Android 我无法按程序断开电话

我想在单击其他呼叫应用程序上的按钮时断开呼叫，但在中单击断开按钮时会引发异常…以下是我的代码： 主要活动：

private void DisconnectOnGoingCall()  {
        try{
            TelephonyManager telephonyManager = (TelephonyManager)getSystemService(TELEPHONY_SERVICE);
            Class clazz = null;
            try {
                clazz = Class.forName(telephonyManager.getClass().getName());
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
            Method method = null;
            try {
                method = clazz.getDeclaredMethod("getITelephony");
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            }
            method.setAccessible(true);
            ITelephony telephonyService = null;
            try {
                telephonyService = (ITelephony) method.invoke(telephonyManager);
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            }
            telephonyService.endCall();
        }catch (NullPointerException ignored){
        } 

ITelephony：

public interface ITelephony {
    boolean endCall();
}

Logcat中生成的错误：

java.lang.ClassCastException: com.android.internal.telephony.ITelephony$Stub$Proxy cannot be cast to com.android.internal.smart_dectector.ITelephony
        at com.android.internal.smart_dectector.MainActivity.DisconnectOnGoingCall(MainActivity.java:57)