סקירה כללית על תכונות וממשקי API

ב-Android 14 נוספו תכונות וממשקי API מעולים למפתחים. המאמרים הבאים יעזרו לכם להבין את התכונות של האפליקציות ולהתחיל להשתמש בממשקי ה-API שקשורים אליהן.

רשימה מפורטת של ממשקי API שנוספו, שונו או הוסרו מופיעה בדוח ההבדלים בין ממשקי ה-API. פרטים על ממשקי API שנוספו זמינים בהפניה ל-Android API. ב-Android 14, מחפשים ממשקי API שנוספו ברמת API‏ 34. כדי לקבל מידע על תחומים שבהם שינויים בפלטפורמה עשויים להשפיע על האפליקציות שלכם, כדאי לעיין בשינויים בהתנהגות ב-Android 14 באפליקציות שמטרגטות ל-Android 14 ובכל האפליקציות.

אינטרנציונליזציה

העדפות שפה לכל אפליקציה

Android 14 expands on the per-app language features that were introduced in Android 13 (API level 33) with these additional capabilities:

  • Automatically generate an app's localeConfig: Starting with Android Studio Giraffe Canary 7 and AGP 8.1.0-alpha07, you can configure your app to support per-app language preferences automatically. Based on your project resources, the Android Gradle plugin generates the LocaleConfig file and adds a reference to it in the final manifest file, so you no longer have to create or update the file manually. AGP uses the resources in the res folders of your app modules and any library module dependencies to determine the locales to include in the LocaleConfig file.

  • Dynamic updates for an app's localeConfig: Use the setOverrideLocaleConfig() and getOverrideLocaleConfig() methods in LocaleManager to dynamically update your app's list of supported languages in the device's system settings. Use this flexibility to customize the list of supported languages per region, run A/B experiments, or provide an updated list of locales if your app utilizes server-side pushes for localization.

  • App language visibility for input method editors (IMEs): IMEs can utilize the getApplicationLocales() method to check the language of the current app and match the IME language to that language.

Grammatical Inflection API

3 billion people speak gendered languages: languages where grammatical categories—such as nouns, verbs, adjectives, and prepositions—inflect according to the gender of people and objects you talk to or about. Traditionally, many gendered languages use masculine grammatical gender as the default or generic gender.

Addressing users in the wrong grammatical gender, such as addressing women in masculine grammatical gender, can negatively impact their performance and attitude. In contrast, a UI with language that correctly reflects the user's grammatical gender can improve user engagement and provide a more personalized and natural-sounding user experience.

To help you build a user-centric UI for gendered languages, Android 14 introduces the Grammatical Inflection API, which lets you add support for grammatical gender without refactoring your app.

העדפות הפורמט והמידות

העדפות אזוריות מאפשרות למשתמשים להתאים אישית את יחידות הטמפרטורה, את היום הראשון בשבוע ואת מערכות המספור. אירופאי שגר בארצות הברית עשוי להעדיף יחידות טמפרטורה בצלזיוס ולא בפרנהייט אפליקציות להתייחס ליום שני כתחילת השבוע במקום כברירת המחדל בארה"ב יום ראשון.

תפריטי ההגדרות החדשים של Android עבור ההעדפות האלה מספקים למשתמשים מיקום מרכזי ונגיש לשינוי העדפות האפליקציות. האלה גם בגיבוי ובשחזור. כמה ממשקי API וכוונות (intents) – כמו getTemperatureUnit ו-getFirstDayOfWeek – מעניקים לאפליקציה הרשאת קריאה להעדפות המשתמש, כדי שהיא תוכל לשנות את אופן הצגת המידע. אפשר גם לרשום BroadcastReceiver במצב פעיל ACTION_LOCALE_CHANGED כדי לטפל בשינויים בתצורת הלוקאל כשיש שינוי בהעדפות הפורמט והמידות.

כדי למצוא את ההגדרות האלה, צריך לפתוח את אפליקציית ההגדרות ולעבור אל מערכת > שפות קלט > העדפות אזוריות.

מסך העדפות האזור בהגדרות המערכת של Android.
אפשרויות הטמפרטורה להעדפות אזוריות במערכת Android הגדרות.

נגישות

הגדלה לא לינארית של הגופן עד 200%

Starting in Android 14, the system supports font scaling up to 200%, providing users with additional accessibility options.

