我正在尝试连接（通过listview的onclick方法列出所有可用的蓝牙设备）到我的Class Bluetooth中的蓝牙设备。该类启动了intentservice BluetoothService，在那里我创建了一个BluetoothSocket并连接到Device。 连接工作后，我想去我的MainActivity，而我的连接打开，我想发送蓝牙消息。但是BluetoothConnection总是断开连接......
BLUETOOTH.JAVA
public class Bluetooth extends ActionBarActivity {
ArrayList arrayList1;
ListView lv;
ArrayAdapter<String> arrayAdapter;
MainActivity ma = new MainActivity();
BroadcastReceiver mReceiver;
static final String TAG = "Bluetooth";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.popup);
Intent intent = getIntent();
arrayList1=intent.getStringArrayListExtra("values");
lv= (ListView) findViewById(R.id.listView);
getSurroundingDevicesandConnect();
}
@Override
protected void onStart(){
super.onStart();
}
public void getSurroundingDevicesandConnect() {
setContentView(R.layout.popup);
ma.bluetooth.startDiscovery();
if (ma.bluetooth.startDiscovery()) {
System.out.println("discovery started");
mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
arrayAdapter.add(device.getName() + "\n" + device.getAddress());
System.out.println("while onreceive" + arrayList1);
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
Log.v(TAG, "Entered the Finished ");
ma.bluetooth.cancelDiscovery();
} else {
System.out.println("hoppala da funktioniert was nciht");
}
}
};
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter);
System.out.println("wurde registriert...");
}
setListView();
}
public void setListView() {
lv = (ListView) findViewById(R.id.listView);
arrayAdapter = new ArrayAdapter<String>(
this,
android.R.layout.select_dialog_item,
arrayList1
);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
// TODO Auto-generated method stub
String devicehelper = arrayList1.get(position).toString();
String[] device = devicehelper.split("\n");
String deviceName = device[0];
String deviceMAC = device[1];
//TODO: das hier muss in service..
Intent serviceIntent = new Intent();
serviceIntent.setAction("jritter.stamer.bluetoothtest.BluetoothService");
serviceIntent.putExtra("deviceMAC", deviceMAC);
BluetoothService bts = new BluetoothService();
bts.onHandleIntent(serviceIntent);
// boolean connected = connectWithDeviceNow(deviceMAC);
// if (connected) {
// System.out.println("Connected!");
// Toast.makeText(getApplicationContext(), "Connected", Toast.LENGTH_LONG).show();
// } else {
// System.out.println("Connection Failure");
// Toast.makeText(getApplicationContext(), "Connection Failure", Toast.LENGTH_LONG).show();
// }
// //onRestart();
// Toast.makeText(getApplicationContext(), "Mit Gerät " + deviceName + " verbunden", Toast.LENGTH_LONG);
}
});
lv.setAdapter(arrayAdapter);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.bluetooth, menu);
return true;
}
public void onDestroy(){
super.onDestroy();
unregisterReceiver(mReceiver);
}
}
BLUETOOTHSERVICE.JAVA
public class BluetoothService extends IntentService {
MainActivity ma = new MainActivity();
BluetoothSocket btSocket = null;
ConnectedThread mConnectedThread;
public BluetoothService() {
super("BluetoothService");
}
@Override
protected void onHandleIntent(Intent intent) {
String MAC = intent.getStringExtra("deviceMAC");
// create device and set the MAC address
BluetoothDevice device = ma.bluetooth.getRemoteDevice(MAC);//mydeviceaddress
System.out.println("devicename: " + device + device.getName());
ma.bluetooth.cancelDiscovery();
try {
btSocket = ma.createBluetoothSocket(device);
} catch (IOException e) {
System.out.println("socket creation failed");
}
// Establish the Bluetooth socket connection.
