android6.0系统缺少com.android.internal.policy.PolicyManager导致无法获取LayoutInflater实例问题

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问题出现原因:

插件技术动态加载View需要实例化一个LayoutInflater，但6.0以后com.android.internal.policy.PolicyManager被去除，导致插件view无法被创建，为了能让我的app能够在6.0系统上运行，我必须解决掉这个bug

解决办法:

搜素源码找到这个类：
https://android.googlesource.com/platform/frameworks/base/+/android-6.0.1_r25/core/java/com/android/internal/policy/PhoneLayoutInflater.java
可以通过实例化它取得LayoutInflater，具体代码如下:
博客出处

policyClass = Class.forName("com.android.internal.policy.PhoneLayoutInflater");
Constructor<?> localConstructor = policyClass.getConstructor(new Class[]{Context.class});
mLayoutInflater = (LayoutInflater) localConstructor.newInstance(new Object[]{context});

如果你的项目需要经过com.android.internal.policy.PolicyManager获取windows

Class windowClass = Class.forName("com.android.internal.policy.PhoneWindow");
Constructor<?> localConstructor = windowClass.getConstructor(new Class[]{Context.class});
Window windows = (Window) localConstructor.newInstance(new Object[]{getApplicationContext()});//实例化Window，如果传的context不是Application的Context,就会奔溃
Field field = windowClass.getDeclaredField("mLayoutInflater");
field.setAccessible(true);
mLayoutInflater = (LayoutInflater) field.get(windows);//取得Application的LayoutInflater，而不是插件的LayoutInflater//往windows设置插件的LayoutInflater
policyClass = ReflectUtil.getClass("com.android.internal.policy.PhoneLayoutInflater");
Constructor<?> policyLocalConstructor = policyClass.getConstructor(new Class[]{Context.class});
mLayoutInflater = (LayoutInflater) policyLocalConstructor.newInstance(new Object[]{this});
field.set(windows,mLayoutInflater);