Android 如何在 android.telecom.Call 类中反射 [英] Android how do to reflection in android.telecom.Call class

问题描述

我想阻止一个电话，我尝试使用带有以下代码的反射 android.telecom.Call 类，但该类没有构造函数.

I want to block a phone call and i try using reflection android.telecom.Call class with following code but this class does not has constructor .

try {
        Class c = Class.forName("android.telecom.Call");
        Method m = c.getMethod("disconnect");
        m.setAccessible(true);

        Object o = m.invoke(c, new Object[] {});

    } catch (Exception e) {
        Log.e("Exception of Reflection", e.getLocalizedMessage());
    }

推荐答案

1. 您需要实例化类调用，因为您将使用该实例作为您的目标 方法调用.
2. 方法 getMethod 忽略非公共方法.您应该使用 getDeclaredMethod 找到您的私有方法.

1. You need to instantiate Class Call because you'll use the instance as a target for you method invocation.
2. The method getMethod ignores non-public method. You should use getDeclaredMethod to find your private method.

您的代码可能如下所示:

Your code may look like this:

try
{
    Class<?> c = Class.forName("android.telecom.Call");
    Object instance = c.newInstance();
    Method m = c.getDeclaredMethod("disconnect");
    m.setAccessible(true);
    m.invoke(instance, new Object[] {});
}
catch (Exception e)
{
    Log.e("Exception of Reflection", e.getLocalizedMessage());
}

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