了解apk安装流程的都知道apk的安装主要涉及的frameworks层下的PackageManagerService.java类的installPackageLI方法。
找到，添加，本例以6个为例：
try (PackageFreezer freezer = freezePackageForInstall(pkgName, installFlags, "installPackageLI")) { if (replace) { if (pkg.applicationInfo.isStaticSharedLibrary()) { // Static libs have a synthetic package name containing the version // and cannot be updated as an update would get a new package name, // unless this is the exact same version code which is useful for // development. PackageParser.Package existingPkg = mPackages.get(pkg.packageName); if (existingPkg != null && existingPkg.mVersionCode != pkg.mVersionCode) { res.setError(INSTALL_FAILED_DUPLICATE_PACKAGE, "Packages declaring " + "static-shared libs cannot be updated"); return; } } replacePackageLIF(pkg, parseFlags, scanFlags | SCAN_REPLACING, args.user, installerPackageName, res, args.installReason); } else { //Slog.d(TAG,"-----installNewPackage----"); /*-------------------add start-------------------------------*/ int dataAppSize = 0; int size = mPackages.size(); for(int i = 0;i<mPackages.size();i++){ String pkgNamei = mPackages.keyAt(i); //Slog.d(TAG,"----pkgNamei:"+pkgNamei); PackageSetting ps = mSettings.mPackages.get(pkgNamei); if (ps.pkg != null && ps.pkg.applicationInfo != null) { if((ps.pkg.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0){ //data dataAppSize = dataAppSize + 1; //Slog.d(TAG,"-----installNewPackage----dataAppSize:"+dataAppSize); if(dataAppSize >= 6){ //mContext.sendBroadcast(new Intent("com.action.installapp.limt")); Toast.makeText(mContext, "The number of APP has reached the upper limit.", Toast.LENGTH_LONG).show(); res.setError(INSTALL_FAILED_INSTANT_APP_INVALID, "The number of APP has reached the upper limit."); return; } } } } /*--------------------- add end-----------------------------*/ installNewPackageLIF(pkg, parseFlags, scanFlags | SCAN_DELETE_DATA_ON_FAILURES, args.user, installerPackageName, volumeUuid, res, args.installReason); } }
参考：https://blog.csdn.net/xl19862005/article/details/52102295
