标签：SQLite String 安卓 Dao public cursor user new id

安卓Dao三层架构SQLite数据操作

MainActivity类代码如下

public class MainActivity extends AppCompatActivity {

    private EditText userName;
    private EditText pwd;
    private Context context;
    private UserInfoManager userInfoManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        userName = (EditText) findViewById(R.id.userName);
        pwd = (EditText) findViewById(R.id.pwd);
      
        context=this;
        userInfoManager = UserInfoManager.getInstance(context);

    }
    //注册单击事件
    public void registBntOnclick(View view) {
        showDialog();
    }
    //登录点击事件
    public void loginBntOnclick(View view) {
        User us =new User( userName.getText().toString(),pwd.getText().toString());
        Log.i("ddd",pwd.getText().toString());
        User user =userInfoManager.login(us);
        if (user!=null){
            Toast.makeText(this,"登录成功",Toast.LENGTH_SHORT).show();
            Intent intent =new Intent(this,SecondActivity.class);
            intent.putExtra("user",user);
            startActivity(intent);
        }else {
            userName.setText(us.getUserName());
            Toast.makeText(this,"登录失败",Toast.LENGTH_SHORT).show();
        }

    }

    //初始化并弹出对话框方法
    private void showDialog() {
        View view = LayoutInflater.from(this).inflate(R.layout.regist_dialog_layout, null, false);
        final AlertDialog dialog = new AlertDialog.Builder(this).setView(view).create();
        //数据处理
        final EditText RUserName = (EditText) view.findViewById(R.id.R_userName);//用户名
        final EditText RPhone  = (EditText) view.findViewById(R.id.R_phone);//电话号码
        final EditText RPwd = (EditText) view.findViewById(R.id.R_pwd);//密码
        Button okBnt = (Button) view.findViewById(R.id.ok_bnt);//确定按钮
        Button noBnt = (Button) view.findViewById(R.id.no_bnt);//取消按钮

        //确定按钮单击事件
        okBnt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final User us =new User();
                us.setUserName(RUserName.getText().toString());
                us.setPhone(RPhone.getText().toString());
                us.setSex("女");
                us.setPwd(RPwd.getText().toString());
                int count =userInfoManager.add(us);
                if (count>0){
                    /* @setIcon 设置对话框图标
                     * @setTitle 设置对话框标题
                     * @setMessage 设置对话框消息提示
                     */
                    final AlertDialog.Builder normalDialog = new AlertDialog.Builder(MainActivity.this);
                    normalDialog.setTitle("提示");
                    normalDialog.setMessage("注册成功跳转登录界面吗?");
                    normalDialog.setPositiveButton("确定",
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog1, int which) {
                                    //...To-do
                                    dialog1.dismiss();
                                    dialog.dismiss();
                                   userName.setText(us.getUserName());
                                   pwd.setText(us.getPwd());
                                }
                            });
                    normalDialog.show();

                }else {
                    final AlertDialog.Builder normalDialog = new AlertDialog.Builder(MainActivity.this);
                    normalDialog.setTitle("提示");
                    normalDialog.setMessage("注册失败！");
                    normalDialog.setPositiveButton("确定",
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog1, int which) {
                                    //...To-do
                                    dialog1.dismiss();
                                }
                            });
                    normalDialog.show();
                }

            }
        });
        //取消按钮单击事件
        noBnt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
        dialog.show();
        //此处设置位置窗体大小，我这里设置为了手机屏幕宽度的3/4  注意一定要在show方法调用后再写设置窗口大小的代码，否则不起效果会
        dialog.getWindow().setLayout((ScreenUtils.getScreenWidth(this) / 4 * 4), LinearLayout.LayoutParams.WRAP_CONTENT);
    }
}

SecondActivity类代码如下

public class SecondActivity extends AppCompatActivity {
    private TextView txUserName;//用户名
    private TextView txNumber;//电话
    private TextView txInterest;//爱好
    private TextView sex;//性别
    private TextView myself;//个人简介
    private Button selAll;//查询所有
    private Button upPwd;//修改密码
    private User user;//用户对象
    private Context context;//上下文
    private UserInfoManager userInfoManager;
    private ListView lv;//ListView视图
    private List<User> dataList = new ArrayList<User>();//存储数据
    private ListItemAdapter listViewAdapter;//ListView的数据适配器


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        context = this;
        userInfoManager = UserInfoManager.getInstance(context);
        //初始化控键
        intin();

