各样式文件打开

    // 打开
    private void OpenFile() {

        m_pDialog.cancel();

        String end = fileName.substring(fileName.lastIndexOf(".") + 1,
                fileName.length()).toLowerCase();

        Intent intent = new Intent(Intent.ACTION_VIEW);

        if (end.equals("jpg") || end.equals("gif") || end.equals("png")
                || end.equals("jpeg") || end.equals("bmp")) {

            intent.setDataAndType(
                    Uri.fromFile(new File(Environment
                            .getExternalStorageDirectory() + "/wzh/",
                            fileName)), "image/*");

        } else if (end.equals("doc") || end.equals("docx")) {

            intent.setDataAndType(
                    Uri.fromFile(new File(Environment
                            .getExternalStorageDirectory() + "/wzh/",
                            fileName)), "application/msword");

        } else if (end.equals("xls") || end.equals("xlsx")) {

            intent.setDataAndType(
                    Uri.fromFile(new File(Environment
                            .getExternalStorageDirectory() + "/wzh/",
                            fileName)), "application/vnd.ms-excel");

        } else if (end.equals("ppt") || end.equals("pptx")) {

            intent.setDataAndType(
                    Uri.fromFile(new File(Environment
                            .getExternalStorageDirectory() + "/wzh/",
                            fileName)), "application/vnd.ms-powerpoint");

        } else if (end.equals("chm")) {

            intent.setDataAndType(
                    Uri.fromFile(new File(Environment
                            .getExternalStorageDirectory() + "/wzh/",
                            fileName)), "application/x-chm");

        } else if (end.equals("tif")) {

            intent.setDataAndType(
                    Uri.fromFile(new File(Environment
                            .getExternalStorageDirectory() + "/wzh/",
                            fileName)), "image/tiff");

        } else if (end.equals("txt")) {

            intent.setDataAndType(
                    Uri.fromFile(new File(Environment
                            .getExternalStorageDirectory() + "/wzh/",
                            fileName)), "text/plain");

        } else if (end.equals("pdf")) {

            intent.setDataAndType(
                    Uri.fromFile(new File(Environment
                            .getExternalStorageDirectory() + "/wzh/",
                            fileName)), "application/pdf");

        } else if (end.equals("zip")) {

            intent.setDataAndType(
                    Uri.fromFile(new File(Environment
                            .getExternalStorageDirectory() + "/wzh/",
                            fileName)), "application/zip");
        } else {
            intent.setDataAndType(
                    Uri.fromFile(new File(Environment
                            .getExternalStorageDirectory() + "/wzh/",
                            fileName)), "*/*");
        }

        startActivity(intent);
    }