智能手机为我们带来了几乎可以做任何事情的应用程序的便利。但是，如果您点击它们并且没有任何反应，那将无济于事。如果某个应用无法在您的Android设备上打开，这里有一些可能的修复方法。
重启手机
由于临时问题，应用程序通常无法正常启动，只需重新启动设备即可解决。
您可以通过长按电源按钮并选择重新启动(Restart)或向下滑动应用程序阴影，选择电源图标，然后选择重新启动来执行软重启(Restart)。较旧的Android手机使用电源按钮方法；更新的模型使用 app-shade 方法。
该应用程序(App)适用于不同版本(Different Version)的Android吗？
如果您收到有关应用程序是为旧版Android制作的警告，则该应用程序可能无法启动或正常运行。开发人员必须为您当前版本的Android手机发布更新版本的应用程序。在极端情况下，您可能需要阅读如何降级您的 Android 操作系统版本(How to Downgrade Your Android OS Version)。
检查 Android 更新
相反的问题也可能出现。对于您当前的Android(Android)版本，该应用程序可能太新了。检查您的手机上是否有任何待处理的系统更新。在尝试重新运行应用程序之前安装它们。
要查看是否有任何系统更新正在等待，请向下拖动应用程序阴影(app-shade)并打开设置菜单(settings menu)。然后寻找软件更新(Software update)或类似的东西。
如果您没有看到软件更新菜单，您可以使用设置菜单中的搜索功能。您将看到您的手机已更新或有更新待处理的通知。
检查应用更新
也有可能您的应用程序已被开发人员更新，但您尚未安装更新。打开Google Play 商店(Google Play Store)并转到应用程序页面。如果更新待处理，您将看到一个“更新”按钮，而不是通常的安装或打开按钮。
或者，您可以打开Google Play 商店(Google Play Store)，然后选择您的个人资料图标(profile icon)>我的应用程序和游戏(My Apps and Games)>更新选项卡(Updates tab)。所有需要更新的应用程序都将显示在此处。
旁加载(Sideload)旧版本(Older Version)的应用程序(App)
回到以前在手机上运行的旧版本的应用程序可以解决各种问题。如果引入了新错误，您可以使用旧版本的应用程序来避免它们。如果您手机的操作系统太旧，则较旧版本的应用程序可能是您手机上可以运行的最后一个版本。
如果您的手机制造商不打算更新较新版本的Android，您通常可以旁加载旧版本的应用程序。
侧载是一种解决方法，您可以手动将应用程序的APK包复制到手机中并自行安装。您需要允许在手机上安装来自未知来源的应用程序。
您通常可以在APK mirror等网站上找到该应用程序旧版本的APK文件。
这仅在相关应用程序不依赖 Web 服务工作时才可行。旧版本的应用程序很少能与应用程序制造商提供的最新网络服务保持兼容。这些服务通常仅适用于最新版本的软件。但是，对于某些不需要连接到 Web 服务的应用程序（例如游戏或独立实用程序），可以从APK文件安装旧版本。
查看如何使用 APK 文件安装 Android 应用程序(How To Install Android Apps Using The APK File)和5 个适用于 Android 应用程序的最佳安全 APK 下载站点以(5 Best Safe APK Download Sites for Android Apps)获取详细信息。
强制关闭应用程序
应用程序可能无法打开，因为它实际上从未真正关闭过。因此，强制关闭应用程序并再次运行它。
确切的步骤可能会因Android(Android)手机品牌和操作系统版本的不同而略有不同。一般步骤是：
- 打开设置(Settings)
- 打开应用程序(App)，或应用程序(Applications)或管理应用程序，(Manage apps,)或类似的东西。
- 查找并选择应用程序。
- 选择Force Stop、Force Quit或类似的东西。
在应用程序被强制关闭后，尝试再次打开它，看看它是否有帮助。
清除应用程序的缓存
许多Android应用程序会维护本地信息缓存，以帮助它们更有效地工作或在 Internet 连接丢失时。如果该缓存损坏，可能会导致应用出现问题。
查看我们关于如何手动清除应用程序缓存(manually clear an app’s cache)的文章。同样(Again)，具体步骤可能会因您的Android手机型号而异。
现在重新启动应用程序。根据应用程序的类型，您可能需要重新输入登录凭据。
将应用程序从 SD 卡中移出
某些Android手机允许您安装应用程序或将部分应用程序移动到 SD 卡上。不幸的是，SD 卡不如手机内存可靠，而且很容易损坏。损坏的 SD 卡可能会阻止应用程序启动。
尝试将应用程序从 SD 卡移回内部存储(move the app back to internal storage)，之后如果任何文件损坏，您可能必须重新安装该应用程序。
卸载并重新安装应用程序
如果上述修复均不适合您，则更激进的步骤是删除并重新安装该应用程序。您可能会丢失遇到问题的应用程序的数据。所以，看看是否有办法在删除之前保留这些数据。这是如何做到的：
- 打开 Google Play 应用程序。
- 选择您的个人资料图标。
- 选择我的应用和游戏(My apps & games)。
- 选择已安装(Installed)选项卡。
- 选择有问题的应用程序。
- 选择卸载(Uninstall)按钮并确认。
- 现在选择安装(Install)按钮并等待应用程序完成下载。
- 再次运行应用程序。
希望您现在可以再次拥有一个正常工作的应用程序。
删除 Webview 更新
WebView是许多应用程序使用的Android的重要共享组件。当WebView出现问题时，可能会导致应用程序行为异常。
如果Webview(Webview)的最新更新对您的手机造成严重破坏，您实际上可以回滚到旧版本。以下是删除Webview更新的方法：
- 打开 Google Play 应用程序。
- 搜索Webview。
- 从结果中打开应用页面。
- 选择卸载按钮(Uninstall button)并确认您的选择。
检查您的应用程序是否再次运行。如果在删除WebView更新后它可以工作，请等到以后的更新可用，或者应用程序本身获得修复问题的更新。然后您可以使用与上述相同的步骤再次更新WebView ，但您将使用(WebView)更新(Update)按钮。
联系应用开发者
如果一切都失败了，您可能需要向应用程序的开发人员寻求帮助。有多种方法可以做到这一点。
大多数人只是在Google Play商店中对应用程序进行评论，然后等待回复。在应用页面上找到“开发者联系方式”部分，让开发者知道您的问题。通常，开发人员渴望确保他们的软件正常工作。只要(Just)记住要有礼貌！
App Won’t Open on Android? 10 Ways To Fix
Smartphones have brought us the convenience оf apps that can do just about anything. But that’s not much help if you tap them and nоthing happens. If an app won’t open оn your Android devicе, here are some possible fixes.
