Android 11 添加系统开机启动的Service方案

原创

已于 2022-03-23 18:29:29 修改 · 置顶 · 8.8k 阅读

15 ·

CC 4.0 BY-SA版权

文章标签：

#android #ServiceManager #SystemServer #开机启动服务 #AIDL

于 2022-03-16 16:21:00 首次发布

近日，在搞一套开机启动的Service，虽然在之前低版本弄过，以为直接照搬过来就可以了，结果还出了一堆问题，比如framework里边@NonNull检测、selinux新规则等等，废了本尊些许时日才完工～

且听我一一道来～～～～

首先，在Framework相关目录添加Service和aidl文件；

在frameworks/base/core/java/android/app/目录创建genie目录，新建如下两个文件：

GeniePadManager.java：

/**

* Pad manager

package android.app.genie;

import android.content.Context;

import android.os.RemoteException;

import android.util.Slog;

import android.annotation.NonNull;

public class GeniePadManager {

Context mContext;

IGeniePadManager mService;

static final String TAG = "GeniePadManager";

public GeniePadManager(@NonNull Context context, @NonNull IGeniePadManager service) {

mContext = context;

mService = service;

if (mService != null)

Slog.d(TAG, "====== mService not null");

else

Slog.d(TAG, "====== mService not null");

}

public @NonNull String getPadBrightness() {

if (mService != null) {

try {

//Slog.d(TAG, " Will return getPadBrightness");

return mService.getPadBrightness();

} catch (RemoteException e) {

Slog.d(TAG, "RemoteException " + e);

return null;

}

return null;

}

public @NonNull String getTpVersion() {

if (mService != null) {

try {

Slog.d(TAG, "====== Will return getTpVersion");

return mService.getTpVersion();

} catch (RemoteException e) {

Slog.d(TAG, "RemoteException " + e);

return null;

}

return null;

}

IGeniePadManager.aidl:

/**

* pad controller

package android.app.genie;

interface IGeniePadManager {

String getPadBrightness();

String getTpVersion();

}

第二步：执行一次make update-api，会遇到类似下边的报错日志：

1 new API lint issues were found. See tools/metalava/API-LINT.md for how to handle these.
/************************************************************
Your API changes are triggering API Lint warnings or errors. To make these errors go away, fix the code according to the error and/or warning messages above. it is not possible to do so, there are workarounds
1.You can suppress the errors with @SuppressLint("")
2.You can update the baseline by executing the following
command:
cp \
out/soong/.intermediates/frameworks/base/api-stubs-docs/android_common/api_lint_baseline.txt \
frameworks/base/api/lint-baseline.txt
To submit the revised baseline.txt to the main Android\n repository, you will need approval.
************************************************************/
这是Android的lint检查，之前的版本没有明显语法错误是不报错的，android11规范了这种语法，会报错，

假设报错提示为：