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Planos Descontinuados. Contratos e Regulamentos. Planos sem fidelidade. The next section describes some important terms and concepts related to app signing and security. Java Keystores. A public key certificate. You must keep the upload key secret. However, you can share the certificate that is generated using your upload key. You may generate an upload key in one of the following ways:. This is used to register public key s with API providers; it's intended to be shared, as it does not contain your private key.
A certificate fingerprint is a short and unique representation of a certificate that is often requested by API providers alongside the package name to register an app to use their service. Other fingerprints can also be computed by downloading the original certificate. Because the debug certificate is created by the build tools and is insecure by design, most app stores including the Google Play Store do not accept apps signed with a debug certificate for publishing.
Android Studio automatically stores your debug signing information in a signing configuration so you do not have to enter it every time you debug. A signing configuration is an object consisting of all of the necessary information to sign your app, including the keystore location, keystore password, key name, and key password.
For more information about how to build and run apps for debugging, see Build and Run Your App. The self-signed certificate used to sign your app for debugging has an expiration date of 30 years from its creation date. When the certificate expires, you get a build error.
To fix this problem, simply delete the debug. The next time you build and run a debug version of your app, Android Studio regenerates a new keystore and debug key. When you are ready to publish your app, you need to sign your app and upload it to an app store, such as Google Play.
When publishing your app to Google Play for the first time, you must also configure Play App Signing. Play App Signing is optional for apps created before August This section shows you how to properly sign your app for release and configure Play App Signing. If you don't already have an upload key, which is useful when configuring Play App Signing, you can generate one using Android Studio as follows:.
On the New Key Store window, provide the following information for your keystore and key, as shown in figure 2. Figure 2. Create a new upload key and keystore in Android Studio.
If you would like to build and sign your app with your upload key, continue to the section about how to Sign your app with your upload key. If you only want to generate the key and keystore, click Cancel. If you already have an upload key, use it to sign your app. If instead your app is already signed and published to the Google Play store with an existing app signing key, use it to sign your app and make sure to encrypt and export it to opt your app in to Play App Signing.
To sign your app using Android Studio, and export an existing app signing key, follow these steps:. Specify the path to your keystore, the alias for your key, and enter the passwords for both. If you haven't yet prepared your upload keystore and key, first Generate an upload key and keystore and then return to complete this step. Figure 3. Sign your app with your upload key. You can then use your encrypted app signing key to opt in an existing app into Play App Signing.
In the next window shown in figure 4 , select a destination folder for your signed app, select the build type, choose the product flavor s if applicable. If you are building and signing an APK, you need to select which Signature Versions you want your app to support. To learn more, read about app signing schemes.
Figure 4. Generate a signed version of your app for the selected product flavors. Figure 5. Click the link in the popup to analyze or locate your app bundle, or locate your exported signing key. After Android Studio finishes building your signed app, you can either locate or analyze your app by clicking on the appropriate option in the pop-up notification. If you selected the option to export your signing key, you can quickly navigate to it by clicking the dropdown arrow in the bottom right corner of the popup to expand it and clicking Show Exported Key File , as shown in figure 5.
Otherwise, continue to the page about how to Upload your app to the Play Console. As described earlier in this page, configuring Play App Signing is required to sign your app for distribution through Google Play except for apps created before August , which may continue distributing self-signed APKs. The steps you need to take depend on whether your app has not yet been published to Google Play, or your app is already signed and was published before August using an existing app signing key.
To configure signing for an app that has not yet been published to Google Play, proceed as follows:. In the section called App Bundles , click Browse files to locate and upload the app you signed using your upload key. If you need to create a new upload key for you app, go to the section about how to Reset a lost or compromised private upload key.
Google Play now signs your app with your existing key when deploying it to users. However, one of the most important benefits to Play App Signing is the ability to separate the key you use to sign the artifact you upload to Google Play from the key that Google Play uses to sign your app for distribution to users.
So, consider following the steps in the next section to generate and register a separate upload key. When you're publishing an app that is not signed by an upload key, the Google Play Console provides the option to register one for future updates to the app.
That way, Google keeps your signing key secure, and you have the option to reset a lost or compromised private upload key. This section describes how to create an upload key, generate an upload certificate from it, and register that certificate with Google Play for future updates of your app. The following describes the situations in which you see the option to register an upload certificate in the Play Console:.
After you create your upload key and keystore, you need to generate a public certificate from your upload key using keytool , with the following command:. Now that you have your upload certificate, register it with Google when prompted in the Play Console or read the section below to register it though the Google Play support team.
In some circumstances, you might want to change your app's signing key. For example, because you want a cryptographically stronger key or your signing key has been compromised. However, because users can only update your app if the update is signed with the same signing key, it's difficult to change the signing key for an app that's already published.
If you publish your app to Google Play, you can upgrade the siging key for your published app through the Play Console—your new key is used to sign new installs and app updates, while your older app signing key is used to sign updates for users who installed your app before the key upgrade. To learn more, read Upgrade your app signing key for new installs.
If you lost your private upload key or your private key has been compromised, you can create a new one and contact the Google Play support team to reset the key.
In Android Studio, you can configure your project to sign the release version of your app automatically during the build process by creating a signing configuration and assigning it to your release build type.
A signing configuration consists of a keystore location, keystore password, key alias, and key password. To create a signing configuration and assign it to your release build type using Android Studio, complete the following steps:.
Select your keystore file, enter a name for this signing configuration as you may create more than one , and enter the required information. Figure 7. The window for creating a new signing configuration. Figure 8. Select a signing configuration in Android Studio. When you create a signing configuration, your signing information is included in plain text in your Gradle build files.
If you are working in a team or sharing your code publicly, you should keep your signing information secure by removing it from the build files and storing it separately. You can read more about how to remove your signing information from your build files in Remove Signing Information from Your Build Files. For more about keeping your signing information secure, read Secure your key. If your app uses product flavors and you would like to sign each flavor differently, you can create additional signing configurations and assign them by flavor:.
Figure You can also specify your signing settings in Gradle configuration files. For more information, see Configuring Signing Settings. If you choose not to opt in to Play App Signing only for apps created before August , you can manage your own app signing key and keystore. Keep in mind, you are responsible for securing the key and the keystore.
When you are ready to create your own key and keystore, make sure you first choose a strong password for your keystore and a separate strong password for each private key stored in the keystore.
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