(#) Unused quantity translations !!! WARNING: Unused quantity translations This is a warning. Id : `UnusedQuantity` Summary : Unused quantity translations Severity : Warning Category : Correctness: Messages Platform : Android Vendor : Android Open Source Project Feedback : https://issuetracker.google.com/issues/new?component=192708 Affects : Resource files Editing : This check runs on the fly in the IDE editor See : https://developer.android.com/guide/topics/resources/string-resource.html#Plurals 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/PluralsDetector.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/PluralsDetectorTest.java) Copyright Year : 2013 Android defines a number of different quantity strings, such as `zero`, `one`, `few` and `many`. However, many languages do not distinguish grammatically between all these different quantities. This lint check looks at the quantity strings defined for each translation and flags any quantity strings that are unused (because the language does not make that quantity distinction, and Android will therefore not look it up). For example, in Chinese, only the `other` quantity is used, so even if you provide translations for `zero` and `one`, these strings will **not** be returned when `getQuantityString()` is called, even with `0` or `1`. (##) Example Here is an example of lint warnings produced by this check: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~text res/values-zh-rCN/plurals3.xml:3:Warning: For language "zh" (Chinese) the following quantities are not relevant: one [UnusedQuantity] <plurals name="draft"> ^ res/values-zh-rCN/plurals3.xml:7:Warning: For language "zh" (Chinese) the following quantities are not relevant: one [UnusedQuantity] <plurals name="title_day_dialog_content"> ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Here is the source file referenced above: `res/values-zh-rCN/plurals3.xml`: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~xml linenumbers <?xml version="1.0" encoding="UTF-8"?> <resources xmlns:android="http://schemas.android.com/apk/res/android"> <plurals name="draft"> <item quantity="one">"草稿"</item> <item quantity="other">"草稿"</item> </plurals> <plurals name="title_day_dialog_content"> <item quantity="one">"天"</item> <item quantity="other">"天"</item> </plurals> </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/PluralsDetectorTest.java) 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, `PluralsDetector.test2`. 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="UnusedQuantity"` 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"?> <resources xmlns:tools="http://schemas.android.com/tools"> ... <plurals tools:ignore="UnusedQuantity" .../> ... </resources> ``` * 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="UnusedQuantity" 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 'UnusedQuantity' } ``` In Android projects this should be nested inside an `android { }` block. * For manual invocations of `lint`, using the `--ignore` flag: ``` $ lint --ignore UnusedQuantity ...` ``` * Last, but not least, using baselines, as discussed [here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).