黑莓:如何使用PersistableRIMKeyStore?

PersistableRIMKeyStore用于持久化RIM密钥存储。要持久化用户数据accross resets,只需使用PersistentStore,如果要保护deta,可以使用ContentProtectedHashtable或ContentProtectedVector。

如果您使用与“PersistentStoreDemo”相同的存储区,如果您不知道可以通过进入File->Import->Blackberry Samples获得该存储区,则可以加密存储区中的信息。除此之外,如果用户启用了内容保护,则可以使用ContentProtectedHashtable自动知道该信息将被加密。因此,如果没有内容保护,信息将被加密一次,打开它,它将被双重加密,并与应用程序名称空间的难以猜测的长散列一起存储(显然,因为注册存储需要它)。下面是我使用的:

package ca.dftr.phillyd.lib.persistables;

import net.rim.device.api.system.ApplicationDescriptor;
import net.rim.device.api.util.ContentProtectedHashtable;
import net.rim.device.api.util.Persistable;

/**
 * Basic class for storing application specific information. 
 * Information such as application settings or whether the license agreement was accepted.
 * For more complex and specific classes they should be implemented separately and implement persistable 
 * @author deforbes
 */
public class AppInfo extends ContentProtectedHashtable  implements Persistable {

    private String _appName = null;
    private String _version = null;

    /**
     * Constructs the application info, creates and persists a hashtable for application settings.
     * @param uniqueHexAppIdentifier Can be automatically created in resource class (BUNDLE_ID) or generated using other unique information.
     */
    public AppInfo() {    
        ApplicationDescriptor appDesc = ApplicationDescriptor.currentApplicationDescriptor();
        _appName = appDesc.getName();
        _version = appDesc.getVersion();
    }

    /**
     * Get the Name of the application
     * @return The application name from the app descriptor
     */
    public String getName()
    {
        return _appName;
    }

    /**
     * Get the Version of the application
     * @return The application version from the app descriptor
     */
    public String getVersion()
    {
        return _version;
    }
}

以及一类常量(如果需要,可以包含在上面的内容中)。例如,从我的PhillyD应用程序:

包裹约dftr.phillyd.库持久性;

/**
 * Keys for the AppInfo array
 * @author deforbes
 */
public class AppInfoKeys {
    public static final String QUALITY = "Quality";
    public static final String CHANNEL = "Channel";
    public static final String CHANNEL_NAME = "Channel_Name";
    public static final String SEARCH = "Search";
    public static final String LICENSE_ACCEPTED = "isLicenseAccepted";
    public static final String VIDEOS_PER_PAGE = "NumPerPage";
    public static final Boolean DOWNLOAD_THUMBS = new Boolean(true);
}