移植 android studio app 到 android.

1, Android studio
首先第一步应该是app 在studio 完成，依赖的库，也可以通过studio自动下载，在studio 也可以使用签名，进行release 版本发布，调试
2， Android.mk
在android stuido 终究是不方便的，如果做系统， apk release 然后才能anroid版本release ,如果apk 进行mm build ,在build 系统的时候就进行build release 方便

因此在做到系统里面之前，可以写Android.mk , 依赖现有的Android studio 路径，文件的存放位置，进行build，这样也可以进行android studio build, 做到了兼容。

3， Studio 到mk
Android studio version：3.5.3， jdk 1.8, 下图标红位置，是添加文件

图片.png

gradle：app/build.gradle, 依赖的库

dependencies {
   implementation fileTree(dir: 'libs', include: ['*.jar'])

   implementation 'androidx.appcompat:appcompat:1.1.0'
   implementation 'com.android.support:support-v13:28.0.0'
   implementation 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.0'
   implementation 'org.eclipse.paho:org.eclipse.paho.android.service:1.1.1'
   implementation 'com.google.protobuf:protobuf-java:3.6.1'

   testImplementation 'junit:junit:4.12'
   androidTestImplementation 'androidx.test.ext:junit:1.1.1'
   androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

由于系统中使用第三方库，因此需要在Android Studio 中查找对应的jar 包

图片.png

其他jar 类似地方找，org.eclipse.paho.client.mqttv3-1.2.0-source.jar ： 这种命名的是source 文件，不是import 需要的jar 包。

下面看mk 文件：

LOCAL_PATH := $(call my-dir)

# Java ai.test library
# =======================================================
include $(CLEAR_VARS)
LOCAL_MODULE := ai.test
LOCAL_MODULE_TAGS := optional
LOCAL_STATIC_JAVA_LIBRARIES :=com.google.protobuf
LOCAL_SRC_FILES := $(call all-java-files-under, app/build/generated/source/proto/release/java/ai/test)
LOCAL_JAVA_LANGUAGE_VERSION := 1.8
include $(BUILD_STATIC_JAVA_LIBRARY)

# Java ai.boxinfo library
# =======================================================
include $(CLEAR_VARS)
LOCAL_MODULE := ai.boxinfo
LOCAL_MODULE_TAGS := optional
LOCAL_STATIC_JAVA_LIBRARIES :=com.google.protobuf
LOCAL_SRC_FILES := $(call all-java-files-under, app/build/generated/source/proto/release/java/ai/boxinfo)
LOCAL_JAVA_LANGUAGE_VERSION := 1.8
include $(BUILD_STATIC_JAVA_LIBRARY)

# Java ai.boxcrash library
# =======================================================
include $(CLEAR_VARS)
LOCAL_MODULE := ai.boxcrash
LOCAL_MODULE_TAGS := optional
LOCAL_STATIC_JAVA_LIBRARIES :=com.google.protobuf
LOCAL_SRC_FILES := $(call all-java-files-under, app/build/generated/source/proto/release/java/ai/boxcrash)
LOCAL_JAVA_LANGUAGE_VERSION := 1.8
include $(BUILD_STATIC_JAVA_LIBRARY)

# apk build
# =======================================================
include $(CLEAR_VARS)
#eng, user, userdebug. optional build all version
LOCAL_MODULE_TAGS   := optional
LOCAL_SRC_FILES := $(call all-java-files-under, app/src/main/java)
LOCAL_MANIFEST_FILE := app/src/main/AndroidManifest.xml
LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/app/src/main/res

#apk setting
LOCAL_PACKAGE_NAME := MqttApp
LOCAL_CERTIFICATE := platform
LOCAL_DEX_PREOPT := false

# add static java jar
LOCAL_STATIC_JAVA_LIBRARIES :=android-common  guava
LOCAL_STATIC_JAVA_LIBRARIES +=org.eclipse.paho.client.mqttv3
LOCAL_STATIC_JAVA_LIBRARIES +=org.eclipse.paho.android.service
LOCAL_STATIC_JAVA_LIBRARIES +=android-support-v13
LOCAL_STATIC_JAVA_LIBRARIES +=androidx.annotation
LOCAL_STATIC_JAVA_LIBRARIES +=ai.test
LOCAL_STATIC_JAVA_LIBRARIES +=ai.boxinfo
LOCAL_STATIC_JAVA_LIBRARIES +=ai.boxcrash

include $(BUILD_PACKAGE)
include $(CLEAR_VARS)
include $(call all-makefiles-under,$(LOCAL_PATH))

# prebuild jar form third partment
#######################################
include $(CLEAR_VARS)
#before ':' is jar alias, after ':'is jar file path
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := androidx.annotation:libs/annotation-1.1.0.jar
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES += org.eclipse.paho.client.mqttv3:libs/org.eclipse.paho.client.mqttv3-1.2.0.jar
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES += org.eclipse.paho.android.service:libs/org.eclipse.paho.android.service-1.1.1.jar
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES += com.google.protobuf:libs/protobuf-java-3.6.1.jar
include $(BUILD_MULTI_PREBUILT)
#######################################

有上面的apk 可以看出，引用第三方库位置:libs/ 下面，引用方法：

图片.png

备注：上面的写法中，引用的ai.test jar 包， 是Android.mk build 出的。 在build ai.test 中 引用了地方三库， 引用方法：LOCAL_STATIC_JAVA_LIBRARIES :=com.google.protobuf

Reference:
https://blog.csdn.net/yuanhcn/article/details/52239558
https://blog.csdn.net/dzy_mails/article/details/51909112
https://www.xuebuyuan.com/2038942.html