GreenDao数据库增删改查

//首先是依赖

apply plugin: 'com.android.application'
////GreenDao的配置
apply plugin: 'org.greenrobot.greendao'
android {
    compileSdkVersion 26
    buildToolsVersion "26.0.1"

    defaultConfig {
        applicationId "com.example.myapplication"
        minSdkVersion 15
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
     //GreenDao的个性配置
    greendao {
        schemaVersion 1         //数据库版本
        daoPackage 'com.sn.greendaoycf.dao'    //自动生成工具类的包名
        targetGenDir 'src/main/java'        //路径
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:26.+'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'
     //GreenDao的配置
    compile 'org.greenrobot:greendao:3.2.2'

}

//整个项目中的build.gradle文件中进行设置

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.0'

        //GreenDao的配置
        classpath 'org.greenrobot:greendao-gradle-plugin:3.2.1'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

//User

package com.example.myapplication.bean;

import org.greenrobot.greendao.annotation.Generated;
import org.greenrobot.greendao.annotation.Id;

/** * Created by 123 on 2018/1/6. */

public class User {
    @Id
    private Long id;

    // @NotNull
    private String text;
    private String comment;
    private java.util.Date date;


    @Generated(hash = 207472317)
    public User(Long id, String text, String comment, java.util.Date date) {
        this.id = id;
        this.text = text;
        this.comment = comment;
        this.date = date;
    }
    @Generated(hash = 586692638)
    public User() {
    }
    public Long getId() {
        return this.id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getText() {
        return this.text;
    }
    public void setText(String text) {
        this.text = text;
    }
    public String getComment() {
        return this.comment;
    }
    public void setComment(String comment) {
        this.comment = comment;
    }
    public java.util.Date getDate() {
        return this.date;
    }
    public void setDate(java.util.Date date) {
        this.date = date;
    }
}

//dao包 DaoMaster

package com.example.myapplication.dao;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.util.Log;

import org.greenrobot.greendao.AbstractDaoMaster;
import org.greenrobot.greendao.database.StandardDatabase;
import org.greenrobot.greendao.database.Database;
import org.greenrobot.greendao.database.DatabaseOpenHelper;
import org.greenrobot.greendao.identityscope.IdentityScopeType;


// THIS CODE IS GENERATED BY greenDAO, DO NOT EDIT.
/** * Master of DAO (schema version 1): knows all DAOs. */
public class DaoMaster extends AbstractDaoMaster {
    public static final int SCHEMA_VERSION = 1;

    /** Creates underlying database table using DAOs. */
    public static void createAllTables(Database db, boolean ifNotExists) {
        UserDao.createTable(db, ifNotExists);
    }

    /** Drops underlying database table using DAOs. */
    public static void dropAllTables(Database db, boolean ifExists) {
        UserDao.dropTable(db, ifExists);
    }

    /** * WARNING: Drops all table on Upgrade! Use only during development. * Convenience method using a {@link DevOpenHelper}. */
    public static DaoSession newDevSession(Context context, String name) {
        Database db = new DevOpenHelper(context, name).getWritableDb();
        DaoMaster daoMaster = new DaoMaster(db);
        return daoMaster.newSession();
    }

    public DaoMaster(SQLiteDatabase db) {
        this(new StandardDatabase(db));
    }

    public DaoMaster(Database db) {
        super(db, SCHEMA_VERSION);
        registerDaoClass(UserDao.class);
    }

    public DaoSession newSession() {
        return new DaoSession(db, IdentityScopeType.Session, daoConfigMap);
    }

    public DaoSession newSession(IdentityScopeType type) {
        return new DaoSession(db, type, daoConfigMap);
    }

    /** * Calls {@link #createAllTables(Database, boolean)} in {@link #onCreate(Database)} - */
    public static abstract class OpenHelper extends DatabaseOpenHelper {
        public OpenHelper(Context context, String name) {
            super(context, name, SCHEMA_VERSION);
        }

        public OpenHelper(Context context, String name, CursorFactory factory) {
            super(context, name, factory, SCHEMA_VERSION);
        }

