DBHelper.java

package com.hanqi.test3;import android.content.Context;import android.database.sqlite.SQLiteDatabase;import android.database.sqlite.SQLiteOpenHelper;import android.util.Log;/** * Created by Administrator 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","onCreate");    }    @Override    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {    }}

BlackNumber.java

package com.hanqi.test3;/** * Created by Administrator on 2016/4/15. */public class BlackNumber {    private long id;    private String phoneNumber;    public BlackNumber(long id, String phoneNumber) {        this.id = id;        this.phoneNumber = phoneNumber;    }    public BlackNumber() {    }    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;    }    public BlackNumber(String phoneNumber) {        this.phoneNumber = phoneNumber;    }    @Override    public String toString() {        return "BlackNumber{" +                "id=" + id +                ", phoneNumber='" + phoneNumber + '\'' +                '}';    }}

TestActivity1.java

package com.hanqi.test3;import android.app.AlertDialog;import android.content.DialogInterface;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.text.InputType;import android.view.View;import android.view.ViewGroup;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 TestActivity1 extends AppCompatActivity {    private ListView lv_1;    private List
     
       data;    private BlackListAdapter dla;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_test1);        lv_1 = (ListView)findViewById(R.id.lv_1);        //获取数据集合        BlackNumberDAO bd = new BlackNumberDAO(this);        data = bd.getAll();        dla = new BlackListAdapter();        //设置适配器        lv_1.setAdapter(dla);    }    //实现列表的适配器    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) {            return data.get(position).getId();        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            //position:要显示的那条记录            //判断可复用的视图是否为空            if (convertView == null)            {                //获取视图                convertView = View.inflate(TestActivity1.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 bt1_OnClick(View v)    {        final EditText editText = new EditText(this);        editText.setHint("请输入电话号码");        editText.setInputType(InputType.TYPE_CLASS_PHONE);        //editText.setLayoutParams(new DrawerLayout.LayoutParams());        //editText.setInputType();        //构造自定义对话框        new AlertDialog.Builder(this)                .setTitle("添加黑名单")                .setView(editText)                .setPositiveButton("添加", new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                        //构造实体类                        BlackNumber blacknumber = new BlackNumber(editText.getText().toString());                        //调用数据库操作类DAO，保存数据                        BlackNumberDAO blackNumberDAO = new BlackNumberDAO(TestActivity1.this);                        blackNumberDAO.insert(blacknumber);                        data.add(blacknumber);                        //通知刷新                        dla.notifyDataSetChanged();                        Toast.makeText(TestActivity1.this, "数据保存成功", Toast.LENGTH_SHORT).show();                    }                })                .setNeutralButton("取消",null)                .show();    }}
     

BlackNumberDAO.java

package com.hanqi.test3;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 Administrator on 2016/4/15. */public class BlackNumberDAO {    //定义成成员变量    private DBHelper dbHelper;    public BlackNumberDAO(Context context)    {        //初始化工具类        dbHelper = new DBHelper(context);    }    //增    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  contentValues：集合存了键值对        sd.insert("black_number",null,contentValues);        //关闭数据库        sd.close();        Log.e("TAG","添加数据成功");    }    //删    public void delete(long id)    {    }    //改    public void update(BlackNumber blackNumber)    {    }    //查    //用List（List里面装的是实体类的实例）返回数据    public List
     
       getAll()    {       List
      
        rtn = new ArrayList
       
        ();       // ArrayList:实现类  List：接口        //获取数据库连接        SQLiteDatabase sd = dbHelper.getWritableDatabase();        //查询返回游标        Cursor cursor = sd.query("black_number", null, null, null, null, null, null);        //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","数据数量"+cursor.getCount());        sd.close();        return rtn;    }}
       
      
     

activity_test1.xml

效果图：