{"id":186006,"date":"2024-11-11T02:19:22","date_gmt":"2024-11-10T18:19:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186006\/"},"modified":"2024-11-11T02:19:23","modified_gmt":"2024-11-10T18:19:23","slug":"%e6%95%b8%e6%93%9a%e5%ba%absql%e7%b7%a8%e7%a8%8b%e4%b9%8bandroid%e7%af%87","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186006\/","title":{"rendered":"\u6578\u64da\u5eabSQL\u7de8\u7a0b\u4e4bAndroid\u7bc7"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%absql%e7%b7%a8%e7%a8%8b%e4%b9%8bandroid%e7%af%87-OKwQGFFTHL\">\u6578\u64da\u5eabSQL\u7de8\u7a0b\u4e4bAndroid\u7bc7<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u79fb\u52d5\u61c9\u7528\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002Android\u4f5c\u70ba\u4e00\u500b\u4e3b\u6d41\u7684\u79fb\u52d5\u64cd\u4f5c\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u5f0f\u4f86\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u5eab\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728Android\u958b\u767c\u4e2d\u4f7f\u7528SQL\u7de8\u7a0b\u7684\u57fa\u672c\u6982\u5ff5\u3001\u5be6\u73fe\u65b9\u6cd5\u4ee5\u53ca\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"1-android%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e9%81%b8%e6%93%87-OKwQGFFTHL\">1. Android\u4e2d\u7684\u6578\u64da\u5eab\u9078\u64c7<\/h2>\n<p>\u5728Android\u958b\u767c\u4e2d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9078\u64c7\u591a\u7a2e\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u6700\u5e38\u898b\u7684\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>SQLite\uff1a<\/strong>\u9019\u662f\u4e00\u500b\u8f15\u91cf\u7d1a\u7684\u95dc\u806f\u6578\u64da\u5eab\uff0c\u5167\u7f6e\u65bcAndroid\u7cfb\u7d71\u4e2d\uff0c\u9069\u5408\u7528\u65bc\u5c0f\u578b\u61c9\u7528\u3002<\/li>\n<li><strong>Room\uff1a<\/strong>\u9019\u662f\u4e00\u500bAndroid\u67b6\u69cb\u7d44\u4ef6\uff0c\u63d0\u4f9b\u4e86\u4e00\u500b\u62bd\u8c61\u5c64\u4f86\u7c21\u5316SQLite\u7684\u4f7f\u7528\uff0c\u4e26\u63d0\u4f9b\u4e86\u66f4\u597d\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u9ad4\u9a57\u3002<\/li>\n<li><strong>Firebase Realtime Database\uff1a<\/strong>\u9019\u662f\u4e00\u500b\u96f2\u7aef\u6578\u64da\u5eab\uff0c\u9069\u5408\u9700\u8981\u5be6\u6642\u6578\u64da\u540c\u6b65\u7684\u61c9\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8sqlite%e9%80%b2%e8%a1%8c%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c-OKwQGFFTHL\">2. \u4f7f\u7528SQLite\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c<\/h2>\n<p>SQLite\u662fAndroid\u4e2d\u6700\u5e38\u7528\u7684\u6578\u64da\u5eab\uff0c\u56e0\u70ba\u5b83\u4e0d\u9700\u8981\u984d\u5916\u7684\u5b89\u88dd\uff0c\u4e26\u4e14\u80fd\u5920\u5728\u8a2d\u5099\u4e0a\u672c\u5730\u5b58\u5132\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528SQLite\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"2-1-%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab-OKwQGFFTHL\">2.1 \u5275\u5efa\u6578\u64da\u5eab<\/h3>\n<pre><code>public class MyDatabaseHelper extends SQLiteOpenHelper {\n    private static final String DATABASE_NAME = \"mydatabase.db\";\n    private static final int DATABASE_VERSION = 1;\n\n    public MyDatabaseHelper(Context context) {\n        super(context, DATABASE_NAME, null, DATABASE_VERSION);\n    }\n\n    @Override\n    public void onCreate(SQLiteDatabase db) {\n        String CREATE_TABLE = \"CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT, age INTEGER)\";\n        db.execSQL(CREATE_TABLE);\n    }\n\n    @Override\n    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {\n        