bluetooth

getBluetoothService called with no BluetoothManagerCallback

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By reading into the Android source code, it seems to be a warning you cannot do anything about. The source code shows that if you call BluetoothSocket#connect(); Then it will call BluetoothAdapter.getDefaultAdapter().getBluetoothService(null); The key here, is the null parameter that it passes in the above line. Due to this, there will be no callback, and … Read more

Android Bluetooth Example [closed]

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I have also used following link as others have suggested you for bluetooth communication. http://developer.android.com/guide/topics/connectivity/bluetooth.html The thing is all you need is a class BluetoothChatService.java this class has following threads: Accept Connecting Connected Now when you call start function of the BluetoothChatService like: mChatService.start(); It starts accept thread which means it will start looking for … Read more

Can an Android device act as an iBeacon?

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YES This is possible on Android 5+, and you can find open-source code for transmitting as a beacon in the Android Beacon Library. There is also a full-featured version of a beacon transmitter in the Beacon Scope app in the Google Play Store. Here’s an example of transmitting iBeacon with the Android Beacon Library: Beacon … Read more

Find all Bluetooth devices (headsets, phones etc) nearby, without forcing the devices in discoverable mode

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So, here’s all I found after reading blogs, threads, documentations, SO answers etc. regarding Android’s bluetooth discovery. Thought this might be useful to post my findings here. So before someone starts reading, I want to clarify that, I could not find any way to detect a bluetooth device nearby which is turned on but not … Read more

How to unpair bluetooth device using android 2.1 sdk

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Here’s how you unpair/remove a bonded device call this method where macAddress is the string of the mac address of the device..i.e. “00:02:00:A3:03:05” IBluetooth ib =getIBluetooth(); ib.removeBond(macAddress); To get the IBluetooth Object you need to go through a couple of steps create a package in your project called android.bluetooth create two files, IBluetooth.aidl and IBluetoothCallback.aidl … Read more

Bluetooth Connection failed “java.io.IOException: read failed, socket might closed or timeout, read ret: -1”

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In the constructor of BluetoothConnector.java, a list of uuidCandidates is passed. public BluetoothConnector(BluetoothDevice device, boolean secure, BluetoothAdapter adapter, List<UUID> uuidCandidates) { this.device = device; this.secure = secure; this.adapter = adapter; this.uuidCandidates = uuidCandidates; if (this.uuidCandidates == null || this.uuidCandidates.isEmpty()) { this.uuidCandidates = new ArrayList<UUID>(); this.uuidCandidates.add(UUID.fromString(“fa87c0d0-afac-11de-8a39-0800200c9a66”)); } } Have you passed it null? If yes,then try … Read more

How to send file from Android device to other device through Bluetooth by code

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Here is the code from which you can send file via bluetooth from android device to any device. btnOk.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { txtContent = (EditText)findViewById(R.id.txtContent); imageView = (ImageView)findViewById(R.id.imageView); linearLayout = (LinearLayout)findViewById(R.id.linearLayout); viewToBeConverted = (TextView) findViewById(R.id.hello); linearLayout.setDrawingCacheEnabled(true); //Toast.makeText(MainActivity.this, file.toString(), Toast.LENGTH_LONG).show(); try { if(file.exists()) { file.delete(); } out = new FileOutputStream(file); } … Read more