Android: Open saved file in default app from my app

Question

First off, sorry if this has been asked but I cannot find it. I am downloading documents in my app from a remote resource. Once the document is downloaded, I want to open it for the user. What I want to know is how do I check if they have an application to handle Pdf or Tiff and launch it in the default application for them?

Thank you.

edit

here is part of the solution:

Intent viewDoc = new Intent(Intent.ACTION_VIEW);
viewDoc.setDataAndType(
    Uri.fromFile(getFileStreamPath("test.pdf")), 
    "application/pdf");

PackageManager pm = getPackageManager();
List<ResolveInfo> apps = 
    pm.queryIntentActivities(viewDoc, PackageManager.MATCH_DEFAULT_ONLY);

if (apps.size() > 0)
    startActivity(viewDoc);

Answer 1

The following code might help you

code for the file
write this code to get the url of file in main function

File myFile = new File("your any type of file url");
FileOpen.openFile(mContext, myFile);

Code to open default application present in the handset create another class

public class FileOpen {
    public static void openFile(Context context, File url) throws IOException {
        // Create URI
        File file=url;
        Uri uri = Uri.fromFile(file);

        Intent intent = new Intent(Intent.ACTION_VIEW);
        // Check what kind of file you are trying to open, by comparing the url with extensions.
        // When the if condition is matched, plugin sets the correct intent (mime) type, 
        // so Android knew what application to use to open the file
        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 {
            //if you want you can also define the intent type for any other file

            //additionally use else clause below, to manage other unknown extensions
            //in this case, Android will show all applications installed on the device
            //so you can choose which application to use
            intent.setDataAndType(uri, "*/*");
        }

        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
        context.startActivity(intent);
    }
}
also u can write this if condition
*** if(url.getPath().endsWith(".jpg") || url.getPath().endsWith(".jpeg")|| url.getPath().endsWith(".png")***
{
          intent.setDataAndType(uri,"image/*");
}*

Answer 2

Step #1: Create an ACTION_VIEW Intent, using setDataAndType() to provide a Uri to your downloaded file (e.g., Uri.fromFile()) and the MIME type of the content (e.g., application/pdf).

From there, you have two options:

Step #2a: Use PackageManager and queryIntentActivities() with that Intent. If it returns a zero-length list, you know there are no candidates, and therefore can disable any buttons, menu choices, or whatever that would lead to calling startActivity() on that Intent.

or

Step #2b: Just call startActivity() when the user wants to view it, and catch the exception that occurs when there are no supported apps installed. This is simpler than #2a above, but not quite as user-friendly.