在frameworks中引用aar包的步骤(以我需要在PKMS中调用为例)：
1.在相应的目录中新建一个文件夹，存放test-debug.aar及Android.bp文件。
如我在\frameworks\base\services目录下新建一个文件夹：data_test，里面放test-debug.aar及Android.bp.
2.Android.bp中的内容
android_library_import {
name: "services.data_test",
aars: ["test-debug.aar"],
sdk_version: "current",
}
3.在\frameworks\base\services\Android.bp中添加services.data_test
// The convention is to name each service module 'services.$(module_name)'
static_libs: [
"services.core",
"services.accessibility",
"services.appwidget",
"services.autofill",
"services.backup",
"services.companion",
"services.coverage",
"services.devicepolicy",
"services.midi",
"services.net",
"services.print",
"services.restrictions",
"services.usage",
"services.usb",
"services.voiceinteraction",
"android.hidl.base-V1.0-java",
"services.data_test",
],
4.在需要引用的模块的Android.bp中添加services.data_test
如我需要在PackageManagerService.java中引用test-debug.aar，则需要在frameworks\base\services\core\Android.bp中添加:
libs: [
"services.net",
"android.hardware.light-V2.0-java",
"android.hardware.power-V1.0-java",
"android.hardware.tv.cec-V1.0-java",
"android.hidl.manager-V1.0-java",
"services.data_test",
],
(因为PackageManagerService.java在frameworks\base\services\core\java\com\android\server\pm目录下，离其最近的Android.bp中添加)
5.在PackageManagerService.java正常import及使用即可
import com.xxx.datatest.Mytest;//aar包中的包名
private void processPendingInstall(final InstallArgs args, final int currentStatus) {
// Queue up an async operation since the package installation may take a little while.
Log.d(TAG, "processPendingInstall ");
Mytest.initForFramework(mContext);
Mytest.hook("安装应用+1");
......
}
PS，也可以把test-debug.aar直接放置在\frameworks\base目录下。
步骤1需要做的修改是：在\frameworks\base目录下新建一个文件夹data_test，里面放test-debug.aar及Android.bp。
步骤2不需要修改，即Android.bp内容跟上面一样。
步骤3需要修改为在\frameworks\base\Android.bp中添加services.data_test：
static_libs: [
"framework-protos",
"android.hidl.base-V1.0-java",
"android.hardware.cas-V1.0-java",
"android.hardware.contexthub-V1.0-java",
"android.hardware.health-V1.0-java-constants",
"android.hardware.thermal-V1.0-java-constants",
"android.hardware.tv.input-V1.0-java-constants",
"android.hardware.usb-V1.0-java-constants",
"android.hardware.usb-V1.1-java-constants",
"android.hardware.vibrator-V1.0-java",
"android.hardware.vibrator-V1.1-java",
"android.hardware.vibrator-V1.2-java",
"android.hardware.wifi-V1.0-java-constants",
"android.hardware.radio-V1.0-java",
"android.hardware.usb.gadget-V1.0-java",
"services.data_test",
],
步骤4及步骤5不需要修改。