    }

    //初始化控键
    private void intin() {
        txUserName = (TextView) findViewById(R.id.tx_userName);
        txNumber = (TextView) findViewById(R.id.tx_number);
        txInterest = (TextView) findViewById(R.id.tx_interest);
        sex = (TextView) findViewById(R.id.sex);
        myself = (TextView) findViewById(R.id.myself);
        selAll = (Button) findViewById(R.id.sel_all);
        upPwd = (Button) findViewById(R.id.up_pwd);
        lv = (ListView) findViewById(R.id.lv);
        Intent intent = getIntent();
        user = (User) getIntent().getSerializableExtra("user");
        txUserName.setText("用 户 名："+user.getUserName());
        txNumber.setText("电话号码："+user.getPhone());
        Log.i("activity_second", user.getUserName());

    }

    //修改密码
    public void upPwdOnclick(View view) {
        showDialog();
    }


    //查询所有用户
    public void selAllOnclick(View view) {
        //初始化5项数据
        dataList = userInfoManager.findAll();
        //设置ListView的适配器
        listViewAdapter = new ListItemAdapter(this, dataList);
        lv.setAdapter(listViewAdapter);
        lv.setSelection(4);

    }

    //初始化并弹出对话框方法
    private void showDialog() {
        View view = LayoutInflater.from(this).inflate(R.layout.update_pwd_dialog_layout, null, false);
        final AlertDialog dialog = new AlertDialog.Builder(this).setView(view).create();
        //数据处理
        final EditText UpUserName = (EditText) view.findViewById(R.id.Up_userName);
        final EditText oldPwd = (EditText) view.findViewById(R.id.old_pwd);
        final EditText newPwd = (EditText) view.findViewById(R.id.new_pwd);
        Button upOkBnt = (Button) view.findViewById(R.id.up_ok_bnt);
        Button upNoBnt = (Button) view.findViewById(R.id.up_no_bnt);
        //确定按钮单击事件
        upOkBnt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                User us = new User(UpUserName.getText().toString(), oldPwd.getText().toString());
                int count = userInfoManager.updatePwd(us, newPwd.getText().toString());

                if (count > 0) {
                    Toast.makeText(SecondActivity.this, "修改成功", Toast.LENGTH_SHORT).show();

                } else {
                    Toast.makeText(SecondActivity.this, "修改失败", Toast.LENGTH_SHORT).show();
                }
                dialog.dismiss();
            }
        });

        //取消按钮单击事件
        upNoBnt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
        dialog.show();
        //此处设置位置窗体大小，我这里设置为了手机屏幕宽度的3/4  注意一定要在show方法调用后再写设置窗口大小的代码，否则不起效果会
        dialog.getWindow().setLayout((ScreenUtils.getScreenWidth(this) / 4 * 4), LinearLayout.LayoutParams.WRAP_CONTENT);

    }

    public class ListItemAdapter extends BaseAdapter {

        private Context context;//上下文对象
        private List<User> dataList;//ListView显示的数据

        /**
         * 构造器
         *
         * @param context  上下文对象
         * @param dataList 数据
         */
        public ListItemAdapter(Context context, List<User> dataList) {
            this.context = context;
            this.dataList = dataList;
        }

        @Override
        public int getCount() {
            return dataList == null ? 0 : dataList.size();
        }

        @Override
        public Object getItem(int position) {
            return dataList.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            ViewHolder viewHolder;
            //判断是否有缓存
            if (convertView == null) {
                convertView = LayoutInflater.from(context).inflate(R.layout.all_item_layout, null);
                viewHolder = new ViewHolder(convertView);
                convertView.setTag(viewHolder);

            } else {
                //得到缓存的布局
                viewHolder = (ViewHolder) convertView.getTag();
            }
            //设置内容
            viewHolder.txName.setText(dataList.get(position).getUserName());
            viewHolder.delBnt.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View arg0) {
                    // TODO Auto-generated method stub
                    //从集合中删除所删除项的EditText的内容
                    int count = userInfoManager.remove(dataList.get(position).getId());
                    if (count > 0) {
                        dataList.remove(position);
                        listViewAdapter.notifyDataSetChanged();
                        Toast.makeText(SecondActivity.this, "删除成功", Toast.LENGTH_SHORT).show();
                    } else {
                        Toast.makeText(SecondActivity.this, "删除失败", Toast.LENGTH_SHORT).show();
                    }

                }
            });
            return convertView;
        }

        /**
         * ViewHolder类
         */
        class ViewHolder {
            TextView txName;
            Button delBnt;

            /**
             * 构造器
             *
             * @param view 视图组件（ListView的子项视图）
             */
            ViewHolder(View view) {
                txName = (TextView) view.findViewById(R.id.tx_name);
                delBnt = (Button) view.findViewById(R.id.del_bnt);
            }
        }

