Cloudant 复制 android 中的所有数据

Question

我正在尝试为我的 android 应用程序进行用户注册。我能够成功地让用户注册并将他们的详细信息存储在 Cloudant 中。他们还可以使用注册时使用的 phone 登录。

但是，当我尝试使用另一个 phone 登录帐户时，它不起作用。是否可以从 Cloudant 复制所有数据，以便用户也可以登录到其他 phone？这是我的代码：

public class CloudantConnect {

    private static final String TAG = CloudantConnect.class.getSimpleName();
    private static final String DATASTORE_DIRECTORY = "data";

    private Datastore datastore;
    private IndexManager indexManager;

    private Replicator push_replicator;
    private Replicator pull_replicator;

    private Context context;
    private final Handler handler;
    private RegisterActivity register_listener;

    public CloudantConnect(Context context, String datastore_name) {
        this.context = context;

        // Set up information within its own folder in the application
        File path = this.context.getApplicationContext().getDir(DATASTORE_DIRECTORY, Context.MODE_PRIVATE);
        DatastoreManager manager = new DatastoreManager(path.getAbsolutePath());

        try {
            this.datastore = manager.openDatastore(datastore_name);
        } catch (DatastoreNotCreatedException e) {
            Log.e(TAG, "Unable to open Datastore", e);
        }

        // Reach here if datastore successfully created
        Log.d(TAG, "Successfully set up database at" + path.getAbsolutePath());

        // Set up replicator objects
        try {
            this.reloadReplicationSettings();
        } catch (URISyntaxException e) {
            Log.e(TAG, "Unable to construct remote URI from configuration", e);
        }

        this.handler = new Handler(Looper.getMainLooper());

        Log.d(TAG, "CloudantConnect set up " + path.getAbsolutePath());
    }


    /**
     * Creates new document for user details database storage
     * @param user to store user details into database
     * @return document of user details stored
     */
    public User createNewUserDocument(User user) {
        MutableDocumentRevision revision = new MutableDocumentRevision();
        revision.body = DocumentBodyFactory.create(user.asMap());

        try {
            BasicDocumentRevision created = this.datastore.createDocumentFromRevision(revision);
            return User.fromRevision(created);
        } catch (DocumentException e) {
            return null;
        }
    }

    /**
     * Sets replication listener
     */
    public void setReplicationListener(RegisterActivity listener) {
        this.register_listener = listener;
    }

    /**
     * Start push replication
     */
    public void startPushReplication() {
        if(this.push_replicator != null) {
            this.push_replicator.start();
        } else {
            throw new RuntimeException("Push replication not set up correctly");
        }
    }

    /**
     * Start pull replication
     */
    public void startPullReplication() {
        if(this.pull_replicator != null) {
            this.pull_replicator.start();
        } else {
            throw new RuntimeException("Pull replication not set up correctly");
        }
    }

    /**
     * Stop running replication
     */
    public void stopAllReplication() {
        if(this.push_replicator != null) {
            this.push_replicator.stop();
        }

        if(this.pull_replicator != null) {
            this.pull_replicator.stop();
        }
    }

    /**
     * Stop running replication and reloads replication settings
     * from the app's preferences.
     */
    public void reloadReplicationSettings() throws URISyntaxException {
        this.stopAllReplication();

        // Set up new replicator objects
        URI uri = this.createServerURI();

        // Push replication
        PushReplication push = new PushReplication();
        push.source = datastore;
        push.target = uri;
        push_replicator = ReplicatorFactory.oneway(push);
        push_replicator.getEventBus().register(this);

        // Pull replication
        PullReplication pull = new PullReplication();
        pull.source = uri;
        pull.target = datastore;
        pull_replicator = ReplicatorFactory.oneway(pull);
        pull_replicator.getEventBus().register(this);

        Log.d(TAG, "Set up replicators for URI:" + uri.toString());
    }

    /**
     * Calls when replication is completed
     */
    public void complete(ReplicationCompleted rc) {
        handler.post(new Runnable() {
            @Override
            public void run() {
                if(register_listener != null) {
                    register_listener.replicationComplete();
                }
            }
        });
    }

    /**
     * Calls when replication has error
     */
    public void error(ReplicationErrored re) {
        Log.e(TAG, "Replication error:", re.errorInfo.getException());
        handler.post(new Runnable() {
            @Override
            public void run() {
                if(register_listener != null) {
                    register_listener.replicationError();
                }
            }
        });
    }
}

Answer 1

看起来您已经获得了执行复制的所有代码。你真的从某个地方打电话给 startPullReplication() 吗？

如果您想在复制 completes/fails 时将 complete 和 error 回调到运行，则需要在它们上面添加 @Subscribe 注释所以当事件放在 EventBus.

上时它们会被触发

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