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 getAll()    {        //List 接口 ArrayList 实现类        List rtn = new ArrayList();        //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 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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