Verification功能的出现将打乱图4-10的工作流程，所以这部分内容要放在最后来介绍。其代码在InstallParams的handleStartCopy中，如下所示： **PackageManagerService.java::InstallParams.handleStartCopy函数** ~~~ ......//此处已经获得了合适的安装位置 finalInstallArgs args = createInstallArgs(this); mArgs =args; if (ret == PackageManager.INSTALL_SUCCEEDED) { final int requiredUid =mRequiredVerifierPackage == null ? -1 :getPackageUid(mRequiredVerifierPackage); if (requiredUid != -1 &&isVerificationEnabled()) { //创建一个Intent，用于查找满足条件的广播接收者 finalIntent verification = new Intent(Intent.ACTION_PACKAGE_NEEDS_VERIFICATION); verification.setDataAndType(packageURI, PACKAGE_MIME_TYPE); verification.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); //查找满足Intent条件的广播接收者 finalList<ResolveInfo> receivers = queryIntentReceivers( verification,null,PackageManager.GET_DISABLED_COMPONENTS); // verificationId为当前等待Verification的安装包个数 finalint verificationId = mPendingVerificationToken++; //设置Intent的参数，例如要校验的包名 verification.putExtra(PackageManager.EXTRA_VERIFICATION_ID, VerificationId); verification.putExtra( PackageManager.EXTRA_VERIFICATION_INSTALLER_PACKAGE, installerPackageName); verification.putExtra( PackageManager.EXTRA_VERIFICATION_INSTALL_FLAGS,flags); if(verificationURI != null) { verification.putExtra(PackageManager.EXTRA_VERIFICATION_URI, verificationURI); } finalPackageVerificationState verificationState = new PackageVerificationState(requiredUid,args); //将上面创建的PackageVerificationState保存到mPendingVerification中 mPendingVerification.append(verificationId, verificationState); //筛选符合条件的广播接收者 finalList<ComponentName> sufficientVerifiers = matchVerifiers(pkgLite,receivers,verificationState); if (sufficientVerifiers != null) { finalint N = sufficientVerifiers.size(); ...... for(int i = 0; i < N; i++) { finalComponentName verifierComponent = sufficientVerifiers.get(i); final Intent sufficientIntent = newIntent(verification); sufficientIntent.setComponent(verifierComponent); //向校验包发送广播 mContext.sendBroadcast(sufficientIntent); } } } //除此之外，如果在执行adb install的时候指定了校验包，则需要向其单独发送校验广播 finalComponentName requiredVerifierComponent = matchComponentForVerifier(mRequiredVerifierPackage, receivers); if (ret == PackageManager.INSTALL_SUCCEEDED &&mRequiredVerifierPackage != null) { verification.setComponent(requiredVerifierComponent); mContext.sendOrderedBroadcast(verification, android.Manifest.permission.PACKAGE_VERIFICATION_AGENT, new BroadcastReceiver() { //调用sendOrderdBroadcast，并传递一个BroadcastReceiver，该对象将在 //广播发送的最后被调用。读者可参考sendOrderdBroadcast的文档说明 public void onReceive(Context context, Intent intent) { final Message msg =mHandler.obtainMessage( CHECK_PENDING_VERIFICATION); msg.arg1 = verificationId; //设置一个超时执行时间，该值来自Settings数据库的secure表，默认为60秒 mHandler.sendMessageDelayed(msg, getVerificationTimeout()); } },null, 0, null, null); mArgs = null; } }......//不用做Verification的流程 ~~~ PKMS的Verification工作其实就是收集安装包的信息，然后向对应的校验者发送广播。但遗憾的是，当前Android中还没有能处理Verification的组件。 另外，该组件处理完Verification后，需要调用PKMS的verifyPendingInstall函数，以通知校验结果。