db.execSQL(\"DROP TABLE IF EXISTS users\");\n        onCreate(db);\n    }\n}<\/code><\/pre>\n<h3 id=\"2-2-%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-OKwQGFFTHL\">2.2 \u63d2\u5165\u6578\u64da<\/h3>\n<pre><code>public void addUser(String name, int age) {\n    SQLiteDatabase db = this.getWritableDatabase();\n    ContentValues values = new ContentValues();\n    values.put(\"name\", name);\n    values.put(\"age\", age);\n    db.insert(\"users\", null, values);\n    db.close();\n}<\/code><\/pre>\n<h3 id=\"2-3-%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-OKwQGFFTHL\">2.3 \u67e5\u8a62\u6578\u64da<\/h3>\n<pre><code>public Cursor getAllUsers() {\n    SQLiteDatabase db = this.getReadableDatabase();\n    return db.rawQuery(\"SELECT * FROM users\", null);\n}<\/code><\/pre>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8room%e9%80%b2%e8%a1%8c%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c-OKwQGFFTHL\">3. \u4f7f\u7528Room\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c<\/h2>\n<p>Room\u63d0\u4f9b\u4e86\u4e00\u500b\u66f4\u9ad8\u5c64\u6b21\u7684API\u4f86\u64cd\u4f5cSQLite\uff0c\u6e1b\u5c11\u4e86\u6a23\u677f\u4ee3\u78bc\u4e26\u63d0\u9ad8\u4e86\u53ef\u8b80\u6027\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528Room\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"3-1-%e5%ae%9a%e7%be%a9%e5%af%a6%e9%ab%94%e9%a1%9e-OKwQGFFTHL\">3.1 \u5b9a\u7fa9\u5be6\u9ad4\u985e<\/h3>\n<pre><code>@Entity(tableName = \"users\")\npublic class User {\n    @PrimaryKey(autoGenerate = true)\n    public int id;\n\n    @ColumnInfo(name = \"name\")\n    public String name;\n\n    @ColumnInfo(name = \"age\")\n    public int age;\n}<\/code><\/pre>\n<h3 id=\"3-2-%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8e%a5%e5%8f%a3-OKwQGFFTHL\">3.2 \u5275\u5efa\u6578\u64da\u5eab\u63a5\u53e3<\/h3>\n<pre><code>@Dao\npublic interface UserDao {\n    @Insert\n    void insert(User user);\n\n    @Query(\"SELECT * FROM users\")\n    List getAllUsers();\n}<\/code><\/pre>\n<h3 id=\"3-3-%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e9%a1%9e-OKwQGFFTHL\">3.3 \u5275\u5efa\u6578\u64da\u5eab\u985e<\/h3>\n<pre><code>@Database(entities = {User.class}, version = 1)\npublic abstract class AppDatabase extends RoomDatabase {\n    public abstract UserDao userDao();\n}<\/code><\/pre>\n<h2 id=\"4-%e7%b8%bd%e7%b5%90-OKwQGFFTHL\">4. \u7e3d\u7d50<\/h2>\n<p>\u5728Android\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u7121\u8ad6\u662f\u4f7f\u7528SQLite\u9084\u662fRoom\uff0c\u958b\u767c\u8005\u90fd\u80fd\u5920\u6709\u6548\u5730\u7ba1\u7406\u61c9\u7528\u4e2d\u7684\u6578\u64da\u3002\u900f\u904e\u672c\u6587\u7684\u4ecb\u7d39\uff0c\u60a8\u61c9\u8a72\u5c0d\u5982\u4f55\u5728Android\u4e2d\u9032\u884cSQL\u7de8\u7a0b\u6709\u4e86\u57fa\u672c\u7684\u4e86\u89e3\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u6280\u8853\u652f\u6301\u6216\u5c0b\u627e\u5408\u9069\u7684\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u7684\u904b\u884c\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Android\u4e2d\u7684\u6578\u64da\u5eabSQL\u7de8\u7a0b\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\u8207\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-186006","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=186006"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186006\/revisions"}],"predecessor-version":[{"id":186007,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186006\/revisions\/186007"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}