设备端保护
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
Google Play 保护机制包含有助于确保设备和数据安全的设备端功能。这些设备端服务与基于云的组件集成，可让 Google 推送更新，从而不断改进其功能。
PHA 扫描服务
Google Play 保护机制利用基于云的应用验证服务来确定应用是否为潜在有害应用 (PHA)。Google Play 保护机制会扫描 Android 设备，寻找 PHA 的证据。它会检查设备上的所有应用，无论应用是从何处下载的。
每日 PHA 扫描
Google Play 保护机制每天扫描设备一次。如果发现 PHA，系统会发送通知，要求用户将其移除。如果 PHA 对用户没有任何好处，Google Play 保护机制可以从受影响的设备中移除该 PHA，并阻止日后安装该 PHA。Google Play 保护机制每天扫描 2,000 亿个 Android 应用。每日扫描可让 Google Play 保护机制快速应对检测到的威胁，从而缩短用户可能遭受威胁的时间，并减少可能受到影响的设备数量。为了节省数据流量，这些每日扫描仅在检测到可疑 PHA 时才联系 Google 服务器请求验证。
虽然 Google Play 保护机制在后台运行，但用户可以在 Google Play 应用的“Google Play 保护机制”部分查看上次扫描设备的时间和已扫描应用的列表。了解如何查看设备的安全性状态。
按需进行潜在有害应用扫描
该机制每天会自动进行精简扫描，除此之外，用户可以随时启动全面的设备扫描。如果用户请求进行扫描，设备会与 Google 服务器联系以获取最新信息，并扫描设备上的所有应用。如果发现有害应用，Google Play 保护机制会通知用户采取行动，或代表用户采取行动。这种可见性让用户安心无忧，因为他们知道自己始终受到最新保护。
离线 PHA 扫描
当设备处于离线状态或网络连接中断时，可能会发生 PHA 安装。为解决此问题，Google Play 保护机制提供了离线扫描功能，有助于防止在离线状态下安装已知的 PHA。在设备重新连接到网络后，该机制会进行全面扫描。
自动停用 PHA
有些 PHA 的危害性比其他 PHA 更大，我们会根据 PHA 的分类采取不同的处理方式。系统会自动从设备中移除最有害的 PHA，同时停用不太严重的 PHA。已停用的应用无法使用，但仍保留在设备上，并且与该应用关联的所有数据均可恢复。当应用被自动停用时，用户会收到通知，并可决定移除该应用或重新启用该应用，使其再次可用。如果您不采取任何行动，应用将保持停用状态。
针对非 Play 安装的实时防护
Google Play 保护机制可为从 Google Play 以外的来源安装的应用提供保护。当用户尝试安装应用时，Play 保护机制会针对 Google Play 保护机制已编入目录的已知有害或恶意样本对该应用进行实时检查。
系统还会通过设备端机器学习、相似性比较和其他技术来检查应用是否可疑。如果应用被识别为恶意或可疑，我们会警告用户，在极端情况下还会阻止安装。
Google Play 保护机制还针对之前未扫描过的新兴威胁提供新的保护措施。如果 Play 保护机制未从收集的样本中识别出任何恶意代码，则会建议对应用进行代码级实时扫描，以提取重要信号供 Google 进行评估。这有助于防范可能经过修改以逃避检测的新型恶意应用。如果用户同意扫描应用，则会将应用数据上传到 Google 以供分析。很快，Play 保护机制会告知用户该应用看起来能安心安装或者可能有害。
申诉
您可以针对应用遭 Google Play 下架的处置提出申诉。我们会在适当的情况下恢复应用：例如我们的判断有误，且我们发现您的应用并未违反 Google Play 开发者计划政策和开发者分发协议。
如需了解详情，请参阅我的应用已从 Google Play 下架。
本页面上的内容和代码示例受内容许可部分所述许可的限制。Java 和 OpenJDK 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC)：2025-08-16。
[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["没有我需要的信息","missingTheInformationINeed","thumb-down"],["太复杂/步骤太多","tooComplicatedTooManySteps","thumb-down"],["内容需要更新","outOfDate","thumb-down"],["翻译问题","translationIssue","thumb-down"],["示例/代码问题","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-08-16。"],[[["\u003cp\u003eGoogle Play Protect safeguards devices and data with on-device and cloud-based security measures, including daily scans of 125 billion apps to detect and remove Potentially Harmful Applications (PHAs).\u003c/p\u003e\n"],["\u003cp\u003eUsers have the option to initiate on-demand full-device scans for immediate security checks and can view their device's security status in the Google Play app.\u003c/p\u003e\n"],["\u003cp\u003eReal-time protection is provided for apps installed from sources outside of Google Play, using machine learning and code-level scanning to identify and block potential threats.\u003c/p\u003e\n"],["\u003cp\u003eGoogle Play Protect offers offline scanning capabilities to prevent known PHAs from being installed even without network connectivity, ensuring continuous protection.\u003c/p\u003e\n"],["\u003cp\u003eDevelopers can utilize the Play Integrity API to check device compatibility with Google Play Protect and identify potential PHAs, enhancing app security and user trust.\u003c/p\u003e\n"]]],["Google Play Protect scans devices for Potentially Harmful Applications (PHAs) daily, checking all apps regardless of the download source. It can remove severe PHAs or disable less harmful ones, notifying users of actions taken. Users can initiate full-device scans anytime. Offline scanning prevents known PHA installations, with full scans upon reconnection. Real-time checks are performed on non-Play Store installs using machine learning and other methods. New app protections trigger code-level scans. The Play Integrity API allows developers to verify device and app integrity.\n"],null,["Google Play Protect includes on-device capabilities that help keep devices\nand data safe. These on-device services integrate with cloud-based components\nthat allow Google to push updates that constantly improve their\nfunctionality.\n\nPHA scanning services\n\nGoogle Play Protect leverages cloud-based app-verification services to\ndetermine if apps are Potentially Harmful Applications (PHAs). Google Play\nProtect scans Android devices for evidence of PHAs. It checks all apps on a\ndevice, regardless of where the app was downloaded.