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以上图示是android8以上的，主要跟Android8之前的架构在于Bluetooth stack跟vendor层之间增加一层HIDL，主要是抽象硬件层的作用 OK，回归主题，我们来看下Android的enable流程，首先上一张架构图 另外声明下：我们做了一些列的蓝牙教程(包括视频)。我们会以连载的方式 ...

为了更好的理解安卓的层次关系，本文在RK3399的安卓系统上增加LED灯的外设，并使用APP打开关闭LED灯。以这样一个最简单的实例，来演示从上层到底层的调用过程。首先从最底层的kernel层开始。 一、驱动开发 Kernel层就是要将LED硬件接入到系统，完成驱动的开发。

I would like to have some JNI code malloc a block of memory and pass it back to my Java code (in the form of a jlong), so that future calls to other JNI functions can pass this pointer along for the ...