Android 定期打开和关闭蓝牙_Android_Bluetooth

Android 定期打开和关闭蓝牙

android bluetooth

Android 定期打开和关闭蓝牙,android,bluetooth,Android,Bluetooth,我有一个可以查看手机配对设备的应用程序我有它，以便蓝牙打开。但当我把它放在等待中时，每次我打开它，它都会灰飞烟灭我怎么能让它每5分钟打开一分钟，或者类似的。只有当它没有连接到任何东西时才会关闭任何帮助都会很好。谢谢代码 private void turnOnBt() { //Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); //startActivityForResult(intent

我有一个可以查看手机配对设备的应用程序

我有它，以便蓝牙打开。但当我把它放在等待中时，每次我打开它，它都会灰飞烟灭

我怎么能让它每5分钟打开一分钟，或者类似的。只有当它没有连接到任何东西时才会关闭

任何帮助都会很好。谢谢

代码

private void turnOnBt() {
    //Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    //startActivityForResult(intent, 1);
    BluetoothAdapter.getDefaultAdapter().enable();  
    try {
        wait(15000);
        notify();
        BluetoothAdapter.getDefaultAdapter().disable();
        wait(60000);
        notify();
        //BluetoothAdapter.getDefaultAdapter().enable();
        //Toast.makeText(getApplicationContext(), "Bluetooth restarted", 0).show();
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

private void getPairedDevices() {
    // TODO Auto-generated method stub
    devicesArray = btAdapter.getBondedDevices();
    if(devicesArray.size()>0){
        for(BluetoothDevice device:devicesArray){
            pairedDevices.add(device.getName());
        }
    }
}

成对代码

private void turnOnBt() {
    //Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    //startActivityForResult(intent, 1);
    BluetoothAdapter.getDefaultAdapter().enable();  
    try {
        wait(15000);
        notify();
        BluetoothAdapter.getDefaultAdapter().disable();
        wait(60000);
        notify();
        //BluetoothAdapter.getDefaultAdapter().enable();
        //Toast.makeText(getApplicationContext(), "Bluetooth restarted", 0).show();
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

private void getPairedDevices() {
    // TODO Auto-generated method stub
    devicesArray = btAdapter.getBondedDevices();
    if(devicesArray.size()>0){
        for(BluetoothDevice device:devicesArray){
            pairedDevices.add(device.getName());
        }
    }
}

LogCat

02-21 13:10:18.559: D/TextLayoutCache(25101): Using debug level: 0 - Debug Enabled: 0
02-21 13:10:18.589: D/libEGL(25101): loaded /system/lib/egl/libGLES_android.so
02-21 13:10:18.609: D/libEGL(25101): loaded /system/lib/egl/libEGL_adreno200.so
02-21 13:10:18.639: D/libEGL(25101): loaded /system/lib/egl/libGLESv1_CM_adreno200.so
02-21 13:10:18.639: D/libEGL(25101): loaded /system/lib/egl/libGLESv2_adreno200.so
02-21 13:10:19.329: D/OpenGLRenderer(25101): Enabling debug mode 0
02-21 13:13:07.819: D/TextLayoutCache(25306): Using debug level: 0 - Debug Enabled: 0
02-21 13:13:07.839: D/libEGL(25306): loaded /system/lib/egl/libGLES_android.so
02-21 13:13:07.849: D/libEGL(25306): loaded /system/lib/egl/libEGL_adreno200.so
02-21 13:13:07.869: D/libEGL(25306): loaded /system/lib/egl/libGLESv1_CM_adreno200.so
02-21 13:13:07.869: D/libEGL(25306): loaded /system/lib/egl/libGLESv2_adreno200.so
02-21 13:13:07.969: D/OpenGLRenderer(25306): Enabling debug mode 0
02-21 13:16:42.419: D/AndroidRuntime(25750): Shutting down VM
02-21 13:16:42.419: W/dalvikvm(25750): threadid=1: thread exiting with uncaught exception (group=0x2b542210)
02-21 13:16:42.439: E/AndroidRuntime(25750): FATAL EXCEPTION: main
02-21 13:16:42.439: E/AndroidRuntime(25750): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.Test.bluetooth/com.Test.bluetooth.MainActivity}: java.lang.IllegalMonitorStateException: object not locked by thread before wait()
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread.access$600(ActivityThread.java:127)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.os.Handler.dispatchMessage(Handler.java:99)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.os.Looper.loop(Looper.java:137)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread.main(ActivityThread.java:4441)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at java.lang.reflect.Method.invokeNative(Native Method)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at java.lang.reflect.Method.invoke(Method.java:511)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at dalvik.system.NativeStart.main(Native Method)
02-21 13:16:42.439: E/AndroidRuntime(25750): Caused by: java.lang.IllegalMonitorStateException: object not locked by thread before wait()
02-21 13:16:42.439: E/AndroidRuntime(25750):    at java.lang.Object.wait(Native Method)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at java.lang.Object.wait(Object.java:401)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at com.Test.bluetooth.MainActivity.turnOnBt(MainActivity.java:92)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at com.Test.bluetooth.MainActivity.onCreate(MainActivity.java:76)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.Activity.performCreate(Activity.java:4465)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
02-21 13:16:42.439: E/AndroidRuntime(25750):    ... 11 more

