react-native-sqlite-storage

生成的db文件在/data/data/<包名>/databases/key_cabinet.db；

在系统自带的文件管理是无法看到的。

android SQLite数据库管理 工具类

package com.db;

import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Environment;
import android.util.Log;

import com.facebook.react.bridge.ReactContext;

import java.io.File;

/**
 * SQLite数据库管理
 */
public class SQLiteDBUtil {

    /**
     * 打开或者创建数据库
     * @param name  数据库创建的路径
     * 参数2  一般设置为null就可以了
     * 路径: /storage/emulated/0/staff.db
     *              /data/data/com.facereactnative/databases/key_cabinet.db
     */
    public static SQLiteDatabase openOrCreateDatabase(ReactContext getContext, String name){
//        File dbfile = getContext.getDatabasePath(name);
//        String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + name;
//        return SQLiteDatabase.openOrCreateDatabase(path,null);
        int openFlags = SQLiteDatabase.OPEN_READWRITE | SQLiteDatabase.CREATE_IF_NECESSARY;

        Log.e("SQLiteDatabasepath", openFlags+"");
        final String inFileName = "/data/data/com.facereactnative/databases/"+name;
        File dbFile = new File(inFileName);
        Log.e("SQLiteDatabasepath", dbFile.getAbsolutePath());
//        SQLiteDatabase mydb = SQLiteDatabase.openDatabase(dbFile.getAbsolutePath(), null, openFlags);
//        return mydb;
        return SQLiteDatabase.openOrCreateDatabase(inFileName,null);
    }

    /**
     * 执行语句
     * @param db 数据库
     * @param content 执行的语句
     *
     * （执行语句）创建表例子: "create table usertable(_id integer primary key autoincrement,sname text,snumber text)"
     */
    public static void execSQL(SQLiteDatabase db, String content){
        //执行SQL语句
        db.execSQL(content);
    }

    /**
     * 插入数据
     * @param db 数据库
     * @param table 表名
     * @param cValue 插入的数据
     *
     * （执行语句）插入数据: "insert into userinfo(id,sname,age) values('1','xiaoxin','22')"
     */
    public static void insert(SQLiteDatabase db, String table, ContentValues cValue) {
        db.insert(table, null, cValue);
    }

    /**
     * 查询表中所有数据
     * @param db 数据库
     * @param table 表名
     */
    public static String query(SQLiteDatabase  db, String table, String selction, String[] selArgs) {
        String temp = "";
        //查询获得游标
        Cursor cursor = db.query(table, null, selction + "=?", selArgs, null, null, null);
        //判断游标是否为空
        while(cursor.moveToNext()){
            temp += String.valueOf(cursor.getInt(0) + "*" + cursor.getInt(1)) + "*" + cursor.getString(2) + "*" + String.valueOf(cursor.getInt(3) + "=");
        }
        cursor.close();
        return temp;
    }

    /**
     * 删除
     * 删除大于_index=15的所有值: (db, "userinfo", "_index>?", new String[]{"15"})
     * 删除id=2和sname=xiaoxin的所有值: (db, "userinfo", "id=? and sname=?", new String[]{"2", "xiaoxin"})
     * 删除_index=temp的所有值: (db, "userinfo", "_index = ?", new String[]{temp})
     *
     * （执行语句）删除该表的所有数据: "delete from 表名"
     * （执行语句）删除_index=1的值: "delete from userinfo where _index=1"
     */
    public static void deleteData(SQLiteDatabase db, String tableName, String key, String[] values) {
        db.delete(tableName, key, values);
    }

    /**
     * 更新
     * @param contentValues 改的值
     * @param key 条件带？的key
     * @param value 条件值value
     *
     * （执行语句）更新数据: "update userinfo set sname = '华华' where _index = 18"
     */
    public static void update(SQLiteDatabase db, String tableName, ContentValues contentValues, String key, String[] value){
        db.update(tableName, contentValues, key, value);
    }

}

直接用语句查询

  SQLiteDatabase db = SQLiteDBUtil.openOrCreateDatabase(myContext,"key_cabinet.db");
        String[] selArgs = new String['1'];
        Cursor cursor = db.rawQuery("select name from sqlite_master;",null);
        String a ="";
        if (cursor.moveToFirst()) {

            do {
                int i = 0;
                a=a+cursor.getString(i++)+";";
            } while (cursor.moveToNext());


        }
        cursor.close();