xutils 数据库

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//清单文件 android:name=".app.MyApplication"

public class MyApplication extends Application {

@Override

public void onCreate() {

super.onCreate();

//初始化xutils3

x.Ext.init(this);

//输出日志设置为false就是为了不影响性能

x.Ext.setDebug(false);

}

public static DbManager getDb() {

//对daoConfig初始化进行配置

DbManager.DaoConfig daoConfig= new DbManager.DaoConfig().setDbName("bw.db").setDbDir(newFile("/mnt/sdcard")).setDbVersion(1);

DbManager db =x.getDb(daoConfig);

return db;

}

@ContentView(R.layout.activity_main)

public class MainActivity extends AppCompatActivity {

@ViewInject(R.id.tv)

TextView tv;

@ViewInject(R.id.iv)

ImageView iv;

@Override

protected void onCreate(BundlesavedInstanceState) {

super.onCreate(savedInstanceState);

//setContentView(R.layout.activity_main);

/**

* 初始化注解

x.view().inject(this);

tv.setText("这是我使用xutils3的注解方式");

}

/**

* 1，方法必须私有限定,

* 2，方法参数形式必须和type对应的Listener接口一致.

* 3，注解参数value支持数组: value={id1, id2, id3}

* type默认View.OnClickListener.class，故此处可以简化不写，@Event(R.id.bt_main)

* 默认的是单击事件

// @Event(type =View.OnClickListener.class, value = R.id.tv)

@Event({R.id.tv, R.id.iv,R.id.bt_add, R.id.bt_find, R.id.bt_update, R.id.bt_delete})

private void testOnClick(Viewview) {

DbManager db = newMyApplication().getDb();

switch (view.getId()) {

case R.id.tv:

Toast.makeText(MainActivity.this, "这是我使用注解方式实现点击事件",Toast.LENGTH_SHORT).show();

getData();

break;

case R.id.iv:

Toast.makeText(MainActivity.this,"这是我使用注解方式实现点击事件", Toast.LENGTH_SHORT).show();

getServerData();

//通过ImageOptions.Builder().set方法设置图片的属性

ImageOptions options= new ImageOptions.Builder().setCircular(true).setCrop(true).setSize(100,100).setLoadingDrawableId(R.mipmap.ic_launcher).build();

x.image().bind(iv,"https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1489035859303&di=a701b850fecd73173a020305d46eec77&imgtype=0&src=http%3A%2F%2Fb.hiphotos.baidu.com%2Fzhidao%2Fpic%2Fitem%2F1f178a82b9014a90e7eb9d17ac773912b21bee47.jpg",options);

break;

case R.id.bt_add:

//插入

Toast.makeText(MainActivity.this, "保存数据",Toast.LENGTH_SHORT).show();

List<Student>students = new ArrayList<>();

students.add(newStudent("zhangsan"));

students.add(newStudent("lisi"));

students.add(newStudent("wangwu"));

students.add(newStudent("zhaoliu"));

try {

db.save(students);

Toast.makeText(MainActivity.this, "保存数据成功",Toast.LENGTH_SHORT).show();

} catch (DbExceptione) {

e.printStackTrace();

}

break;

case R.id.bt_find:

try {

Student student =db.findFirst(Student.class);

Log.i("xxx", student.toString());

List<Student> studentList = db.findAll(Student.class);

for (Studentstudent1 : studentList) {

Log.i("xxx", student1.toString());

}

} catch (DbExceptione) {

e.printStackTrace();

}

break;

case R.id.bt_update:

try {

//第一种方式更新第一个对象的名字

Student student =db.findFirst(Student.class);

/*student.setName("wowo");

db.update(student, "name");*/

//第二种方式

/* WhereBuilder b= WhereBuilder.b();

b.and("id", "=", student.getId());

KeyValue value = newKeyValue("name", "sisi");

db.update(Student.class, b, value);*/

//第三种方式

student.setName("xixi");

db.saveOrUpdate(student);

Toast.makeText(MainActivity.this,"更新成功", Toast.LENGTH_SHORT).show();

} catch (DbExceptione) {

e.printStackTrace();

}

break;

case R.id.bt_delete:

try {

//删除表中的所有数据

// db.delete(Student.class);

//根据条件删除表中的数据

WhereBuilder b =WhereBuilder.b();

b.and("id", ">", "5");

b.and("id","<", "8");

db.delete(Student.class, b);

Toast.makeText(MainActivity.this, "删除成功",Toast.LENGTH_SHORT).show();

} catch (DbExceptione) {

e.printStackTrace();

}

break;

}

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