02-21 13:47:30.079: D/AndroidRuntime(27230): Shutting down VM
02-21 13:47:30.079: W/dalvikvm(27230): threadid=1: thread exiting with uncaught exception (group=0x2b542210)
02-21 13:47:30.089: E/AndroidRuntime(27230): FATAL EXCEPTION: main
02-21 13:47:30.089: E/AndroidRuntime(27230): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.bluetooth.device.action.FOUND flg=0x10 (has extras) } in com.Test.bluetooth.MainActivity$3@2be07420
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:737)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.os.Handler.handleCallback(Handler.java:605)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.os.Handler.dispatchMessage(Handler.java:92)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.os.Looper.loop(Looper.java:137)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.app.ActivityThread.main(ActivityThread.java:4441)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at java.lang.reflect.Method.invokeNative(Native Method)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at java.lang.reflect.Method.invoke(Method.java:511)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at dalvik.system.NativeStart.main(Native Method)
02-21 13:47:30.089: E/AndroidRuntime(27230): Caused by: java.lang.NullPointerException
02-21 13:47:30.089: E/AndroidRuntime(27230):    at com.Test.bluetooth.MainActivity$3.onReceive(MainActivity.java:137)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
02-21 13:47:30.089: E/AndroidRuntime(27230):    ... 9 more

第二个Logcat

02-21 13:10:18.559: D/TextLayoutCache(25101): Using debug level: 0 - Debug Enabled: 0
02-21 13:10:18.589: D/libEGL(25101): loaded /system/lib/egl/libGLES_android.so
02-21 13:10:18.609: D/libEGL(25101): loaded /system/lib/egl/libEGL_adreno200.so
02-21 13:10:18.639: D/libEGL(25101): loaded /system/lib/egl/libGLESv1_CM_adreno200.so
02-21 13:10:18.639: D/libEGL(25101): loaded /system/lib/egl/libGLESv2_adreno200.so
02-21 13:10:19.329: D/OpenGLRenderer(25101): Enabling debug mode 0
02-21 13:13:07.819: D/TextLayoutCache(25306): Using debug level: 0 - Debug Enabled: 0
02-21 13:13:07.839: D/libEGL(25306): loaded /system/lib/egl/libGLES_android.so
02-21 13:13:07.849: D/libEGL(25306): loaded /system/lib/egl/libEGL_adreno200.so
02-21 13:13:07.869: D/libEGL(25306): loaded /system/lib/egl/libGLESv1_CM_adreno200.so
02-21 13:13:07.869: D/libEGL(25306): loaded /system/lib/egl/libGLESv2_adreno200.so
02-21 13:13:07.969: D/OpenGLRenderer(25306): Enabling debug mode 0
02-21 13:16:42.419: D/AndroidRuntime(25750): Shutting down VM
02-21 13:16:42.419: W/dalvikvm(25750): threadid=1: thread exiting with uncaught exception (group=0x2b542210)
02-21 13:16:42.439: E/AndroidRuntime(25750): FATAL EXCEPTION: main
02-21 13:16:42.439: E/AndroidRuntime(25750): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.Test.bluetooth/com.Test.bluetooth.MainActivity}: java.lang.IllegalMonitorStateException: object not locked by thread before wait()
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread.access$600(ActivityThread.java:127)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.os.Handler.dispatchMessage(Handler.java:99)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.os.Looper.loop(Looper.java:137)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread.main(ActivityThread.java:4441)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at java.lang.reflect.Method.invokeNative(Native Method)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at java.lang.reflect.Method.invoke(Method.java:511)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at dalvik.system.NativeStart.main(Native Method)
02-21 13:16:42.439: E/AndroidRuntime(25750): Caused by: java.lang.IllegalMonitorStateException: object not locked by thread before wait()
02-21 13:16:42.439: E/AndroidRuntime(25750):    at java.lang.Object.wait(Native Method)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at java.lang.Object.wait(Object.java:401)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at com.Test.bluetooth.MainActivity.turnOnBt(MainActivity.java:92)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at com.Test.bluetooth.MainActivity.onCreate(MainActivity.java:76)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.Activity.performCreate(Activity.java:4465)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
02-21 13:16:42.439: E/AndroidRuntime(25750):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
02-21 13:16:42.439: E/AndroidRuntime(25750):    ... 11 more

