使用NDK开发SQLite3

尝试环境：

　　Android2.2（源码） SDK

　　android-ndk-r7

尝试在NDK下面使用C语言做Android的SQLite3数据库存储功能。做了如下尝试：

在Android的源代码中找到sqlite3.h和libsqlite.so拷贝到NDK的lib（D:\android\android-ndk-r7-linux\platforms\android-3\arch-arm\usr\lib）和include（D:\android\android-ndk-r7-linux\platforms\android-3\arch-arm\usr\include）目录下。

测试代码：

 1 /* -- START -- */ 2 /* 3  *代码借用：http://www.cnblogs.com/sardine/archive/2011/07/30/2121853.html 4  */ 5 #include <sqlite3.h> 6 #include <stdio.h> 7  8 static int _sql_callback(void * notused, int argc, char ** argv, char ** szColName) 9 {10         int i;11         for ( i=0; i < argc; i++ )12         {13                 printf( "%s = %s\n", *szColName, argv == 0 ? "NUL" : *argv );14         }15         return 0;16 }17 18 19 int main()20 {21     const char * sSQL1 = "create table users(userid varchar(20) PRIMARY KEY,age int,regtime datetime);";22     const char * sSQL2 = "insert into users values('guilh',29,'2009-7-16');";23     const char * sSQL3 = "select * from users;";24 25         sqlite3 * db = 0;26         char * pErrMsg = 0;27 28         int ret = 0;29         const char* const dbname = "gtest.db";30     31         //打开数据库，如果数据库不存在，会建立一个数据库32     ret = sqlite3_open(dbname, &db);33 34     if ( ret != SQLITE_OK )35     {36         printf("open error! : %s", sqlite3_errmsg(db));37         return(1);38     }39 40     printf("open db OK!\n");41 42     // 执行建表SQL43     sqlite3_exec( db, sSQL1, 0, 0, &pErrMsg );44     if ( ret != SQLITE_OK )45     {46         //fprintf(stderr, "SQL error: %s\n", pErrMsg);47         printf("SQL error: %s\n", pErrMsg);48         sqlite3_free(pErrMsg);49     }50 51     // 执行插入记录SQL52     sqlite3_exec( db, sSQL2, 0, 0, &pErrMsg);53 54     // 查询数据表55     sqlite3_exec( db, sSQL3, _sql_callback, 0, &pErrMsg);56 57     // 关闭数据库58     sqlite3_close(db);59     db = 0;60 61     return 0;62 }

Android.mk: Android的make文件

 1 #### START #### 2 LOCAL_PATH:= $(call my-dir) 3  4 include $(CLEAR_VARS) 5 #include $(LOCAL_PATH)/../config.mk 6  7 LOCAL_SRC_FILES:= test.cpp 8  9 10 LOCAL_LDLIBS := -lcutils -licuuc -licui18n -lutils -licudata -lsqlite 11 12 13 #LOCAL_PRELINK_MODULE := false14 15 LOCAL_MODULE :=  sqlite316 17 include $(BUILD_EXECUTABLE)18 19 ### END ###

如果此时直接编译的话会有如下提示：

 1 $ make APP=sqlite3 2 Android NDK: Building for application 'sqlite3' 3 Executable     : sqlite3 4 D:/android/android-ndk-r7-linux/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.4.3/http://www.cnblogs.com/http://www.cnblogs.com/arm-linux-androideabi/bin/ld.exe: warning: libicuuc.so, needed by ./platforms/android-3/arch-arm/usr/lib/libsqlite.so, not found (try using -rpath or -rpath-link) 5 D:/android/android-ndk-r7-linux/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.4.3/http://www.cnblogs.com/http://www.cnblogs.com/arm-linux-androideabi/bin/ld.exe: warning: libicui18n.so, needed by ./platforms/android-3/arch-arm/usr/lib/libsqlite.so, not found (try using -rpath or -rpath-link) 6 D:/android/android-ndk-r7-linux/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.4.3/http://www.cnblogs.com/http://www.cnblogs.com/arm-linux-androideabi/bin/ld.exe: warning: libutils.so, needed by ./platforms/android-3/arch-arm/usr/lib/libsqlite.so, not found (try using -rpath or -rpath-link) 7 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `ucol_getShortDefinitionString_4_2' 8 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `ucol_close_4_2' 9 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `utf32_to_utf8'10 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `ucol_open_4_2'11 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `unorm_next_4_2'12 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `u_isalpha_4_2'13 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `ucol_strcollIter_4_2'14 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `ucol_getSortKey_4_2'15 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `utf8_length_from_utf32'16 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `utf8_appendCharSafeBody_4_2'17 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `ucol_strcoll_4_2'18 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `utf8_length'19 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `uiter_setUTF8_4_2'20 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `u_toupper_4_2'21 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `u_strtok_r_4_2'22 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `utf32_at'23 ./platforms/android-3/arch-arm/usr/lib/libsqlite.so: undefined reference to `ucol_setAttribute_4_2'24 collect2: ld returned 1 exit status25 build/core/build-binary.mk:324: recipe for target `out/apps/sqlite3/armeabi/sqlite3' failed26 make: *** [out/apps/sqlite3/armeabi/sqlite3] Error 1

按照上面提示，依次从目标环境（源码或是你手机中）拷贝libcutils.so libicuuc.so libicui18n.so libutils.so libicudata.so到NDK的lib目录（见上）下。

如果出现如下错误：

 1 $ make APP=sqlite3 2 Android NDK: Building for application 'sqlite3' 3 Executable     : sqlite3 4 ./platforms/android-3/arch-arm/usr/lib/libcutils.so: undefined reference to `ioprio_set' 5 ./platforms/android-3/arch-arm/usr/lib/libicuuc.so: undefined reference to `mbstowcs' 6 ./platforms/android-3/arch-arm/usr/lib/libcutils.so: undefined reference to `ioprio_get' 7 ./platforms/android-3/arch-arm/usr/lib/libicuuc.so: undefined reference to `wcstombs' 8 collect2: ld returned 1 exit status 9 build/core/build-binary.mk:324: recipe for target `out/apps/sqlite3/armeabi/sqlite3' failed10 make: *** [out/apps/sqlite3/armeabi/sqlite3] Error 1

拷贝目标环境的libc.so替换掉你开发环境里面的。

执行结果如下：

1 # ./sqlite32 ./sqlite33 open db OK!4 userid = guilh5 userid = guilh6 userid = guilh

生成的数据库如下：

整个测试项目源代码：SQLite3.rar

数据库里面的regtime不对，是应该sql语句里面的时间不对。改下就ok：

1     const char * sSQL2 = "insert into users values('guilh',29,'2012-12-30 00:00:00');";

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