android– 如何通过反射使用BluetoothHeadset类

概述我想在Android2.0中使用BluetoothHeadset类的方法.这是我的代码：ClassbluetoothHeadsetClass=Class.forName("android.bluetooth.BluetoothHeadset");Constructorconstructor=bluetoothHeadsetClass.getConstructors()[0];ObjectbluetoothHeadset=constru

我想在Android 2.0中使用Bluetoothheadset类的方法.这是我的代码：

    Class bluetoothheadsetClass = Class.forname("androID.bluetooth.Bluetoothheadset");    Constructor constructor = bluetoothheadsetClass.getConstructors()[0];    Object bluetoothheadset = constructor.newInstance(this, null);    Method getState = bluetoothheadsetClass.getmethod("getState", null);    Object retVal = getState.invoke(bluetoothheadset, null);

执行此代码时,我总是收到日志消息：

10-12 13:29:48.360: WARN/Bluetoothheadset(3379): Proxy not attached to
service

我还试着在调用我的方法之前等待几秒钟,但它仍然是一样的.
感谢帮助！！！

解决方法:

这是我用反射做的方式.我还没有检查这段代码现在是否有效,所以它可能不是：

class Bluetoothheadset                      {    private static final String TAG = Tags.getTag(Bluetoothheadset.class);      private static final String BLUetoOTH_headSET_CLASS_name = "androID.bluetooth.IBluetoothheadset";    private static final String BLUetoOTH_headSET_STUB_CLASS_name = BLUetoOTH_headSET_CLASS_name+"$Stub";    public static final String ACTION_BLUetoOTH_headSET_SERVICE = BLUetoOTH_headSET_CLASS_name;     public static final String ACTION_STATE_CHANGED = "androID.bluetooth.headset.action.STATE_CHANGED";    public static final String ACTION_AUdio_STATE_CHANGED = "androID.bluetooth.headset.action.AUdio_STATE_CHANGED";    public static final String EXTRA_AUdio_STATE = "androID.bluetooth.headset.extra.AUdio_STATE";     /** A SCO audio channel is not established */    public static final int AUdio_STATE_disCONNECTED = 0;    /** A SCO audio channel is established */    public static final int AUdio_STATE_CONNECTED = 1;    private static final String AS_INTERFACE_METHOD_name = "asInterface";    private static final String IS_CONNECTED_METHOD_name = "isConnected";       final Object m_service;     private Bluetoothheadset(Object service)    {        m_service = service;    }    static public Bluetoothheadset getBluetoothheadset(IBinder service)    {        if (service == null)         {            return null;        }        Object proxy = null;        try        {            Class<?> clazz = Class.forname(BLUetoOTH_headSET_STUB_CLASS_name);            Method asInterfaceMethod = clazz.getmethod(AS_INTERFACE_METHOD_name, IBinder.class);            proxy = asInterfaceMethod.invoke(null, service);                    }        catch(ClassNotFoundException ex)        {            String msg = String.format("Was not able to find %s class.",                                         BLUetoOTH_headSET_STUB_CLASS_name);             Log.e(TAG, msg, ex);        }        catch(NoSuchMethodException ex)        {            String msg = String.format("Was not able to find %s method in %s class.",                                         AS_INTERFACE_METHOD_name,                                         BLUetoOTH_headSET_STUB_CLASS_name);            Log.e(TAG, msg, ex);        }               catch(InvocationTargetException ex)        {            String msg = String.format("Was not able to invoke %s method in %s class.",                                         AS_INTERFACE_METHOD_name,                                         BLUetoOTH_headSET_STUB_CLASS_name);            Log.e(TAG, msg, ex);        }        catch(illegalaccessexception ex)        {            String msg = String.format("Illegal access while invoking %s method in %s class.",                                         AS_INTERFACE_METHOD_name,                                         BLUetoOTH_headSET_STUB_CLASS_name);            Log.e(TAG, msg, ex);        }        if(proxy == null) return null;              return new Bluetoothheadset(proxy);    }    public Boolean isDeviceConnected(BluetoothDevice device)    {        //invoke: boolean isConnected(BluetoothDevice device);        try        {            Class<?> clazz = m_service.getClass();            Method isConnectedMethod = clazz.getmethod(IS_CONNECTED_METHOD_name, BluetoothDevice.class);            Object result = isConnectedMethod.invoke(m_service, device);            return (Boolean)result;        }        catch(NoSuchMethodException ex)        {            String msg = String.format("Failed to find %s method in class %s.",                                         IS_CONNECTED_METHOD_name, m_service.getClass().getname());            Log.e(TAG, msg, ex);        }        catch(InvocationTargetException ex)        {            String msg = String.format("Failed to invoke %s method in class %s.",                                         IS_CONNECTED_METHOD_name, m_service.getClass().getname());            Log.e(TAG, msg, ex);        }           catch(illegalaccessexception ex)        {            String msg = String.format("Illegal access when invoking %s method in class %s.",                                         IS_CONNECTED_METHOD_name, m_service.getClass().getname());                      Log.e(TAG, msg, ex);        }        catch(Exception ex)        {            Log.e(TAG, "UnkNown exception was thrown.", ex);        }        return null;    }   }

总结

以上是内存溢出为你收集整理的android – 如何通过反射使用BluetoothHeadset类全部内容，希望文章能够帮你解决android – 如何通过反射使用BluetoothHeadset类所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。