public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }        public void endCall(View v) throws Exception {        //通过反射调用隐藏的API            //得到隐藏类的Class对象        Class c = Class.forName("android.os.ServiceManager");            //得到方法所对应的Method对象        Method method = c.getMethod("getService", String.class);            //调用方法        IBinder iBinder = (IBinder) method.invoke(null, Context.TELEPHONY_SERVICE);        //得到接口对象        ITelephony telephony = ITelephony.Stub.asInterface(iBinder);        //结束通话        telephony.endCall();    }}