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‎docs/checks/AppLinkSplitToWebAndCustom.md.html‎

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<meta charset="utf-8">
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(#) Android App links should only use http(s) schemes
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!!! ERROR: Android App links should only use http(s) schemes
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This is an error.
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Id
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: `AppLinkSplitToWebAndCustom`
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Summary
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: Android App links should only use http(s) schemes
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Severity
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: Error
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Category
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: Correctness
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Platform
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: Android
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Vendor
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: Android Open Source Project
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Feedback
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: https://issuetracker.google.com/issues/new?component=192708
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Affects
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: Manifest files
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Editing
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: This check runs on the fly in the IDE editor
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See
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: https://developer.android.com/training/app-links/verify-android-applinks#add-intent-filters
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Implementation
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: [Source Code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-checks/src/main/java/com/android/tools/lint/checks/AppLinksValidDetector.kt)
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Tests
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: [Source Code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-tests/src/test/java/com/android/tools/lint/checks/AppLinksValidDetectorTest.kt)
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Copyright Year
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: 2017
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In order for Android App Links to open in your app, Android must perform
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domain verification. However, Android only sends domain verification
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requests for `<intent-filter>`s that only contain http(s) schemes.
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To ensure correct behavior, please split your http(s) schemes and other
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schemes into two different `<intent-filter>`s.
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!!! Tip
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This lint check has an associated quickfix available in the IDE.
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(##) Example
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Here is an example of lint warnings produced by this check:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~text
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AndroidManifest.xml:7:Error: Split your http(s) and custom schemes into
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separate intent filters [AppLinkSplitToWebAndCustom]
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&lt;intent-filter android:autoVerify="true" android:order="-1" android:priority="-1"&gt;
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^
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Here are the relevant source files:
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`AndroidManifest.xml`:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~xml linenumbers
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&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.example.helloworld" &gt;
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&lt;uses-sdk android:minSdkVersion="31" android:targetSdkVersion="34" /&gt;
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&lt;application&gt;
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&lt;activity android:name=".SplitWebAndCustomActivity" android:exported="true"&gt;
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&lt;intent-filter android:autoVerify="true" android:order="-1" android:priority="-1"&gt;
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&lt;action android:name="android.intent.action.VIEW" /&gt;
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&lt;category android:name="android.intent.category.DEFAULT" /&gt;
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&lt;category android:name="android.intent.category.BROWSABLE" /&gt;
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&lt;uri-relative-filter-group&gt;
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&lt;data android:path="/path" /&gt;
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&lt;data android:query="queryparam=value" /&gt;
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&lt;/uri-relative-filter-group&gt;
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&lt;data android:scheme="http" /&gt;
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&lt;data android:scheme="custom" /&gt;
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&lt;data android:host="library.com" /&gt;
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&lt;data android:path="@string/path" /&gt;
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&lt;data android:path="/&lt;&amp;&apos;'" /&gt;
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&lt;data android:path='/single"quote' /&gt;
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&lt;data android:path="" /&gt;
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&lt;!-- Test having tags underneath the host elements as well --&gt;
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&lt;action android:name="android.intent.action.SEND"/&gt;
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&lt;uri-relative-filter-group&gt;
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&lt;data android:path="/path" /&gt;
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&lt;data android:query="queryparam=value" /&gt;
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&lt;/uri-relative-filter-group&gt;
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&lt;/intent-filter&gt;
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&lt;/activity&gt;
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&lt;/application&gt;
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&lt;/manifest&gt;
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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`res/values/strings.xml`:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~xml linenumbers
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&lt;resources&gt;
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&lt;string name="path"&gt;/path&lt;/string&gt;
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&lt;/resources&gt;
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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You can also visit the
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[source code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-tests/src/test/java/com/android/tools/lint/checks/AppLinksValidDetectorTest.kt)
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for the unit tests for this check to see additional scenarios.
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The above example was automatically extracted from the first unit test
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found for this lint check, `AppLinksValidDetector.test_splitToWebAndCustomSchemes`.
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To report a problem with this extracted sample, visit
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https://issuetracker.google.com/issues/new?component=192708.
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(##) Suppressing
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You can suppress false positives using one of the following mechanisms:
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* Adding the suppression attribute
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`tools:ignore="AppLinkSplitToWebAndCustom"` on the problematic XML
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element (or one of its enclosing elements). You may also need to add
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the following namespace declaration on the root element in the XML
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file if it's not already there:
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`xmlns:tools="http://schemas.android.com/tools"`.
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```xml
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&lt;?xml version="1.0" encoding="UTF-8"?&gt;
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&lt;manifest xmlns:tools="http://schemas.android.com/tools"&gt;
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...
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&lt;activity tools:ignore="AppLinkSplitToWebAndCustom" .../&gt;
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...
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&lt;/manifest&gt;
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```
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* Using a special `lint.xml` file in the source tree which turns off
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the check in that folder and any sub folder. A simple file might look
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like this:
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```xml
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&lt;?xml version="1.0" encoding="UTF-8"?&gt;
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&lt;lint&gt;
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&lt;issue id="AppLinkSplitToWebAndCustom" severity="ignore" /&gt;
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&lt;/lint&gt;
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```
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Instead of `ignore` you can also change the severity here, for
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example from `error` to `warning`. You can find additional
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documentation on how to filter issues by path, regular expression and
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so on
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[here](https://googlesamples.github.io/android-custom-lint-rules/usage/lintxml.md.html).
