如何使用 Realm 在 Android 中读取联系人？

Question

我找不到从 Android 读取联系人并将其保存在 Realm 中的任何解决方案。以前有人做过吗？

我知道我必须使用Contacts Provider，但这就是我所知道的。 AFAIK，Realm 不支持 Cursor 所以...还有什么？

编辑：

realm.executeTransaction(new Realm.Transaction() {
        @Override
        public void execute(Realm realm) {
            Contact realmContact = new Contact();
            String filter = "" + ContactsContract.Contacts.HAS_PHONE_NUMBER + " > 0 and "
                    + ContactsContract.CommonDataKinds.Phone.TYPE +"="
                    + ContactsContract.CommonDataKinds.Phone.TYPE_MAIN;

            Cursor phones = getActivity()
                    .getContentResolver()
                    .query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, filter, null, null);

            while (phones.moveToNext()) {
                String id = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone._ID));
                String name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                realmContact.setId(id);
                realmContact.setName(name);
                realmContact.setNumber(phoneNumber);
                realmContact.setIsBeingSaved(true);
                realm.insertOrUpdate(realmContact);
            }

            /** merge mechanism */
            realm.where(Contact.class)
                    .equalTo("isBeingSaved", false)
                    .findAll()
                    .deleteAllFromRealm(); // delete all non-saved data
            for(Contact contact : realm.where(Contact.class).findAll()) {
                realmContact.setIsBeingSaved(false); // reset all save state
            }

联系人.class

public class Contact extends RealmObject{

@PrimaryKey
private String id;

@Index
private String name;

@Index
private String number;

@Index
private boolean isBeingSaved;

public String getId() {
    return id;
}

public void setId(String id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getNumber() {
    return number;
}

public void setNumber(String number) {
    this.number = number;
}

public boolean getIsBeingSaved() {
    return isBeingSaved;
}

public void setIsBeingSaved(boolean beingSaved) {
    isBeingSaved = beingSaved;
}

}

Answer 1

创建RealmObject，从content provider读取数据，将数据保存到RealmObject，将数据保存到Realm中：

// background thread
Realm realm = null;
try {
    realm = Realm.getDefaultInstance();
    realm.executeTransaction(new Realm.Transaction() {
        @Override
        public void execute(Realm realm) {
            RealmContact realmContact = new RealmContact();
            Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
            while (phones.moveToNext()) {
               String name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
               String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
               realmContact.setName(name);
               realmContact.setPhoneNumber(phoneNumber);
               realm.insertOrUpdate(realmContact);
            }
        }
    });
} finally {
    if(realm != null) {
        realm.close();
    }
}

编辑：好的，这是合并数据并删除不在您保存的列表中的所有数据的技巧

public class RealmContract extends RealmObject {
    @PrimaryKey
    private long id;

    @Index
    private String name;

    @Index
    private String phoneNumber;

    @Index
    private boolean isBeingSaved;

    //getters, setters
}

然后合并：

// background thread
Realm realm = null;
try {
    realm = Realm.getDefaultInstance();
    realm.executeTransaction(new Realm.Transaction() {
        @Override
        public void execute(Realm realm) {
            RealmContact realmContact = new RealmContact();
            Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
            while (phones.moveToNext()) {
               String id = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds._ID));
               String name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
               String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
               realmContact.setId(id);
               realmContact.setName(name);
               realmContact.setPhoneNumber(phoneNumber);
               realmContact.setIsBeingSaved(true);
               realm.insertOrUpdate(realmContact);
            }
            realm.where(RealmContact.class)
                 .equalTo(RealmContactFields.IS_BEING_SAVED, false) // compile 'dk.ilios:realmfieldnameshelper:1.0.0'
                 .findAll()
                 .deleteAllFromRealm(); // delete all non-saved data
            for(RealmContact realmContact : realm.where(RealmContact.class).findAll()) { // realm 0.89.0+
                realmContact.setIsBeingSaved(false); // reset all save state
            }
        }
    });
} finally {
    if(realm != null) {
        realm.close();
    }
}

---

编辑：请参阅 OP 的其他问题以可靠地读取联系人数据（因为联系人 LOOKUP_ID 存在问题并确保 ID 正确）：Obtaining contacts from content provider without duplicates or invalid contacts, and save to Realm

Answer 2

您可以创建一个模型类来存储联系人所需的数据

然后在模型类中使用Cursor获取数据和设置数据。

将光标数据保存在模型对象列表中。

然后在单个事务中插入所有模型对象，因为每个对象事务有开销并减慢我们的应用程序