To prevent large text elements on screen from scaling too large, the system applies a nonlinear scaling curve. This scaling strategy means that large text doesn't scale at the same rate as smaller text. Nonlinear font scaling helps preserve the proportional hierarchy between elements of different sizes while mitigating issues with linear text scaling at high degrees (such as text being cut off or text that becomes harder to read due to an extremely large display sizes).

Test your app with nonlinear font scaling

Enable the maximum font size in a device's accessibility settings to test your app.

If you already use scaled pixels (sp) units to define text sizing, then these additional options and scaling improvements are applied automatically to the text in your app. However, you should still perform UI testing with the maximum font size enabled (200%) to ensure that your app applies the font sizes correctly and can accommodate larger font sizes without impacting usability.

To enable 200% font size, follow these steps:

  1. Open the Settings app and navigate to Accessibility > Display size and text.
  2. For the Font size option, tap the plus (+) icon until the maximum font size setting is enabled, as shown in the image that accompanies this section.

Use scaled pixel (sp) units for text-sizes

Remember to always specify text sizes in sp units. When your app uses sp units, Android can apply the user's preferred text size and scale it appropriately.

Don't use sp units for padding or define view heights assuming implicit padding: with nonlinear font scaling sp dimensions might not be proportional, so 4sp + 20sp might not equal 24sp.

Convert scaled pixel (sp) units

Use TypedValue.applyDimension() to convert from sp units to pixels, and use TypedValue.deriveDimension() to convert pixels to sp. These methods apply the appropriate nonlinear scaling curve automatically.

Avoid hardcoding equations using Configuration.fontScale or DisplayMetrics.scaledDensity. Because font scaling is nonlinear, the scaledDensity field is no longer accurate. The fontScale field should be used for informational purposes only because fonts are no longer scaled with a single scalar value.

Use sp units for lineHeight

Always define android:lineHeight using sp units instead of dp, so the line height scales along with your text. Otherwise, if your text is sp but your lineHeight is in dp or px, it doesn't scale and looks cramped. TextView automatically corrects the lineHeight so that your intended proportions are preserved, but only if both textSize and lineHeight are defined in sp units.

מצלמה ומדיה

Ultra HDR לתמונות

איור של איכות תמונה בטווח דינמי סטנדרטי (SDR) לעומת איכות תמונה בטווח דינמי גבוה (HDR).

ב-Android 14 נוספה תמיכה בתמונות באיכות HDR (טווח דינמי גבוה), שמאפשרות לשמור יותר מידע מהחיישן בזמן הצילום, וכך לייצר צבעים עזים וניגודיות גבוהה יותר. ב-Android נעשה שימוש בפורמט Ultra HDR, שהוא תואם לאחור לתמונות JPEG. כך האפליקציות יכולות לפעול בצורה חלקה עם תמונות HDR ולהציג אותן בטווח דינמי סטנדרטי (SDR) לפי הצורך.

המערכת מבצעת את העיבוד של התמונות האלה בממשק המשתמש ב-HDR באופן אוטומטי כשהאפליקציה בוחרת להשתמש בממשק משתמש ב-HDR בחלון הפעילות שלה, דרך רשומה במניפסט או במהלך זמן הריצה על ידי קריאה ל-Window.setColorMode(). אפשר גם לצלם תמונות סטילס דחוסות ב-Ultra HDR במכשירים נתמכים. כשהחיישן משחזר יותר צבעים, אפשר לערוך את התמונות בצורה גמישה יותר. אפשר להשתמש ב-Gainmap שמשויך לתמונות Ultra HDR כדי ליצור רינדור שלהן באמצעות OpenGL או Vulkan.

זום, מיקוד, תצוגה מקדימה ועוד בתוספים למצלמה

Android 14 upgrades and improves camera extensions, allowing apps to handle longer processing times, which enables improved images using compute-intensive algorithms like low-light photography on supported devices. These features give users an even more robust experience when using camera extension capabilities. Examples of these improvements include:

זום בחיישן

When REQUEST_AVAILABLE_CAPABILITIES_STREAM_USE_CASE in CameraCharacteristics contains SCALER_AVAILABLE_STREAM_USE_CASES_CROPPED_RAW, your app can use advanced sensor capabilities to give a cropped RAW stream the same pixels as the full field of view by using a CaptureRequest with a RAW target that has stream use case set to CameraMetadata.SCALER_AVAILABLE_STREAM_USE_CASES_CROPPED_RAW. By implementing the request override controls, the updated camera gives users zoom control even before other camera controls are ready.

