packageinstaller.apk_secsettings.apk_packageinstaller 5.1(3)

（3）加载系统system/framework下的jar包

				// 以下加载system/framework中的各种jar包----------------------
				String bootClassPath = System
						.getProperty("java.boot.class.path");
				if (bootClassPath != null) {
					String[] paths = splitString(bootClassPath, :);
					for (int i = 0; i < paths.length; i++) {
						try {
							if (dalvik.system.DexFile.isDexOptNeeded(paths[i])) {
								libFiles.add(paths[i]);
								mInstaller.dexopt(paths[i], Process.SYSTEM_UID,
										true);
								didDexOpt = true;
							}
						} catch (FileNotFoundException e) {
							Slog.w(TAG, "Boot class path not found: "
									+ paths[i]);
						} catch (IOException e) {
							Slog.w(TAG,
									"Cannot dexopt " + paths[i]
											+ "; is it an APK or JAR? "
											+ e.getMessage());
						}
					}
				} else {
					Slog.w(TAG, "No BOOTCLASSPATH found!");
				}

				mFrameworkInstallObserver = new AppDirObserver(
						mFrameworkDir.getPath(), OBSERVER_EVENTS, true);
				// 为该目录添加，如果有文件被添加进来就
				mFrameworkInstallObserver.startWatching();
				// 扫描system/framework下的apk
				scanDirLI(mFrameworkDir, PackageParser.PARSE_IS_SYSTEM
						| PackageParser.PARSE_IS_SYSTEM_DIR, scanMode
						| SCAN_NO_DEX, 0);

				// Collect all system packages.
				mSystemAppDir = new File(Environment.getRootDirectory(), "app");
				// 添加
				mSystemInstallObserver = new AppDirObserver(
						mSystemAppDir.getPath(), OBSERVER_EVENTS, true);
				mSystemInstallObserver.startWatching();
				// 扫描system/app目录下的apk
				scanDirLI(mSystemAppDir, PackageParser.PARSE_IS_SYSTEM
						| PackageParser.PARSE_IS_SYSTEM_DIR, scanMode, 0);

				// Collect all vendor packages.
				mVendorAppDir = new File("/vendor/app");
				mVendorInstallObserver = new AppDirObserver(
						mVendorAppDir.getPath(), OBSERVER_EVENTS, true);
				mVendorInstallObserver.startWatching();

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