    }

activity_main.xml 代码块

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/cz_bj"
    android:padding="15dp"
    tools:context=".avtivity.MainActivity">

    <LinearLayout
        android:id="@+id/layout_et"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="265dp"
        android:orientation="vertical"
        android:padding="15dp">

        <EditText
            android:id="@+id/userName"
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:layout_marginTop="15dp"
            android:background="@drawable/cz_shade_ll"
            android:hint="用户名"
            android:paddingLeft="10dp"
            android:textSize="20dp" />

        <EditText
            android:id="@+id/pwd"
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:layout_marginTop="15dp"
            android:background="@drawable/cz_shade_ll"
            android:hint="密  码"
            android:inputType="textPassword"
            android:paddingLeft="10dp"
            android:textSize="20dp" />

    </LinearLayout>

    <LinearLayout
        android:id="@+id/layout_bnt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/layout_et"
        android:orientation="horizontal"
        android:padding="25dp">

        <Button
            android:id="@+id/login_bnt"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:background="@drawable/cz_shade_button"
            android:text="登录"
            android:onClick="loginBntOnclick"
            android:textColor="#fff"
            android:textSize="20dp" />

        <Button
            android:id="@+id/regist_bnt"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:background="@drawable/cz_shade_button"
            android:onClick="registBntOnclick"
            android:text="注册"
            android:textColor="#fff"
            android:textSize="20dp" />
    </LinearLayout>


</RelativeLayout>

activity_second.xml 布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".avtivity.SecondActivity">

    <LinearLayout
        android:id="@+id/layout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:orientation="horizontal">

        <ImageView
            android:layout_width="70dp"
            android:layout_height="70dp"
            android:layout_marginLeft="30dp"
            android:background="@drawable/cz_head" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dp"
            android:orientation="vertical">


            <TextView
                android:id="@+id/tx_userName"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="昵   称："
                android:textColor="#000000"
                android:textSize="20sp"
                android:layout_marginBottom="5dp"/>

            <TextView
                android:id="@+id/tx_number"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="电话号码："
                android:textColor="#000000"
                android:textSize="20sp" />

        </LinearLayout>
    </LinearLayout>
    <LinearLayout
        android:id="@+id/layout2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/layout1"
        android:layout_marginTop="20dp"
        android:orientation="vertical">
        <TextView
            android:id="@+id/tx_interest"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="@string/interest"
            style="@style/text_Style"
            />
        <TextView
            android:id="@+id/sex"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="性别：女"
            style="@style/text_Style"
            />
        <TextView
            android:id="@+id/myself"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="@string/myself"
            style="@style/text_Style"
            />

        <ListView
            android:id="@+id/lv"
            android:layout_width="match_parent"
            android:layout_height="250dp"></ListView>
    </LinearLayout>
   <LinearLayout
       android:id="@+id/layout3"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:layout_below="@id/layout2"
       android:orientation="vertical">

   </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:padding="20dp"
        android:layout_below="@id/layout3"
        >
        <Button
            android:id="@+id/sel_all"
            android:layout_width="170dp"
            android:layout_height="wrap_content"
            android:text="所有用户"
            android:onClick="selAllOnclick"
            android:textColor="#000"
            android:textSize="18sp"
            />
        <Button
            android:id="@+id/up_pwd"
            android:layout_width="170dp"
            android:layout_height="wrap_content"
            android:text="修改密码"
            android:onClick="upPwdOnclick"
            android:layout_marginLeft="20dp"
            android:textColor="#000"
            android:textSize="18sp"
            />
    </LinearLayout>
</RelativeLayout>

ListView标签item 布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:padding="10dp"
   >

       <TextView
           android:id="@+id/tx_name"
           android:layout_width="360dp"
           android:layout_height="wrap_content"
           android:text="张山"
           android:textSize="20dp"
           android:textColor="#000"
           />
       <Button
           android:id="@+id/del_bnt"
           android:layout_width="30dp"
           android:layout_height="30dp"
           android:background="@drawable/del"/>



</LinearLayout>

dialog弹窗XML布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="20dp">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="注册信息"
        android:layout_gravity="center"
        android:textColor="#000"
        android:textSize="30dp"
        />
    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#303F9F"/>
   <LinearLayout
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:orientation="horizontal"
       android:padding="10dp">
       <TextView
           android:layout_width="90dp"
           android:layout_height="wrap_content"
           android:text="用 户 名："
           android:textSize="18sp"
           android:textColor="#000"/>
       <EditText
           android:id="@+id/R_userName"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:textSize="18sp"
           android:height="60dp"
           android:layout_marginLeft="5dp"
           />
   </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:padding="10dp">
        <TextView
            android:layout_width="90dp"
            android:layout_height="wrap_content"
            android:text="电话号码："
            android:textSize="18sp"
            android:textColor="#000"/>
        <EditText
            android:id="@+id/R_phone"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="18sp"
            android:height="60dp"
            android:layout_marginLeft="5dp"
            />
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:padding="10dp">
        <TextView
            android:layout_width="90dp"
            android:layout_height="wrap_content"
            android:text="密       码："
            android:textSize="18sp"
            android:textColor="#000"/>

