单机android sqlite数据库的实现，这个数据库可与程序一起生成在安装包中
一、下载sqlite3.exe文件
二、运行 cmd 转到sqlite3.exe 所在目录 运行 sqlite3.exe 数据库名.db
然后会出现sqlite>的命令提示符
输入创建表的语句， create table 表名（‘列’，‘列’。。。）；（注意： 要在结束部分加 分号 ）
此时会在sqlite3.exe 所在目录，出现所建数据库的文件
三、如果想在Android中运行的话，需要在数据库中增添
CREATE TABLE "android_metadata" ("locale" TEXT DEFAULT 'zh_CN')
INSERT INTO "android_metadata" VALUES ('zh_CN')
四、将数据库 复制到 Android项目中res/raw中
五、下面是代码：
| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123 | public class TestSqlDatabase{ private static final String DATABASE_PATH = “/data/data/your.package.name/databases”; //此处不要改动，这个为数据库在手机上的物理地址 private static final int DATABASE_VERSION = 0; private static final String DATABASE_NAME = “test.db”; //此处为数据库名称 private static String outFileName = DATABASE_PATH + “/” + DATABASE_NAME; private Context context; private SQLiteDatabase database; public TestSqlDatabase(Context context) { this.context = context; File file = new File(outFileName); if (file.exists()) { database = SQLiteDatabase.openOrCreateDatabase(outFileName, null); if (database.getVersion() != DATABASE_VERSION) { database.close(); file.delete(); } } try { buildDatabase(); } catch (Exception e) { e.printStackTrace(); } } private void buildDatabase() throws Exception{ InputStream myInput = context.getResources().openRawResource(R.raw.test); File file = new File(outFileName); File dir = new File(DATABASE_PATH); if (!dir.exists()) { if (!dir.mkdir()) { throw new Exception(“创建失败”); } } if (!file.exists()) { try { OutputStream myOutput = new FileOutputStream(outFileName); byte[] buffer = new byte[1024]; int length; while ((length = myInput.read(buffer))>0){ myOutput.write(buffer, 0, length); } myOutput.close(); myInput.close(); } catch (Exception e) { e.printStackTrace(); } } } /** * 查找 * @return */public Cursor select() { database = SQLiteDatabase.openOrCreateDatabase(outFileName, null); String sql = “select * from note_table”; Cursor cursor = database.rawQuery(sql, null); return cursor;}/** * 插入 * @param word * @param note * @return */public long insert(String word, String note) { database = SQLiteDatabase.openOrCreateDatabase(outFileName, null); ContentValues cv = new ContentValues(); cv.put(“word”, word); cv.put(“note”, note); long result = database.insert(“note_table”, null, cv); return result;} /** * 更新 * @param word * @param note * @return */ private int update(String word, String note) { //参数 word 为修改条件 note为修改内容 database = SQLiteDatabase.openOrCreateDatabase(outFileName, null); ContentValues cv = new ContentValues(); cv.put(“note”, note); int result = database.update(“note_table”, cv, “word=?”, new String[]{word}); return result; } /** * 删除 * @param word */public int deleteNote(String word) { database = SQLiteDatabase.openOrCreateDatabase(outFileName, null); int result = database.delete(“note_table”, “word=?”, new String[]{word}); return result;} public void close() { database.close();} } |
