Android的蓝牙 - 从设备检测到断线 [英] Android Bluetooth - detect a disconnection from a device

问题描述

我想抓住一个蓝牙设备断开连接的意图过滤器。 我添加了一个记录到的onReceive但它永远不会达到它并没有在logcat中显示。 我怀疑，问题是我的manifest.xml配置：

清单：

 ＆LT;舱单的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    包=com.company
    安卓版code =1
    机器人：VERSIONNAME =1.0＆GT;

    ＆LT;用途-SDK
        安卓的minSdkVersion =10
        机器人：targetSdkVersion =16/＆GT;

    ＆LT;使用-权限的Andr​​oid：名称=android.permission.BLUETOOTH/＆GT;
    ＆LT;使用-权限的Andr​​oid：名称=android.permission.BLUETOOTH_ADMIN/＆GT;

    ＆lt;应用
        机器人：图标=@可绘制/ ic_launcher
        机器人：标签=@字符串/ APP_NAME
        机器人：主题=@风格/ AppTheme＆GT;
        ＆LT;接收器的Andr​​oid版本：NAME =com.company.MyReceiver机器人：启用=真正的机器人：出口=真正的＆GT;
            ＆LT;意向滤光器＆gt;
                ＆LT;类机器人：名称=android.intent.category.DEFAULT/＆GT;
                ＆lt;作用机器人：名称=android.bluetooth.device.action.ACL_DISCONNECT_REQUESTED/＆GT;
                ＆lt;作用机器人：名称=android.bluetooth.adapter.action.CONNECTION_STATE_CHANGED/＆GT;
                ＆lt;作用机器人：名称=android.bluetooth.adapter.action.DISCOVERY_STARTED/＆GT;
            ＆所述; /意图滤光器＆gt;
        ＆LT; /接收器＆GT;

        ＆LT;活动
            机器人：名称=。BTActivity
            机器人：标签=BTActivity＆GT;
        ＆LT; /活性GT;
    ＆LT; /用途＆gt;

＆LT; /舱单＆GT;
 

MyReceiver延伸BroadcastReceiver的：

  @覆盖
    公共无效的onReceive（上下文的背景下，意图意图）{
        Log.i（得到式，得到-IN-）;
        //串动= intent.getAction（）;
        BluetoothDevice类设备=意图
                .getParcelableExtra（BluetoothDevice.EXTRA_DEVICE）;

        Log.i（断开，device.getName（））;
        意图I =新的意图（背景下，BTActivity.class）;
        叠B =新包（）;
        b.putString（DEVICENAME，device.getName（））;
        intent.putExtras（B）; //把你的身份证给你的下一个意向
        context.startActivity（ⅰ）;
        // 完（）;

    }
 

解决方案

使用这种code，用以接收断开（Bluetooth时仍是打开的）：

 ＆LT;意向滤光器＆gt; ＆lt;作用机器人：名称=android.bluetooth.device.action.ACL_CONNECTED/＆GT;
    ＆lt;作用机器人：名称=android.bluetooth.device.action.ACL_DISCONNECT_REQUESTED/＆GT;
    ＆lt;作用机器人：名称=android.bluetooth.device.action.ACL_DISCONNECTED/＆GT;
＆所述; /意图滤光器＆gt;
 

你也需要注册一个然后注册一个广播接收器的蓝牙状态变化的服务，让您的应用程序知道，当蓝牙被关闭，因此放弃所有的有源器件，因为您将不会收到ACL_DISCONNECT当蓝牙只是把关闭。

  @覆盖
    公众诠释onStartCommand（意向意图，诠释标志，诠释startId）{

    IntentFilter的过滤器=新的IntentFilter（）;
    filter.addAction（BluetoothAdapter.ACTION_STATE_CHANGED）;
    registerReceiver（bluetoothTurnedOnOff，过滤器）;
    返回START_STICKY;
}

私人最终的BroadcastReceiver bluetoothTurnedOnOff =新的BroadcastReceiver（）{
    @覆盖
    公共无效的onReceive（上下文的背景下，意图意图）{
        如果（intent.getIntExtra（BluetoothAdapter.EXTRA_STATE，-1）== BluetoothAdapter.STATE_OFF）{
 [...]
 

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();

    }

解决方案

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) {
 [...]

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