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<meta charset="utf-8"> | ||
(#) Android App links should only use http(s) schemes | ||
|
||
!!! ERROR: Android App links should only use http(s) schemes | ||
This is an error. | ||
|
||
Id | ||
: `AppLinkSplitToWebAndCustom` | ||
Summary | ||
: Android App links should only use http(s) schemes | ||
Severity | ||
: Error | ||
Category | ||
: Correctness | ||
Platform | ||
: Android | ||
Vendor | ||
: Android Open Source Project | ||
Feedback | ||
: https://issuetracker.google.com/issues/new?component=192708 | ||
Affects | ||
: Manifest files | ||
Editing | ||
: This check runs on the fly in the IDE editor | ||
See | ||
: https://developer.android.com/training/app-links/verify-android-applinks#add-intent-filters | ||
Implementation | ||
: [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) | ||
Tests | ||
: [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) | ||
Copyright Year | ||
: 2017 | ||
|
||
In order for Android App Links to open in your app, Android must perform | ||
domain verification. However, Android only sends domain verification | ||
requests for `<intent-filter>`s that only contain http(s) schemes. | ||
|
||
To ensure correct behavior, please split your http(s) schemes and other | ||
schemes into two different `<intent-filter>`s. | ||
|
||
!!! Tip | ||
This lint check has an associated quickfix available in the IDE. | ||
|
||
(##) Example | ||
|
||
Here is an example of lint warnings produced by this check: | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~text | ||
AndroidManifest.xml:7:Error: Split your http(s) and custom schemes into | ||
separate intent filters [AppLinkSplitToWebAndCustom] | ||
<intent-filter android:autoVerify="true" android:order="-1" android:priority="-1"> | ||
^ | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
|
||
Here are the relevant source files: | ||
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`AndroidManifest.xml`: | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~xml linenumbers | ||
<manifest xmlns:android="http://schemas.android.com/apk/res/android" | ||
package="com.example.helloworld" > | ||
<uses-sdk android:minSdkVersion="31" android:targetSdkVersion="34" /> | ||
|
||
<application> | ||
<activity android:name=".SplitWebAndCustomActivity" android:exported="true"> | ||
<intent-filter android:autoVerify="true" android:order="-1" android:priority="-1"> | ||
<action android:name="android.intent.action.VIEW" /> | ||
<category android:name="android.intent.category.DEFAULT" /> | ||
<category android:name="android.intent.category.BROWSABLE" /> | ||
<uri-relative-filter-group> | ||
<data android:path="/path" /> | ||
<data android:query="queryparam=value" /> | ||
</uri-relative-filter-group> | ||
<data android:scheme="http" /> | ||
<data android:scheme="custom" /> | ||
<data android:host="library.com" /> | ||
<data android:path="@string/path" /> | ||
<data android:path="/<&''" /> | ||
<data android:path='/single"quote' /> | ||
<data android:path="" /> | ||
<!-- Test having tags underneath the host elements as well --> | ||
<action android:name="android.intent.action.SEND"/> | ||
<uri-relative-filter-group> | ||
<data android:path="/path" /> | ||
<data android:query="queryparam=value" /> | ||
</uri-relative-filter-group> | ||
</intent-filter> | ||
</activity> | ||
</application> | ||
</manifest> | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
|
||
`res/values/strings.xml`: | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~xml linenumbers | ||
<resources> | ||
<string name="path">/path</string> | ||
</resources> | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
|
||
You can also visit the | ||
[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) | ||
for the unit tests for this check to see additional scenarios. | ||
|
||
The above example was automatically extracted from the first unit test | ||
found for this lint check, `AppLinksValidDetector.test_splitToWebAndCustomSchemes`. | ||
To report a problem with this extracted sample, visit | ||
https://issuetracker.google.com/issues/new?component=192708. | ||
|
||
(##) Suppressing | ||
|
||
You can suppress false positives using one of the following mechanisms: | ||
|
||
* Adding the suppression attribute | ||
`tools:ignore="AppLinkSplitToWebAndCustom"` on the problematic XML | ||
element (or one of its enclosing elements). You may also need to add | ||
the following namespace declaration on the root element in the XML | ||
file if it's not already there: | ||
`xmlns:tools="http://schemas.android.com/tools"`. | ||
|
||
```xml | ||
<?xml version="1.0" encoding="UTF-8"?> | ||
<manifest xmlns:tools="http://schemas.android.com/tools"> | ||
... | ||
<activity tools:ignore="AppLinkSplitToWebAndCustom" .../> | ||
... | ||
</manifest> | ||
``` | ||
