Android意向基于文件类型

intent.setType(\"video/mpeg\");

Intent intent= new Intent();
intent.setAction(Intent.ACTION_VIEW);

File file = new File(filePath);

MimeTypeMap mime = MimeTypeMap.getSingleton();
String ext = file.getName().substring(file.getName().indexOf(\".\")+1);
String type = mime.getMimeTypeFromExtension(ext);

intent.setDataAndType(Uri.fromFile(file), type);

//differentiate file type
    String filename = o.getName();
    String filenameArray[] = filename.split(\"\\\\.\");
    String extension = filenameArray[filenameArray.length-1];

    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);

    if (extension.contains(\"png\") || extension.contains(\"gif\") || extension.contains(\"jpg\") 
            || extension.contains(\"jpeg\") || extension.contains(\"bmp\"))
    {
        intent.setDataAndType(Uri.parse(\"file://\" + o.getPath()), \"image/*\");
    }
    if (extension.contains(\"txt\") || extension.contains(\"csv\") || extension.contains(\"xml\"))
    {
        intent.setDataAndType(Uri.parse(\"file://\" + o.getPath()), \"text/*\");
    }
    if (extension.contains(\"pdf\"))
    {
        intent.setDataAndType(Uri.parse(\"file://\" + o.getPath()), \"application/pdf\");
    }
    if (extension.contains(\"doc\") || extension.contains(\"docx\"))
    {
        intent.setDataAndType(Uri.parse(\"file://\" + o.getPath()), \"application/msword\");
    }
    if (extension.contains(\"mp3\") || extension.contains(\"wav\") || extension.contains(\"oog\") 
            || extension.contains(\"mid\") || extension.contains(\"amr\") || extension.contains(\"midi\"))
    {
        intent.setDataAndType(Uri.parse(\"file://\" + o.getPath()), \"audio/*\");
    }
    if (extension.contains(\"mpeg\") || extension.contains(\"3gp\"))
    {
        intent.setDataAndType(Uri.parse(\"file://\" + o.getPath()), \"video/*\");
    }