Card Camera App

Releasing our newest android app https://play.google.com/store/apps/details?id=com.ramentech.cardcamera.free with this app you could create cards (currently magic cards) and share to your friends.

Giving away free nexus 7

Over at uPick.in we are giving away a free Nexus 7 :) or an Ipod Touch if like IOS. We need to reach 10000 votes for us to get the item shipped.
Go vote and share this link Free Nexus 7/IPod Touch
Thanks everyone

Introducing uPick.In

As you may have figured out i havent post in a while, have been so busy with work and into a new venture after work.
Here is the part i introduce uPick.In while its not Android related (it will in the future :]) It would be what i would be busy with in the following months. uPick.In is our vision of what a poll/voting site should be in our day and age where we include sentence based poll (create a poll in sentence style) and a gallery poll (poll with external links) and more to come in the future :]

Here is an example of how to create a poll

If you have any suggestions or any comments with it, just drop it over at the comment page here or create a poll in http://www.upick.in/upick
Thanks everyone

Google IO 2012

Within 2 days, Google IO would be live. Here is widget that would stream the developer conference.

Center Tab Item in TabWidget and HorizontalScrollView in Android

So you have a TabWidget within HorizontalScrollView, and you want to center the selectedTab (either dynamically or if you have ViewPager on page scroll). On your TabHost, you'll have something like this.

<HorizontalScrollView
        android:id="@+id/horizontalScrollView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:fillViewport="true"
        android:scrollbars="none"
        android:layout_weight="0"
        >

    <TabWidget
            android:id="@android:id/tabs"
            android:orientation="horizontal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"

            />
</HorizontalScrollView>

On your activity/fragment

public void centerTabItem(int position) {
    tabHost.setCurrentTab(position);
    final TabWidget tabWidget = tabHost.getTabWidget();
    final int screenWidth = getWindowManager().getDefaultDisplay().getWidth();
    final int leftX = tabWidget.getChildAt(position).getLeft();
    int newX = 0;

    newX = leftX + (tabWidget.getChildAt(position).getWidth() / 2) - (screenWidth / 2);
    if (newX < 0) {
        newX = 0;
    }
    horizontalScrollView.scrollTo(newX, 0);
}

Say you have a viewPager, then you could use it like

public void onPageSelected(int position) {
    centerTabItem(position);
}

Explanation
final int screenWidth = getWindowManager().getDefaultDisplay().getWidth();
Get the phone's width, we need to to know where the center is (by dividing it by half)

final int leftX = tabWidget.getChildAt(position).getLeft();
Get the x position of the item we want to center, this is relative to its parent (horizontalScrollView)

newX = leftX + (tabWidget.getChildAt(position).getWidth() / 2) - (screenWidth / 2);
The center would be calculated based on horizontalScrollView.scrollTo, so the left x plus half the item width, would be negative value as the new x would scroll to the left of the parent, then if you minus (or plus since its going to the left plane/negative) to the half width value of the device then you will arrive in the center.

horizontalScrollView.scrollTo(newX, 0);
Scroll the tabWidget to the newX, y stays at 0

Hope this helps :)

Welcome 2012

Belated happy new year, advance happy chinese new year. Last year, i was so preoccupied with a lot of stuff that i only blogged 6 times and only 1 of which is an android tutorial, this year it would definitely be more than 1 lol. And there are lots of great tutorial out there already and sites like Stackoverlow is great place to ask questions. Towards the end of the year last year, i created Generate Android Code to do some code generator, you guys check it out once in awhile.
To start this year, i cleaned up this blog's links and image links that linked to the wordpress version of this site :)