Java 文档文件需要在文件名附近显示文档徽标，如whatsapp

我试图在我的聊天应用程序（如whatsapp）中与其他人共享文档文件。这里我想在文件名附近显示文件类型徽标，我们共享的文件类型。如果是pdf文件pdf徽标，如果是doc文件，则需要在文件名附近显示doc徽标。我该怎么做呢。任何默认模块都存在

我遇到了这个问题，以下是我的解决方案：

从文件URI检测MIME类型

在应用程序中定义支持的MIME类型

编写一个从MIME类型获取图标徽标资源的方法

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希望这对你有帮助

没有默认模块，将应用程序支持的所有文件资源捆绑在drawable中，并使用扩展名进行检查，然后将图标相对放置

public static String getMimeType(Context context, Uri uri) {
        String mimeType;
        if (uri.getScheme().equals(ContentResolver.SCHEME_CONTENT)) {
            ContentResolver cr = context.getApplicationContext().getContentResolver();
            mimeType = cr.getType(uri);
        } else {
            String fileExtension = MimeTypeMap.getFileExtensionFromUrl(uri
                    .toString());
            mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(
                    fileExtension.toLowerCase());
        }
        return mimeType;
}

public final class MIMEType {
    public static final String IMAGE = "image/*";
    public static final String TEXT_PLAIN = "text/plain";
    public static final String APPLICATION_PDF = "application/pdf";
    public static final String APPLICATION_FLASH = "application/x-shockwave-flash";
    public static final String APPLICATION_OCTET_STREAM = "application/octet-stream";
    public static final String APPLICATION_DOC = "application/msword";
    public static final String APPLICATION_DOCX = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
    public static final String APPLICATION_XLS = "application/vnd.ms-excel";
    public static final String APPLICATION_XLSX = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
    public static final String APPLICATION_PPT = "application/vnd.ms-powerpoint";
    public static final String APPLICATION_PPTX = "application/vnd.openxmlformats-officedocument.presentationml.presentation";
}

private int getIconResourceBasedOnMimeType(String mimeType) {
    switch (mimeType) {
        case MIMEType.TEXT_PLAIN:
            return R.drawable.ic_text_blue;
        case MIMEType.APPLICATION_PDF:
            return R.drawable.ic_pdf_blue;
        case MIMEType.APPLICATION_FLASH:
            return R.drawable.ic_swf_blue;
        case MIMEType.APPLICATION_DOC:
        case MIMEType.APPLICATION_DOCX:
            return R.drawable.ic_word_blue;
        case MIMEType.APPLICATION_XLS:
        case MIMEType.APPLICATION_XLSX:
            return R.drawable.ic_excel_blue;
        case MIMEType.APPLICATION_PPT:
        case MIMEType.APPLICATION_PPTX:
            return R.drawable.ic_pp_blue;
        case MIMEType.APPLICATION_OCTET_STREAM:
        default:
            return R.drawable.ic_binary_blue;
    }
}