Question

ANSWER ：How to use Bluetooth in Android emulator?

我尝试启用禁用蓝牙设备。出于这个原因，我写了下面的代码，但它给出了错误，也在下面。

if ( bluetoothAdmin == null ) {

    return ;
}
if ( bluetooth . isEnabled()){
    bluetooth . disable ();
}
else {
    bluetooth . enable();
}

in on create

BLuetoothAdapter bluetooth = BluetoothAdapter.getDefaultAdapter() ;

在manisfest中

<uses-permission
    android:name="android.permission.BLUETOOTH" 
/>
<uses-permission
    android:name="android.permission.BLUETOOTH_ADMIN" 
/>

错误：

01-23 07:18:53.167: E/BluetoothAdapter(883): Bluetooth binder is null

堆栈的一半：

01-23 07:36:55.624: E/SurfaceFlinger(36): ro.sf.lcd_density must be defined as a build property
01-23 07:37:16.954: E/ActivityThread(642): Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d51230 that was originally bound here
01-23 07:37:16.954: E/ActivityThread(642): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d51230 that was originally bound here
01-23 07:37:16.954: E/ActivityThread(642):  at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:969)
01-23 07:37:16.954: E/ActivityThread(642):  at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863)
01-23 07:37:16.954: E/ActivityThread(642):  at android.app.ContextImpl.bindService(ContextImpl.java:1418)
01-23 07:37:16.954: E/ActivityThread(642):  at android.app.ContextImpl.bindService(ContextImpl.java:1407)
01-23 07:37:16.954: E/ActivityThread(642):  at android.content.ContextWrapper.bindService(ContextWrapper.java:473)
01-23 07:37:16.954: E/ActivityThread(642):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157)
01-23 07:37:16.954: E/ActivityThread(642):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:145)
01-23 07:37:16.954: E/ActivityThread(642):  at com.android.emailcommon.service.AccountServiceProxy.getDeviceId(AccountServiceProxy.java:11    6)
01-23 07:37:16.954: E/ActivityThread(642):  at com.android.exchange.ExchangeService.getDeviceId(ExchangeService.java:1249)
01-23 07:37:16.954: E/ActivityThread(642):  at com.android.exchange.ExchangeService$7.run(ExchangeService.java:1856)
01-23 07:37:16.954: E/ActivityThread(642):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:551)
01-23 07:37:16.954: E/ActivityThread(642):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:549)
01-23 07:37:16.954: E/ActivityThread(642):  at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-23 07:37:16.954: E/ActivityThread(642):  at java.util.concurrent.FutureTask.run(FutureTask.java:234)
01-23 07:37:16.954: E/ActivityThread(642):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
01-23 07:37:16.954: E/ActivityThread(642):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
01-23 07:37:16.954: E/ActivityThread(642):  at java.lang.Thread.run(Thread.java:856)
01-23 07:37:16.964: E/StrictMode(642): null
01-23 07:37:16.964: E/StrictMode(642): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d51230 that was originally bound here

我正在Android模拟器上进行测试

Answer 1

仿真器不支持sdk文档中提到的蓝牙。你必须在真实设备中检查这个..

你得到错误蓝牙绑定器为空。这意味着模拟器没有蓝牙功能。

Answer 2

Android模拟器不支持蓝牙。这就是你收到错误的原因。您可以使用连接到计算机/笔记本电脑的智能手机来测试您的应用程序。

Answer 3

由于您的帖子中缺少信息，我认为您的课程扩展了服务，因为这一行：

android.app.ServiceConnectionLeaked: Service

在onStop方法中，请从您的活动中取消绑定服务。

unbindService(whatever_your_service_object_are);

如果这是完全错误的答案，请发布更多代码，使用类声明等。

E / BluetoothAdapter（883）：蓝牙装订器为空

3 个答案: