Open file with default application using Intents

IntentHelper.java

/**
 * Send email.
 *
 * @param context the context
 * @param email the email
 * @param subject the subject
 * @param text the text
 */
public void sendEmail(Context context, String email, String subject,
		String text) {
	final Intent emailIntent = new Intent(
			android.content.Intent.ACTION_SEND);
	emailIntent.setType("plain/text");
	emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL,
			new String[] { email });
	emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
	emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, text);
	context.startActivity(Intent.createChooser(emailIntent, "Send mail..."));
}

/**
 * Dial.
 *
 * @param context the context
 * @param number the number
 */
public void dial(Context context, String number) {
	Uri dialUri = Uri.parse("tel:" + number);
	Intent dialIntent = new Intent(Intent.ACTION_DIAL, dialUri);
	context.startActivity(dialIntent);
}

/**
 * Call.
 *
 * @param context the context
 * @param number the number
 */
public void call(Context context, String number) {
	Uri callUri = Uri.parse("tel:" + number);
	Intent callIntent = new Intent(Intent.ACTION_CALL, callUri);
	context.startActivity(callIntent);
}

OpenIntents.java

/**
 * Open file
 * 
 * @param uri path to file
 */
public void openFile(Uri uri) {
     Intent intent = new Intent();
     intent.setAction(Intent.ACTION_VIEW);
     if (url.toString().contains(".doc") || url.toString().contains(".docx")) {
          // Word document
          intent.setDataAndType(uri, "application/msword");
     } else if (url.toString().contains(".pdf")) {
          // PDF file
          intent.setDataAndType(uri, "application/pdf");
     } else if (url.toString().contains(".ppt") || url.toString().contains(".pptx")) {
          // Powerpoint file
          intent.setDataAndType(uri, "application/vnd.ms-powerpoint");
     } else if (url.toString().contains(".xls") || url.toString().contains(".xlsx")) {
          // Excel file
          intent.setDataAndType(uri, "application/vnd.ms-excel");
     } else if (url.toString().contains(".zip") || url.toString().contains(".rar")) {
          // WAV audio file
          intent.setDataAndType(uri, "application/x-wav");
     } else if (url.toString().contains(".rtf")) {
          // RTF file
          intent.setDataAndType(uri, "application/rtf");
     } else if (url.toString().contains(".wav") || url.toString().contains(".mp3")) {
          // WAV audio file
          intent.setDataAndType(uri, "audio/x-wav");
     } else if (url.toString().contains(".gif")) {
          // GIF file
          intent.setDataAndType(uri, "image/gif");
     } else if (url.toString().contains(".jpg") || url.toString().contains(".jpeg") || url.toString().contains(".png")) {
          // JPG file
          intent.setDataAndType(uri, "image/jpeg");
     } else if (url.toString().contains(".txt")) {
          // Text file
          intent.setDataAndType(uri, "text/plain");
     } else if (url.toString().contains(".3gp") || url.toString().contains(".mpg") || url.toString().contains(".mpeg") || url.toString().contains(".mpe") || url.toString().contains(".mp4") || url.toString().contains(".avi")) {
          // Video files
          intent.setDataAndType(uri, "video/*");
     } else {
          // Other files
          intent.setDataAndType(uri, "*/*");
     }
     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
     startActivity(intent);
}