|
||
* Using a special `lint.xml` file in the source tree which turns off | ||
the check in that folder and any sub folder. A simple file might look | ||
like this: | ||
```xml | ||
<?xml version="1.0" encoding="UTF-8"?> | ||
<lint> | ||
<issue id="AppLinkSplitToWebAndCustom" severity="ignore" /> | ||
</lint> | ||
``` | ||
Instead of `ignore` you can also change the severity here, for | ||
example from `error` to `warning`. You can find additional | ||
documentation on how to filter issues by path, regular expression and | ||
so on | ||
[here](https://googlesamples.github.io/android-custom-lint-rules/usage/lintxml.md.html). | ||
|
||
* In Gradle projects, using the DSL syntax to configure lint. For | ||
example, you can use something like | ||
```gradle | ||
lintOptions { | ||
disable 'AppLinkSplitToWebAndCustom' | ||
} | ||
``` | ||
In Android projects this should be nested inside an `android { }` | ||
block. | ||
|
||
* For manual invocations of `lint`, using the `--ignore` flag: | ||
``` | ||
$ lint --ignore AppLinkSplitToWebAndCustom ...` | ||
``` | ||
|
||
* Last, but not least, using baselines, as discussed | ||
[here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html). | ||
|
||
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<meta charset="utf-8"> | ||
(#) App Link warning | ||
|
||
!!! WARNING: App Link warning | ||
This is a warning. | ||
|
||
Id | ||
: `AppLinkWarning` | ||
Summary | ||
: App Link warning | ||
Severity | ||
: Warning | ||
Category | ||
: Correctness | ||
Platform | ||
: Android | ||
Vendor | ||
: Android Open Source Project | ||
Feedback | ||
: https://issuetracker.google.com/issues/new?component=192708 | ||
Affects | ||
: Manifest files | ||
Editing | ||
: This check runs on the fly in the IDE editor | ||
See | ||
: https://developer.android.com/training/app-links | ||
See | ||
: https://g.co/AppIndexing/AndroidStudio | ||
Implementation | ||
: [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) | ||
Tests | ||
: [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) | ||
Copyright Year | ||
: 2017 | ||
|
||
From Android 12, intent filters that use the HTTP and HTTPS schemes will | ||
no longer bring the user to your app when the user clicks | ||
a link, unless the intent filter is an Android App Link. | ||
Such intent filters must include certain elements, and at least | ||
one Android App Link for each domain must have | ||
`android:autoVerify="true"` to verify ownership of the | ||
domain. We recommend adding `android:autoVerify="true"` to any intent | ||
filter that is intended to be an App Link, in case the other | ||
App Links are modified. | ||
|
||
!!! Tip | ||
This lint check has an associated quickfix available in the IDE. | ||
|
||
(##) Example | ||
|
||
Here is an example of lint warnings produced by this check: | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~text | ||
AndroidManifest.xml:6:Warning: This intent filter has the format of an | ||
Android App Link but is missing the autoVerify attribute; add | ||
android:autoVerify="true" to ensure your domain will be validated and | ||
enable App Link-related Lint warnings. If you do not want clicked URLs | ||
to bring the user to your app, remove the | ||
android.intent.category.BROWSABLE category, or set | ||
android:autoVerify="false" to make it clear this is not intended to be | ||
an Android App Link. [AppLinkWarning] | ||
<intent-filter> <!-- We expect a warning here --> | ||
------------- | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
|
||
Here is the source file referenced above: | ||
|
||
`AndroidManifest.xml`: | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~xml linenumbers | ||
<manifest xmlns:android="http://schemas.android.com/apk/res/android" | ||
package="com.example.helloworld" > | ||
|
||
<application> | ||
<activity android:name=".FullscreenActivity"> | ||
<intent-filter> <!-- We expect a warning here --> | ||
<action android:name="android.intent.action.VIEW" /> | ||
<category android:name="android.intent.category.DEFAULT" /> | ||
<category android:name="android.intent.category.BROWSABLE" /> | ||
|
||
<data android:scheme="http" /> | ||
<data android:scheme="https" /> | ||
|
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<data android:host="example.com" /> | ||
<data android:pathPrefix="/gizmos" /> | ||
</intent-filter> | ||
|
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<intent-filter> <!-- Missing VIEW --> | ||
<category android:name="android.intent.category.DEFAULT" /> | ||
<category android:name="android.intent.category.BROWSABLE" /> | ||
|
||
<data android:scheme="http" /> | ||
<data android:scheme="https" /> | ||
|
||
<data android:host="example.com" /> | ||
<data android:pathPrefix="/gizmos" /> | ||
</intent-filter> | ||
|
||
<intent-filter> <!-- Missing DEFAULT --> | ||