        @Override
        public void onCreate(Database db) {
            Log.i("greenDAO", "Creating tables for schema version " + SCHEMA_VERSION);
            createAllTables(db, false);
        }
    }

    /** WARNING: Drops all table on Upgrade! Use only during development. */
    public static class DevOpenHelper extends OpenHelper {
        public DevOpenHelper(Context context, String name) {
            super(context, name);
        }

        public DevOpenHelper(Context context, String name, CursorFactory factory) {
            super(context, name, factory);
        }

        @Override
        public void onUpgrade(Database db, int oldVersion, int newVersion) {
            Log.i("greenDAO", "Upgrading schema from version " + oldVersion + " to " + newVersion + " by dropping all tables");
            dropAllTables(db, true);
            onCreate(db);
        }
    }

}

//DaoSession

package com.example.myapplication.dao;

import com.example.myapplication.bean.User;

import org.greenrobot.greendao.AbstractDao;
import org.greenrobot.greendao.AbstractDaoSession;
import org.greenrobot.greendao.database.Database;
import org.greenrobot.greendao.identityscope.IdentityScopeType;
import org.greenrobot.greendao.internal.DaoConfig;

import java.util.Map;

/** * Created by 123 on 2018/1/6. */

public class DaoSession extends AbstractDaoSession {
    private final DaoConfig userDaoConfig;

    private final UserDao userDao;

    public DaoSession(Database db, IdentityScopeType type, Map>, DaoConfig>
            daoConfigMap) {
        super(db);

        userDaoConfig = daoConfigMap.get(UserDao.class).clone();
        userDaoConfig.initIdentityScope(type);

        userDao = new UserDao(userDaoConfig, this);

        registerDao(User.class, userDao);
    }

    public void clear() {
        userDaoConfig.clearIdentityScope();
    }

    public UserDao getUserDao() {
        return userDao;
    }
}

//UserDao

package com.example.myapplication.dao;

import android.database.Cursor;
import android.database.sqlite.SQLiteStatement;

import com.example.myapplication.bean.User;

import org.greenrobot.greendao.AbstractDao;
import org.greenrobot.greendao.Property;
import org.greenrobot.greendao.database.Database;
import org.greenrobot.greendao.database.DatabaseStatement;
import org.greenrobot.greendao.internal.DaoConfig;

/** * Created by 123 on 2018/1/6. */

public class UserDao extends AbstractDao {
    public static final String TABLENAME = "USER";
    public static class Properties {
        public final static Property Id = new Property(0, Long.class, "id", true, "_id");
        public final static Property Text = new Property(1, String.class, "text", false, "TEXT");
        public final static Property Comment = new Property(2, String.class, "comment", false, "COMMENT");
        public final static Property Date = new Property(3, java.util.Date.class, "date", false, "DATE");
    }

    public UserDao(DaoConfig config) {
        super(config);
    }
    public UserDao(DaoConfig config, DaoSession daoSession) {
        super(config, daoSession);
    }
    public static void createTable(Database db, boolean ifNotExists) {
        String constraint = ifNotExists? "IF NOT EXISTS ": "";
        db.execSQL("CREATE TABLE " + constraint + "\"USER\" (" + //
                "\"_id\" INTEGER PRIMARY KEY ," + // 0: id
                "\"TEXT\" TEXT," + // 1: text
                "\"COMMENT\" TEXT," + // 2: comment
                "\"DATE\" INTEGER);"); // 3: date
    }
    public static void dropTable(Database db, boolean ifExists) {
        String sql = "DROP TABLE " + (ifExists ? "IF EXISTS " : "") + "\"USER\"";
        db.execSQL(sql);
    }
    @Override
    public User readEntity(Cursor cursor, int offset) {
        User entity = new User( //
                cursor.isNull(offset + 0) ? null : cursor.getLong(offset + 0), // id
                cursor.isNull(offset + 1) ? null : cursor.getString(offset + 1), // text
                cursor.isNull(offset + 2) ? null : cursor.getString(offset + 2), // comment
                cursor.isNull(offset + 3) ? null : new java.util.Date(cursor.getLong(offset + 3)) // date
        );
        return entity;
    }

