我如何取消这项服务：
private void startService(Class<?> service, ServiceConnection serviceConnection, Bundle extras) {
if (!UsbService.SERVICE_CONNECTED) {
Intent startService = new Intent(this, service);
if (extras != null && !extras.isEmpty()) {
Set<String> keys = extras.keySet();
for (String key : keys) {
String extra = extras.getString(key);
startService.putExtra(key, extra);
}
}
startService(startService);
}
Intent bindingIntent = new Intent(this, service);
bindService(bindingIntent, serviceConnection, Context.BIND_AUTO_CREATE);
}
我尝试这样做：
Intent intent = new Intent(MainMenu.this, UsbService.class);
stopService(intent);
但是该服务始终有效。''
这是我的服务：
public class UsbService extends Service {
public static final String ACTION_USB_READY = "pl.gps.connectivityservices.USB_READY";
public static final String ACTION_USB_ATTACHED = "android.hardware.usb.action.USB_DEVICE_ATTACHED";
public static final String ACTION_USB_DETACHED = "android.hardware.usb.action.USB_DEVICE_DETACHED";
public static final String ACTION_USB_NOT_SUPPORTED = "pl.gps.usbservice.USB_NOT_SUPPORTED";
public static final String ACTION_NO_USB = "pl..gps.usbservice.NO_USB";
public static final String ACTION_USB_PERMISSION_GRANTED = "pl.gps.usbservice.USB_PERMISSION_GRANTED";
public static final String ACTION_USB_PERMISSION_NOT_GRANTED = "pl.gps.usbservice.USB_PERMISSION_NOT_GRANTED";
public static final String ACTION_USB_DISCONNECTED = "pl.gps.usbservice.USB_DISCONNECTED";
public static final String ACTION_CDC_DRIVER_NOT_WORKING = "pl.gps.connectivityservices.ACTION_CDC_DRIVER_NOT_WORKING";
public static final String ACTION_USB_DEVICE_NOT_WORKING = "pl.gps.connectivityservices.ACTION_USB_DEVICE_NOT_WORKING";
public static final int MESSAGE_FROM_SERIAL_PORT = 1;
private static final String ACTION_USB_PERMISSION = "com.android.example.USB_PERMISSION";
private static final int BAUD_RATE = 9600; // BaudRate. Change this value if you need
public static boolean SERVICE_CONNECTED = false;
private IBinder binder = new UsbBinder();
private Context context;
private Handler mHandler;
private UsbManager usbManager;
private UsbDevice device;
private UsbDeviceConnection connection;
private UsbSerialDevice serialPort;
private boolean serialPortConnected;
/*
* Data received from serial port will be received here. Just populate onReceivedData with your code
* In this particular example. byte stream is converted to String and send to UI thread to
* be treated there.
*/
String date = "";
public static boolean check(String s) {
if (s.contains("$GNRMC")) {
return true;
}
return false;
}
private UsbSerialInterface.UsbReadCallback mCallback = new UsbSerialInterface.UsbReadCallback() {
@Override
public void onReceivedData(byte[] arg0) {
try {
Thread.sleep(700);
} catch (InterruptedException e) {
e.printStackTrace();
}
try {
String data = new String(arg0, "UTF-8");
if (mHandler != null) {
mHandler.obtainMessage(MESSAGE_FROM_SERIAL_PORT, data).sendToTarget();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
};
private final BroadcastReceiver usbReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context arg0, Intent arg1) {
if (arg1.getAction().equals(ACTION_USB_PERMISSION)) {
boolean granted = arg1.getExtras().getBoolean(UsbManager.EXTRA_PERMISSION_GRANTED);
if (granted) // User accepted our USB connection. Try to open the device as a serial port
{
Intent intent = new Intent(ACTION_USB_PERMISSION_GRANTED);
arg0.sendBroadcast(intent);
connection = usbManager.openDevice(device);
serialPortConnected = true;
new ConnectionThread().run();
} else // User not accepted our USB connection. Send an Intent to the Main Activity
{
Intent intent = new Intent(ACTION_USB_PERMISSION_NOT_GRANTED);
arg0.sendBroadcast(intent);
}
} else if (arg1.getAction().equals(ACTION_USB_ATTACHED)) {
if (!serialPortConnected)
findSerialPortDevice(); // A USB device has been attached. Try to open it as a Serial port
} else if (arg1.getAction().equals(ACTION_USB_DETACHED)) {
// Usb device was disconnected. send an intent to the Main Activity
Intent intent = new Intent(ACTION_USB_DISCONNECTED);
arg0.sendBroadcast(intent);
serialPortConnected = false;
serialPort.close();
}
}
};
/*
* onCreate will be executed when service is started. It configures an IntentFilter to listen for
* incoming Intents (USB ATTACHED, USB DETACHED...) and it tries to open a serial port.