Restart Your Phone
Often apps don’t launch properly due to temporary issues that get resolved by simply restarting your device.
You can perform a soft reboot by long-pressing the power button and selecting Restart or swiping the app-shade down, selecting the power icon, and then choosing Restart. Older Android phones use the power button method; more recent models use the app-shade method.
Is the App for a Different Version of Android?
If you get a warning that an app is made for an older version of Android, the app may not launch or work correctly. The developers will have to release a newer version of the app for the current version of your Android phone. In extreme cases, you may want to read How to Downgrade Your Android OS Version.
Check for Android Updates
The opposite problem can also crop up. The app might be too new for your current version of Android. Check if there are any pending system updates on your phone. Install them before trying to rerun the app.
To see if you have any system updates waiting in the wings, drag the app-shade down and open the settings menu. Then look for Software update or something similar.
You can use the search function within the settings menu if you don’t see the software update menu. You’ll see a notification your phone is either up to date or that an update is pending.
Check for App Updates
It’s also possible that your app has been updated by the developer, but you haven’t installed the update yet. Open the Google Play Store and go to the app’s page. If an update is pending, you’ll see an “update” button in place of the usual install or open button.
Alternatively, you can open the Google Play Store, then select your profile icon > My Apps and Games > Updates tab. All apps that require an update will be shown here.
Sideload an Older Version of the App
Going back to an older version of an app that has worked on your phone before can solve various problems. If new bugs have been introduced, you can avoid them by using the older version of the app. If your phone’s operating system is too old, the older version of an app may be the last version that will work on your handset.
If your phone’s manufacturer isn’t going to update a newer version of Android, you can usually sideload the older version of the app.
Sideloading is a workaround where you manually copy the app’s APK package into the phone and install it yourself. You need to allow the installation of apps from unknown sources on your phone.
You can usually find the APK file for older versions of that app on sites like APK mirror.
This is only viable if the app in question doesn’t rely on web services to work. It’s uncommon for older versions of an app to remain compatible with the latest web services provided by the app maker. These services are usually intended to work with only the latest version of the software. However, for some apps, like games or self-contained utilities, which don’t require a connection to web services, installing an old version from an APK file is possible.
Check out How To Install Android Apps Using The APK File and 5 Best Safe APK Download Sites for Android Apps for detailed information.
Force Close the App
An app may not open because it never actually closed in the first place. So, force close the app and run it again.
The exact steps may vary slightly from one brand of Android phone to the next and by the operating system version. The general steps are:
- Open Settings
- Open App, or Applications or Manage apps, or something similar.
- Look for and select the app.
- Select Force Stop, Force Quit, or something similar.
After the app has been forced to close, try to open it again and see if it helps.
Clear the App’s Cache
Many Android applications maintain a local cache of information to help them work more efficiently or when an internet connection is lost. If that cache becomes corrupted, it can cause issues with an app.
Check out our article on how to manually clear an app’s cache. Again, the exact steps may vary depending on your model of Android phone.
Now relaunch the app. You may have to reenter your login credentials depending on the type of app.
Move the App Off the SD Card
Some Android phones let you install applications or move parts of applications onto an SD card. Unfortunately, SD cards are less reliable than the internal memory of your phone and are easily corrupted. A damaged SD card can prevent the app from launching.
Try to move the app back to internal storage from the SD card, after which you’ll probably have to reinstall the app if any files were corrupted.
Uninstall and Reinstall the App
If none of the above fixes work for you, a more drastic step is to delete and reinstall the application. You might lose your data for the app you’re having trouble with. So, see if there’s a way to preserve that data before deleting it. Here’s how to do it:
- Open the Google Play app.
- Select your profile icon.
- Select My apps & games.
- Select the Installed tab.
- Select the problematic app.
- Select the Uninstall button and confirm.
- Now select the Install button and wait for the app to finish downloading.
- Run the app again.
Hopefully, you’ll now have a working app again.
Remove Webview Updates
WebView is a crucial shared component of Android that’s used by many applications. When something goes wrong with WebView, it can cause apps to misbehave.
If the latest update of Webview is wreaking havoc on your phone, you can actually roll back to an older version. Here’s how to remove Webview updates:
- Open the Google Play App.
- Search for Webview.
- Open the app page from the results.
- Select the Uninstall button and confirm your choice.
Check if your app is working again. If it’s working after removing WebView updates, wait until a later update becomes available, or the app itself gets an update that fixes the issue. Then you may update WebView again using the same step as above, except you’ll use the Update button instead.
Contact the App Developer
If all else fails, you may have to ask the app’s developer for help. There are various ways to do this.
Most people simply leave a review on the app in the Google Play store and wait for a response. Find a “developer contact” section on the app’s page and let the developer know of your issue. Usually, developers are eager to make sure their software works. Just remember to be polite!
