DocumentsProvider.java 文件源码

/**
     * Implementation is provided by the parent class.
     */
    @Override
    public void attachInfo(Context context, ProviderInfo info) {
        mAuthority = info.authority;

        mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
        mMatcher.addURI(mAuthority, "root", MATCH_ROOTS);
        mMatcher.addURI(mAuthority, "root/*", MATCH_ROOT);
        mMatcher.addURI(mAuthority, "root/*/recent", MATCH_RECENT);
        mMatcher.addURI(mAuthority, "root/*/search", MATCH_SEARCH);
        mMatcher.addURI(mAuthority, "document/*", MATCH_DOCUMENT);
        mMatcher.addURI(mAuthority, "document/*/children", MATCH_CHILDREN);
        mMatcher.addURI(mAuthority, "tree/*/document/*", MATCH_DOCUMENT_TREE);
        mMatcher.addURI(mAuthority, "tree/*/document/*/children", MATCH_CHILDREN_TREE);

        // Sanity check our setup
        if (!info.exported) {
            throw new SecurityException("Provider must be exported");
        }
        if (!info.grantUriPermissions) {
            throw new SecurityException("Provider must grantUriPermissions");
        }
/*        if (!android.Manifest.permission.MANAGE_DOCUMENTS.equals(info.readPermission)
                || !android.Manifest.permission.MANAGE_DOCUMENTS.equals(info.writePermission)) {
            throw new SecurityException("Provider must be protected by MANAGE_DOCUMENTS");
        }
*/
        super.attachInfo(context, info);
    }