android.content.ContentProviderClient#getType ( )源码实例Demo

/**
 * Gets the content URI builder for a specified type.
 *
 * Supported types include QUERY_PATH_DICT_INFO, which takes the locale as
 * the extraPath argument, and QUERY_PATH_DATAFILE, which needs a wordlist ID
 * as the extraPath argument.
 *
 * @param clientId the clientId to use
 * @param contentProviderClient the instance of content provider client
 * @param queryPathType the path element encoding the type
 * @param extraPath optional extra argument for this type (typically word list id)
 * @return a builder that can build the URI for the best supported protocol version
 * @throws RemoteException if the client can't be contacted
 */
private static Uri.Builder getContentUriBuilderForType(final String clientId,
        final ContentProviderClient contentProviderClient, final String queryPathType,
        final String extraPath) throws RemoteException {
    // Check whether protocol v2 is supported by building a v2 URI and calling getType()
    // on it. If this returns null, v2 is not supported.
    final Uri.Builder uriV2Builder = getProviderUriBuilder(clientId);
    uriV2Builder.appendPath(queryPathType);
    uriV2Builder.appendPath(extraPath);
    uriV2Builder.appendQueryParameter(QUERY_PARAMETER_PROTOCOL,
            QUERY_PARAMETER_PROTOCOL_VALUE);
    if (null != contentProviderClient.getType(uriV2Builder.build())) return uriV2Builder;
    // Protocol v2 is not supported, so create and return the protocol v1 uri.
    return getProviderUriBuilder(extraPath);
}
 

/**
 * Gets the content URI builder for a specified type.
 *
 * Supported types include QUERY_PATH_DICT_INFO, which takes the locale as
 * the extraPath argument, and QUERY_PATH_DATAFILE, which needs a wordlist ID
 * as the extraPath argument.
 *
 * @param clientId the clientId to use
 * @param contentProviderClient the instance of content provider client
 * @param queryPathType the path element encoding the type
 * @param extraPath optional extra argument for this type (typically word list id)
 * @return a builder that can build the URI for the best supported protocol version
 * @throws RemoteException if the client can't be contacted
 */
private static Uri.Builder getContentUriBuilderForType(final String clientId,
        final ContentProviderClient contentProviderClient, final String queryPathType,
        final String extraPath) throws RemoteException {
    // Check whether protocol v2 is supported by building a v2 URI and calling getType()
    // on it. If this returns null, v2 is not supported.
    final Uri.Builder uriV2Builder = getProviderUriBuilder(clientId);
    uriV2Builder.appendPath(queryPathType);
    uriV2Builder.appendPath(extraPath);
    uriV2Builder.appendQueryParameter(QUERY_PARAMETER_PROTOCOL,
            QUERY_PARAMETER_PROTOCOL_VALUE);
    if (null != contentProviderClient.getType(uriV2Builder.build())) return uriV2Builder;
    // Protocol v2 is not supported, so create and return the protocol v1 uri.
    return getProviderUriBuilder(extraPath);
}
 

/**
 * Gets the content URI builder for a specified type.
 *
 * Supported types include QUERY_PATH_DICT_INFO, which takes the locale as
 * the extraPath argument, and QUERY_PATH_DATAFILE, which needs a wordlist ID
 * as the extraPath argument.
 *
 * @param clientId the clientId to use
 * @param contentProviderClient the instance of content provider client
 * @param queryPathType the path element encoding the type
 * @param extraPath optional extra argument for this type (typically word list id)
 * @return a builder that can build the URI for the best supported protocol version
 * @throws RemoteException if the client can't be contacted
 */
private static Uri.Builder getContentUriBuilderForType(final Context context, final String clientId,
        final ContentProviderClient contentProviderClient, final String queryPathType,
        final String extraPath) throws RemoteException {
    // Check whether protocol v2 is supported by building a v2 URI and calling getType()
    // on it. If this returns null, v2 is not supported.
    final Uri.Builder uriV2Builder = getProviderUriBuilder(context, clientId);
    uriV2Builder.appendPath(queryPathType);
    uriV2Builder.appendPath(extraPath);
    uriV2Builder.appendQueryParameter(QUERY_PARAMETER_PROTOCOL,
            QUERY_PARAMETER_PROTOCOL_VALUE);
    if (null != contentProviderClient.getType(uriV2Builder.build())) return uriV2Builder;
    // Protocol v2 is not supported, so create and return the protocol v1 uri.
    return getProviderUriBuilder(context, extraPath);
}
 

@Override
public String getType(Uri uri) {
    String targetAuthority = uri.getQueryParameter(Env.EXTRA_TARGET_AUTHORITY);
    if (!TextUtils.isEmpty(targetAuthority) && !TextUtils.equals(targetAuthority, uri.getAuthority())) {
        ContentProviderClient client = getContentProviderClient(targetAuthority);
        try {
            return client.getType(buildNewUri(uri, targetAuthority));
        } catch (RemoteException e) {
            handleExpcetion(e);
        }
    }
    return null;
}
 

/**
 * Gets the content URI builder for a specified type.
 *
 * Supported types include QUERY_PATH_DICT_INFO, which takes the locale as
 * the extraPath argument, and QUERY_PATH_DATAFILE, which needs a wordlist ID
 * as the extraPath argument.
 *
 * @param clientId the clientId to use
 * @param contentProviderClient the instance of content provider client
 * @param queryPathType the path element encoding the type
 * @param extraPath optional extra argument for this type (typically word list id)
 * @return a builder that can build the URI for the best supported protocol version
 * @throws RemoteException if the client can't be contacted
 */
private static Uri.Builder getContentUriBuilderForType(final String clientId,
        final ContentProviderClient contentProviderClient, final String queryPathType,
        final String extraPath) throws RemoteException {
    // Check whether protocol v2 is supported by building a v2 URI and calling getType()
    // on it. If this returns null, v2 is not supported.
    final Uri.Builder uriV2Builder = getProviderUriBuilder(clientId);
    uriV2Builder.appendPath(queryPathType);
    uriV2Builder.appendPath(extraPath);
    uriV2Builder.appendQueryParameter(QUERY_PARAMETER_PROTOCOL,
            QUERY_PARAMETER_PROTOCOL_VALUE);
    if (null != contentProviderClient.getType(uriV2Builder.build())) return uriV2Builder;
    // Protocol v2 is not supported, so create and return the protocol v1 uri.
    return getProviderUriBuilder(extraPath);
}