Reaml 数据库版本升级

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import io.realm.DynamicRealm;import io.realm.RealmMigration;import io.realm.RealmObjectSchema;import io.realm.RealmSchema;/** * 修改版本号后会执行此代码 * 当版本号修改为 2 时 ，判断老版本号为1时此处举 例如 添加字段 'sex' * */public class DbMigration implements RealmMigration {    @Override    public void migrate(DynamicRealm realm, long oldVersion, long newVersion) {        RealmSchema schema = realm.getSchema();         if (oldVersion == 1){             RealmObjectSchema petSchema = schema.get("Person");             petSchema.addField("sex",int.class,null);             oldVersion++;        }    }}

findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Person person = new Person();                person.setAge(11);                person.setName("xiao");                person.setSex(1);                realm.beginTransaction();                realm.copyToRealmOrUpdate(person);                realm.commitTransaction();                Log.i("insert ------", "" + person.getName() + " " + person.getAge());            }        });        //2        findViewById(R.id.button2).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Person person = realm.where(Person.class).equalTo("name","xiao").findFirst();                Log.i("info ------","" + person.getName() + " "+ person.getAge() +"  "+person.getSex());            }        });

官网 https://realm.io/docs/java/latest/

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