(#) Unsafe intent launched with no action set !!! WARNING: Unsafe intent launched with no action set This is a warning. Id : `IntentWithNullActionLaunch` Summary : Unsafe intent launched with no action set Severity : Warning Category : Security Platform : Android Vendor : Android Open Source Project Feedback : https://issuetracker.google.com/issues/new?component=192708 Since : 8.2.0 (November 2023) Affects : Kotlin and Java files and manifest 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/IntentWillNullActionDetector.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/IntentWillNullActionDetectorTest.kt) Intents that have no action and do not specify a component are a potential security risk, and using them will result in a crash in an upcoming version of Android. If a specific app is being targeted (including the case where the current app is the target) then set the targeted component using `setComponent()`, `setClass()`, `setClassName()`, or the Intent constructors that take a Class parameter. If the intent is not intended for a specific app then the action name should be set. !!! 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 src/test/pkg/TestActivity.java:10:Warning: This intent has no action set and is not explicit by component. You should either make this intent explicit by component or set an action matching the targeted intent filter. [IntentWithNullActionLaunch] Intent intent = new Intent(); ------------ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Here is the source file referenced above: `src/test/pkg/TestActivity.java`: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~java linenumbers package test.pkg; import android.content.Intent; import android.app.Activity; public class TestActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { Intent intent = new Intent(); startActivity(intent); } } ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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/IntentWillNullActionDetectorTest.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("IntentWithNullActionLaunch") fun method() { Intent(...) } ``` or ```java // Java @SuppressWarnings("IntentWithNullActionLaunch") void method() { new Intent(...); } ``` * Using a suppression comment like this on the line above: ```kt //noinspection IntentWithNullActionLaunch problematicStatement() ``` * Adding the suppression attribute `tools:ignore="IntentWithNullActionLaunch"` 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"`. * 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="IntentWithNullActionLaunch" 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 'IntentWithNullActionLaunch' } ``` In Android projects this should be nested inside an `android { }` block. * For manual invocations of `lint`, using the `--ignore` flag: ``` $ lint --ignore IntentWithNullActionLaunch ...` ``` * Last, but not least, using baselines, as discussed [here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).