02-21 13:47:30.079: D/AndroidRuntime(27230): Shutting down VM
02-21 13:47:30.079: W/dalvikvm(27230): threadid=1: thread exiting with uncaught exception (group=0x2b542210)
02-21 13:47:30.089: E/AndroidRuntime(27230): FATAL EXCEPTION: main
02-21 13:47:30.089: E/AndroidRuntime(27230): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.bluetooth.device.action.FOUND flg=0x10 (has extras) } in com.Test.bluetooth.MainActivity$3@2be07420
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:737)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.os.Handler.handleCallback(Handler.java:605)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.os.Handler.dispatchMessage(Handler.java:92)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.os.Looper.loop(Looper.java:137)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.app.ActivityThread.main(ActivityThread.java:4441)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at java.lang.reflect.Method.invokeNative(Native Method)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at java.lang.reflect.Method.invoke(Method.java:511)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at dalvik.system.NativeStart.main(Native Method)
02-21 13:47:30.089: E/AndroidRuntime(27230): Caused by: java.lang.NullPointerException
02-21 13:47:30.089: E/AndroidRuntime(27230):    at com.Test.bluetooth.MainActivity$3.onReceive(MainActivity.java:137)
02-21 13:47:30.089: E/AndroidRuntime(27230):    at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728)
02-21 13:47:30.089: E/AndroidRuntime(27230):    ... 9 more

发布日志猫错误

另外，在查看配对设备后，为什么要关闭整个适配器…记住对.enable（）和.disable（）的调用是在用户界面响应后完成的

在没有任何用户输入的情况下，决不能编程！如果我连接了另一个设备，例如耳机，该怎么办？看更多

我知道如果适配器未启用，您将无法获得配对设备，但仍然

在您的

MainActivitiy:：turnOnBt（）方法中-这是引发异常的地方，您可以调用Thread.wait（）（预设在第92行）
我不太确定你想用它实现什么，因为在UI线程上调用wait（）
，会（我很确定）让你的应用程序崩溃
调用Thread.wait（）必须在同步块中执行此操作：
synchronized(this) {
    try {
        Thread.wait();
    }
    catch(InterruptedException e) {
    }
}

但正如我所说，这不是你想要的。你把Thread.wait（）
和Thread.sleep（…）混在一起了吗？事件，然后在UI线程上调用Thread.sleep（…）
。
@ELSheepO Ok，现在发布新错误。另外，还有一个简单的更改：创建一个名为BluetoothAdapter myAdapter=getDefault…bla bla的对象。检查它是否为null，然后从那时起在代码中使用它。第二件事，为硬件事件注册一个接收器。比如BT关机，开机，等等，然后检查你是否得到了这些。请参阅@ELSheepO为什么仍在尝试重置适配器？你知道你正在打破编码规则，你的用户也会得到一个奇怪的和被黑客攻击的用户体验吗@ELSheepO打开适配器不会耗尽电池电量！所以这个借口是无效的！你是否做了索赔背后的测试？我有，这没有意义。GPS耗尽了它，BT不多，每天5%。@ELSheepO你似乎每次都在搜索BT设备，而不是查看已经配对的设备列表。这就是为什么你需要启用BT适配器…所以你总是在寻找车载套件或其他东西…它可能不是你的设备，否则你可以连接到它，然后断开连接，你就会知道用户离开了汽车…仍然请不要使用BT适配器…@ELSheepO，因此错误出现在你活动的onReceive方法上。当你收到一个发现设备的意图时，就会发生这种情况。我正试图让它在关闭蓝牙之前等待。第92行是我的wait（15000）
。如果我同步的方法，它应该工作是什么你说？