        <EditText
            android:id="@+id/R_pwd"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="textPassword"
            android:layout_marginLeft="5dp"
            android:height="60dp"
            android:textSize="18sp" />
    </LinearLayout>
    <RelativeLayout
        android:id="@+id/layout_bnt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/layout_et"
        android:layout_marginLeft="100dp"
        android:padding="5dp">

        <Button
            android:id="@+id/ok_bnt"
            android:layout_width="130dp"
            android:layout_height="wrap_content"
            android:background="@android:color/transparent"
            android:text="确定"
            android:textColor="#8EE5EE"
            android:textSize="20dp" />

        <Button
            android:id="@+id/no_bnt"
            android:layout_width="130dp"
            android:layout_height="wrap_content"
            android:layout_marginLeft="150dp"
            android:text="取消"
            android:background="@android:color/transparent"
            android:textColor="#8EE5EE"
            android:textSize="20dp" />
    </RelativeLayout>


</LinearLayout>

pojo实体类User

public class User implements Serializable {
    private int id;//编号
    private String userName;//昵称
    private String phone;//电话
    private String myself;//个人简介
    private String sex;//性别
    private String pwd;//密码
    private String interest;//兴趣

    public User() {
    }

    public User(int id, String userName, String phone, String myself, String sex, String pwd, String interest) {
        this.id = id;
        this.userName = userName;
        this.phone = phone;
        this.myself = myself;
        this.sex = sex;
        this.pwd = pwd;
        this.interest = interest;
    }

    public User(String userName, String phone, String myself, String sex, String pwd, String interest) {
        this.userName = userName;
        this.phone = phone;
        this.myself = myself;
        this.sex = sex;
        this.pwd = pwd;
        this.interest = interest;
    }

    public User(String userName, String pwd) {
        this.userName = userName;
        this.pwd = pwd;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getMyself() {
        return myself;
    }

    public void setMyself(String myself) {
        this.myself = myself;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    public String getInterest() {
        return interest;
    }

    public void setInterest(String interest) {
        this.interest = interest;
    }
}

创建数据库MySql类继承SQLiteOpenHelper

public class MySql extends SQLiteOpenHelper {
    /**
     *
     * @param context 上下文
     * @param name 数据库名
     * @param factory 可选的数据库游标工厂类，当查询(query)被提交时，该对象会被调用来实例化一个游标。默认为null
     * @param version 数据库版本号
     */

    public MySql(@Nullable Context context, @Nullable String name, @Nullable SQLiteDatabase.CursorFactory factory, int version) {
        super(context, name, factory, version);
    }

    public MySql(Context context) {
        super(context,Constant.DATABASE_NAME,null,Constant.DATABASE_VERSION);
    }


    @Override
    public void onCreate(SQLiteDatabase db) {
        //创建用户表格
        db.execSQL("create table userInfo(id integer primary key autoincrement,username varchar(20),phone varchar(20),myself varchar(100),sex varchar(10),pwd varchar(20),interest varchar(50))");
    }

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

    }
}

创建接口Dao进行数据库增删查改操作

public interface UserDao {
    public  int add(User user);
    public int remove(int id);
    public int updatePwd(User user,String newPwd);
    public User findById(int id);
    public User login(User user);
    public List<User> findByCoreBar(PageBean cp);
    public List<User> findAll();

}

使用单列模式创建UserInfoManager类实现UserDao对数据库进行操作

public class UserInfoManager implements UserDao {
    private static ContentValues values;
    private static SQLiteDatabase db;//创建SQLiteDatabase对象
    private static MySql mySql;//数据链接池
    private static UserInfoManager userInfoManager = null;
    private UserInfoManager(){};//私有构造函数，避免外界可以通过new 获取对象
    private UserInfoManager(final Context context) {
        //执行一些初始化的任务
        new Thread(){
            public void run(){
                //创建数据库对象
                if (mySql == null) {
                    mySql = new MySql(context);
                }
            }
        }.start();
    }
    public static synchronized UserInfoManager getInstance(Context context){
        if(userInfoManager == null){
            userInfoManager = new UserInfoManager(context);
        }
        return userInfoManager;
    }
    /**
     * @param user 注册
     */
    @Override
    public int add(User user) {
        Log.i("d", user.getUserName());
        try {
            //获取可读写的SQLiteDatabase对象
            db = mySql.getWritableDatabase();
            //创建ContentValues对象
            values = new ContentValues();
            //将数据添加到ContentValues对象中去
            values.put("username", user.getUserName());
            values.put("phone", user.getPhone());
            values.put("myself", user.getMyself());
            values.put("sex", user.getSex());
            values.put("pwd", user.getPwd());
            values.put("interest", user.getInterest());
            int index = (int) db.insert("userInfo", null, values);
            return index;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            db.close();
        }