אודיו ב-USB ללא אובדן נתונים

Android 14 gains support for lossless audio formats for audiophile-level experiences over USB wired headsets. You can query a USB device for its preferred mixer attributes, register a listener for changes in preferred mixer attributes, and configure mixer attributes using the AudioMixerAttributes class. This class represents the format, such as channel mask, sample rate, and behavior of the audio mixer. The class allows for audio to be sent directly, without mixing, volume adjustment, or processing effects.

פרודוקטיביות וכלים למפתחים

מנהל פרטי הכניסה

Android 14 adds Credential Manager as a platform API, with additional support back to Android 4.4 (API level 19) devices through a Jetpack Library using Google Play services. Credential Manager aims to make sign-in easier for users with APIs that retrieve and store credentials with user-configured credential providers. Credential Manager supports multiple sign-in methods, including username and password, passkeys, and federated sign-in solutions (such as Sign-in with Google) in a single API.

Passkeys provide many advantages. For example, passkeys are built on industry standards, can work across different operating systems and browser ecosystems, and can be used with both websites and apps.

For more information, see the Credential Manager and passkeys documentation and the blogpost about Credential Manager and passkeys.

Health Connect

Health Connect is an on-device repository for user health and fitness data. It allows users to share data between their favorite apps, with a single place to control what data they want to share with these apps.

On devices running Android versions prior to Android 14, Health Connect is available to download as an app on the Google Play store. Starting with Android 14, Health Connect is part of the platform and receives updates through Google Play system updates without requiring a separate download. With this, Health Connect can be updated frequently, and your apps can rely on Health Connect being available on devices running Android 14 or higher. Users can access Health Connect from the Settings in their device, with privacy controls integrated into the system settings.

Users can get started using Health Connect without a separate app download on devices running Android 14 or higher.
Users can control which apps have access to their health and fitness data through system settings.

Health Connect includes several new features in Android 14, such as exercise routes, allowing users to share a route of their workout which can be visualized on a map. A route is defined as a list of locations saved within a window of time, and your app can insert routes into exercise sessions, tying them together. To ensure that users have complete control over this sensitive data, users must allow sharing individual routes with other apps.

For more information, see the Health Connection documentation and the blogpost on What's new in Android Health.

עדכונים ל-OpenJDK 17

ב-Android 14 אנחנו ממשיכים לעדכן את ספריות הליבה של Android כדי להתאים אותן לתכונות בגרסאות OpenJDK LTS האחרונות, כולל עדכוני ספריות ותמיכה בשפה Java 17 למפתחי אפליקציות ופלטפורמות.

התכונות והשיפורים הבאים כלולים:

  • עדכנו כ-300 כיתות java.base לתמיכה ב-Java 17.
  • Text Blocks, שמאפשרים להשתמש במחרוזות מילולית של כמה שורות בשפת התכנות Java.
  • התאמת דפוסים ל-instanceof, שמאפשרת להתייחס לאובייקט כאל אובייקט מסוג ספציפי ב-instanceof בלי משתנים נוספים.
  • כיתות אטומות, שמאפשרות להגביל את המחלקות והממשקים שיכולים להרחיב אותם או להטמיע אותם.

בזכות עדכוני המערכת של Google Play (Project Mainline), יותר מ-600 מיליון מכשירים יכולים לקבל את עדכוני Android Runtime (ART) האחרונים שכוללים את השינויים האלה. זהו חלק מהמחויבות שלנו לספק לאפליקציות סביבה עקבית ומאובטחת יותר במכשירים שונים, ולספק למשתמשים תכונות ויכולות חדשות ללא קשר למהדורות הפלטפורמה.

Java ו-OpenJDK הם סימנים מסחריים או סימנים מסחריים רשומים של Oracle ו/או של השותפים העצמאיים שלה.

שיפורים בחנויות אפליקציות

Android 14 introduces several PackageInstaller APIs that allow app stores to improve their user experience.

Request install approval before downloading

Installing or updating an app might require user approval. For example, when an installer making use of the REQUEST_INSTALL_PACKAGES permission attempts to install a new app. In prior Android versions, app stores can only request user approval after APKs are written to the install session and the session is committed.

Starting with Android 14, the requestUserPreapproval() method lets installers request user approval before committing the install session. This improvement lets an app store defer downloading any APKs until after the installation has been approved by the user. Furthermore, once a user has approved installation, the app store can download and install the app in the background without interrupting the user.

