java Android 蓝牙 - 检测与设备的断开连接
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Android Bluetooth - detect a disconnection from a device
提问by user1528794
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:
我正在尝试捕获蓝牙设备断开连接意图过滤器。我在 onReceive 中添加了一个日志，但它永远不会到达它并且没有显示在 logcat 中。我怀疑问题出在我的 manifest.xml 配置上：
manifest:
显现：
<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:
MyReceiver 扩展了 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();
}
回答by Force
Use this code for receiving a disconnect (when Bluetooth is still turned on):
使用此代码接收断开连接（当蓝牙仍处于打开状态时）：
<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.
此外，您必须注册一个服务，然后为蓝牙状态更改注册广播接收器，以便您的应用程序知道蓝牙何时关闭并因此丢弃所有活动设备，因为当蓝牙关闭时您不会收到 ACL_DISCONNECT。
@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) {
[...]
回答by zee008
For new users. it will works . Your manifest file looks
对于新用户。它会起作用。你的清单文件看起来
<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
你的接收器看起来像
else if (intent.getAction().equals(`enter code here`
BluetoothDevice.ACTION_ACL_DISCONNECTED)) {
// connection lost
回答by dnkoutso
Try removing the <category .../>from the intent-filter and try again.
尝试<category .../>从意图过滤器中删除 ，然后重试。
回答by Kirill Lebedev
Try android.bluetooth.device.action.ACL_DISCONNECTED action in intent filter. It should solve your problem.
在意图过滤器中尝试 android.bluetooth.device.action.ACL_DISCONNECTED 操作。它应该可以解决您的问题。
