标签：android blog class c code java
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：
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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();}} |
android 本地数据库sqlite的封装,布布扣,bubuko.com
标签：android blog class c code java
原文地址：http://www.cnblogs.com/lizhiyan-world/p/3740351.html