try {
btSocket.connect();
System.out.println("mit geraet verbunden");
} catch (IOException e) {
System.out.println("geraet nicht in eichweite");
try {
btSocket.close();
} catch (IOException e2) {
System.out.println("Socket closing doesnt work!");
}
}
mConnectedThread = new ConnectedThread(btSocket);
mConnectedThread.setPriority(Thread.MAX_PRIORITY);
mConnectedThread.start();
}
}
MAINACTIVITY.JAVA
public class MainActivity extends ActionBarActivity {
BluetoothAdapter bluetooth = BluetoothAdapter.getDefaultAdapter();
static final boolean D = true;
static final int REQUEST_ENABLE_BT = 2;
static final String TAG = "Bluetooth";
// String for MAC address
static String mydeviceaddress;
// SPP UUID service - this should work for most devices
static final UUID BTMODULEUUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
VerticalSeekBar Master, Channel1, Channel2, Channel3, Channel4, Channel5, Channel6, FX1, FX2, FX3, FX4;
CheckBox MuteMaster, Mute1, Mute2, Mute3, Mute4, Mute5, Mute6;
Button connect;
TextView textView;
ArrayList arrayList;
Spinner effects;
List<String> spinnerArray = new ArrayList<String>(Arrays.asList("no effect", "Hall A", "Hall B"));
VerticalSeekBar vsb;
private static long back_pressed;
//BroadcastReceiver mReceiver;
Intent intent;
//BluetoothService btservice;
ConnectedThread mConnectedThread;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initializeVariables();
deviceSupportBluetooth();//?
turnBluetoothOn();
intent = getIntent();
}
@Override
public synchronized void onResume() {
super.onResume();
if (D) Log.e(TAG, "+ ON RESUME +");
effectsConfig(effects);
connect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//do something...
//connect bluetooth activity
sendMessage(v);
}
});
seekbarConfig(Master, "Master");
seekbarConfig(Channel1, "Channel1");
seekbarConfig(Channel2, "Channel2");
seekbarConfig(Channel3, "Channel3");
seekbarConfig(Channel4, "Channel4");
seekbarConfig(Channel5, "Channel5");
seekbarConfig(Channel6, "Channel6");
muteConfig(MuteMaster);
muteConfig(Mute1);
muteConfig(Mute2);
muteConfig(Mute3);
muteConfig(Mute4);
muteConfig(Mute5);
muteConfig(Mute6);
}
//TODO: MCONNECTEDTHREAD
public void sendMessage(View view) {
Intent intent = new Intent(this, Bluetooth.class);
intent.putExtra("values", arrayList);
startActivity(intent);
}
private void initializeVariables() {
Master = (VerticalSeekBar) findViewById(R.id.Seekbar);
Channel1 = (VerticalSeekBar) findViewById(R.id.Seekbar1);
Channel2 = (VerticalSeekBar) findViewById(R.id.seekbar2);
Channel3 = (VerticalSeekBar) findViewById(R.id.seekbar3);
Channel4 = (VerticalSeekBar) findViewById(R.id.seekbar4);
Channel5 = (VerticalSeekBar) findViewById(R.id.seekbar5);
Channel6 = (VerticalSeekBar) findViewById(R.id.seekbar6);
vsb = (VerticalSeekBar) findViewById(R.id.impulse2);
textView = (TextView) findViewById(R.id.textView);
MuteMaster = (CheckBox) findViewById(R.id.muteMaster);
Mute1 = (CheckBox) findViewById(R.id.mute1);
Mute2 = (CheckBox) findViewById(R.id.mute2);
Mute3 = (CheckBox) findViewById(R.id.mute3);
Mute4 = (CheckBox) findViewById(R.id.mute4);
Mute5 = (CheckBox) findViewById(R.id.mute5);
Mute6 = (CheckBox) findViewById(R.id.mute6);
connect = (Button) findViewById(R.id.connect);
effects = (Spinner) findViewById(R.id.spinner2);
arrayList = new ArrayList();
}
//android...
