{"id":58421,"date":"2024-10-12T20:32:18","date_gmt":"2024-10-12T12:32:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/58421\/"},"modified":"2024-10-12T20:32:18","modified_gmt":"2024-10-12T12:32:18","slug":"android%e5%a6%82%e4%bd%95%e5%be%9e%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e8%ae%80%e5%8f%96%e5%9c%96%e7%89%87%e8%b7%af%e5%be%91-android%e5%be%9e%e6%95%b8%e6%93%9a%e5%ba%ab%e8%ae%80%e5%8f%96%e5%9c%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/58421\/","title":{"rendered":"Android\u5982\u4f55\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u5716\u7247\u8def\u5f91 (android\u5f9e\u6578\u64da\u5eab\u8b80\u53d6\u5716\u7247\u8def\u5f91)"},"content":{"rendered":"

Android\u5982\u4f55\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u5716\u7247\u8def\u5f91<\/h1>\n

\u5728Android\u958b\u767c\u4e2d\uff0c\u7d93\u5e38\u9700\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u5716\u7247\u8def\u5f91\uff0c\u4ee5\u4fbf\u5728\u61c9\u7528\u7a0b\u5e8f\u4e2d\u986f\u793a\u5716\u7247\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u4ecb\u7d39\u5982\u4f55\u5728Android\u4e2d\u5be6\u73fe\u9019\u4e00\u529f\u80fd\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n

\u6578\u64da\u5eab\u7684\u8a2d\u7f6e<\/h2>\n

\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u8a2d\u7f6e\u4e00\u500b\u6578\u64da\u5eab\u4f86\u5b58\u5132\u5716\u7247\u8def\u5f91\u3002\u901a\u5e38\uff0cSQLite\u662fAndroid\u4e2d\u6700\u5e38\u7528\u7684\u6578\u64da\u5eab\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u6578\u64da\u5eab\u548c\u8868\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n

public class DatabaseHelper extends SQLiteOpenHelper {\n    private static final String DATABASE_NAME = \"images.db\";\n    private static final int DATABASE_VERSION = 1;\n    public static final String TABLE_IMAGES = \"images\";\n    public static final String COLUMN_ID = \"id\";\n    public static final String COLUMN_PATH = \"path\";\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_IMAGES_TABLE = \"CREATE TABLE \" + TABLE_IMAGES + \"(\"\n                + COLUMN_ID + \" INTEGER PRIMARY KEY AUTOINCREMENT,\"\n                + COLUMN_PATH + \" TEXT\" + \")\";\n        db.execSQL(CREATE_IMAGES_TABLE);\n    }\n\n    @Override\n    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {\n        db.execSQL(\"DROP TABLE IF EXISTS \" + TABLE_IMAGES);\n        onCreate(db);\n    }\n}\n<\/code><\/pre>\n
\u63d2\u5165\u5716\u7247\u8def\u5f91<\/h2>\n
\u5728\u8b80\u53d6\u5716\u7247\u8def\u5f91\u4e4b\u524d\uff0c\u6211\u5011\u9700\u8981\u5148\u5c07\u5716\u7247\u8def\u5f91\u63d2\u5165\u5230\u6578\u64da\u5eab\u4e2d\u3002\u4ee5\u4e0b\u662f\u63d2\u5165\u6578\u64da\u7684\u4ee3\u78bc\u793a\u4f8b\uff1a<\/p>\n
public void addImagePath(String path) {\n    SQLiteDatabase db = this.getWritableDatabase();\n    ContentValues values = new ContentValues();\n    values.put(COLUMN_PATH, path);\n    db.insert(TABLE_IMAGES, null, values);\n    db.close();\n}\n<\/code><\/pre>\n
\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u5716\u7247\u8def\u5f91<\/h2>\n
\u73fe\u5728\uff0c\u6211\u5011\u53ef\u4ee5\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u5716\u7247\u8def\u5f91\u4e86\u3002\u4ee5\u4e0b\u662f\u8b80\u53d6\u6578\u64da\u7684\u4ee3\u78bc\u793a\u4f8b\uff1a<\/p>\n
public List getAllImagePaths() {\n    List imagePaths = new ArrayList();\n    String selectQuery = \"SELECT * FROM \" + TABLE_IMAGES;\n    SQLiteDatabase db = this.getReadableDatabase();\n    Cursor cursor = db.rawQuery(selectQuery, null);\n\n    if (cursor.moveToFirst()) {\n        do {\n            String path = cursor.getString(cursor.getColumnIndex(COLUMN_PATH));\n            imagePaths.add(path);\n        } while (cursor.moveToNext());\n    }\n    cursor.close();\n    db.close();\n    return imagePaths;\n}\n<\/code><\/pre>\n
\u5728ImageView\u4e2d\u986f\u793a\u5716\u7247<\/h2>\n
\u4e00\u65e6\u6211\u5011\u5f9e\u6578\u64da\u5eab\u4e2d\u7372\u53d6\u4e86\u5716\u7247\u8def\u5f91\uff0c\u5c31\u53ef\u4ee5\u5728ImageView\u4e2d\u986f\u793a\u9019\u4e9b\u5716\u7247\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5728ImageView\u4e2d\u986f\u793a\u5716\u7247\u7684\u4ee3\u78bc\u793a\u4f8b\uff1a<\/p>\n
public void displayImages() {\n    List imagePaths = getAllImagePaths();\n    for (String path : imagePaths) {\n        ImageView imageView = new ImageView(this);\n        Bitmap bitmap = BitmapFactory.decodeFile(path);\n        imageView.setImageBitmap(bitmap);\n        \/\/ \u5c07imageView\u6dfb\u52a0\u5230\u4f48\u5c40\u4e2d\n    }\n}\n<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
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\u4e86\u89e3\u5982\u4f55\u5728Android\u61c9\u7528\u4e2d\u5f9e\u6578\u64da\u5eab\u8b80\u53d6\u5716\u7247\u8def\u5f91\uff0c\u5be6\u73fe\u5716\u7247\u7684\u6709\u6548\u986f\u793a\u8207\u7ba1\u7406\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-58421","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/58421","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=58421"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/58421\/revisions"}],"predecessor-version":[{"id":58422,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/58421\/revisions\/58422"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=58421"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=58421"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=58421"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}