Android GreenDao简单使用

一些简单的配置都在上篇博客中

定义工具类
package soexample.umeng.com.day03greendao;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;

import java.util.List;

import soexample.umeng.com.day03greendao.greendao.DaoMaster;
import soexample.umeng.com.day03greendao.greendao.DaoSession;

public class SqlLiteUtils {

    private SQLiteDatabase db;
    private DaoMaster mDaoMaster;
    private DaoSession mSession;
//单例模式
    public SqlLiteUtils() { }

    private static SqlLiteUtils mSqlLiteUtilis;

    public static SqlLiteUtils getmSqlLiteUtilis(){
        if (mSqlLiteUtilis == null){
            mSqlLiteUtilis = new SqlLiteUtils();
        }
        return mSqlLiteUtilis;
    }

    public void initData(Context context){
        DaoMaster.DevOpenHelper qiang = new DaoMaster.DevOpenHelper( context, "jin" );
        db = qiang.getWritableDatabase();
        mDaoMaster = new DaoMaster( db );
        mSession= mDaoMaster.newSession();
    }
//简单的增删查改
    public void insert(User user){
        mSession.getUserDao().insert( user );
    }
    public List<User> queryAll(){
        return mSession.getUserDao().loadAll();
    }
    public User query(Long key){
       return mSession.getUserDao().load( key );
    }
    public void deleteAll(){
        mSession.getUserDao().deleteAll();
    }
    public void delete(String key){
        mSession.getUserDao().deleteByKey( Long.parseLong( key ) );
    }
    public void update(User user){
        mSession.getUserDao().update( user );
    }

}
在MainActivity布局里面定义按钮简单使用

package soexample.umeng.com.day03greendao;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

import java.util.List;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.activity_main );
        findViewById( R.id.addUser ).setOnClickListener( this );
        findViewById( R.id.delUser ).setOnClickListener( this );
        findViewById( R.id.updUser ).setOnClickListener( this );
        findViewById( R.id.queUser ).setOnClickListener( this );
        findViewById( R.id.queUserOne ).setOnClickListener( this );
        findViewById( R.id.delUserOne ).setOnClickListener( this );
        SqlLiteUtils.getmSqlLiteUtilis().initData( this );
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.addUser:
                User user = new User();
                user.setUsername( "17801130950" );
                user.setPassword( "1111111" );
                user.setAge( 18 );
                user.setSex( "男" );
                SqlLiteUtils.getmSqlLiteUtilis().insert( user );
                break;
            case R.id.delUser:
                SqlLiteUtils.getmSqlLiteUtilis().deleteAll();
                Log.i( "TAG", "删除成功" + "AAA" );
                break;
            case R.id.updUser:
                User two = SqlLiteUtils.getmSqlLiteUtilis().query( Long.parseLong( "24" ) );
                two.setUsername( "123456789" );
                SqlLiteUtils.getmSqlLiteUtilis().update( two );
                break;
            case R.id.queUser:
                List<User> list = SqlLiteUtils.getmSqlLiteUtilis().queryAll();
                for (int i = 0; i < list.size(); i++) {
                    if (list == null) {
                        Log.i( "TAG", "没有数据" );
                    } else {
                        Log.i( "TAG", "" + list.get( i ).getUsername() + "====" + list.get( i ).getId() );
                    }
                }
                break;
            case R.id.queUserOne:
                User query = SqlLiteUtils.getmSqlLiteUtilis().query( Long.parseLong( "1" ) );
                if (query == null) {
                    Log.i( "TAG", "没有数据" );
                } else {
                    Log.i( "TAG", query.getUsername() + query.getId() );
                }
                break;
            case R.id.delUserOne:
                SqlLiteUtils.getmSqlLiteUtilis().delete( "1" );
                Log.i( "TAG", "成功删除一条" );
                break;
        }
    }
}

定义一个实体类
@Entity
//设置主键
@Id(autoincrement = true)


package soexample.umeng.com.day03greendao;

import org.greenrobot.greendao.annotation.Entity;
import org.greenrobot.greendao.annotation.Id;
import org.greenrobot.greendao.annotation.Generated;
@Entity
public class User {
    @Id(autoincrement = true)
    private Long id;
    private String username;
    private String password;
    private int age;
    private String sex;

Ctrl+F9快捷键生成只需定义及格成员属性就可以了
    @Generated(hash = 1351765912)
    public User(Long id, String username, String password, int age, String sex) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
    }
    @Generated(hash = 586692638)
    public User() {
    }
    public Long getId() {
        return this.id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getUsername() {
        return this.username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() { return this.password; }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getAge() {
        return this.age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getSex() {
        return this.sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }

}