Currently I developed a new method to discover bluetooh ready connections. Here is my code:
private void DiscoverOBDConnection() {
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mBluetoothAdapter.startDiscovery();
BroadcastReceiver mReceiver;
// Create a BroadcastReceiver for ACTION_FOUND
final List<String> discoverableDevicesList = new ArrayList<String>();
mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
short rssi = intent.getShortExtra(BluetoothDevice.EXTRA_RSSI, Short.MIN_VALUE);
discoverableDevicesList.add(device.getName() + "\n" + device.getAddress() + "\n" + rssi);
String discoveredDeviceName = device.getName();
discoverableDevicesList.add(discoveredDeviceName);
}
}
};
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
context.registerReceiver(mReceiver,filter); // Don't forget to unregister during onDestroy
}
I just do not know how to call the onreceive method from another method. Could you help me to learn how to implement and discover the ready to connect bluetooth devices?
You can just send broadcast
Intent i = new Intent(BluetoothDevice.ACTION_FOUND);
sendBroadcast(i);
Or call it directly
mReceiver.onReceive(this, new Intent(BluetoothDevice.ACTION_FOUND));
Related
My intention is to make my android app that only connects to the specific bluetooth name. For Example, I want to connect it to "ABC" only . I tried
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Discovery has found a device. Get the BluetoothDevice
// object and its info from the Intent.
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// HERE
}
}
};
How DO I specifically get the name to the output?
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Discovery has found a device. Get the BluetoothDevice
// object and its info from the Intent.
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
String deviceName = device.getName();
//
// use try-catch to keep tying on the logic -- John Melody added
try {
if (deviceName.contains("somethingsomething")) {
System.out.println(String.format("Ok %s", deviceName));
}
} catch(Exception e) {
e.printStackTrace();
}
//
}
}
};
Checkout[this][1] link
[1] : https: //developer.android.com/guide/topics/connectivity/bluetooth#FindingDevices
I am trying to discover bluetooth devices nearby. I followed tutorials but I can't figure out why onReceive() method is never called. Even though startDiscovery() is successful,the method onReceive() never gets called. I have added the proper permissions to the manifest
if(adapter.isDiscovering()) {
adapter.cancelDiscovery();
if (adapter.startDiscovery())
test.setText("Searching >>>");
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
Receiver receiver = new Receiver();
registerReceiver(receiver, filter);
}
}
if(!adapter.isDiscovering()) {
if (adapter.startDiscovery())
test.setText("Searching >>>");
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
Receiver receiver = new Receiver();
registerReceiver(receiver, filter);
}
private class Receiver extends BroadcastReceiver {
public Receiver() {
}
#Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
devices = new ArrayList<BluetoothDevice> ();
devices.add(device);
listAdapter = new DeviceListAdapter(context,R.layout.activity_bluetooth_connection,devices);
pairedDivices = (ListView) findViewById(R.id.pairedDevices);
pairedDivices.setAdapter(listAdapter);
if(devices.isEmpty())
test.setText("no devices");
}
}
}
I am trying to discover all available bluetooth devices and pass to another activity.
However even when looking at the Android Docs, I am unable to figure out why I cannot discover any devices and my ArrayList remains empty.
OnClick execute this:
mBluetoothAdapter.startDiscovery();
My broadcast listener also works but nothing is every returned and ArrayList remains empty.
private final BroadcastReceiver 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);
mDeviceList.add(device);
showToast("Found device " + device.getName());
}
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
if (state == BluetoothAdapter.STATE_ON) {
showToast("Enabled");
showEnabled();
}
}
if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
mDeviceList = new ArrayList<>();
mProgressDlg.show();
}
if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
mProgressDlg.dismiss();
Intent newIntent = new Intent(MainScreen.this, DeviceListActivity.class);
if (mDeviceList.isEmpty()){
Log.d("onReceive: ", "EMPTY");
}
newIntent.putParcelableArrayListExtra("device.list", mDeviceList);
startActivity(newIntent);
}
}
};
GIST
Answered my own question.
The fix was to turn location on with app permissions.
