#android-fragments

How-to: Best practice for instantiating a new Android Fragment #fix #it #programming

Best practice for instantiating a new Android Fragment

I am not sure how sensible this question is so I apologies up front however I know from a developer meet up tonight that I am not alone on this one.

So, I have seen two general practices to instantiate a new Fragment in an application:

Fragment newFragment = new MyFragment();

and

Fragment newFragment = MyFragment.newInstance();

The second…

Fix: How to determine when Fragment becomes visible in ViewPager #computers #solution #fix

How to determine when Fragment becomes visible in ViewPager

Problem: Fragment onResume() in ViewPager is fired before the fragment becomes actually visible.

For example, I have 2 fragments with ViewPager and FragmentPagerAdapter. The second fragment is only available for authorized users and I need to ask the user to log in when the fragment becomes visible (using an alert dialog).

BUT the ViewP…

How to: How to set the title of DialogFragment?

How to set the title of DialogFragment?

This should be a simple task, but for some reason I can find a way to set the title of a DialogFragment. (I am setting the dialog contents using “onCreateView” overload).

The default style leaves a place for the title, but I can’t find any method on the DialogFragment class to set it.

The title is somehow magically set when the “onCreateDialog” method is…

How to: Complete Working Sample of the Gmail Three-Fragment Animation Scenario?

Complete Working Sample of the Gmail Three-Fragment Animation Scenario?

TL;DR: I am looking for a complete working sample of what I’ll refer to as “the Gmail three-fragment animation” scenario. Specifically, we want to start with two fragments, like this:

Upon some UI event (e.g., tapping on something in Fragment B), we want:

Fragment A to slide off the screen to the left

Fragment B to slide to…

Fixed onActivityResult not being called in Fragment #dev #it #asnwer

onActivityResult not being called in Fragment

EDIT

The activity hosting this fragment has its onActivityResult called when the camera activity returns

My fragment starts an activity for result with the intent sent for the camera to take a picture. The picture application loads fine, takes a picture, and returns. The onActivityResulthowever is never hit. I’ve set break points but nothing is…

How to: Do fragments really need an empty constructor?

Do fragments really need an empty constructor?

I have a fragment with a Constructor with multiple arguments, everything worked fine during testphase but now after about 300 users downloaded the app, i have ONE occurence of that exception:

android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment make sure class name exists, is public, and has an empty constructor…

Fixed How to handle button clicks using the xml onClick within Fragments #dev #it #asnwer

How to handle button clicks using the xml onClick within Fragments

Pre-Honeycomb, each Activity was registered to handle button clicks via the onClick tag in a Layout’s XML.

android:onClick="myClickMethod"

Within that method you can use view.getId() and a switch statement to do the button logic.

With the introduction of Honeycomb I’m breaking these Activities into Fragments which can be reused…

How to: Fragments within Fragments

Fragments within Fragments

I’m wondering if this is actually a bug in the Android API:

I have a setup like so:

┌┬-┐ | | | | 1 | 2 | | |┌-┐| | || || | || 3 || └┴┴-┴┘

Is a menu which loads fragment #2 (A search screen) in the right pane.

Is a search screen which contains fragment #3, which is a result list.

The result list is used in several places (including as a functioning high level fragment…