        return 0;
    }

    /**
     * @param id
     */
    @Override
    public int remove(int id) {
        db=mySql.getWritableDatabase();
        int index =db.delete("userInfo","id=?",new String[]{id+""});
        db.close();
        return index;
    }

    /**
     * @param user
     * @return
     */
    @Override
    public int updatePwd(User user,String newPwd) {
        db=mySql.getWritableDatabase();
        values =new ContentValues();
        values.put("pwd",newPwd);
        int index = db.update("userInfo",values,"username=?",new String[]{user.getUserName()});
        db.close();
        return index;
    }

    /**
     * @param id
     * @return
     */
    @Override
    public User findById(int id) {
        db = mySql.getReadableDatabase();
        User user = null;
        Cursor cursor = db.query("userInfo",null,"id=?",new String[]{id+""},null,null,null);
        if(cursor.moveToNext()){
            user = new User();
            user.setId(cursor.getInt(0));
            user.setUserName(cursor.getString(1));
            user.setPhone(cursor.getString(2));
            user.setMyself(cursor.getString(3));
            user.setSex(cursor.getString(4));
            user.setPwd(cursor.getString(5));
            user.setInterest(cursor.getString(6));

        }
        db.close();
        return user;

    }

    /**
     * @param user 登录
     * @return
     */
    @Override
    public User login(User user) {
        db = mySql.getReadableDatabase();
        Log.i("ddd",user.getPwd());
        User us = null;
        Cursor cursor = db.rawQuery("select * from userInfo where username=? and pwd = ?", new String[]{user.getUserName(), user.getPwd()});
      /*  Cursor cursor = db.query("userInfo",null,"username=? and pwd = ?",new String[]{user.getUserName(), user.getPwd()},null,null,null);*/
        Log.i("ddd",user.getUserName());
        if (cursor.moveToNext()) {
            us = new User();
            us.setId(cursor.getInt(0));
            us.setUserName(cursor.getString(1));
            us.setPhone(cursor.getString(2));
            us.setMyself(cursor.getString(3));
            us.setSex(cursor.getString(4));
            us.setPwd(cursor.getString(5));
            us.setInterest(cursor.getString(6));


        }
        db.close();
        return us;
    }


    /**
     * @param cp
     * @return
     */
    @Override
    public List<User> findByCoreBar(PageBean cp) {
        db = mySql.getReadableDatabase();
        Cursor cursor = db.rawQuery("select * from userInfo limit "+((cp.getThisPage()-1)*cp.getStep())+","+cp.getStep(),null);
        List<User> list = new ArrayList<User>();
        while(cursor.moveToNext()){
            User user = new User();
            user.setId(cursor.getInt(0));
            user.setUserName(cursor.getString(1));
            user.setPhone(cursor.getString(2));
            user.setMyself(cursor.getString(3));
            user.setSex(cursor.getString(4));
            user.setPwd(cursor.getString(5));
            user.setInterest(cursor.getString(6));
            list.add(user);
        }
        db.close();
        return list;
    }


    /**
     * @return
     */
    @Override
    public List<User> findAll() {
        db = mySql.getReadableDatabase();
        Cursor cursor = db.rawQuery("select * from userInfo", null);
        List<User> list = new ArrayList<User>();
        while (cursor.moveToNext()) {
            User user = new User();
            user.setId(cursor.getInt(0));
            user.setUserName(cursor.getString(1));
            user.setPhone(cursor.getString(2));
            user.setMyself(cursor.getString(3));
            user.setSex(cursor.getString(4));
            user.setPwd(cursor.getString(5));
            user.setInterest(cursor.getString(6));
            list.add(user);
        }
        db.close();
        return list;

    }
    public static MySql getIntance(Context context) {
        if (mySql == null) {
            mySql = new MySql(context);
        }
        return mySql;
    }

}

标签：SQLite,String,安卓,Dao,public,cursor,user,new,id
来源： https://blog.csdn.net/shmilyhq/article/details/105900033

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