package org.xutils.sample;
import android.view.View;
import android.widget.TextView;
import org.xutils.DbManager;
import org.xutils.common.util.KeyValue;
import org.xutils.db.sqlite.WhereBuilder;
import org.xutils.db.table.DbModel;
import org.xutils.ex.DbException;
import org.xutils.sample.db.Child;
import org.xutils.sample.db.Parent;
import org.xutils.view.annotation.ContentView;
import org.xutils.view.annotation.Event;
import org.xutils.view.annotation.ViewInject;
import org.xutils.x;
import java.io.File;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
/**
* Created by wyouflf on 15/11/4.
*/
@ContentView(R.layout.fragment_db)
public class DbFragment extends BaseFragment {
DbManager.DaoConfig daoConfig = new DbManager.DaoConfig()
.setDbName("test.db")
// 不设置dbDir时, 默认存储在app的私有目录.
.setDbDir(new File("/sdcard")) // "sdcard"的写法并非最佳实践, 这里为了简单, 先这样写了.
.setDbVersion(2)
.setDbOpenListener(new DbManager.DbOpenListener() {
@Override
public void onDbOpened(DbManager db) {
// 开启WAL, 对写入加速提升巨大
db.getDatabase().enableWriteAheadLogging();
}
})
.setDbUpgradeListener(new DbManager.DbUpgradeListener() {
@Override
public void onUpgrade(DbManager db, int oldVersion, int newVersion) {
// TODO: ...
// db.addColumn(...);
// db.dropTable(...);
// ...
// or
// db.dropDb();
}
});
@ViewInject(R.id.tv_db_result)
private TextView tv_db_result;
@Event(R.id.btn_test_db)
private void onTestDbClick(View view) {
// 一对多: (本示例的代码)
// 自己在多的一方(child)保存另一方的(parentId), 查找的时候用parentId查parent或child.
// 一对一:
// 在任何一边保存另一边的Id并加上唯一属性: @Column(name = "parentId", property = "UNIQUE")
// 多对多:
// 再建一个关联表, 保存两边的id. 查询分两步: 先查关联表得到id, 再查对应表的属性.
String temp = "";
try {
DbManager db = x.getDb(daoConfig);
Child child = new Child();
child.setName("child's name");
Parent test = db.selector(Parent.class).where("id", "in", new int[]{1, 3, 6}).findFirst();
// long count = db.selector(Parent.class).where("id", "in", new int[]{1, 3, 6}).count();
// Parent test = db.selector(Parent.class).where("id", "between", new String[]{"1", "5"}).findFirst();
if (test != null) {
child.setParentId(test.getId());
temp += "first parent:" + test + "\n";
tv_db_result.setText(temp);
}
Parent parent = new Parent();
parent.name = "测试" + System.currentTimeMillis();
parent.setAdmin(true);
parent.setEmail("wyouflf@qq.com");
parent.setTime(new Date());
parent.setDate(new java.sql.Date(new Date().getTime()));
//db.save(parent);
db.saveBindingId(parent);
db.saveBindingId(child);//保存对象关联数据库生成的id
List<Child> children = db.selector(Child.class).findAll();
temp += "children size:" + children.size() + "\n";
tv_db_result.setText(temp);
if (children.size() > 0) {
temp += "last children:" + children.get(children.size() - 1) + "\n";
tv_db_result.setText(temp);
}
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DATE, -1);
calendar.add(Calendar.HOUR, 3);
List<Parent> list = db.selector(Parent.class)
.where("id", "<", 54)
.and("time", ">", calendar.getTime())
.orderBy("id")
.limit(10).findAll();
temp += "find parent size:" + list.size() + "\n";
tv_db_result.setText(temp);
if (list.size() > 0) {
temp += "last parent:" + list.get(list.size() - 1) + "\n";
tv_db_result.setText(temp);
}
// test update
parent.name = "hahaha123";
parent.setEmail("wyouflf@gmail.com");
db.update(parent);
db.update(parent, "name", "email");
db.update(Parent.class,
WhereBuilder.b("id", "=", 1).and("isAdmin", "=", true),
new KeyValue("name", "test_name"), new KeyValue("isAdmin", false));
Parent entity = child.getParent(db);
temp += "find by id:" + entity.toString() + "\n";
tv_db_result.setText(temp);
List<DbModel> dbModels = db.selector(Parent.class)
.groupBy("name")
.select("name", "count(name) as count").findAll();
temp += "group by result:" + dbModels.get(0).getDataMap() + "\n";
tv_db_result.setText(temp);
} catch (Throwable e) {
temp += "error :" + e.getMessage() + "\n";
tv_db_result.setText(temp);
}
}
@Event(R.id.btn_test_db2)
private void onTestDb2Click(View view) {
tv_db_result.setText("wait...");
x.task().run(new Runnable() { // 异步执行
@Override
public void run() {
DbManager db = x.getDb(daoConfig);
String result = "";
List<Parent> parentList = new ArrayList<Parent>();
for (int i = 0; i < 1000; i++) {
Parent parent = new Parent();
parent.setAdmin(true);
parent.setDate(new java.sql.Date(1234));
parent.setTime(new Date());
parent.setEmail(i + "_@qq.com");
parentList.add(parent);
}
long start = System.currentTimeMillis();
for (Parent parent : parentList) {
try {
db.save(parent);
} catch (DbException ex) {
ex.printStackTrace();
}
}
result += "插入1000条数据:" + (System.currentTimeMillis() - start) + "ms\n";
start = System.currentTimeMillis();
try {
parentList = db.selector(Parent.class).orderBy("id", true).limit(1000).findAll();
} catch (DbException ex) {
ex.printStackTrace();
}
result += "查找1000条数据:" + (System.currentTimeMillis() - start) + "ms\n";
start = System.currentTimeMillis();
try {
db.delete(parentList);
} catch (DbException ex) {
ex.printStackTrace();
}
result += "删除1000条数据:" + (System.currentTimeMillis() - start) + "ms\n";
// 批量插入
parentList = new ArrayList<Parent>();
for (int i = 0; i < 1000; i++) {
Parent parent = new Parent();
parent.setAdmin(true);
parent.setDate(new java.sql.Date(1234));
parent.setTime(new Date());
parent.setEmail(i + "_@qq.com");
parentList.add(parent);
}
start = System.currentTimeMillis();
try {
db.save(parentList);
} catch (DbException ex) {
ex.printStackTrace();
}
result += "批量插入1000条数据:" + (System.currentTimeMillis() - start) + "ms\n";
try {
parentList = db.selector(Parent.class).orderBy("id", true).limit(1000).findAll();
db.delete(parentList);
} catch (DbException ex) {
ex.printStackTrace();
}
final String finalResult = result;
x.task().post(new Runnable() { // UI同步执行
@Override
public void run() {
tv_db_result.setText(finalResult);
}
});
}
});
}
}