河北云建站,网站设计行业现状,wordpress 下一篇样式,湖南长沙seoPlatform: RK3568 OS: Android 12.0 Kernel: 4.19
Rockchip默认提供了机制来预置第三方APK, 方法很简单#xff1a; 1. 在device/rockchip/rk3568创建preinstall目录(如果要可卸载#xff0c;那就创建preinstall_del目录) 2. 将你要预安装的APK放进此目录即可 preinstall 不…Platform: RK3568 OS: Android 12.0 Kernel: 4.19
Rockchip默认提供了机制来预置第三方APK, 方法很简单 1. 在device/rockchip/rk3568创建preinstall目录(如果要可卸载那就创建preinstall_del目录) 2. 将你要预安装的APK放进此目录即可 preinstall 不可卸载
preinstall_del 可卸载回复出厂可恢复
preinstall_del_forever 可卸载 恢复出厂不可恢复
下面看下实现原理过程 device/rockchip/common/device.mk中有
# Prebuild apps
$(call inherit-product, device/rockchip/common/modules/preinstall.mk) device\rockchip\common\modules\preinstall.mk
# Include this makefile to support prebuild apps
ifneq ($(strip $(TARGET_PRODUCT)), )$(shell python device/rockchip/common/auto_generator.py $(TARGET_DEVICE_DIR) preinstall bundled_persist-app $(TARGET_ARCH))$(shell python device/rockchip/common/auto_generator.py $(TARGET_DEVICE_DIR) preinstall_del bundled_uninstall_back-app $(TARGET_ARCH))$(shell python device/rockchip/common/auto_generator.py $(TARGET_DEVICE_DIR) preinstall_del_forever bundled_uninstall_gone-app $(TARGET_ARCH))-include $(TARGET_DEVICE_DIR)/preinstall/preinstall.mk-include $(TARGET_DEVICE_DIR)/preinstall_del/preinstall.mk-include $(TARGET_DEVICE_DIR)/preinstall_del_forever/preinstall.mk
endifauto_generator.py是个python脚本用于生成Android.mk和preinstall.mk文件
def main(argv): preinstall_dir os.path.join(argv[1] / argv[2]) if os.path.exists(preinstall_dir): #Use to define modules for install makefile_path preinstall_dir /Android.mk #Use to include modules include_path preinstall_dir /preinstall.mk if os.path.exists(makefile_path): os.remove(makefile_path) if os.path.exists(include_path): os.remove(include_path) makefile file(makefile_path, w) includefile file(include_path, w) makefile.write(LOCAL_PATH : $(my-dir)\n\n) for root, dirs, files in os.walk(preinstall_dir): for file_name in files: p re.compile(r\S*(?.apk\b)) found p.search(file_name) if found: makefile.write(templet %(found.group(), argv[2])) includefile.write(PRODUCT_PACKAGES %s\n %found.group()) makefile.close() includefile.close() Android.mk用于制定编译规则如我在preinstall目录下放了个AVSourceTester.apk那么生成的文件内容是
LOCAL_PATH : $(my-dir)
include $(CLEAR_VARS) LOCAL_MODULE : AVSourceTester LOCAL_MODULE_CLASS : APPS LOCAL_MODULE_PATH : $(TARGET_OUT)/preinstall LOCAL_SRC_FILES : $(LOCAL_MODULE)$(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_CERTIFICATE : PRESIGNED LOCAL_DEX_PREOPT : false LOCAL_MODULE_TAGS : optional LOCAL_MODULE_SUFFIX : $(COMMON_ANDROID_PACKAGE_SUFFIX) include $(BUILD_PREBUILT) preinstall.mk内容如下 PRODUCT_PACKAGES AVSourceTester
编译系统之后生成路径是 out/target/product/rk3568/system/preinstall/AVSourceTester/AVSourceTester.apk
系统开机之后会调用
frameworks\base\services\core\java\com\android\server\pm\PackageManagerService.java preinstallThirdPartyAPK(packageParser,executorService,scanFlags);
private void preinstallThirdPartyAPK(PackageParser2 packageParser, ExecutorService executorService,int scanFlags){preinstallPrebundledpersist(packageParser,executorService,scanFlags);preinstallPrebundledUninstallBack(packageParser,executorService,scanFlags);preinstallPrebundledUninstallGone(packageParser,executorService,scanFlags);}
private void preinstallPrebundledpersist(PackageParser2 packageParser, ExecutorService executorService,int scanFlags){scanDirTracedLI(new File(BUNDLED_PERSIST_DIR),mDefParseFlags | ParsingPackageUtils.PARSE_IS_SYSTEM_DIR| ParsingPackageUtils.PARSE_IS_PREINSTALL,scanFlags | SCAN_AS_PREINSTALL| SCAN_AS_SYSTEM,0,packageParser, executorService);}private void preinstallPrebundledUninstallBack(PackageParser2 packageParser, ExecutorService executorService,int scanFlags){scanDirTracedLI(Environment.getPrebundledUninstallBackDirectory(),mDefParseFlags | ParsingPackageUtils.PARSE_IS_PREBUNDLED_DIR,scanFlags | SCAN_AS_PREBUNDLED_DIR,0,packageParser, executorService);}private void preinstallPrebundledUninstallGone(PackageParser2 packageParser, ExecutorService executorService,int scanFlags){scanDirTracedLI(Environment.getPrebundledUninstallGoneDirectory(),mDefParseFlags | ParsingPackageUtils.PARSE_IS_PREBUNDLED_DIR,scanFlags | SCAN_AS_PREBUNDLED_DIR,0,packageParser, executorService);} private static final String BUNDLED_PERSIST_DIR /odm/bundled_persist-app;private static final String BUNDLED_UNINSTALL_GONE_DIR /odm/bundled_uninstall_gone-app; private