android数据保存之greendao

<span style="font-size:14px;">public class YeehotGeneratorDao {
public static void main(String[] args) throws Exception {
//DB_VESION,BEAN 版本号与 包路径
Schema schema = new Schema(1, "com.yeehot.greendao");
addTable(schema);
//第二个参数是我们刚刚的包db的路径。
new DaoGenerator().generateAll(schema, "/Users/yeehot/Desktop/a/GreendaoInfo/app/src/main/java-gen");
}
private static void addTable(Schema schema) {
// 创建一个实体，其实就是表名
Entity User = schema.addEntity("User");
//添加表的属性。
User.addIdProperty();
//添加字符串的属性
User.addStringProperty("email").notNull();
User.addStringProperty("passwd");
User.addStringProperty("userid");
}
}</span>

<span style="font-size:14px;">package com.yeehot.greendaoinfo;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import com.yeehot.greendaoinfo.db.DaoMaster;
import com.yeehot.greendaoinfo.db.DaoSession;
import com.yeehot.greendaoinfo.db.User;
import com.yeehot.greendaoinfo.db.UserDao;
import org.greenrobot.greendao.generator.Query;
import org.greenrobot.greendao.query.QueryBuilder;
import java.text.DateFormat;
import java.util.Date;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private SQLiteDatabase db;
private DaoMaster daoMaster;
private DaoSession daoSession;
private Cursor cursor;
private EditText email;
private Button add;
private Button search;
private Button delete;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
email= (EditText) findViewById(R.id.email);
add= (Button) findViewById(R.id.add);
search= (Button) findViewById(R.id.search);
delete= (Button) findViewById(R.id.delete);
CreateDB();
add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
addEmail();
}
});
search.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FindEmail();
}
});
delete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DeleteEmail();
}
});
}
private void CreateDB() {
// DevOpenHelper
DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(this, "yeehotdb", null);
db = helper.getWritableDatabase();
daoMaster = new DaoMaster(db);
daoSession = daoMaster.newSession();
}
private void addEmail() {
String emailinfo = email.getText().toString();
// 插入操作，简单到只要你创建一个 Java 对象
User note = new User(null,emailinfo,"1234","0001");
daoSession.getUserDao().insert(note);
}
private void FindEmail() {
Query query = daoSession.getUserDao().queryBuilder()
.where(UserDao.Properties.Email.eq(email.getText().toString()))
.orderAsc(UserDao.Properties.Id)
.build();
List list=query.list();
QueryBuilder.LOG_SQL = true;
QueryBuilder.LOG_VALUES = true;
}
private void DeleteEmail() {
// daoSession.getUserDao().deleteByKey(id);
daoSession.getUserDao().deleteAll();
}
}</span><strong style="font-size: 16px;">

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