInput);
Log.i("Message", "" + butt);
int whereX, whereY, whereZ;
if (butt.contains("X")) {
whereX = butt.indexOf("X");
try {
xData.add(butt.substring(whereX, whereX + 8));
} catch (Exception e) {
Log.d("X at end", "" + whereX);
}
} // Array ring counter looper
if (butt.contains("Y")) {
whereY = butt.indexOf("Y");
try {
yData.add(butt.substring(whereY, whereY + 8));
} catch (Exception e) {
Log.d("Y at end", "" + whereY);
}
}
if (butt.contains("Z")) {
whereZ = butt.indexOf("Z");
try {
zData.add(butt.substring(whereZ, whereZ + 8));
} catch (Exception e) {
Log.d("Z at end", "" + whereZ);
}
}
Log.i("X data", "" + xData);
Log.i("Y data", "" + yData);
Log.i("Z data", "" + zData);
// Intent intent = new Intent(BluetoothDiscovery.this, ShowData.class);
// startActivity(intent);
Log.i("onCharacteristicChanged", "Bye");
}
};
public boolean connect(final String address) {
final boolean returnVal;
if (mBluetoothAdapter == null || address == null) {
Log.w(TAG, "BluetoothAdapter not initialized or unspecified address.");
returnVal = false;
} else {
Log.d(TAG, "Trying to create a new connection.");
mBluetoothAdapter.getRemoteDevice(address);
mGatt = device.connectGatt(this, false, mGattCallback);
//mBluetoothAddress = address;
//setConnectionState(State.CONNECTING, true);
returnVal = true;
}
return returnVal;
}
}