Android Bluetooth - detect a disconnection from a device
Solution 1
Use this code for receiving a disconnect (when Bluetooth is still turned on):
<intent-filter> <action android:name="android.bluetooth.device.action.ACL_CONNECTED" />
<action android:name="android.bluetooth.device.action.ACL_DISCONNECT_REQUESTED" />
<action android:name="android.bluetooth.device.action.ACL_DISCONNECTED" />
</intent-filter>
Also you have to register a service that then registers a broadcast receiver for Bluetooth status change, so your app knows when Bluetooth was turned off and therefore discards all active devices, as you won't receive a ACL_DISCONNECT when Bluetooth is simply turned off.
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
registerReceiver(bluetoothTurnedOnOff, filter);
return START_STICKY;
}
private final BroadcastReceiver bluetoothTurnedOnOff = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1) == BluetoothAdapter.STATE_OFF) {
[...]
Solution 2
For new users. it will works . Your manifest file looks
<receiver android:name="(package name).BluetoothReceiver" >
<intent-filter>
<action android:name="android.bluetooth.device.action.ACL_CONNECTED" />
<action android:name="android.bluetooth.device.action.ACL_DISCONNECTED" />
</intent-filter>
</receiver>
and your receiver will look like
else if (intent.getAction().equals(`enter code here`
BluetoothDevice.ACTION_ACL_DISCONNECTED)) {
// connection lost
Solution 3
Try removing the <category .../>
from the intent-filter and try again.
user1528794
Updated on June 10, 2022Comments
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user1528794 almost 2 years
I am trying to catch a bluetooth device disconnection intent filter. I added a log to the onReceive but it never reaches it and is not displayed in the logcat. I suspect that the problem is with my manifest.xml configuration:
manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.company" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="10" android:targetSdkVersion="16" /> <uses-permission android:name="android.permission.BLUETOOTH" /> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <receiver android:name="com.company.MyReceiver" android:enabled="true" android:exported="true"> <intent-filter> <category android:name="android.intent.category.DEFAULT" /> <action android:name="android.bluetooth.device.action.ACL_DISCONNECT_REQUESTED" /> <action android:name="android.bluetooth.adapter.action.CONNECTION_STATE_CHANGED" /> <action android:name="android.bluetooth.adapter.action.DISCOVERY_STARTED" /> </intent-filter> </receiver> <activity android:name=".BTActivity" android:label="BTActivity" > </activity> </application> </manifest>
MyReceiver extends BroadcastReceiver:
@Override public void onReceive(Context context, Intent intent) { Log.i("got-in", "got-in-"); // String action = intent.getAction(); BluetoothDevice device = intent .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); Log.i("disconnect", device.getName()); Intent i = new Intent(context, BTActivity.class); Bundle b = new Bundle(); b.putString("deviceName", device.getName()); intent.putExtras(b); // Put your id to your next Intent context.startActivity(i); // finish(); }