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KeyValueStore
public
interface
KeyValueStore
android.adservices.ondevicepersonalization.KeyValueStore
|
指向只读键值对存储区的接口。
用作 REMOTE_DATA 表的数据访问对象。
摘要
公共方法
get
public abstract byte[] get (String key)
在只读存储区中查找键。
此方法可能需要几秒钟才能完成,因此仅应从工作器线程调用。
参数 |
key |
String :要查找的键。
此值不能为 null 。 |
返回 |
byte[] |
指定的键映射到的值,如果没有针对键的映射,则返回 null。 |
keySet
public abstract Set<String> keySet ()
返回 REMOTE_DATA 表中包含的键的 Set 视图。
此方法可能需要几秒钟才能完成,因此仅应从工作器线程调用。
本页面上的内容和代码示例受内容许可部分所述许可的限制。Java 和 OpenJDK 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-07-27。
[null,null,["最后更新时间 (UTC):2025-07-27。"],[],[],null,["# KeyValueStore\n\n[**Added in Android UpsideDownCakePrivacySandbox**](/preview) \nSummary: [Methods](#pubmethods) \n\nKeyValueStore\n=============\n\n\n`\npublic\n\n\ninterface\nKeyValueStore\n`\n\n\n`\n\n\n`\n\n|----------------------------------------------------------|\n| android.adservices.ondevicepersonalization.KeyValueStore |\n\n|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| Known indirect subclasses [MutableKeyValueStore](/design-for-safety/privacy-sandbox/reference/adservices/ondevicepersonalization/MutableKeyValueStore) |------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------| | [MutableKeyValueStore](/design-for-safety/privacy-sandbox/reference/adservices/ondevicepersonalization/MutableKeyValueStore) | An interface to a read-write key-value store. | |\n\n\u003cbr /\u003e\n\n*** ** * ** ***\n\nAn interface to a read-only key-value store.\n\nUsed as a Data Access Object for the REMOTE_DATA table. \n**See also:**\n\n- [IsolatedService.getRemoteData(RequestToken)](/design-for-safety/privacy-sandbox/reference/adservices/ondevicepersonalization/IsolatedService#getRemoteData(android.adservices.ondevicepersonalization.RequestToken))\n\nSummary\n-------\n\n| ### Public methods ||\n|----------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| ` abstract byte[]` | ` `[get](/design-for-safety/privacy-sandbox/reference/adservices/ondevicepersonalization/KeyValueStore#get(java.lang.String))`(`[String](/reference/java/lang/String)` key) ` Looks up a key in a read-only store. |\n| ` abstract `[Set](/reference/java/util/Set)`\u003c`[String](/reference/java/lang/String)`\u003e` | ` `[keySet](/design-for-safety/privacy-sandbox/reference/adservices/ondevicepersonalization/KeyValueStore#keySet())`() ` Returns a Set view of the keys contained in the REMOTE_DATA table. |\n\nPublic methods\n--------------\n\n### get\n\n[**Added in Android UpsideDownCakePrivacySandbox**](/preview) \n\n```\npublic abstract byte[] get (String key)\n```\n\nLooks up a key in a read-only store.\n\n\u003cbr /\u003e\n\n\nThis method may take several seconds to complete, so it should\nonly be called from a worker thread.\n\n\u003cbr /\u003e\n\n| Parameters ||\n|-------|-------------------------------------------------------------------|\n| `key` | `String`: The key to look up. This value cannot be `null`. \u003cbr /\u003e |\n\n| Returns ||\n|----------|----------------------------------------------------------------------------------------------------------|\n| `byte[]` | the value to which the specified key is mapped, or null if there contains no mapping for the key. \u003cbr /\u003e |\n\n### keySet\n\n[**Added in Android UpsideDownCakePrivacySandbox**](/preview) \n\n```\npublic abstract Set\u003cString\u003e keySet ()\n```\n\nReturns a Set view of the keys contained in the REMOTE_DATA table.\n\n\u003cbr /\u003e\n\n\nThis method may take several seconds to complete, so it should\nonly be called from a worker thread.\n\n\u003cbr /\u003e\n\n| Returns ||\n|----------------------------------------------------------------------------|-------------------------------------|\n| [Set](/reference/java/util/Set)`\u003c`[String](/reference/java/lang/String)`\u003e` | This value cannot be `null`. \u003cbr /\u003e |"]]