android应用开发中常常需要记录一下数据，而在查询的时候如何实现模糊查询呢？很少有文章来做这样的介绍，所以这里简单的介绍下三种sqlite的模糊查询方式，直接上代码把：

package com.example.utils;

import java.util.ArrayList;

import android.content.ContentValues;

import android.content.Context;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteOpenHelper;

import android.util.Log;

public class DBManage extends SQLiteOpenHelper {

    static int init_version = 1;

    static String database_name = "android_sqlite_test.db";

    static String tab_name = "uer_log";

    static String tab_field01 = "_id";

    static String tab_field02 = "log_name";

    SQLiteDatabase mDatabase;

    public DBManage(Context context) {

        super(context, database_name, null, init_version);

        // TODO Auto-generated constructor stub

        mDatabase = getWritableDatabase();

    }

    @Override

    public void onCreate(SQLiteDatabase db) {

        // TODO Auto-generated method stub

        String sql = "create table " + tab_name + " ( " + tab_field01

                + " integer primary key , " + tab_field02 + " text  not null) ";

        db.execSQL(sql);

    }

    @Override

    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

        // TODO Auto-generated method stub

    }

    /**

     * 插入记录

     *

     * @param u

     * @return

     */

    public boolean insertData(String... str) {

        int request_int = 0;

        for (int i = 0; i < str.length; i++) {

            // 实例化一个ContentValues 对象 ,作用，收集数据，方便于SQLite执行增，删，改，查

            ContentValues contentValues = new ContentValues();

            contentValues.put(tab_field02, str[i]);

            mDatabase.insert(tab_name, null, contentValues);

            request_int++;

        }

        return str.length == request_int;

    }

    // 根据条件模糊查询数据库数据

    public ArrayList<String> query(int top_int, String... str) {

        ArrayList<String> result_list = new ArrayList<String>();

        mDatabase = getReadableDatabase();

        //模糊查询的三种方式：

/*

 * 全部查询

        String current_sql_sel = "SELECT  * FROM " + tab_name;

        Cursor c = mDatabase.rawQuery(current_sql_sel, null);*/

        //1.使用这种query方法%号前不能加' ;

        Cursor c_test = mDatabase.query(tab_name, new String[]{tab_field02}, tab_field02+"  LIKE ? ",

                new String[] { "%" + str[0] + "%" }, null, null, null);

        //2.使用这种query方法%号前必须加'  ;

    //  Cursor  c_test=mDatabase.query(tab_name, new String[]{tab_field02},tab_field02+"  like '%" + str[0] + "%'", null, null, null, null);

        //3.使用这种方式必须在%号前加'  ;

        String current_sql_sel = "SELECT  * FROM "+tab_name +" where "+tab_field02+" like '%"+str[0]+"%'";

        //Cursor c_test = mDatabase.rawQuery(current_sql_sel, null);

         Log.e("tag", "查询完成...");

        while (c_test.moveToNext()) {

            String name = c_test.getString(c_test.getColumnIndex(tab_field02));

            //name.contains(str[0]);

            // 让集合中的数据不重复;

            if (!result_list.contains(name)) {

                result_list.add(name);

                 Log.e("tag", name);

            }

        }

        c_test.close();

        return result_list;

    }

}

转载请注明出处：
http://blog.csdn.net/fth826595345/article/details/9199235