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* In Gradle projects, using the DSL syntax to configure lint. For
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example, you can use something like
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```gradle
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lintOptions {
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disable 'AppLinkSplitToWebAndCustom'
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}
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```
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In Android projects this should be nested inside an `android { }`
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block.
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* For manual invocations of `lint`, using the `--ignore` flag:
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```
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$ lint --ignore AppLinkSplitToWebAndCustom ...`
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```
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* Last, but not least, using baselines, as discussed
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[here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).
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<!-- Markdeep: --><style class="fallback">body{visibility:hidden;white-space:pre;font-family:monospace}</style><script src="markdeep.min.js" charset="utf-8"></script><script src="https://morgan3d.github.io/markdeep/latest/markdeep.min.js" charset="utf-8"></script><script>window.alreadyProcessedMarkdeep||(document.body.style.visibility="visible")</script>

‎docs/checks/AppLinkWarning.md.html‎

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<meta charset="utf-8">
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(#) App Link warning
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!!! WARNING: App Link warning
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This is a warning.
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Id
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: `AppLinkWarning`
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Summary
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: App Link warning
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Severity
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: Warning
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Category
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: Correctness
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Platform
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: Android
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Vendor
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: Android Open Source Project
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Feedback
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: https://issuetracker.google.com/issues/new?component=192708
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Affects
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: Manifest files
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Editing
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: This check runs on the fly in the IDE editor
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See
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: https://developer.android.com/training/app-links
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See
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: https://g.co/AppIndexing/AndroidStudio
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Implementation
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: [Source Code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-checks/src/main/java/com/android/tools/lint/checks/AppLinksValidDetector.kt)
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Tests
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: [Source Code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-tests/src/test/java/com/android/tools/lint/checks/AppLinksValidDetectorTest.kt)
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Copyright Year
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: 2017
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From Android 12, intent filters that use the HTTP and HTTPS schemes will
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no longer bring the user to your app when the user clicks
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a link, unless the intent filter is an Android App Link.
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Such intent filters must include certain elements, and at least
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one Android App Link for each domain must have
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`android:autoVerify="true"` to verify ownership of the
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domain. We recommend adding `android:autoVerify="true"` to any intent
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filter that is intended to be an App Link, in case the other
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App Links are modified.
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!!! Tip
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This lint check has an associated quickfix available in the IDE.
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(##) Example
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Here is an example of lint warnings produced by this check:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~text
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AndroidManifest.xml:6:Warning: This intent filter has the format of an
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Android App Link but is missing the autoVerify attribute; add
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android:autoVerify="true" to ensure your domain will be validated and
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enable App Link-related Lint warnings. If you do not want clicked URLs
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to bring the user to your app, remove the
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android.intent.category.BROWSABLE category, or set
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android:autoVerify="false" to make it clear this is not intended to be
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an Android App Link. [AppLinkWarning]
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&lt;intent-filter&gt; &lt;!-- We expect a warning here --&gt;
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-------------
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Here is the source file referenced above:
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`AndroidManifest.xml`:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~xml linenumbers
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&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.example.helloworld" &gt;
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&lt;application&gt;
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&lt;activity android:name=".FullscreenActivity"&gt;
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&lt;intent-filter&gt; &lt;!-- We expect a warning here --&gt;
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&lt;action android:name="android.intent.action.VIEW" /&gt;
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&lt;category android:name="android.intent.category.DEFAULT" /&gt;
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&lt;category android:name="android.intent.category.BROWSABLE" /&gt;
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&lt;data android:scheme="http" /&gt;
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&lt;data android:scheme="https" /&gt;
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&lt;data android:host="example.com" /&gt;
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&lt;data android:pathPrefix="/gizmos" /&gt;
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&lt;/intent-filter&gt;
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&lt;intent-filter&gt; &lt;!-- Missing VIEW --&gt;
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&lt;category android:name="android.intent.category.DEFAULT" /&gt;
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&lt;category android:name="android.intent.category.BROWSABLE" /&gt;
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&lt;data android:scheme="http" /&gt;
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&lt;data android:scheme="https" /&gt;
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&lt;data android:host="example.com" /&gt;
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&lt;data android:pathPrefix="/gizmos" /&gt;
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&lt;/intent-filter&gt;
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&lt;intent-filter&gt; &lt;!-- Missing DEFAULT --&gt;
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&lt;action android:name="android.intent.action.VIEW" /&gt;
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&lt;category android:name="android.intent.category.BROWSABLE" /&gt;
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&lt;data android:scheme="http" /&gt;
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&lt;data android:scheme="https" /&gt;
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&lt;data android:host="example.com" /&gt;
