โดยสรุปแล้ว การทดสอบเครื่องมือวัดจะสร้างสภาพแวดล้อมการทดสอบพิเศษที่ทำงานผ่านคําสั่ง am instrument ซึ่งจะรีสตาร์ทกระบวนการแอปพลิเคชันเป้าหมายและเริ่มต้นด้วยบริบทแอปพลิเคชันพื้นฐาน และจะเริ่มเธรดเครื่องมือวัดภายใน VM ของกระบวนการแอปพลิเคชัน โค้ดทดสอบจะเริ่มดำเนินการในเธรดเครื่องมือวัดนี้และมีอินสแตนซ์ Instrumentation ที่ให้สิทธิ์เข้าถึงบริบทแอปพลิเคชันและ API เพื่อจัดการกระบวนการของแอปพลิเคชันภายใต้การทดสอบ
[[["เข้าใจง่าย","easyToUnderstand","thumb-up"],["แก้ปัญหาของฉันได้","solvedMyProblem","thumb-up"],["อื่นๆ","otherUp","thumb-up"]],[["ไม่มีข้อมูลที่ฉันต้องการ","missingTheInformationINeed","thumb-down"],["ซับซ้อนเกินไป/มีหลายขั้นตอนมากเกินไป","tooComplicatedTooManySteps","thumb-down"],["ล้าสมัย","outOfDate","thumb-down"],["ปัญหาเกี่ยวกับการแปล","translationIssue","thumb-down"],["ตัวอย่าง/ปัญหาเกี่ยวกับโค้ด","samplesCodeIssue","thumb-down"],["อื่นๆ","otherDown","thumb-down"]],["อัปเดตล่าสุด 2025-07-27 UTC"],[],[],null,["# Instrumentation tests\n\nFirst read [Test your app](https://developer.android.com/studio/test/)\non developer.android.com. Take note there are some differences in\nhow instrumentation tests are used in platform testing.\n\nIn summary, an instrumentation test provides a special test execution\nenvironment as launched via the `am instrument` command, where the targeted\napplication process is restarted and initialized with basic application context,\nand an instrumentation thread is started inside the application process VM. Your\ntest code starts execution on this instrumentation thread and is provided with\nan `Instrumentation` instance that provides access to the application context\nand APIs to manipulate the application process under test.\n\nKey concepts\n------------\n\n- an instrumentation must be declared in an application package, with an [`\u003cinstrumentation\u003e`](https://developer.android.com/guide/topics/manifest/instrumentation-element.html) tag nested under the `\u003cmanifest\u003e` tag of the application package manifest.\n- an application package manifest may technically contain multiple `\u003cinstrumentation\u003e` tags, though it's not commonly used in this fashion.\n- each `\u003cinstrumentation\u003e` must contain:\n - an `android:name` attribute: it should be the name of a subclass of [`Instrumentation`](https://developer.android.com/reference/android/app/Instrumentation.html) that's included in the test application, which is typically the test runner that's being used, e.g.: `android.support.test.runner.AndroidJUnitRunner`\n - an `android:targetPackage` attribute must be defined. Its value should be set to the application package under test.\n\nSummary of steps\n----------------\n\n1. Below are common destinations for hermetic tests against framework services:\n\n frameworks/base/core/tests/coretests\n frameworks/base/services/tests/servicestests\n\n If you are adding a brand new instrumentation module for your component, see\n - [Self-Instrumenting Tests: A Complete Example](/docs/core/tests/development/instr-self-e2e)\n - [Instrumentation Targeting an Application: A Complete Example](/docs/core/tests/development/instr-app-e2e)\n2. Following the existing convention if you are adding tests into one of the\n locations above. If you are setting up a new test module, please follow the\n setup of `AndroidManifest.xml` and `Android.mk` in one of the locations\n above\n\n3. See\n [frameworks/base/core/tests/coretests/](https://android.googlesource.com/platform/frameworks/base.git/+/android16-release/core/tests/coretests/)\n for an example.\n Note these lines install extra apps:\n\n \u003coption name=\"test-file-name\" value=\"FrameworksCoreTests.apk\" /\u003e\n \u003coption name=\"test-file-name\" value=\"BstatsTestApp.apk\" /\u003e\n\n4. Do not forget to mark your test as `@SmallTest`, `@MediumTest` or\n `@LargeTest`\n\n5. Build the test module with m, e.g.:\n\n m FrameworksCoreTests\n\n6. Run the tests:\n\n - The simplest solution is to use\n [Atest](/docs/core/tests/development/atest) like so:\n\n atest FrameworksCoreTests\n\n - Or for more complex tests, use the\n [Trade Federation test Harness](/docs/core/tests/tradefed):\n\n m tradefed-all\n tradefed.sh run template/local_min --template:map test=FrameworksCoreTests\n\n7. If not using Tradefed, manually install and run the tests:\n\n 1. Install the generated apk:\n\n adb install -r ${OUT}/data/app/FrameworksCoreTests/FrameworksCoreTests.apk\n\n | **Tip:** you use `adb shell pm list instrumentation` to find the instrumentations inside the apk just installed\n 1. Run the tests with various options:\n\n 1. all tests in the apk\n\n adb shell am instrument -w com.android.frameworks.coretests\\\n /android.support.test.runner.AndroidJUnitRunner\n\n 2. all tests under a specific Java package\n\n adb shell am instrument -w -e package android.animation \\\n com.android.frameworks.coretests\\\n /android.support.test.runner.AndroidJUnitRunner\n\n 3. all tests under a specific class\n\n adb shell am instrument -w -e class \\\n android.animation.AnimatorSetEventsTest \\\n com.android.frameworks.coretests\\\n /android.support.test.runner.AndroidJUnitRunner\n\n 4. a specific test method\n\n adb shell am instrument -w -e class \\\n android.animation.AnimatorSetEventsTest#testCancel \\\n com.android.frameworks.coretests\\\n /android.support.test.runner.AndroidJUnitRunner\n\nYour test can make an explicit assertion on pass or fail using `JUnit` APIs; in\naddition, any uncaught exceptions will also cause a functional failure.\n\nTo emit performance metrics, your test code can call\n[`Instrumentation#sendStatus`](http://developer.android.com/reference/android/app/Instrumentation.html#sendStatus(int,%20android.os.Bundle))\nto send out a list of key-value pairs. It's important to note that:\n\n1. metrics can be integer or floating point\n2. any non-numerical values will be discarded\n3. your test apk can be either functional tests or metrics tests, however mixing both are not currently supported"]]
