How to open file with any exetension in Android?

Question

I have an app in which user can upload file with any exetention(.png,.mp3,.txt,.pdf

Answer 1

Pointing to the first part of your question:

try
{
  Intent intent = new Intent(Intent.ACTION_VIEW, uri);
  startActivity(intent);
}
catch (ActivityNotFoundException e)
{
  //tel the user to install viewer to perform this action
}

There's no need to specify the type. It will get it from the data URI.

Answer 2

The following code will work for every file type:

try {
    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setDataAndType(Uri.fromFile(file), fileMimeType);
    startActivity(intent);
} catch (ActivityNotFoundException e) {
    // no Activity to handle this kind of files
}

Of course, there should be an Activity in the system that knows how to handle the file of a certain type. Hope this helps.

Answer 3

public void openFile() {
    try {
        File file = new File(G.DIR_APP + fileName);
        fileExtension = fileName.substring(fileName.lastIndexOf("."));
        Uri path = Uri.fromFile(file);
        Intent fileIntent = new Intent(Intent.ACTION_VIEW);
        fileIntent.setDataAndType(path, "application/" + fileExtension);
        startActivity(fileIntent);
    } catch (ActivityNotFoundException e) {
        Toast.makeText(G.currentActivity, "Cant Find Your File", Toast.LENGTH_LONG).show();
    }

}