我的手机管家（6）骚扰拦截 黑名单数据库

package com.chb.myphonesave.dao;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;


public class BlackNumberOpenHelper extends SQLiteOpenHelper{
    public static final String dbName = "blacknumber.db";
    public BlackNumberOpenHelper(Context context) {
        super(context, dbName, null, 1);
    }
    
    @Override
    public void onCreate(SQLiteDatabase db) {
        String sql = "create table blacknumber(_id integer primary key autoincrement, " +
                "number varchar(20), mode integer)";
        db.execSQL(sql);
    }

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

}

package com.chb.myphonesave.dao;

import java.util.ArrayList;
import java.util.List;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.chb.myphonesave.entity.BlackNumberInfo;

public class BlackNumberDao {
    private BlackNumberOpenHelper  bnOpenHelper;
    private static BlackNumberDao dbDao = null;
    private BlackNumberDao(Context context) {
        bnOpenHelper = new BlackNumberOpenHelper(context);
    }
    /**
     * 获取数据库管理实例
     */
    public static BlackNumberDao getInstance(Context context) {
        if(dbDao == null){
            synchronized (BlackNumberDao.class) {
                if(dbDao == null){
                    dbDao = new BlackNumberDao(context);
                }

            }
        }
        return dbDao;
    }

    /**
     * 向黑名单数据库中添加信息
     * @param number
     * @param mode
     */
    public void add(String number, int mode){
        SQLiteDatabase db = bnOpenHelper.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put("number", number);
        values.put("mode", mode);
        db.insert(BlackNumberOpenHelper.dbName, null, values);
        db.close();//关闭数据库     
    }


    /**
     * 将制定号码移除黑名单
     * @param number
     * @return
     */
    public int delete(String number){
        SQLiteDatabase db = bnOpenHelper.getWritableDatabase();
        int flag = 0;//影响的行数
        db.delete(BlackNumberOpenHelper.dbName, " number = ? ", new String[] {number});
        db.close();
        return flag;
    }

    /**
     * 
     * @param number
     * @param mode
     * @return
     */
    public int update(String number, int mode){
        SQLiteDatabase db = bnOpenHelper.getWritableDatabase();
        int flag = 0;//影响的行数
        ContentValues values = new ContentValues();
        values.put("mode", mode);
        db.update(BlackNumberOpenHelper.dbName, values, " number = ? ", new String[] {number});
        db.close();
        return flag;
    }

    /**
     * 查询指定number的条数
     * @param number
     * @return
     */
    public int find(String number){
        SQLiteDatabase db = bnOpenHelper.getReadableDatabase();
        int flag = 0;//查询的行数
        Cursor cursor = db.query(BlackNumberOpenHelper.dbName, new String[] {"number", "mode"}, 
　　　　　　　　　　　　　　　　　　　　　　 " number = ? ", new String[]{number}, null, null, null);
        flag = cursor.getCount();
        db.close();
        return flag;
    }

    /**
     * 获取指定给number的mode
     * @param number
     * @return
     */
    public int findMode(String number){
        SQLiteDatabase db = bnOpenHelper.getReadableDatabase();
        int flag = 0;//查询的行数
        Cursor cursor = db.query(BlackNumberOpenHelper.dbName, new String[] {"number", "mode"},  " number = ? ", new String[]{number}, null, null, null);
        if(cursor.getCount() > 0){
            cursor.getInt(0);
        }
        db.close();
        return flag;
    }

    /**
     * 查询所有的黑名单信息
     * @return
     */
    public List<BlackNumberInfo> findAll(){
        SQLiteDatabase db = bnOpenHelper.getReadableDatabase();
        List<BlackNumberInfo> list = new ArrayList<BlackNumberInfo>();
        Cursor cursor = db.query(BlackNumberOpenHelper.dbName, 
                new String[] {"number", "mode"},  
                null, null, null, null, null);
        while(cursor.moveToNext()){
            String number = cursor.getString(cursor.getColumnIndex("number"));
            int mode = cursor.getInt(cursor.getColumnIndex("mode"));
            BlackNumberInfo info = new BlackNumberInfo(number, mode);
            list.add(info);
        }
        db.close();
        return list;
    }
    /**
     * 查询部分的黑名单信息
     * @return
     */
    public List<BlackNumberInfo> findPart(int startIndex){
        SQLiteDatabase db = bnOpenHelper.getReadableDatabase();
        List<BlackNumberInfo> list = new ArrayList<BlackNumberInfo>();
        Cursor cursor = db
                .rawQuery(
                "select number,mode from blacknumber order by _id desc limit ?,20",
                new String[] { startIndex + "" });// 按照id逆序排列

        while(cursor.moveToNext()){
            String number = cursor.getString(cursor.getColumnIndex("number"));
            int mode = cursor.getInt(cursor.getColumnIndex("mode"));
            BlackNumberInfo info = new BlackNumberInfo(number, mode);
            list.add(info);
        }
        db.close();
        return list;
    }

    /**
     * 获取数据总数
     */
    public int getTotalCount() {
        SQLiteDatabase db = bnOpenHelper.getWritableDatabase();
        Cursor cursor = db.rawQuery("select count(*) from blacknumber", null);
        int total = 0;
        if (cursor.moveToFirst()) {
            total = cursor.getInt(0);
        }

        cursor.close();
        db.close();

        return total;
    } 

}

package com.chb.myphonesave.entity;

/**
 * 黑名单信息实体类
 */
public  class BlackNumberInfo {
    public String number;
    public int mode;

    public BlackNumberInfo(String number, int mode) {
        this.number = number;
        this.mode = mode;
    }
}