@Override
public void onStart() {
super.onStart();
if (D) Log.e(TAG, "++ ON START ++");
}
@Override
public void onDestroy() {
super.onDestroy();
if (D) Log.e(TAG, "++ ON DESTROY ++");
}
protected void onStop() {
Log.w(TAG, "App stopped");
super.onStop();
}
public void onBackPressed(){
onResume();
if (back_pressed + 2000 > System.currentTimeMillis()) super.onBackPressed();
else Toast.makeText(getBaseContext(), "Press once again to exit!", Toast.LENGTH_SHORT).show();
back_pressed = System.currentTimeMillis();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onConfigurationChanged(Configuration newConfig)
{
super.onConfigurationChanged(newConfig);
}
// TODO GUI...
public void effectsConfig(Spinner spinner){
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
this, android.R.layout.simple_spinner_item, spinnerArray);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
Spinners abc = new Spinners();
abc.setSpinner(spinner);
abc.setmConnectedThread(mConnectedThread);
spinner.setOnItemSelectedListener(abc);
}
public void muteConfig(CheckBox mute){
Checkboxes abc = new Checkboxes();
abc.setmConnectedThread(mConnectedThread);
mute.setOnClickListener(abc);
}
public void seekbarConfig(VerticalSeekBar seekBar, final String fadername) {
Seekbars abc = new Seekbars();
abc.setFadername(fadername);
abc.setmConnectedThread(mConnectedThread);
seekBar.setOnSeekBarChangeListener(abc);
}
// TODO Bluetooth handling...
public BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException {
return device.createInsecureRfcommSocketToServiceRecord(BTMODULEUUID);
//creates secure outgoing connecetion with BT device using UUID
}
public void deviceSupportBluetooth() {
if (bluetooth == null) {
Toast.makeText(this, "Your Device does not support Bluetooth", Toast.LENGTH_LONG).show();
finish();
return;
}
}
public void turnBluetoothOn() {
if (!bluetooth.isEnabled()) {
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
// Otherwise, setup the control session
}
}
}
CONNECTEDTHREAD.JAVA
class ConnectedThread extends Thread {
MainActivity ma = new MainActivity();
private final InputStream mmInStream;
private final OutputStream mmOutStream;
final int handlerState = 0; //used to identify handler message
Handler bluetoothIn;
//creation of the connect thread
public ConnectedThread(BluetoothSocket socket) {
InputStream tmpIn = null;
OutputStream tmpOut = null;
try {
//Create I/O streams for connection
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) {
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
byte[] buffer = new byte[256];
int bytes;
// Keep looping to listen for received messages
while (true) {
try {
bytes = mmInStream.read(buffer); //read bytes from input buffer
String readMessage = new String(buffer, 0, bytes);
// Send the obtained bytes to the UI Activity via handler
bluetoothIn.obtainMessage(handlerState, bytes, -1, readMessage).sendToTarget();
} catch (IOException e) {
break;
}
}
}
//write method
public void write(String input) {
byte[] msgBuffer = input.getBytes(); //converts entered String into bytes
try {
mmOutStream.write(msgBuffer); //write bytes over BT connection via outstream
} catch (IOException e) {
//if you cannot write, close the application
Toast.makeText(ma.getBaseContext(), "Connection Failure", Toast.LENGTH_LONG).show();
ma.finish();
}
}
}
答案 0 :(得分：0)
您不希望使用IntentService。如果没有更多的工作要做，IntentService会自行关闭。这意味着只要您从onHandleIntent()返回，您的服务就会关闭。只需展开Service，然后将onHandleIntent()中的代码移至onStartCommand()即可。确保您从START_STICKY返回onHandleIntent()并确保您的代码在完成后停止Service。
下一个问题是在几个课程中你这样做：
MainActivity ma = new MainActivity();
这很糟糕。您无法使用new实例化Android组件。只有Android框架可以实例化Android组件（Service，Activity，BroadcastReceiver，ContentProvider），因为框架需要设置正确的Context。如果您需要调用Activity中的方法，则需要引用（Android创建的）Activity，或者您需要创建方法static。
你的代码很乱:-(你应该管理Service中的所有蓝牙内容，而不是部分地在Service和部分Activity中分发逻辑。你的课程这些都是相互依赖的。这是糟糕的设计并导致你出现问题。你需要在Service和Activity之间创建一个清晰，干净的界面。
查看你的logcat，看看有什么讨厌的异常被抛出。这很可能是导致“蓝牙断开连接”的原因