从源码编译Android系统的Java类库和JNI动态库的方法

  ├── Android.mk  └── src   └── com     └── lhw       └── framework         └── led           └── Led.java

package com.lhw.framework.led;  /**  * LED操作库  * @author Micky Liu  */ public class Led {      public boolean turnOn() {     return true;   }        public boolean turnOff() {     return true;   }   } 

LOCAL_PATH := $(call my-dir)  LOCAL_SRC_FILES   := $(call all-java-files-under, src) LOCAL_MODULE    := framework_led LOCAL_MODULE_TAGS  := framework_led  LOCAL_JAVA_LIBRARIES    := LOCAL_STATIC_JAVA_LIBRARIES :=  include $(BUILD_JAVA_LIBRARY) 

   mmm /home/administrator/workspace/android_test/framework_led

   Install: out/target/product/generic/system/framework/framework_led.jar    

├── jni│  ├── Android.mk│  └── led.c

#include <jni.h> #include <stdio.h>  jboolean Java_com_lhw_led_Led_turnOn(JNIEnv *env, jclass thiz) {   return JNI_TRUE; }  jboolean Java_com_lhw_led_LED_trunOff(JNIEnv *env, jclass thiz) {   return JNI_TRUE; } 

LOCAL_PATH := $(call my-dir)  LOCAL_SRC_FILES := led.c LOCAL_MODULE  := led_jni LOCAL_MODULE_TAGS    := led_jni  LOCAL_PRELINK_MODULE  := false LOCAL_SHARED_LIBRARIES := libc  include $(BUILD_SHARED_LIBRARY) 

  mmm /home/administrator/workspace/android_test/jni

  Install: out/target/product/generic/system/lib/led_jni.so