<action android:name="android.intent.action.VIEW" /> | ||
<category android:name="android.intent.category.BROWSABLE" /> | ||
|
||
<data android:scheme="http" /> | ||
<data android:scheme="https" /> | ||
|
||
<data android:host="example.com" /> | ||
<data android:pathPrefix="/gizmos" /> | ||
</intent-filter> | ||
|
||
<intent-filter> <!-- Missing BROWSABLE --> | ||
<action android:name="android.intent.action.VIEW" /> | ||
<category android:name="android.intent.category.DEFAULT" /> | ||
|
||
<data android:scheme="http" /> | ||
<data android:scheme="https" /> | ||
|
||
<data android:host="example.com" /> | ||
<data android:pathPrefix="/gizmos" /> | ||
</intent-filter> | ||
|
||
<intent-filter> <!-- Has custom scheme, missing http --> | ||
<action android:name="android.intent.action.VIEW" /> | ||
<category android:name="android.intent.category.DEFAULT" /> | ||
<category android:name="android.intent.category.BROWSABLE" /> | ||
|
||
<data android:scheme="other" /> | ||
|
||
<data android:host="example.com" /> | ||
<data android:pathPrefix="/gizmos" /> | ||
</intent-filter> | ||
|
||
<intent-filter> <!-- Has no scheme --> | ||
<action android:name="android.intent.action.VIEW" /> | ||
<category android:name="android.intent.category.DEFAULT" /> | ||
<category android:name="android.intent.category.BROWSABLE" /> | ||
|
||
<data android:host="example.com" /> | ||
<data android:pathPrefix="/gizmos" /> | ||
</intent-filter> | ||
|
||
<intent-filter> <!-- Missing host --> | ||
<action android:name="android.intent.action.VIEW" /> | ||
<category android:name="android.intent.category.DEFAULT" /> | ||
<category android:name="android.intent.category.BROWSABLE" /> | ||
|
||
<data android:scheme="http" /> | ||
<data android:scheme="https" /> | ||
</intent-filter> | ||
|
||
<intent-filter android:autoVerify="false"> <!-- We would usually expect a warning here, but it has autoVerify="false" --> | ||
<action android:name="android.intent.action.VIEW" /> | ||
<category android:name="android.intent.category.DEFAULT" /> | ||
<category android:name="android.intent.category.BROWSABLE" /> | ||
|
||
<data android:scheme="http" /> | ||
<data android:scheme="https" /> | ||
|
||
<data android:host="example.com" /> | ||
<data android:pathPrefix="/gizmos" /> | ||
</intent-filter> | ||
</activity> | ||
</application> | ||
</manifest> | ||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | ||
|
||
You can also visit the | ||
[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) | ||
for the unit tests for this check to see additional scenarios. | ||
|
||
The above example was automatically extracted from the first unit test | ||
found for this lint check, `AppLinksValidDetector.testAddAutoVerifySuggestion`. | ||
To report a problem with this extracted sample, visit | ||
https://issuetracker.google.com/issues/new?component=192708. | ||
|
||
(##) Suppressing | ||
|
||
You can suppress false positives using one of the following mechanisms: | ||
|
||
* Adding the suppression attribute `tools:ignore="AppLinkWarning"` on | ||
the problematic XML element (or one of its enclosing elements). You | ||
may also need to add the following namespace declaration on the root | ||
element in the XML file if it's not already there: | ||
`xmlns:tools="http://schemas.android.com/tools"`. | ||
|
||
```xml | ||
<?xml version="1.0" encoding="UTF-8"?> | ||
<manifest xmlns:tools="http://schemas.android.com/tools"> | ||
... | ||
<activity tools:ignore="AppLinkWarning" .../> | ||
... | ||
</manifest> | ||
``` | ||
|
||
* Using a special `lint.xml` file in the source tree which turns off | ||
the check in that folder and any sub folder. A simple file might look | ||
like this: | ||
```xml | ||
<?xml version="1.0" encoding="UTF-8"?> | ||
<lint> | ||
<issue id="AppLinkWarning" severity="ignore" /> | ||
</lint> | ||
``` | ||
Instead of `ignore` you can also change the severity here, for | ||
example from `error` to `warning`. You can find additional | ||
documentation on how to filter issues by path, regular expression and | ||
so on | ||
[here](https://googlesamples.github.io/android-custom-lint-rules/usage/lintxml.md.html). | ||
|
||
* In Gradle projects, using the DSL syntax to configure lint. For | ||
example, you can use something like | ||
```gradle | ||
lintOptions { | ||
disable 'AppLinkWarning' | ||
} | ||
``` | ||
In Android projects this should be nested inside an `android { }` | ||
block. | ||
|
||
* For manual invocations of `lint`, using the `--ignore` flag: | ||
``` | ||
$ lint --ignore AppLinkWarning ...` | ||
``` | ||
|
||
* Last, but not least, using baselines, as discussed | ||
[here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html). | ||
|
||
<!-- 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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