(#) Wrong case for view tag !!! ERROR: Wrong case for view tag This is an error, and is also enforced at build time when supported by the build system. For Android this means it will run during release builds. Id : `WrongCase` Summary : Wrong case for view tag Severity : Fatal Category : Correctness Platform : Android Vendor : Android Open Source Project Feedback : https://issuetracker.google.com/issues/new?component=192708 Since : Initial Affects : Resource files Editing : This check runs on the fly in the IDE editor See : https://developer.android.com/guide/components/fragments.html 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/WrongCaseDetector.java) 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/WrongCaseDetectorTest.kt) Copyright Year : 2013 Most layout tags, such as ``, refer to actual view classes and are therefore capitalized. However, there are exceptions such as `` and ``. This lint check looks for incorrect capitalizations. !!! 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 res/layout/case.xml:1:Error: Invalid tag ; should be [WrongCase] <Merge xmlns:android="http://schemas.android.com/apk/res/android" > ----- res/layout/case.xml:3:Error: Invalid tag ; should be [WrongCase] <Fragment android:name="foo.bar.Fragment" /> -------- res/layout/case.xml:4:Error: Invalid tag ; should be [WrongCase] <Include layout="@layout/foo" /> ------- res/layout/case.xml:5:Error: Invalid tag ; should be [WrongCase] <RequestFocus /> ------------ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Here is the source file referenced above: `res/layout/case.xml`: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~xml linenumbers <Merge xmlns:android="http://schemas.android.com/apk/res/android" > <Fragment android:name="foo.bar.Fragment" /> <Include layout="@layout/foo" /> <RequestFocus /> </Merge> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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/WrongCaseDetectorTest.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, `WrongCaseDetector.testBasic`. 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="WrongCase"` 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"?> <Fragment xmlns:tools="http://schemas.android.com/tools" tools:ignore="WrongCase" ...> ... </Fragment> ``` * 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="WrongCase" 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 'WrongCase' } ``` In Android projects this should be nested inside an `android { }` block. * For manual invocations of `lint`, using the `--ignore` flag: ``` $ lint --ignore WrongCase ...` ``` * Last, but not least, using baselines, as discussed [here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).