    @Override
    public Long readKey(Cursor cursor, int offset) {
        return cursor.isNull(offset + 0) ? null : cursor.getLong(offset + 0);
    }

    @Override
    public void readEntity(Cursor cursor, User entity, int offset) {
        entity.setId(cursor.isNull(offset + 0) ? null : cursor.getLong(offset + 0));
        entity.setText(cursor.isNull(offset + 1) ? null : cursor.getString(offset + 1));
        entity.setComment(cursor.isNull(offset + 2) ? null : cursor.getString(offset + 2));
        entity.setDate(cursor.isNull(offset + 3) ? null : new java.util.Date(cursor.getLong(offset + 3)));
    }

    @Override
    protected final void bindValues(DatabaseStatement stmt, User entity) {
        stmt.clearBindings();

        Long id = entity.getId();
        if (id != null) {
            stmt.bindLong(1, id);
        }

        String text = entity.getText();
        if (text != null) {
            stmt.bindString(2, text);
        }

        String comment = entity.getComment();
        if (comment != null) {
            stmt.bindString(3, comment);
        }

        java.util.Date date = entity.getDate();
        if (date != null) {
            stmt.bindLong(4, date.getTime());
        }
    }


    @Override
    protected final void bindValues(SQLiteStatement stmt, User entity) {
        stmt.clearBindings();

        Long id = entity.getId();
        if (id != null) {
            stmt.bindLong(1, id);
        }

        String text = entity.getText();
        if (text != null) {
            stmt.bindString(2, text);
        }

        String comment = entity.getComment();
        if (comment != null) {
            stmt.bindString(3, comment);
        }

        java.util.Date date = entity.getDate();
        if (date != null) {
            stmt.bindLong(4, date.getTime());
        }
    }

    @Override
    protected final Long updateKeyAfterInsert(User entity, long rowId) {
        entity.setId(rowId);
        return rowId;
    }

    @Override
    public Long getKey(User entity) {
        if(entity != null) {
            return entity.getId();
        } else {
            return null;
        }
    }

    @Override
    public boolean hasKey(User entity) {
        return entity.getId() != null;
    }

    @Override
    protected final boolean isEntityUpdateable() {
        return true;
    }
}

//MainActivity

package com.example.myapplication;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.example.myapplication.bean.User;
import com.example.myapplication.dao.DaoSession;
import com.example.myapplication.dao.UserDao;

import org.greenrobot.greendao.query.Query;

import java.util.Date;
import java.util.List;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{
    private UserDao userDao;
    private AutoCompleteTextView text;
    private AutoCompleteTextView comment;
    private Button butAddData;
    private Button butShowData;
    private Button butDelData;
    private Button butModifyData;
    private TextView tShow;
    private EditText num;
    private Query userQuery;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        DaoSession daoSession = ((MyApplication) getApplication()).getDaoSession();
        userDao = daoSession.getUserDao();
        initView();
    }

    private void initView() {
        text = (AutoCompleteTextView) findViewById(R.id.edit_text);
        comment = (AutoCompleteTextView) findViewById(R.id.edit_comment);
        tShow = (TextView) findViewById(R.id.text_show_data);
        num = (EditText) findViewById(R.id.exit_id);
        butAddData = (Button) findViewById(R.id.but_add_data);
        butShowData  = (Button) findViewById(R.id.but_show_data);
        butDelData = (Button) findViewById(R.id.but_del_data);
        butModifyData = (Button) findViewById(R.id.but_modify_data);

        butAddData.setOnClickListener(this);
        butShowData.setOnClickListener(this);
        butDelData.setOnClickListener(this);
        butModifyData.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.but_add_data://增
                String test = text.getText().toString();
                String con = comment.getText().toString();

