(#) Incorrect ObjectAnimator Property !!! ERROR: Incorrect ObjectAnimator Property This is an error. Id : `ObjectAnimatorBinding` Summary : Incorrect ObjectAnimator Property Severity : Error Category : Correctness Platform : Android Vendor : Android Open Source Project Feedback : https://issuetracker.google.com/issues/new?component=192708 Since : 2.3.0 (March 2017) Affects : Kotlin and Java files and resource files Editing : This check runs on the fly 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/ObjectAnimatorDetector.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/ObjectAnimatorDetectorTest.kt) This check cross references properties referenced by String from `ObjectAnimator` and `PropertyValuesHolder` method calls and ensures that the corresponding setter methods exist and have the right signatures. (##) Example Here is an example of lint warnings produced by this check: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~text src/main/java/AnimationExample.java:9:Error: The setter for this property does not match the expected signature (public void setProp2(int arg) [ObjectAnimatorBinding] ObjectAnimator animator2 = ObjectAnimator.ofInt(myObject, "prop2", 0, 1, 2, 5); ------- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Here is the source file referenced above: `src/main/java/AnimationExample.java`: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~java linenumbers import android.animation.ObjectAnimator; public class AnimationExample { public void startAnimations() { Object myObject = new MyObject(); ObjectAnimator animator1 = ObjectAnimator.ofInt(myObject, "prop1", 0, 1, 2, 5); animator1.start(); ObjectAnimator animator2 = ObjectAnimator.ofInt(myObject, "prop2", 0, 1, 2, 5); animator2.start(); } private static class MyObject { public void setProp1(int x) { // Implementation here } private void setProp2(float x) { // Implementation here } } } ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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/ObjectAnimatorDetectorTest.kt) for the unit tests for this check to see additional scenarios. (##) 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("ObjectAnimatorBinding") fun method() { ofInt(...) } ``` or ```java // Java @SuppressWarnings("ObjectAnimatorBinding") void method() { ofInt(...); } ``` * Using a suppression comment like this on the line above: ```kt //noinspection ObjectAnimatorBinding problematicStatement() ``` * Adding the suppression attribute `tools:ignore="ObjectAnimatorBinding"` 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"?> <android.support.constraint.motion.MotionLayout xmlns:tools="http://schemas.android.com/tools" tools:ignore="ObjectAnimatorBinding" ...> ... </android.support.constraint.motion.MotionLayout> ``` * 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="ObjectAnimatorBinding" 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 'ObjectAnimatorBinding' } ``` In Android projects this should be nested inside an `android { }` block. * For manual invocations of `lint`, using the `--ignore` flag: ``` $ lint --ignore ObjectAnimatorBinding ...` ``` * Last, but not least, using baselines, as discussed [here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).