相关疑难解决方法(0)

public void openDocumentWithInstalledApp(String filename) {
String mimetype = "";
url = url+ filename;
if (!url.startsWith("http://") && !url.startsWith("https://")) {
url = "http://" + url;
}
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(browserIntent);

/*what should I do?*/

mimetype = "application/pdf";
File file = new File("/mnt/sdcard/Download/" + filename);
Intent intent1 = new Intent(Intent.ACTION_VIEW);
intent1.setDataAndType(Uri.fromFile(file), mimetype);
intent1.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent1);
}

首先,我尝试从url下载pdf.其次,我尝试阅读上面的pdf下载.但它可能无法下载完成.如果我想等待pdf下载完成.我该怎么办？