{"id":417,"date":"2023-09-19T13:05:41","date_gmt":"2023-08-05T09:59:03","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%9c%a8kotlin%e4%b8%ad%e4%bd%bf%e7%94%a8android%e7%9a%84sharedpreferences\/"},"modified":"2025-08-02T06:42:44","modified_gmt":"2025-08-01T22:42:44","slug":"%e5%9c%a8kotlin%e4%b8%ad%e4%bd%bf%e7%94%a8android%e7%9a%84sharedpreferences","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8kotlin%e4%b8%ad%e4%bd%bf%e7%94%a8android%e7%9a%84sharedpreferences\/","title":{"rendered":"Kotlin\u5b9e\u73b0Android SharedPreferences\u6570\u636e\u5b58\u50a8\uff1a\u4ece\u5165\u95e8\u5230\u7cbe\u901a"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5728Kotlin\u4e2d\u4f7f\u7528Android\u7684SharedPreferences\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51712\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5185\u5bb9\u7247\u6bb5\uff1a\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u5b66\u4e60\u5982\u4f55\u4f7f\u7528Kotlin\u5728Android\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5b9e\u73b0SharedPreferences\u3002<\/p>\n<h2>\u5b89\u5353\u7684SharedPreferences\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>SharedPreferences\u662fAndroid API\u81eaAPI\u7ea7\u522b1\u8d77\u7684\u4e00\u90e8\u5206\u3002\u5b83\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u5141\u8bb8\u6211\u4eec\u5728\u672c\u5730\u5b58\u50a8\u3001\u4fee\u6539\u548c\u5220\u9664\u6570\u636e\u3002\u901a\u5e38\uff0c\u5b83\u7528\u4e8e\u7f13\u5b58\u7528\u6237\u7684\u672c\u5730\u6570\u636e\uff0c\u5982\u767b\u5f55\u8868\u5355\u3002\u6570\u636e\u4ee5\u952e\u503c\u5bf9\u7684\u5f62\u5f0f\u5b58\u50a8\u3002\u60a8\u53ef\u4ee5\u521b\u5efa\u591a\u4e2a\u6587\u4ef6\u6765\u4fdd\u5b58SharedPreferences\u6570\u636e\u3002<\/p>\n<h2>SharedPreferences\u65b9\u6cd5<\/h2>\n<p>\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e9bSharedPreferences\u7684\u91cd\u8981\u65b9\u6cd5\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>getSharedPreferences(String, int)\u65b9\u6cd5\u7528\u4e8e\u68c0\u7d22SharedPreferences\u7684\u5b9e\u4f8b\u3002\u5176\u4e2dString\u662fSharedPreferences\u6587\u4ef6\u7684\u540d\u79f0\uff0cint\u662f\u4f20\u5165\u7684Context\u6a21\u5f0f\u3002<\/li>\n<li>SharedPreferences.Editor()\u7528\u4e8e\u7f16\u8f91SharedPreferences\u4e2d\u7684\u503c\u3002<\/li>\n<li>\u6211\u4eec\u53ef\u4ee5\u8c03\u7528commit()\u6216apply()\u6765\u4fdd\u5b58SharedPreferences\u6587\u4ef6\u4e2d\u7684\u503c\u3002commit()\u4f1a\u7acb\u5373\u4fdd\u5b58\u503c\uff0c\u800capply()\u4f1a\u5f02\u6b65\u4fdd\u5b58\u503c\u3002<\/li>\n<\/ul>\n<h2>\u4f7f\u7528Kotlin\u8bbe\u7f6e\/\u83b7\u53d6SharedPreferences\u7684\u6570\u503c<\/h2>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Kotlin\u7684\u65b9\u5f0f\u5728SharedPreferences\u5b9e\u4f8b\u4e0a\u8bbe\u7f6e\u503c\uff1a<\/p>\n<pre class=\"post-pre\"><code>val sharedPreference = getSharedPreferences(\"PREFERENCE_NAME\", Context.MODE_PRIVATE)\r\nvar editor = sharedPreference.edit()\r\neditor.putString(\"username\", \"Anupam\")\r\neditor.putLong(\"l\", 100L)\r\neditor.commit()\r\n<\/code><\/pre>\n<p>\u7528\u4e8e\u83b7\u53d6\u4e00\u4e2a\u503c\uff1a<\/p>\n<pre class=\"post-pre\"><code>sharedPreference.getString(\"username\", \"defaultName\")\r\nsharedPreference.getLong(\"l\", 