android.content.Intent#resolveType ( )源码实例Demo

@TargetApi(ApiHelper.VERSION_CODES.HONEYCOMB)
public static int determineTypeBits(Context context, Intent intent) {
    int typeBits = 0;
    String type = intent.resolveType(context);

    if (MIME_TYPE_ALL.equals(type)) {
        typeBits = DataManager.INCLUDE_ALL;
    } else if (MIME_TYPE_IMAGE.equals(type) ||
            DIR_TYPE_IMAGE.equals(type)) {
        typeBits = DataManager.INCLUDE_IMAGE;
    } else if (MIME_TYPE_VIDEO.equals(type) ||
            DIR_TYPE_VIDEO.equals(type)) {
        typeBits = DataManager.INCLUDE_VIDEO;
    } else {
        typeBits = DataManager.INCLUDE_ALL;
    }

    if (ApiHelper.HAS_INTENT_EXTRA_LOCAL_ONLY) {
        if (intent.getBooleanExtra(Intent.EXTRA_LOCAL_ONLY, false)) {
            typeBits |= DataManager.INCLUDE_LOCAL_ONLY;
        }
    }

    return typeBits;
}
 

/**
 * Test whether this filter matches the given <var>intent</var>.
 *
 * @param intent The Intent to compare against.
 * @param resolve If true, the intent's type will be resolved by calling
 *                Intent.resolveType(); otherwise a simple match against
 *                Intent.type will be performed.
 * @param logTag Tag to use in debugging messages.
 *
 * @return Returns either a valid match constant (a combination of
 * {@link #MATCH_CATEGORY_MASK} and {@link #MATCH_ADJUSTMENT_MASK}),
 * or one of the error codes {@link #NO_MATCH_TYPE} if the type didn't match,
 * {@link #NO_MATCH_DATA} if the scheme/path didn't match,
 * {@link #NO_MATCH_ACTION if the action didn't match, or
 * {@link #NO_MATCH_CATEGORY} if one or more categories didn't match.
 *
 * @return How well the filter matches.  Negative if it doesn't match,
 *         zero or positive positive value if it does with a higher
 *         value representing a better match.
 *
 * @see #match(String, String, String, android.net.Uri , Set, String)
 */
public final int match(ContentResolver resolver, Intent intent,
                       boolean resolve, String logTag) {
    String type = resolve ? intent.resolveType(resolver) : intent.getType();
    return match(intent.getAction(), type, intent.getScheme(),
            intent.getData(), intent.getCategories());
}
 

/**
 * Test whether this filter matches the given <var>intent</var>.
 *
 * @param intent The Intent to compare against.
 * @param resolve If true, the intent's type will be resolved by calling
 *                Intent.resolveType(); otherwise a simple match against
 *                Intent.type will be performed.
 * @param logTag Tag to use in debugging messages.
 *
 * @return Returns either a valid match constant (a combination of
 * {@link #MATCH_CATEGORY_MASK} and {@link #MATCH_ADJUSTMENT_MASK}),
 * or one of the error codes {@link #NO_MATCH_TYPE} if the type didn't match,
 * {@link #NO_MATCH_DATA} if the scheme/path didn't match,
 * {@link #NO_MATCH_ACTION if the action didn't match, or
 * {@link #NO_MATCH_CATEGORY} if one or more categories didn't match.
 *
 * @return How well the filter matches.  Negative if it doesn't match,
 *         zero or positive positive value if it does with a higher
 *         value representing a better match.
 *
 * @see #match(String, String, String, android.net.Uri , Set, String)
 */
public final int match(ContentResolver resolver, Intent intent,
        boolean resolve, String logTag) {
    String type = resolve ? intent.resolveType(resolver) : intent.getType();
    return match(intent.getAction(), type, intent.getScheme(),
                 intent.getData(), intent.getCategories());
}