数据库框架GreenDao

【GreenDao】
@推荐资料地址：
http://blog.csdn.net/wl1769127285/article/details/52369516
按照文档进行一步步的配置。
Dao包是自动生成的；

代码：

public class MainActivity extends AppCompatActivity {

    private UserDao dao;
    private EditText edit_name;
    private EditText edit_id;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edit_id = (EditText) findViewById(R.id.edit_id);
        edit_name = (EditText) findViewById(R.id.edit_name);

        dao = GreenDaoUtils.getSingleTon().getmDaoSession().getUserDao();
    }

    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_c:
                User insertData = new User(null, edit_name.getText().toString(), 21, false);
                long rowId = dao.insert(insertData);
                if (rowId > 0) {
                    Toast.makeText(MainActivity.this, "插入成功！", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(MainActivity.this, "插入失敗！", Toast.LENGTH_SHORT).show();
                }
                break;

            case R.id.btn_r:
                List<User> users = dao.loadAll();
                for (int i = 0; i < users.size(); i++) {
                    Log.i("woyaokk", "结果：" + users.get(i).toString());
                }
                break;

            case R.id.btn_u:
                List<User> userss = dao.loadAll();
                User user = new User(userss.get(0).getId(), edit_name.getText().toString(), 22, true);
                dao.update(user);
                break;

            case R.id.btn_d:
                String s = edit_id.getText().toString();
                long l = Long.parseLong(s);
                dao.deleteByKey(l);
                
                break;
        }
    }
}
===========================================================
public class MyApplication extends Application {

    static Context  context;

    @Override
    public void onCreate() {
        super.onCreate();
        context = this;
    }

    public static Context getApplication() {
        return context;
    }
}
===========================================================
public class GreenDaoUtils {

    private DaoMaster.DevOpenHelper mHelper;
    private SQLiteDatabase db;
    private DaoMaster mDaoMaster;
    private DaoSession mDaoSession;
    private static GreenDaoUtils greenDaoUtils;
    private GreenDaoUtils(){}
    public static GreenDaoUtils getSingleTon(){
        if (greenDaoUtils==null){
            greenDaoUtils=new GreenDaoUtils();
        }
        return greenDaoUtils;
    }
    private void initGreenDao(){
        mHelper=new DaoMaster.DevOpenHelper(MyApplication.getApplication(),"test-db",null);
        db=mHelper.getWritableDatabase();
        mDaoMaster=new DaoMaster(db);
        mDaoSession=mDaoMaster.newSession();
    }
    public DaoSession getmDaoSession() {
        if (mDaoMaster==null){
            initGreenDao();
        }
        return mDaoSession;
    }
    public SQLiteDatabase getDb() {
        if (db==null){
            initGreenDao();
        }
        return db;
    }

}
===========================================================
@Entity
public class User {
    @Id(autoincrement = true)
    private Long id;
    private String name;
    private int age;
    private boolean isBoy;
    public boolean getIsBoy() {
        return this.isBoy;
    }
    public void setIsBoy(boolean isBoy) {
        this.isBoy = isBoy;
    }
    public int getAge() {
        return this.age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getName() {
        return this.name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Long getId() {
        return this.id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    @Generated(hash = 1724489812)
    public User(Long id, String name, int age, boolean isBoy) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.isBoy = isBoy;
    }
    @Generated(hash = 586692638)
    public User() {
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age=" + age +
                ", isBoy=" + isBoy +
                '}';
    }
}

运行结果：