(#) The launcher icon shape should use a distinct silhouette !!! WARNING: The launcher icon shape should use a distinct silhouette This is a warning. Id : `IconLauncherShape` Summary : The launcher icon shape should use a distinct silhouette Severity : Warning Category : Usability: Icons Platform : Android Vendor : Android Open Source Project Feedback : https://issuetracker.google.com/issues/new?component=192708 Since : Initial Affects : Kotlin and Java files, manifest files and resource files Editing : This check can *not* run live in the IDE editor 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/IconDetector.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/IconDetectorTest.java) Copyright Year : 2011 According to the Android Design Guide (https://d.android.com/r/studio-ui/designer/material/iconography) your launcher icons should "use a distinct silhouette", a "three-dimensional, front view, with a slight perspective as if viewed from above, so that users perceive some depth." The unique silhouette implies that your launcher icon should not be a filled square. (##) Suppressing You can suppress false positives using one of the following mechanisms: * Using a suppression annotation like this on the enclosing element: ```kt // Kotlin @Suppress("IconLauncherShape") fun method() { problematicStatement() } ``` or ```java // Java @SuppressWarnings("IconLauncherShape") void method() { problematicStatement(); } ``` * Using a suppression comment like this on the line above: ```kt //noinspection IconLauncherShape problematicStatement() ``` * Adding the suppression attribute `tools:ignore="IconLauncherShape"` 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"> ... <application tools:ignore="IconLauncherShape" .../> ... </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="IconLauncherShape" 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 'IconLauncherShape' } ``` In Android projects this should be nested inside an `android { }` block. * For manual invocations of `lint`, using the `--ignore` flag: ``` $ lint --ignore IconLauncherShape ...` ``` * Last, but not least, using baselines, as discussed [here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).