The document viewer can be used by third party applications. These applications can launch the document viewer application directly, and pass in a document or image to view. In order to launch a document the application passes the location of the file they wish to open. This document must be saved locally on the device
Applications broadcast Intent.ACTION_VIEW with the file’s URI and Mime type.
File document =
new File(Environment.getExternalStorageDirectory(), "document.pdf");
String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(
MimeTypeMap.getFileExtensionFromUrl(document.toURI().toString()));
if (mimeType != null) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setDataAndType(Uri.fromFile(document), mimeType);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
}
startActivity(intent)