Android——黑名单管理

时间：2022-09-02 06:03:05

Android——黑名单管理

DBHelper.java

package com.example.chenshuai.test;

import android.content.Context;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteOpenHelper;

import android.util.Log;

/**

 * Created by chenshuai on 2016/4/15.

 */

public class DBHelper extends SQLiteOpenHelper {

    public DBHelper(Context context) {

        super(context, "blacklist.db", null, 1);

    }

    @Override

    public void onCreate(SQLiteDatabase db) {

        db.execSQL("create table black_number (_id integer primary key autoincrement,phone_number varchar)");

        Log.e("TAG","建表完成" );

    }

    @Override

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

    }

}

BlackNumber.java

package com.example.chenshuai.test;

/**

 * Created by chenshuai on 2016/4/15.

 */

//实体类 只负责装载数据

public class BlackNumber {

    private long id;

    private String phoneNumber;

    //生成get和set方法

    public long getId() {

        return id;

    }

    public void setId(long id) {

        this.id = id;

    }

    public String getPhoneNumber() {

        return phoneNumber;

    }

    public void setPhoneNumber(String phoneNumber) {

        this.phoneNumber = phoneNumber;

    }

    //构造方法

    public BlackNumber() {

    }

    public BlackNumber(long id, String phoneNumber) {

        this.id = id;

        this.phoneNumber = phoneNumber;

    }

    public BlackNumber(String phoneNumber) {

        this.phoneNumber = phoneNumber;

    }

    @Override

    public String toString() {

        return "BlackNumber{" +

                "id=" + id +

                ", phoneNumber='" + phoneNumber + '\'' +

                '}';

    }

}

BlackNumberDAO.java

package com.example.chenshuai.test;

import android.content.ContentValues;

import android.content.Context;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.util.Log;

import java.util.ArrayList;

import java.util.List;

/**

 * Created by chenshuai on 2016/4/15.

 */

//数据操作类

public class BlackNumberDAO {

    private DBHelper dbHelper;

    //构造方法 初始化

    public BlackNumberDAO(Context context){

        //初始化工具类

        dbHelper = new DBHelper(context);

    }

    //增  直接将实体类传进来

    public void insert(BlackNumber blackNumber)

    {

        //获取数据库连接

        SQLiteDatabase sd = dbHelper.getWritableDatabase();

        //要添加数据的键值对集合

        ContentValues contentValues = new ContentValues();

        contentValues.put("phone_number", blackNumber.getPhoneNumber());

        //数据添加

        sd.insert("black_number", null, contentValues);

        //关闭数据库

        sd.close();

        Log.e("TAG", "添加数据成功");

    }

    //查询

    //用List<实体类的实例>返回数据

    public List<BlackNumber> getAll()

    {

        //List 接口 ArrayList 实现类

        List<BlackNumber> rtn = new ArrayList<BlackNumber>();

        //查询数据

        //获取数据库连接

        SQLiteDatabase sd = dbHelper.getWritableDatabase();

        //返回游标

        Cursor cursor = sd.query("black_number", null, null, null, null, null, "_id desc");

        //遍历 移动游标，获取数据

        while(cursor.moveToNext())

        {

            //构造实体类的实例,放入List

            rtn.add(new BlackNumber(cursor.getLong(0),cursor.getString(1)));

        }

        Log.e("TAG", "数据的记录条数" + cursor.getCount());

        sd.close();

        return rtn;

    }

    //修改

    public void update(BlackNumber blackNumber)

    {

        //获取数据库连接

        SQLiteDatabase sd = dbHelper.getWritableDatabase();

        //要添加数据的键值对集合

        ContentValues contentValues = new ContentValues();

        contentValues.put("phone_number", blackNumber.getPhoneNumber());

        //数据修改

        sd.update("black_number",contentValues,"_id=?",new String[]{String.valueOf(blackNumber.getId())});

        //sd.update("black_number",contentValues,"_id=?",new String[]{blackNumber.getId().toString()});

        //关闭数据库

        sd.close();

        Log.e("TAG", "添加数据成功");

    }

    //删 传主键

    public void delete(long id)

    {

        //获取数据库连接

        SQLiteDatabase sd = dbHelper.getWritableDatabase();

        //数据删除

        sd.delete("black_number","_id=?",new String[]{String.valueOf(id)});

        //关闭数据库

        sd.close();

        Log.e("TAG", "删除数据成功");

    }

}
activity_activityhhh1.xml
<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context="com.example.chenshuai.test.Activityhhh1"

    android:orientation="vertical">

    <ListView

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1"

        android:id="@android:id/list">

    </ListView>

    <TextView

        android:id="@android:id/empty"

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1"

        android:text="还没有一个黑名单"

        android:textSize="30dp"

        android:gravity="center"/>

    <Button

        android:layout_width="match_parent"

        android:layout_height="50dp"

        android:text="添加"

        android:onClick="bt_tianjiasjonclick"/>

</LinearLayout>

Activityhhh1.java

package com.example.chenshuai.test;

import android.app.AlertDialog;

import android.app.ListActivity;

import android.content.DialogInterface;

import android.os.Bundle;

import android.text.InputType;

import android.view.ContextMenu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.BaseAdapter;

import android.widget.EditText;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

import java.util.List;

public class Activityhhh1 extends ListActivity {

    private ListView lv_1;

    private List<BlackNumber> data;

    private BlackListAdapter bla;

    private int position;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_activityhhh1);