1L)\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564897fa4b2f92e6c73269b\/11-0.png\" alt=\"android shared preference types\" \/><\/div>\n<h2>\u4f7f\u7528Kotlin\u6e05\u9664\u548c\u5220\u9664SharedPreferences\u8bb0\u5f55<\/h2>\n<p>\u6211\u4eec\u8fd8\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528clear()\u548cremove(String key)\u65b9\u6cd5\u6765\u6e05\u9664\u6240\u6709\u503c\u6216\u5220\u9664\u7279\u5b9a\u503c\uff1a<\/p>\n<pre class=\"post-pre\"><code>editor.clear()\r\neditor.remove(\"username\")\r\n<\/code><\/pre>\n<p>\u6ce8\u610f\uff1a\u63d0\u4ea4\u6216\u5e94\u7528\u540e\u5bf9\u7f16\u8f91\u5668\u6240\u505a\u7684\u66f4\u6539\u624d\u4f1a\u751f\u6548\u3002\u4ee5\u4e0a\u4eceSharedPreferences\u4fdd\u5b58\u548c\u68c0\u7d22\u503c\u7684\u65b9\u6cd5\u51e0\u4e4e\u4e0e\u6211\u4eec\u5728Java\u4e2d\u4f7f\u7528\u7684\u65b9\u5f0f\u76f8\u540c\u3002\u90a3\u4e48Kotlin\u7684\u9b54\u529b\u5728\u54ea\u91cc\u5462\uff1f\u63a5\u4e0b\u6765\u6211\u4eec\u5c06\u901a\u8fc7\u4e00\u4e2a\u793a\u4f8b\u7684Android\u5e94\u7528\u7a0b\u5e8f\u8fdb\u884c\u8bf4\u660e\u3002<\/p>\n<h2>Android SharedPreferences Kotlin\u9879\u76ee\u7ed3\u6784<\/h2>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564897fa4b2f92e6c73269b\/17-0.png\" alt=\"android shared preference kotlin project\" \/><\/div>\n<h3>1. \u5e03\u5c40\u4ee3\u7801<\/h3>\n<p>\u4ee5\u4e0b\u662factivity_main.xml\u5e03\u5c40\u6587\u4ef6\u7684\u4ee3\u7801\uff1a<\/p>\n<pre class=\"post-pre\"><code>&lt;?xml version=\"1.0\" encoding=\"utf-8\"?&gt;\r\n&lt;RelativeLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n    android:layout_width=\"match_parent\"\r\n    android:layout_height=\"match_parent\"\r\n    android:orientation=\"vertical\"&gt;\r\n\r\n    &lt;EditText\r\n        android:id=\"@+id\/inUserId\"\r\n        android:layout_width=\"match_parent\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_alignParentTop=\"true\"\r\n        android:hint=\"\u7528\u6237ID\"\r\n        android:inputType=\"number\" \/&gt;\r\n\r\n    &lt;EditText\r\n        android:id=\"@+id\/inPassword\"\r\n        android:layout_width=\"match_parent\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_below=\"@+id\/inUserId\"\r\n        android:hint=\"\u5bc6\u7801\"\r\n        android:inputType=\"textPassword\" \/&gt;\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/btnSave\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_below=\"@+id\/inPassword\"\r\n        android:text=\"\u4fdd\u5b58\u7528\u6237\u6570\u636e\" \/&gt;\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/btnClear\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_alignParentLeft=\"true\"\r\n        android:layout_alignParentStart=\"true\"\r\n        android:layout_below=\"@+id\/btnSave\"\r\n        android:text=\"\u6e05\u9664\u7528\u6237\u6570\u636e\" \/&gt;\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/btnShow\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_alignParentRight=\"true\"\r\n        android:layout_below=\"@+id\/inPassword\"\r\n        android:text=\"\u663e\u793a\" \/&gt;\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/btnShowDefault\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_alignParentEnd=\"true\"\r\n        