                User user = new User();
                user.setComment(con);
                user.setDate(new Date());
                user.setText(test);

                userDao.insert(user);
                text.setText("");
                comment.setText("");
                break;
            case R.id.but_show_data://查询
                //按找id z-a排序查询
                // userQuery = userDao.queryBuilder().orderDesc(UserDao.Properties.Id).build();
                //按找id a-a排序查询
                userQuery = userDao.queryBuilder().orderAsc(UserDao.Properties.Id).build();
                //查询满足指定属性值的结果
                //userQuery = userDao.queryBuilder().where(UserDao.Properties.Text.eq(33),UserDao.Properties.Comment.eq(22)).build();
                List datalist= userQuery.list();
                StringBuffer res = new StringBuffer();
                for (User user1 : datalist) {
                    res.append("id= "+user1.getId());
                    res.append(" text="+user1.getText());
                    res.append(" comment="+user1.getComment()+"\n");
                    //res.append(" date="+user1.getDate()+"\n");
                }
                tShow.setText(res.toString());
                break;
            case R.id.but_del_data://删除
                String index = num.getText().toString().trim();
                if(TextUtils.isEmpty(index)){
                    Toast.makeText(MainActivity.this, "不能输入为空", Toast.LENGTH_SHORT).show();
                    return;
                }
                userDao.deleteByKey(Long.valueOf(index));
                num.setText("");
                break;
            case R.id.but_modify_data://修改
                String www = num.getText().toString().trim();
                if(TextUtils.isEmpty(www)){
                    Toast.makeText(MainActivity.this, "不能输入为空", Toast.LENGTH_SHORT).show();
                    return;
                }

                String test2 = text.getText().toString();
                String con2 = comment.getText().toString();
                User user2 = new User();
                user2.setId(Long.valueOf(www));
                user2.setComment(con2);
                user2.setDate(new Date());
                user2.setText(test2);
                userDao.update(user2);

                text.setText("");
                comment.setText("");
                num.setText("");
                break;
        }
    }
    }

//MyApplication

package com.example.myapplication;

import android.app.Application;

import com.example.myapplication.dao.DaoMaster;
import com.example.myapplication.dao.DaoSession;

import org.greenrobot.greendao.database.Database;

/** * Created by 123 on 2018/1/6. */

public class MyApplication extends Application{
    public static final boolean ENCRYPTED = true;
    private DaoSession daoSession;

    @Override
    public void onCreate() {
        super.onCreate();
        DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(this, ENCRYPTED ? "notes-db-encrypted" : "notes-db");
        Database db = !ENCRYPTED ? helper.getEncryptedWritableDb("super-secret") : helper.getWritableDb();
        daoSession = new DaoMaster(db).newSession();

    }
    public DaoSession getDaoSession() {
        return daoSession;
    }
}

//xml

<LinearLayout  android:orientation="vertical" 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="com.example.myapplication.MainActivity">


    <LinearLayout  android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal">

        <AutoCompleteTextView  android:id="@+id/edit_comment" android:layout_width="0dp" android:hint="comment" android:layout_height="wrap_content" android:layout_weight="1" android:padding="5dp" />

        <AutoCompleteTextView  android:id="@+id/edit_text" android:layout_width="0dp" android:layout_height="wrap_content" android:hint="text" android:layout_weight="1" android:padding="5dp" />
    LinearLayout>

    <Button  android:id="@+id/but_add_data" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="添加数据" android:padding="5dp" />
    <ImageView  android:layout_width="match_parent" android:layout_height="3dp" android:background="#ff0"/>
    <Button  android:layout_width="match_parent" android:layout_height="wrap_content" android:text="显示数据" android:id="@+id/but_show_data"/>
    <TextView  android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/text_show_data" android:layout_gravity="center" android:gravity="center" android:hint="这里将显示数据库中的数据"/>

    <Button  android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/but_del_data" android:text="删除"/>

    <EditText  android:layout_width="match_parent" android:layout_height="40dp" android:hint="输入要删除或者要修改的id值" android:id="@+id/exit_id" android:inputType="number" />
    <Button  android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/but_modify_data" android:text="修改"/>

LinearLayout>

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