        //lv_1 = (ListView)findViewById(R.id.lv_1);

        lv_1 = getListView();

        //获取数据集合

        BlackNumberDAO bn = new BlackNumberDAO(this);

        data = bn.getAll();

        //设置适配器

        bla = new BlackListAdapter();

        lv_1.setAdapter(bla);

        //设置上下文菜单

        lv_1.setOnCreateContextMenuListener(this);

    }

    //创建上下文菜单

    @Override

    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {

        super.onCreateContextMenu(menu, v, menuInfo);

        //添加两个item

        menu.add(0,0,0,"修改");

        menu.add(0,1,1,"删除");

        //获取长按的适配器信息

        AdapterView.AdapterContextMenuInfo mninfo = (AdapterView.AdapterContextMenuInfo)menuInfo;

        position = mninfo.position;

    }

    //加选项监听

    @Override

    public boolean onContextItemSelected(MenuItem item) {

        final BlackNumber bt = data.get(position);

        switch (item.getItemId())

        {

            //修改

            case 0:

                //弹出对话框

                //定义文本框

                final EditText et = new EditText(this);

                et.setInputType(InputType.TYPE_CLASS_PHONE);

                et.setText(bt.getPhoneNumber());

                new AlertDialog.Builder(this)

                        .setTitle("修改黑名单")

                        .setView(et)

                        .setNeutralButton("取消",null)

                        .setPositiveButton("修改", new DialogInterface.OnClickListener() {

                            @Override

                            public void onClick(DialogInterface dialog, int which) {

                                //获取修改后的值

                                bt.setPhoneNumber(et.getText().toString());

                                //执行修改数据库操作

                                BlackNumberDAO bnd = new BlackNumberDAO(Activityhhh1.this);

                                bnd.update(bt);

                                //更新集合

                                //BlackNumber bt = data.get(position)

                                //bt和data里面的对象同时指向的是同一个内存地址

                                //如果bt被修改了，data里面的对象也同时发生变化

                                //这就是引用类型的特点

                                //通知刷新列表

                                bla.notifyDataSetChanged();

                                Toast.makeText(Activityhhh1.this, "修改成功!", Toast.LENGTH_SHORT).show();

                            }

                        })

                        .show();

                break;

            //删除

            case 1:

                new AlertDialog.Builder(this)

                        .setMessage("确定要删除吗？")

                        .setNeutralButton("取消",null)

                        .setPositiveButton("确定", new DialogInterface.OnClickListener() {

                            @Override

                            public void onClick(DialogInterface dialog, int which) {

                                BlackNumberDAO bd = new BlackNumberDAO(Activityhhh1.this);

                                //在数据库删除 需要id

                                bd.delete(bt.getId());

                                //刷新界面

                                //移除集合中的记录

                                data.remove(position);

                                //通知刷新

                                bla.notifyDataSetChanged();

                                Toast.makeText(Activityhhh1.this, "删除成功", Toast.LENGTH_SHORT).show();

                            }

                        })

                        .show();

                break;

        }

        return super.onContextItemSelected(item);

    }

    //列表适配器

    class BlackListAdapter extends BaseAdapter

    {

        @Override

        public int getCount() {

            return data.size();

        }

        @Override

        public Object getItem(int position) {

            return data.get(position);

        }

        @Override

        public long getItemId(int position) {

            //获取类的实例，获取id

            return data.get(position).getId();

        }

        @Override

        public View getView(int position, View convertView, ViewGroup parent) {

            //判断可复用的视图是否为空

            if (convertView ==null)

            {

                //获取视图

                //1.获取layout文件  用加载器

               convertView = View.inflate(Activityhhh1.this,android.R.layout.simple_list_item_1,null);

            }

            //给视图绑定数据

            TextView tv = (TextView)convertView.findViewById(android.R.id.text1);

            tv.setText(data.get(position).getPhoneNumber());

            return convertView;

        }

    }

    public void bt_tianjiasjonclick(View view)

    {

        final EditText editText = new EditText(this);

        editText.setHint("输入黑名单号码");

        //editText.setLayoutParams(new ListView.LayoutParams());

        editText.setInputType(InputType.TYPE_CLASS_PHONE);

        //构造自定义对话框

        new AlertDialog.Builder(this)

                .setTitle("添加黑名单")

                .setView(editText)

                .setNegativeButton("取消",null)

                .setPositiveButton("添加", new DialogInterface.OnClickListener() {

                    @Override

                    public void onClick(DialogInterface dialog, int which) {

                        //1.构造实体类 参数为输入的电话号码

                        BlackNumber bn = new BlackNumber(editText.getText().toString());

                        //2.用数据库操作类 DAO 保存数据

                        BlackNumberDAO blackNumberDAO = new BlackNumberDAO(Activityhhh1.this);

                        blackNumberDAO.insert(bn);

                        //添加数据到集合

                        //给add添加索引值从上往下加数据

                        data.add(0,bn);

                        //通知适配器刷新ListView

                        bla.notifyDataSetChanged();

                        Toast.makeText(Activityhhh1.this, "数据保存成功", Toast.LENGTH_SHORT).show();

                    }

                })

                .setCancelable(false)

                .show();

  }

}
 

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