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&lt;data android:pathPrefix="/gizmos" /&gt;
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&lt;/intent-filter&gt;
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&lt;intent-filter&gt; &lt;!-- Missing BROWSABLE --&gt;
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&lt;action android:name="android.intent.action.VIEW" /&gt;
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&lt;category android:name="android.intent.category.DEFAULT" /&gt;
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&lt;data android:scheme="http" /&gt;
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&lt;data android:scheme="https" /&gt;
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&lt;data android:host="example.com" /&gt;
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&lt;data android:pathPrefix="/gizmos" /&gt;
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&lt;/intent-filter&gt;
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&lt;intent-filter&gt; &lt;!-- Has custom scheme, missing http --&gt;
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&lt;action android:name="android.intent.action.VIEW" /&gt;
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&lt;category android:name="android.intent.category.DEFAULT" /&gt;
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&lt;category android:name="android.intent.category.BROWSABLE" /&gt;
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&lt;data android:scheme="other" /&gt;
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&lt;data android:host="example.com" /&gt;
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&lt;data android:pathPrefix="/gizmos" /&gt;
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&lt;/intent-filter&gt;
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&lt;intent-filter&gt; &lt;!-- Has no scheme --&gt;
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&lt;action android:name="android.intent.action.VIEW" /&gt;
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&lt;category android:name="android.intent.category.DEFAULT" /&gt;
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&lt;category android:name="android.intent.category.BROWSABLE" /&gt;
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&lt;data android:host="example.com" /&gt;
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&lt;data android:pathPrefix="/gizmos" /&gt;
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&lt;/intent-filter&gt;
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&lt;intent-filter&gt; &lt;!-- Missing host --&gt;
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&lt;action android:name="android.intent.action.VIEW" /&gt;
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&lt;category android:name="android.intent.category.DEFAULT" /&gt;
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&lt;category android:name="android.intent.category.BROWSABLE" /&gt;
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&lt;data android:scheme="http" /&gt;
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&lt;data android:scheme="https" /&gt;
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&lt;/intent-filter&gt;
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&lt;intent-filter android:autoVerify="false"&gt; &lt;!-- We would usually expect a warning here, but it has autoVerify="false" --&gt;
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&lt;action android:name="android.intent.action.VIEW" /&gt;
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&lt;category android:name="android.intent.category.DEFAULT" /&gt;
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&lt;category android:name="android.intent.category.BROWSABLE" /&gt;
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&lt;data android:scheme="http" /&gt;
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&lt;data android:scheme="https" /&gt;
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&lt;data android:host="example.com" /&gt;
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&lt;data android:pathPrefix="/gizmos" /&gt;
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&lt;/intent-filter&gt;
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&lt;/activity&gt;
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&lt;/application&gt;
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&lt;/manifest&gt;
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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You can also visit the
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[source code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-tests/src/test/java/com/android/tools/lint/checks/AppLinksValidDetectorTest.kt)
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for the unit tests for this check to see additional scenarios.
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The above example was automatically extracted from the first unit test
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found for this lint check, `AppLinksValidDetector.testAddAutoVerifySuggestion`.
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To report a problem with this extracted sample, visit
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https://issuetracker.google.com/issues/new?component=192708.
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(##) Suppressing
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You can suppress false positives using one of the following mechanisms:
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* Adding the suppression attribute `tools:ignore="AppLinkWarning"` on
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the problematic XML element (or one of its enclosing elements). You
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may also need to add the following namespace declaration on the root
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element in the XML file if it's not already there:
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`xmlns:tools="http://schemas.android.com/tools"`.
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```xml
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&lt;?xml version="1.0" encoding="UTF-8"?&gt;
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&lt;manifest xmlns:tools="http://schemas.android.com/tools"&gt;
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...
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&lt;activity tools:ignore="AppLinkWarning" .../&gt;
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...
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&lt;/manifest&gt;
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```
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* Using a special `lint.xml` file in the source tree which turns off
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the check in that folder and any sub folder. A simple file might look
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like this:
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```xml
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&lt;?xml version="1.0" encoding="UTF-8"?&gt;
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&lt;lint&gt;
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&lt;issue id="AppLinkWarning" severity="ignore" /&gt;
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&lt;/lint&gt;
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```
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Instead of `ignore` you can also change the severity here, for
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example from `error` to `warning`. You can find additional
203+
documentation on how to filter issues by path, regular expression and
204+
so on
205+
[here](https://googlesamples.github.io/android-custom-lint-rules/usage/lintxml.md.html).
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* In Gradle projects, using the DSL syntax to configure lint. For
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example, you can use something like
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```gradle
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lintOptions {
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disable 'AppLinkWarning'
212+
}
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```
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In Android projects this should be nested inside an `android { }`
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block.
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* For manual invocations of `lint`, using the `--ignore` flag:
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```
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$ lint --ignore AppLinkWarning ...`
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```
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* Last, but not least, using baselines, as discussed
223+
[here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).
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<!-- Markdeep: --><style class="fallback">body{visibility:hidden;white-space:pre;font-family:monospace}</style><script src="markdeep.min.js" charset="utf-8"></script><script src="https://morgan3d.github.io/markdeep/latest/markdeep.min.js" charset="utf-8"></script><script>window.alreadyProcessedMarkdeep||(document.body.style.visibility="visible")</script>

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