android:layout_alignParentRight=\"true\"\r\n        android:layout_below=\"@+id\/btnSave\"\r\n        android:text=\"\u663e\u793a\u9ed8\u8ba4\u503c\" \/&gt;\r\n\r\n&lt;\/RelativeLayout&gt;\r\n<\/code><\/pre>\n<h3>2. Kotlin\u4ee3\u7801\u4e2d\u7684MainActivity<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5728Kotlin\u4e2d\u4f7f\u7528Android\u7684SharedPreferences\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51712\u90e8\u5206\uff09\u3002<\/p>\n<p>\u4e0b\u9762\u662fMainActivity.kt Kotlin\u7c7b\u7684\u4ee3\u7801\uff1a<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.androidlysharedpreferences\r\n\r\nimport android.content.Context\r\nimport android.content.SharedPreferences\r\nimport android.support.v7.app.AppCompatActivity\r\nimport android.os.Bundle\r\nimport android.preference.PreferenceManager\r\nimport android.view.View\r\nimport com.Olivia.androidlysharedpreferences.PreferenceHelper.defaultPreference\r\nimport com.Olivia.androidlysharedpreferences.PreferenceHelper.password\r\nimport com.Olivia.androidlysharedpreferences.PreferenceHelper.userId\r\nimport com.Olivia.androidlysharedpreferences.PreferenceHelper.clearValues\r\nimport com.Olivia.androidlysharedpreferences.PreferenceHelper.customPreference\r\n\r\nimport kotlinx.android.synthetic.main.activity_main.*\r\n\r\nclass MainActivity : AppCompatActivity(), View.OnClickListener {\r\n\r\n    val CUSTOM_PREF_NAME = \"User_data\"\r\n\r\n    override fun onCreate(savedInstanceState: Bundle?) {\r\n        super.onCreate(savedInstanceState)\r\n        setContentView(R.layout.activity_main)\r\n\r\n        btnSave.setOnClickListener(this)\r\n        btnClear.setOnClickListener(this)\r\n        btnShow.setOnClickListener(this)\r\n        btnShowDefault.setOnClickListener(this)\r\n\r\n    }\r\n\r\n    override fun onClick(v: View?) {\r\n        val prefs = customPreference(this, CUSTOM_PREF_NAME)\r\n        when (v?.id) {\r\n            R.id.btnSave -> {\r\n                prefs.password = inPassword.text.toString()\r\n                prefs.userId = inUserId.text.toString().toInt()\r\n            }\r\n            R.id.btnClear -> {\r\n                prefs.clearValues\r\n\r\n            }\r\n            R.id.btnShow -> {\r\n                inUserId.setText(prefs.userId.toString())\r\n                inPassword.setText(prefs.password)\r\n            }\r\n            R.id.btnShowDefault -> {\r\n\r\n                val defaultPrefs = defaultPreference(this)\r\n                inUserId.setText(defaultPrefs.userId.toString())\r\n                inPassword.setText(defaultPrefs.password)\r\n            }\r\n        }\r\n    }\r\n\r\n\r\n}\r\n\r\nobject PreferenceHelper {\r\n\r\n    val USER_ID = \"USER_ID\"\r\n    val USER_PASSWORD = \"PASSWORD\"\r\n\r\n    fun defaultPreference(context: Context): SharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)\r\n\r\n    fun customPreference(context: Context, name: String): SharedPreferences = context.getSharedPreferences(name, Context.MODE_PRIVATE)\r\n\r\n    inline fun SharedPreferences.editMe(operation: (SharedPreferences.Editor) -> Unit) {\r\n        val editMe = edit()\r\n        operation(editMe)\r\n        editMe.apply()\r\n    }\r\n\r\n    var SharedPreferences.userId\r\n        