void scanDirTracedLI(File scanDir, final int parseFlags, int scanFlags,long currentTime, PackageParser2 packageParser, ExecutorService executorService) {Trace.traceBegin(TRACE_TAG_PACKAGE_MANAGER, scanDir [ scanDir.getAbsolutePath() ]);try {scanDirLI(scanDir, parseFlags, scanFlags, currentTime, packageParser, executorService);} finally {Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);}}private void scanDirLI(File scanDir, int parseFlags, int scanFlags, long currentTime,PackageParser2 packageParser, ExecutorService executorService) {final File[] files scanDir.listFiles();if (ArrayUtils.isEmpty(files)) {Log.d(TAG, No files in app dir scanDir);return;}if (DEBUG_PACKAGE_SCANNING) {Log.d(TAG, Scanning app dir scanDir scanFlags scanFlags flags0x Integer.toHexString(parseFlags));}ArrayListString list new ArrayListString();boolean isPrebundled (parseFlags ParsingPackageUtils.PARSE_IS_PREBUNDLED_DIR) ! 0;if (isPrebundled) {synchronized (mPackages) {mSettings.readPrebundledPackagesLPr();}}if (scanDir.getAbsolutePath().contains(BUNDLED_UNINSTALL_GONE_DIR)) {if (!readDeleteFile(list)) {Log.e(TAG, read data failed);return;}}ParallelPackageParser parallelPackageParser new ParallelPackageParser(packageParser, executorService);// Submit files for parsing in parallelint fileCount 0;for (File file : files) {final boolean isPackage (isApkFile(file) || file.isDirectory()) !PackageInstallerService.isStageName(file.getName());if (!isPackage) {// Ignore entries which are not packagescontinue;}if (file.getAbsolutePath().contains(BUNDLED_UNINSTALL_GONE_DIR)) {if (list ! null list.size() 0) {final boolean isdeleteApk isDeleteApk(file,parseFlags,list);if (isdeleteApk) {// Ignore deleted bundled appscontinue;}}}parallelPackageParser.submit(file, parseFlags);fileCount;}// Process results one by onefor (; fileCount 0; fileCount--) {ParallelPackageParser.ParseResult parseResult parallelPackageParser.take();Throwable throwable parseResult.throwable;int errorCode PackageManager.INSTALL_SUCCEEDED;String errorMsg null;if (throwable null) {// TODO(toddke): move lower in the scan chain// Static shared libraries have synthetic package namesif (parseResult.parsedPackage.isStaticSharedLibrary()) {renameStaticSharedLibraryPackage(parseResult.parsedPackage);}try {addForInitLI(parseResult.parsedPackage, parseFlags, scanFlags,currentTime, null);if (isPrebundled) {final PackageParser.Package pkg;try {pkg new PackageParser().parsePackage(parseResult.scanFile, parseFlags);} catch (PackageParserException e) {throw PackageManagerException.from(e);}synchronized (mPackages) {mSettings.markPrebundledPackageInstalledLPr(pkg.packageName);}}} catch (PackageManagerException e) {errorCode e.error;errorMsg Failed to scan parseResult.scanFile : e.getMessage();Slog.w(TAG, errorMsg);}} else if (throwable instanceof PackageParserException) {PackageParserException e (PackageParserException)throwable;errorCode e.error;errorMsg Failed to parse parseResult.scanFile : e.getMessage();Slog.w(TAG, errorMsg);} else {throw new IllegalStateException(Unexpected exception occurred while parsing parseResult.scanFile, throwable);}if ((scanFlags SCAN_AS_APK_IN_APEX) ! 0 errorCode ! INSTALL_SUCCEEDED) {mApexManager.reportErrorWithApkInApex(scanDir.getAbsolutePath(), errorMsg);}// Delete invalid userdata appsif ((scanFlags SCAN_AS_SYSTEM) 0 errorCode ! PackageManager.INSTALL_SUCCEEDED) {logCriticalInfo(Log.WARN,Deleting invalid package at parseResult.scanFile);removeCodePathLI(parseResult.scanFile);}}if (isPrebundled) {synchronized (mPackages) {mSettings.writePrebundledPackagesLPr();}}} 关键函数是copyPackagesToAppInstallDir()它会把preinstall目录下的安装文件copy到安装目录。 这样安装就成功了。
安装preinstall和preinstall_del的区别在于后者在安装完之后会删除系统目录下的apk因此要是做了恢复出厂设置或者卸载动作那就不能恢复了。
删除函数是deletePreinstallDir(),通过init中的ctl命令实现。 private void deletePreinstallDir(File dir) { String[] files dir.list(); if (files ! null) { Slog.d(TAG, Ready to cleanup preinstall); SystemProperties.set(ctl.start, preinst_clr); } } 不过在source code中并没有找到preinst_clr这个service,可以在init.rc中自己添加下 参考的是 Nu3001/device_rockchip_rksdk
service preinst_clr /system/bin/preinstall_cleanup.sh disabled oneshot preinstall_cleanup.sh这个文件默认是有的本质是直接删除apk。
#!/system/bin/sh log -t PackageManager Start to clean up /system/preinstall_del/ mount -o rw,remount -t ext4 /system rm system/preinstall_del/*.* mount -o ro,remount -t ext4 /system