Claim responsibility for future updates

The setRequestUpdateOwnership() method allows an installer to indicate to the system that it intends to be responsible for future updates to an app it is installing. This capability enables update ownership enforcement, meaning that only the update owner is permitted to install automatic updates to the app. Update ownership enforcement helps to ensure that users receive updates only from the expected app store.

Any other installer, including those making use of the INSTALL_PACKAGES permission, must receive explicit user approval in order to install an update. If a user decides to proceed with an update from another source, update ownership is lost.

Update apps at less-disruptive times

App stores typically want to avoid updating an app that is actively in use because this leads to the app's running processes being killed, which potentially interrupts what the user was doing.

Starting with Android 14, the InstallConstraints API gives installers a way to ensure that their app updates happen at an opportune moment. For example, an app store can call the commitSessionAfterInstallConstraintsAreMet() method to make sure that an update is only committed when the user is no longer interacting with the app in question.

Seamlessly install optional splits

With split APKs, features of an app can be delivered in separate APK files, rather than as a monolithic APK. Split APKs allow app stores to optimize the delivery of different app components. For example, app stores might optimize based on the properties of the target device. The PackageInstaller API has supported splits since its introduction in API level 22.

In Android 14, the setDontKillApp() method allows an installer to indicate that the app's running processes shouldn't be killed when new splits are installed. App stores can use this feature to seamlessly install new features of an app while the user is using the app.

חבילות של מטא-נתונים של אפליקציות

Starting in Android 14, the Android package installer lets you specify app metadata, such as data safety practices, to include on app store pages such as Google Play.

זיהוי מתי משתמשים מצלמים מסך במכשיר

כדי ליצור חוויה סטנדרטית יותר לזיהוי צילומי מסך, ב-Android 14 מוצג API לזיהוי צילומי מסך ששומר על הפרטיות. ה-API הזה מאפשר לאפליקציות לרשום פונקציות קריאה חוזרת על בסיס כל פעילות. הקריאות החוזרות האלה מופעלות, והמשתמש מקבל הודעה, כשהמשתמש מצלם צילום מסך בזמן שהפעילות הזו גלויה.

חוויית משתמש

פעולות מותאמות אישית ודירוג משופר של קובץ לשיתוף

Android 14 updates the system sharesheet to support custom app actions and more informative preview results for users.

Add custom actions

With Android 14, your app can add custom actions to the system sharesheet it invokes.

Screenshot of custom actions on the sharesheet.

Improve ranking of Direct Share targets

Android 14 uses more signals from apps to determine the ranking of the direct share targets to provide more helpful results for the user. To provide the most useful signal for ranking, follow the guidance for improving rankings of your Direct Share targets. Communication apps can also report shortcut usage for outgoing and incoming messages.

Direct Share row in the sharesheet, as shown by 1

תמיכה באנימציות מובנות ומותאמות אישית לחיזוי של תנועת החזרה

Video: Predictive back animations

Android 13 introduced the predictive back-to-home animation behind a developer option. When used in a supported app with the developer option enabled, swiping back shows an animation indicating that the back gesture exits the app back to the home screen.

Android 14 includes multiple improvements and new guidance for Predictive Back:

With this Android 14 preview release, all features of Predictive Back remain behind a developer option. See the developer guide to migrate your app to predictive back, as well as the developer guide to creating custom in-app transitions.

ביטולים של הגדרות ברירת המחדל לכל אפליקציה בנפרד על ידי יצרן מכשיר עם מסך גדול

Per-app overrides enable device manufacturers to change the behavior of apps on large screen devices. For example, the FORCE_RESIZE_APP override instructs the system to resize the app to fit display dimensions (avoiding size compatibility mode) even if resizeableActivity="false" is set in the app manifest.

Overrides are intended to improve the user experience on large screens.

New manifest properties enable you to disable some device manufacturer overrides for your app.

הגדרות ברירת מחדל שונות לכל אפליקציה למשתמשים במסכים גדולים

Per-app overrides change the behavior of apps on large screen devices. For example, the OVERRIDE_MIN_ASPECT_RATIO_LARGE device manufacturer override sets the app aspect ratio to 16:9 regardless of the app's configuration.

Android 14 QPR1 enables users to apply per‑app overrides by means of a new settings menu on large screen devices.

שיתוף מסך של אפליקציה

App screen sharing enables users to share an app window instead of the entire device screen during screen content recording.

