{"id":15745,"date":"2024-03-15T11:40:35","date_gmt":"2024-03-15T11:40:35","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-connect-a-database-in-android-gridview\/"},"modified":"2025-08-06T21:12:10","modified_gmt":"2025-08-06T21:12:10","slug":"how-to-connect-a-database-in-android-gridview","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-connect-a-database-in-android-gridview\/","title":{"rendered":"How to connect a database in Android GridView?"},"content":{"rendered":"<p>To connect a database in Android GridView, you can follow these steps:<\/p>\n<ol>\n<li>The document named build.gradle.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>implementation 'androidx.room:room-runtime:2.2.6'\r\nannotationProcessor 'androidx.room:room-compiler:2.2.6'\r\n<\/code><\/pre>\n<ol>\n<li>This is an entity.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@Entity(tableName = \"items\")<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Item<\/span> {\r\n    <span class=\"hljs-meta\">@PrimaryKey<\/span>\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-type\">int<\/span> id;\r\n    <span class=\"hljs-keyword\">public<\/span> String name;\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>@Martial Arts practitionere<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@Dao<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title class_\">ItemDao<\/span> {\r\n    <span class=\"hljs-meta\">@Query(\"SELECT * FROM items\")<\/span>\r\n    List&lt;Item&gt; <span class=\"hljs-title function_\">getAllItems<\/span><span class=\"hljs-params\">()<\/span>;\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u5176\u4ed6\u6570\u636e\u5e93\u64cd\u4f5c\u65b9\u6cd5...<\/span>\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Database specifically designed for use within a single room or space.<\/li>\n<li>The database<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@Database(entities = {Item.class}, version = 1)<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">abstract<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">AppDatabase<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title class_\">RoomDatabase<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">abstract<\/span> ItemDao <span class=\"hljs-title function_\">getItemDao<\/span><span class=\"hljs-params\">()<\/span>;\r\n\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> AppDatabase instance;\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">synchronized<\/span> AppDatabase <span class=\"hljs-title function_\">getInstance<\/span><span class=\"hljs-params\">(Context context)<\/span> {\r\n        <span class=\"hljs-keyword\">if<\/span> (instance == <span class=\"hljs-literal\">null<\/span>) {\r\n            instance = Room.databaseBuilder(context.getApplicationContext(),\r\n                    AppDatabase.class, <span class=\"hljs-string\">\"app_database\"<\/span>)\r\n                    .allowMainThreadQueries()\r\n                    .build();\r\n        }\r\n        <span class=\"hljs-keyword\">return<\/span> instance;\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Initialize and use the database in your Activity or Fragment class using the following code:<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">AppDatabase<\/span> <span class=\"hljs-variable\">db<\/span> <span class=\"hljs-operator\">=<\/span> AppDatabase.getInstance(getApplicationContext());\r\n<span class=\"hljs-type\">ItemDao<\/span> <span class=\"hljs-variable\">itemDao<\/span> <span class=\"hljs-operator\">=<\/span> db.getItemDao();\r\n\r\n<span class=\"hljs-comment\">\/\/ \u67e5\u8be2\u6240\u6709\u6570\u636e<\/span>\r\nList&lt;Item&gt; items = itemDao.getAllItems();\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5c06\u67e5\u8be2\u7ed3\u679c\u4f20\u9012\u7ed9 GridView \u7684\u9002\u914d\u5668\u8fdb\u884c\u663e\u793a<\/span>\r\n<span class=\"hljs-type\">GridView<\/span> <span class=\"hljs-variable\">gridView<\/span> <span class=\"hljs-operator\">=<\/span> findViewById(R.id.gridView);\r\n<span class=\"hljs-type\">GridAdapter<\/span> <span class=\"hljs-variable\">gridAdapter<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">GridAdapter<\/span>(items);\r\ngridView.setAdapter(gridAdapter);\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5176\u4ed6\u6570\u636e\u5e93\u64cd\u4f5c...<\/span>\r\n<\/code><\/pre>\n<p>In this way, you can connect to a database and display data in an Android GridView. Please note that the code above is just an example, and if your project is using a different database framework (such as SQLite), you will need to modify the code accordingly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To connect a database in Android GridView, you can follow these steps: The document named build.gradle. implementation &#8216;androidx.room:room-runtime:2.2.6&#8217; annotationProcessor &#8216;androidx.room:room-compiler:2.2.6&#8217; This is an entity. @Entity(tableName = &#8220;items&#8221;) public class Item { @PrimaryKey public int id; public String name; } @Martial Arts practitionere @Dao public interface ItemDao { @Query(&#8220;SELECT * FROM items&#8221;) List&lt;Item&gt; getAllItems(); \/\/ \u5176\u4ed6\u6570\u636e\u5e93\u64cd\u4f5c\u65b9\u6cd5&#8230; [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[453,1402,299,1404,1403],"class_list":["post-15745","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-development","tag-guide","tag-programming","tag-technology","tag-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to connect a database in Android GridView? - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn about how to connect a database in android gridview?. 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