get() = getInt(USER_ID, 0)\r\n        set(value) {\r\n            editMe {\r\n                it.putInt(USER_ID, value)\r\n            }\r\n        }\r\n\r\n    var SharedPreferences.password\r\n        get() = getString(USER_PASSWORD, \"\")\r\n        set(value) {\r\n            editMe {\r\n                it.putString(USER_PASSWORD, value)\r\n            }\r\n        }\r\n\r\n    var SharedPreferences.clearValues\r\n        get() = { }\r\n        set(value) {\r\n            editMe {\r\n                it.clear()\r\n            }\r\n        }\r\n}\r\n\r\n\r\n<\/code><\/pre>\n<p>\u591a\u4e8f\u4e86Kotlin Android\u6269\u5c55\uff0c\u6211\u4eec\u4e0d\u5fc5\u4e3a\u6bcf\u4e2aXML\u89c6\u56fe\u4f7f\u7528findViewById\u3002\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528object\u5173\u952e\u5b57\u521b\u5efa\u4e86\u4e00\u4e2a\u5355\u4f8b\u7c7b\u3002\u6211\u4eec\u58f0\u660e\u4e86\u4e00\u4e2a\u5185\u8054\u9ad8\u9636\u51fd\u6570editMe()\uff0c\u5b83\u5305\u542b\u4e86\u7f16\u8f91\u64cd\u4f5c\u7684\u903b\u8f91\u3002\u6211\u4eec\u4e3a\u6bcf\u4e2a\u503c\u521b\u5efa\u4e86\u5355\u72ec\u7684\u5c5e\u6027\u3002\u6211\u4eec\u4f7f\u7528get\u548cset Kotlin\u5c5e\u6027\u6765\u83b7\u53d6\u548c\u8bbe\u7f6e\u5171\u4eab\u9996\u9009\u9879\u4e2d\u7684\u6570\u636e\u3002Kotlin\u51cf\u5c11\u4e86\u4ee3\u7801\u5197\u4f59\uff0c\u5e76\u4e14\u770b\u8d77\u6765\u66f4\u52a0\u6e05\u6670\u3002\u6b64\u5916\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u53e6\u4e00\u4e2aKotlin\u9ad8\u9636\u51fd\u6570\u4f7f\u5176\u66f4\u52a0\u7b80\u6d01\u3002<\/p>\n<pre class=\"post-pre\"><code>fun SharedPreferences.Editor.put(pair: Pair&lt;String, Any&gt;) {\r\n    val key = pair.first\r\n    val value = pair.second\r\n    when(value) {\r\n        is String -> putString(key, value)\r\n        is Int -> putInt(key, value)\r\n        is Boolean -> putBoolean(key, value)\r\n        is Long -> putLong(key, value)\r\n        is Float -> putFloat(key, value)\r\n        else -> error(\"Only primitive types can be stored in SharedPreferences\")\r\n    }\r\n<\/code><\/pre>\n<p>\u5728\u8bbe\u7f6e\u503c\u7684\u540c\u65f6\uff0c\u6211\u4eec\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<pre class=\"post-pre\"><code>var SharedPreferences.password\r\n        get() = getString(USER_PASSWORD, \"\")\r\n        set(value) {\r\n            editMe {\r\n                it.put(USER_PASSWORD to value)\r\n            }\r\n        }\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564897fa4b2f92e6c73269b\/28-0.gif\" alt=\"android shared preferences kotlin app output\" \/><\/div>\n<p>\u60a8\u53ef\u4ee5\u4ece\u4ee5\u4e0b\u94fe\u63a5\u4e0b\u8f7d\u6e90\u4ee3\u7801\uff1a<a href=\"#\">AndroidlySharedPreferences<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5728Kotlin\u4e2d\u4f7f\u7528Android\u7684SharedPreferences\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51712\u90e8\u5206\uff09\u3002 \u5185 [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[900,897,1322,1097,1071],"class_list":["post-417","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-android","tag-kotlin","tag-sharedpreferences","tag-1097","tag-1071"],"yoast_head":"<!-- This site is optimized with the Yoast 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