With app screen sharing, the status bar, navigation bar, notifications, and other system UI elements are excluded from the shared display. Only the content of the selected app is shared.

App screen sharing improves productivity and privacy by enabling users to run multiple apps but limit content sharing to a single app.

תשובה מהירה מבוססת-LLM ב-Gboard ב-Pixel 8 Pro

On Pixel 8 Pro devices with the December Feature Drop, developers can try out higher-quality smart replies in Gboard powered by on-device Large Language Models (LLMs) running on Google Tensor.

This feature is available as a limited preview for US English in WhatsApp, Line, and KakaoTalk. It requires using a Pixel 8 Pro device with Gboard as your keyboard.

To try it out, first enable the feature in Settings > Developer Options > AiCore Settings > Enable Aicore Persistent.

Next, open a conversation in a supported app to see LLM-powered Smart Reply in Gboard's suggestion strip in response to incoming messages.

Gboard utilizes on-device LLMs to provide higher-quality smart replies.

גרפיקה

אפשר להריץ שאילתות על נתיבים ולבצע אינטרפולציה שלהם

Android's Path API is a powerful and flexible mechanism for creating and rendering vector graphics, with the ability to stroke or fill a path, construct a path from line segments or quadratic or cubic curves, perform boolean operations to get even more complex shapes, or all of these simultaneously. One limitation is the ability to find out what is actually in a Path object; the internals of the object are opaque to callers after creation.

To create a Path, you call methods such as moveTo(), lineTo(), and cubicTo() to add path segments. But there has been no way to ask that path what the segments are, so you must retain that information at creation time.

Starting in Android 14, you can query paths to find out what's inside of them. First, you need to get a PathIterator object using the Path.getPathIterator API:

Kotlin

val path = Path().apply {
    moveTo(1.0f, 1.0f)
    lineTo(2.0f, 2.0f)
    close()
}
val pathIterator = path.pathIterator

Java

Path path = new Path();
path.moveTo(1.0F, 1.0F);
path.lineTo(2.0F, 2.0F);
path.close();
PathIterator pathIterator = path.getPathIterator();

Next, you can call PathIterator to iterate through the segments one by one, retrieving all of the necessary data for each segment. This example uses PathIterator.Segment objects, which packages up the data for you:

Kotlin

for (segment in pathIterator) {
    println("segment: ${segment.verb}, ${segment.points}")
}

Java

while (pathIterator.hasNext()) {
    PathIterator.Segment segment = pathIterator.next();
    Log.i(LOG_TAG, "segment: " + segment.getVerb() + ", " + segment.getPoints());
}

PathIterator also has a non-allocating version of next() where you can pass in a buffer to hold the point data.

One of the important use cases of querying Path data is interpolation. For example, you might want to animate (or morph) between two different paths. To further simplify that use case, Android 14 also includes the interpolate() method on Path. Assuming the two paths have the same internal structure, the interpolate() method creates a new Path with that interpolated result. This example returns a path whose shape is halfway (a linear interpolation of .5) between path and otherPath:

Kotlin

val interpolatedResult = Path()
if (path.isInterpolatable(otherPath)) {
    path.interpolate(otherPath, .5f, interpolatedResult)
}

Java

Path interpolatedResult = new Path();
if (path.isInterpolatable(otherPath)) {
    path.interpolate(otherPath, 0.5F, interpolatedResult);
}

The Jetpack graphics-path library enables similar APIs for earlier versions of Android as well.

רשתות מותאמות אישית עם הצללות של קודקודים ושל פרגמנטים

Android has long supported drawing triangle meshes with custom shading, but the input mesh format has been limited to a few predefined attribute combinations. Android 14 adds support for custom meshes, which can be defined as triangles or triangle strips, and can, optionally, be indexed. These meshes are specified with custom attributes, vertex strides, varying, and vertex and fragment shaders written in AGSL.

The vertex shader defines the varyings, such as position and color, while the fragment shader can optionally define the color for the pixel, typically by using the varyings created by the vertex shader. If color is provided by the fragment shader, it is then blended with the current Paint color using the blend mode selected when drawing the mesh. Uniforms can be passed into the fragment and vertex shaders for additional flexibility.

מעבד מאגר נתונים זמני של חומרה ל-Canvas

To assist in using Android's Canvas API to draw with hardware acceleration into a HardwareBuffer, Android 14 introduces HardwareBufferRenderer. This API is particularly useful when your use case involves communication with the system compositor through SurfaceControl for low-latency drawing.