Apparently this is required for Android Marshmallow
I have a mUsbReceiver (BroadcastReceiver) and CameraActivity. The receiver setContentView(R.layout.main) from CameraActivity via an Intent. Then CamearActivity updates its View with this value. Notice that the setContentView is in the Broadcast receiver class and not in the CameraActivity Class.
public class CameraActivity extends Activity {
private static final String TAG = "openXC::Activity";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
usbConnection();
}
public void usbConnection() {
UsbManager mUsbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
PendingIntent mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), PendingIntent.FLAG_CANCEL_CURRENT);
IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
registerReceiver(mUsbReceiver, filter);
String txt = "default";
HashMap<String, UsbDevice> deviceList = mUsbManager.getDeviceList();
Log.i(TAG, "Device List: " + deviceList);
Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();
UsbDevice device = deviceIterator.next();
Log.i(TAG, "Device List: " + deviceList);
mUsbManager.requestPermission(device, mPermissionIntent);
}
private static final String ACTION_USB_PERMISSION ="com.ford.openxc.webcam.USB_PERMISSION";
private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (ACTION_USB_PERMISSION.equals(action)) {
synchronized (this) {
UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
if(device != null){
Log.d(TAG, "Displayed Comten View " + device);
setContentView(R.layout.main);
}
}
else {
Log.d(TAG, "permission denied for device " + device);
}
}
}
}
};
}
This works fine sometimes but sometimes throws the following error
I/openXC::Activity( 5609): Device List: {/dev/bus/usb/001/002=UsbDevice[mName=/dev/bus/usb/001/002,mVendorId=1133,mProductId=2085,mClass=239,mSubclass=2,mProtocol=1,mInterfaces=[Landroid.os.Parcelable;#421a1f50]}
I/openXC::Activity( 5609): Device List: {/dev/bus/usb/001/002=UsbDevice[mName=/dev/bus/usb/001/002,mVendorId=1133,mProductId=2085,mClass=239,mSubclass=2,mProtocol=1,mInterfaces=[Landroid.os.Parcelable;#421a1f50]}
I/Adreno200-EGLSUB( 5609): <ConfigWindowMatch:2087>: Format RGBA_8888.
E/ ( 5609): <s3dReadConfigFile:75>: Can't open file for reading
E/ ( 5609): <s3dReadConfigFile:75>: Can't open file for reading
D/openXC::Activity( 5609): Displayed Comten View UsbDevice[mName=/dev/bus/usb/001/002,mVendorId=1133,mProductId=2085,mClass=239,mSubclass=2,mProtocol=1,mInterfaces=[Landroid.os.Parcelable;#421d3ed0]
D/WebcamPreview( 5609): WebcamPreview constructed
Technically, you can call setContentView any time you are executing on the event thread.
Otherwise you need to use a Handler to call it.
Also, here are some usefull links that might help you:
link1
link 2
link 3
I dont have much exp on USB sort of thing but since u said its saying cannot readfile.. i believe dat the error may be in the usb so for the debugging purpose i would suggest to move the setContentView(int) from if conditions to the onRecieve directly so dat whenever the onReceive is called ur contenview will change , this will help to ensure that the error is not with setcontentview... After dat u can see without setcontentview in the usb and now if the error is coming then surely the error is in the usb and not in the setContentView ....
Hope it works :)
how is it possible to get the Bluetooth information (name, Mac address,...) of the peer device that the android device is connected to that via Bluetooth ?
You can use the following code to get all remote devices :)
private void discoveryDevice(){
// Register the BroadcastReceiver
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter); // Don't forget to unregister during onDestroy
mBluetoothAdapter.startDiscovery();
}
// Create a BroadcastReceiver for ACTION_FOUND
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
Log.d(TAG, "device " + device.getName() + "\n" + device.getAddress());
}
}
};
It's really good for you to get the name of remote device throught the code:
Log.d(TAG, "device " + device.getName() + "\n" + device.getAddress());
I can't test this code at this moment but maybe can give an idea to how you can get the name and others parameters of bluetooth.
static BluetoothSocket socket ;
public static boolean btCon(Context ctx){
Method m;
try {
BluetoothDevice devc = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(MAC_ADRS);
m = devc.getClass().getMethod("createRfcommSocket", new Class[]{int.class});
socket = (BluetoothSocket)m.invoke(devc, Integer.valueOf(1));
socket.connect();
String name = devc.getName();/* or */ String name2 = devc.getName().toString();
Log.i("Test","Name: "+name);
Log.i("Test","Name 2: "+name2);
return true;
}catch(Exception e)
{
return false;
}
}