*/
@Override
public void onCreate() {
this.context = this;
serialPortConnected = false;
UsbService.SERVICE_CONNECTED = true;
setFilter();
usbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
findSerialPortDevice();
}
/* MUST READ about services
* http://developer.android.com/guide/components/services.html
* http://developer.android.com/guide/components/bound-services.html
*/
@Override
public IBinder onBind(Intent intent) {
return binder;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return Service.START_NOT_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
UsbService.SERVICE_CONNECTED = false;
}
/*
* This function will be called from MainActivity to write data through Serial Port
*/
public void write(byte[] data) {
if (serialPort != null)
serialPort.write(data);
}
public void setHandler(Handler mHandler) {
this.mHandler = mHandler;
}
private void findSerialPortDevice() {
// This snippet will try to open the first encountered usb device connected, excluding usb root hubs
HashMap<String, UsbDevice> usbDevices = usbManager.getDeviceList();
HashMap<String, UsbDevice> usbDevices1 = new HashMap<String, UsbDevice>();
usbDevices1.clear();
if (!usbDevices.isEmpty()) {
boolean keep = true;
for (Map.Entry<String, UsbDevice> entry : usbDevices.entrySet()) {
device = entry.getValue();
int deviceVID = device.getVendorId();
int devicePID = device.getProductId();
if (deviceVID == 1659 && devicePID == 8963) {
// There is a device connected to our Android device. Try to open it as a Serial Port.
requestUserPermission();
keep = false;
if (!keep)
break;
}
}
if (!keep) {
// There is no USB devices connected (but usb host were listed). Send an intent to MainActivity.
Intent intent = new Intent(ACTION_NO_USB);
sendBroadcast(intent);
}
} else {
// There is no USB devices connected. Send an intent to MainActivity
Intent intent = new Intent(ACTION_NO_USB);
sendBroadcast(intent);
}
}
public void unReg(){
// if(usbReceiver != null)
// unregisterReceiver(usbReceiver);
}
private void setFilter() {
IntentFilter filter = new IntentFilter();
filter.addAction(ACTION_USB_PERMISSION);
filter.addAction(ACTION_USB_DETACHED);
filter.addAction(ACTION_USB_ATTACHED);
registerReceiver(usbReceiver, filter);
}
private void requestUserPermission() {
PendingIntent mPendingIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
usbManager.requestPermission(device, mPendingIntent);
}
public class UsbBinder extends Binder {
public UsbService getService() {
return UsbService.this;
}
}
private class ConnectionThread extends Thread {
@Override
public void run() {
serialPort = UsbSerialDevice.createUsbSerialDevice(device, connection);
if (serialPort != null) {
if (serialPort != null && serialPort.open()) {
serialPort.setBaudRate(BAUD_RATE);
serialPort.setDataBits(UsbSerialInterface.DATA_BITS_8);
serialPort.setStopBits(UsbSerialInterface.STOP_BITS_1);
serialPort.setParity(UsbSerialInterface.PARITY_NONE);
serialPort.setFlowControl(UsbSerialInterface.FLOW_CONTROL_OFF);
serialPort.read(mCallback);
Intent intent = new Intent(ACTION_USB_READY);
context.sendBroadcast(intent);
} else {
if (serialPort instanceof CDCSerialDevice) {
Intent intent = new Intent(ACTION_CDC_DRIVER_NOT_WORKING);
context.sendBroadcast(intent);
} else {
Intent intent = new Intent(ACTION_USB_DEVICE_NOT_WORKING);
context.sendBroadcast(intent);
}
}
} else {
Intent intent = new Intent(ACTION_USB_NOT_SUPPORTED);
context.sendBroadcast(intent);
}
}
}
}
但是我的意图服务窃取正在奏效。当我销毁创建该服务的活动时，我尝试做些什么，但是当该活动在日志中销毁时，我发现该意图服务一直都是钢制工作
答案 0 :(得分：2)
尝试一下
使用 stopSelf（）;
一旦请求使用stopSelf（）停止，系统就会尽快销毁该服务。
故意传递一些动作
Intent intent = new Intent(MainMenu.this, UsbService.class);
intent.setAction(Constants.ACTION.STOPTFOREGROUND_ACTION);
stopService(intent);
在您的服务中onStartCommand（）
if(intent.getAction()==Constants.ACTION.STOPTFOREGROUND_ACTION){
stopForeground(true);
stopSelf();
}
public class Constants {
public interface ACTION {
String STOPFOREGROUND_ACTION = "com.package.packageName.action.stopforeground";
}
}