Here's how you can set the default apps on Google's Nexus 7 tablet.
1. Select the file you want to open with an app.
2. You will be prompted to select an app to open the file.
3. Select your app for the file, then tap on Always.
Now all of those kinds of files will default to opening in your preferred app on the Nexus 7 tablet. This will save you time later on as you won't have to select an app each time you open that particular kind of file on the Nexus 7.
Read more: CNet