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Merge "cherrypick from mnc-docs docs: Updated APK Signature Scheme v2 doc." into mnc-io-docs

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Kevin Hufnagle
2016-05-11 23:58:17 +00:00
committed by Android (Google) Code Review
parent 8853f55890 7cd4a107cb
commit 24c2969312
1 changed files with 38 additions and 10 deletions
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docs/html/preview/api-overview.jd
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@@ -723,18 +723,46 @@ specify how user CAs should be trusted.</p>
<h2 id="apk_signature_v2">APK signature scheme v2</h2> <h2 id="apk_signature_v2">APK signature scheme v2</h2>
<p>The PackageManager class now supports verifying apps using the APK <p>
signature scheme v2. The APK signature scheme v2 is a whole-file signature scheme Android N introduces APK Signature Scheme v2, a new app-signing scheme that
that significantly improves verification speed and strengthens integrity offers faster app install times and better protection against unauthorized
guarantees by detecting any unauthorized changes to APK files.</p> alterations to APK files. Android Studio 2.2 and Gradle provide built-in
support for APK Signature Scheme v2.
</p>
<p>To maintain backward-compatibility, an APK must be signed with the v1 signature <p>
scheme (JAR signature scheme) before being signed with the v2 signature scheme. Although we recommend applying APK Signature Scheme v2 to your app, the new
With the v2 signature scheme, verification fails if you sign the APK with an scheme is not mandatory. If your app doesn't build properly when using the
additional certificate after signing with the v2 scheme. </p> APK Signature Scheme v2, you can use the traditional signing scheme—which
uses JAR signing—instead. To use the traditional scheme, open the
module-level <code>build.gradle</code> file and add the
<code>v2SigningEnabled</code> parameter to your release signing
configuration, setting this parameter's value to <code>false</code>:
</p>
<p>APK signature scheme v2 support will be available later in the N Developer <pre>
Preview.</p> android {
...
defaultConfig { ... }
signingConfigs {
release {
storeFile file("myreleasekey.keystore")
storePassword "password"
keyAlias "MyReleaseKey"
keyPassword "password"
<strong>v2SigningEnabled false</strong>
}
}
}
</pre>
<p>
For more information, see the following guides, which describe how to <a href=
"{@docRoot}studio/tools/publishing/app-signing.html#release-mode"> sign an app
in Android Studio</a> and how to <a href=
"{@docRoot}studio/tools/building/configuring-gradle.html#signing"> configure
the Gradle build file for signing apps</a>.
</p>
<h2 id="scoped_directory_access">Scoped directory access</h2> <h2 id="scoped_directory_access">Scoped directory access</h2>