\n\nDaily PHA scan\n\nGoogle Play Protect scans devices once everyday. If a PHA is found, a\nnotification asks the user to remove it. In cases where the PHA has no benefit\nto users, Google Play Protect can remove the PHA from affected devices and block\nfuture installs. Google Play Protect scans 200 billion Android apps every day. Daily\nscanning allows Google Play Protect to respond quickly to a detected threat,\nreducing how long users could be exposed to the threat and how many devices may\nbe affected. To conserve data, these daily scans only contact Google servers to\nrequest verification when a suspected PHA is detected.\n\nThough Google Play Protect works in the background, users can check when\ntheir device was last scanned and view the list of scanned apps in the Google\nPlay Protect section of their Google Play app. [Learn how to check your\ndevice's security status.](https://support.google.com/android/answer/2812853)\n\nOn-demand PHA scan\n\nIn addition to a lightweight, daily, automatic scan, users can start a\nfull-device scan at any time. Upon request, the device contacts Google servers\nfor the latest information and scans all apps on the device. If a harmful app is\ndiscovered, Google Play Protect notifies the user to take action or takes action\non their behalf. This visibility gives users peace of mind that they have the\nlatest protection at all times.\n\nOffline PHA scan\n\nPHA installations can occur when a device is offline or has lost network\nconnectivity. To address this, Google Play Protect has offline scanning, which\nhelps prevent well-known PHAs from being installed offline. When the device\nregains network connectivity, it undergoes a full scan.\n\nAutomatically disable PHAs\n\nSome PHAs are more harmful than others and we treat them differently\ndepending on the PHA classification. The most harmful PHAs are automatically\nremoved from the device, while less severe PHAs are disabled. A disabled app is\nunusable but remains on the device, and any data associated with the app is\nrecoverable. When an app is automatically disabled, users are notified and can\nmake the decision to remove the app or re-enable it to make it usable again. If\nno action is taken, the app remains disabled.\n\nReal-time protections for non-Play installs\n\nGoogle Play Protect offers protection for apps that are installed\nfrom sources outside of Google Play. When a user tries to install an\napp, Play Protect conducts a real-time check of the app against known\nharmful or malicious samples that Google Play Protect has cataloged..\nThe app is also checked by on-device machine learning, similarity\ncomparisons and other techniques to confirm if it's suspicious. If\nthe app is identified as malicious or suspicious, we will warn users\nor block the installation in extreme cases.\n\nGoogle Play Protect also offers new protections for emerging threats\nthat were previously not scanned before. When Play Protect does not\nrecognize any malicious code from the collected samples, it recommends a real-time\ncode-level scan of the app to extract important signals for\nevaluation by Google. This helps combat novel malicious apps that may\nhave been altered to avoid detection. If a user agrees to scan the\napp, they will upload the app data to Google for analysis. A short\ntime later, Play Protect will let users know if the app appears safe\nto install or is potentially harmful.\n\nPlay Integrity API\n\nDevelopers and enterprises can use the [Play Integrity API](https://developer.android.com/google/play/integrity/overview) to\ndetermine whether a device is compatible with Google Play Protect, whether Play Protect is\nturned on, and whether it has identified any known PHAs that are installed on the device.\n\nAppeals\n\nYou can appeal your app's removal from Google Play. We will reinstate apps in\nappropriate circumstances, including if an error was made and we find that your\napp does not violate the Google Play [Developer Program\nPolicies](https://play.google.com/about/developer-content-policy/) and [Developer\nDistribution Agreement](https://play.google.com/about/developer-distribution-agreement.html).\n\nFor more information see, [My\napp has been removed from Google Play](https://support.google.com/googleplay/android-developer/answer/2477981)."]]
