{"id":58367,"date":"2024-10-12T20:10:16","date_gmt":"2024-10-12T12:10:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/58367\/"},"modified":"2024-10-12T20:10:16","modified_gmt":"2024-10-12T12:10:16","slug":"android-studio%ef%bc%9a%e7%b2%be%e9%80%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c-android-studio%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/58367\/","title":{"rendered":"Android Studio\uff1a\u7cbe\u901a\u6578\u64da\u5eab\u64cd\u4f5c (android studio\u6578\u64da\u5eab\u64cd\u4f5c)"},"content":{"rendered":"<h1 id=\"android-studio%ef%bc%9a%e7%b2%be%e9%80%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c-jBzVxfAZUt\">Android Studio\uff1a\u7cbe\u901a\u6578\u64da\u5eab\u64cd\u4f5c<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u79fb\u52d5\u61c9\u7528\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u64cd\u4f5c\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002Android Studio \u4f5c\u70ba Android 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\u662f\u4e00\u500b\u81ea\u5305\u542b\u7684\u6578\u64da\u5eab\uff0c\u7121\u9700\u984d\u5916\u7684\u670d\u52d9\u5668\u652f\u6301\u3002<\/li>\n<li>\u8f15\u91cf\u7d1a\uff1a\u9069\u5408\u79fb\u52d5\u8a2d\u5099\uff0c\u4f54\u7528\u8cc7\u6e90\u5c11\u3002<\/li>\n<li>\u652f\u6301 SQL \u8a9e\u8a00\uff1a\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528\u6a19\u6e96\u7684 SQL \u8a9e\u53e5\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9c%a8-android-studio-%e4%b8%ad%e4%bd%bf%e7%94%a8-sqlite-jBzVxfAZUt\">\u5728 Android Studio \u4e2d\u4f7f\u7528 SQLite<\/h2>\n<p>\u5728 Android Studio \u4e2d\u4f7f\u7528 SQLite \u6578\u64da\u5eab\u7684\u57fa\u672c\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab-jBzVxfAZUt\">1. \u5275\u5efa\u6578\u64da\u5eab<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5275\u5efa\u4e00\u500b\u6578\u64da\u5eab\u985e\uff0c\u7e7c\u627f\u81ea SQLiteOpenHelper\u3002\u9019\u500b\u985e\u5c07\u8ca0\u8cac\u6578\u64da\u5eab\u7684\u5275\u5efa\u548c\u7248\u672c\u7ba1\u7406\u3002<\/p>\n<pre><code>public class DatabaseHelper extends SQLiteOpenHelper {\n    private static final String DATABASE_NAME = \"mydatabase.db\";\n    private static final int DATABASE_VERSION = 1;\n\n    public DatabaseHelper(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-%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-jBzVxfAZUt\">2. \u63d2\u5165\u6578\u64da<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u53ef\u4ee5\u5728\u6578\u64da\u5eab\u4e2d\u63d2\u5165\u6578\u64da\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4f7f\u7528 SQLiteDatabase \u7684 insert \u65b9\u6cd5\u4f86\u5be6\u73fe\u3002<\/p>\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=\"3-%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-jBzVxfAZUt\">3. \u67e5\u8a62\u6578\u64da<\/h3>\n<p>\u67e5\u8a62\u6578\u64da\u662f\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u6700\u5e38\u898b\u7684\u9700\u6c42\u4e4b\u4e00\u3002\u53ef\u4ee5\u4f7f\u7528 SQLiteDatabase \u7684 query \u65b9\u6cd5\u4f86\u5be6\u73fe\u3002<\/p>\n<pre><code>public Cursor getAllUsers() {\n    SQLiteDatabase db = this.getReadableDatabase();\n    return db.query(\"users\", null, null, null, null, null, null);\n}<\/code><\/pre>\n<h3 id=\"4-%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-jBzVxfAZUt\">4. \u66f4\u65b0\u6578\u64da<\/h3>\n<p>\u66f4\u65b0\u6578\u64da\u540c\u6a23\u53ef\u4ee5\u901a\u904e SQLiteDatabase \u7684 update \u65b9\u6cd5\u4f86\u5be6\u73fe\u3002<\/p>\n<pre><code>public void updateUser(int id, 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.update(\"users\", values, \"id = ?\", new String[]{String.valueOf(id)});\n    db.close();\n}<\/code><\/pre>\n<h3 id=\"5-%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-jBzVxfAZUt\">5. \u522a\u9664\u6578\u64da<\/h3>\n<p>\u6700\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 SQLiteDatabase \u7684 delete \u65b9\u6cd5\u4f86\u522a\u9664\u6578\u64da\u3002<\/p>\n<pre><code>public void deleteUser(int id) {\n    SQLiteDatabase db = this.getWritableDatabase();\n    db.delete(\"users\", \"id = ?\", new String[]{String.valueOf(id)});\n    db.close();\n}<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-jBzVxfAZUt\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1 Android Studio \u4e2d\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u5c0d\u65bc\u958b\u767c\u9ad8\u6548\u7684\u79fb\u52d5\u61c9\u7528\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528 SQLite\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u9032\u884c\u6578\u64da\u7684\u5275\u5efa\u3001\u67e5\u8a62\u3001\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\u3002\u96a8\u8457\u6280\u8853\u7684\u9032\u6b65\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u5c07\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\uff0c\u4e86\u89e3\u5176\u57fa\u672c\u64cd\u4f5c\u5c07\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u66f4\u5927\u7684\u9748\u6d3b\u6027\u548c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u958b\u767c\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5b58\u5132\u9084\u662f\u61c9\u7528\u90e8\u7f72\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1Android Studio\u4e2d\u7684\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u7ba1\u7406\u548c\u5b58\u53d6\u6578\u64da\uff0c\u63d0\u5347\u61c9\u7528\u7a0b\u5f0f\u6027\u80fd\u8207\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-58367","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/58367","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=58367"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/58367\/revisions"}],"predecessor-version":[{"id":58368,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/58367\/revisions\/58368"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=58367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=58367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=58367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}