Integrate PayPal Digital Goods Express Checkout Into Website

On April 27, 2013, in Make Money Online, by James

Once Apple introduce the in-app-purchase, purchase digital goods inside app becomes one acceptable way for users accessing videos, audios, eBooks, virtual goods easily. Therefore, in-website-purchase should be the correct way for user to purchase digital goods inside Website. PayPal released a new payment way which enable us to purchase digital goods smoothly in website.

The first time I was using the Paypal is 4 years ago. At that time, my friend and I want to create a social site using PHP and integrate the Paypal as our main payment gateway. Then, in the second time, I implemented the Paypal in my CMS site, which is an simple donation button. I think it is time to use Paypal again, because it provide a new payment way, PayPal for Digital Goods.
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Tagged with: make money from websiteprice 

Decide Android App Screen Size

On April 11, 2014, in Android, Android Phone and Tablet, by James

Different from iPhone and iPad, live wallpaper is one of the personalization features to customize Android phones and Android tablets. A live wallpaper on Android is used as background on home screen which animates and changes basing on user actions or over time in the day. As Android developers and designers, we can implement our own live wallpaper and monetize it as an Android applications. Hence, I decide to create a series of tutorials to show how to design a live wallpaper for Android device and monetize it by published in Google Play Store.

In this series of tutorials, I will divide my tutorials into 4 parts:

  • Android Animated Live WallPaper Tutorials 1: Decide Android App Screen Size
  • Android Animated Live WallPaper Tutorials 2: Make Android WallPaper Service
  • Android Animated Live WallPaper Tutorials 3: Make Interactive Android Live Wallpaper
  • Android Animated Live WallPaper Tutorials 4: Monetize Android Live Wallpaper in Google Play Store

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Add AdMob with Google Play Service

On April 9, 2014, in Android, Make Money Online, by James

The Admob service is integrated in Google Play. After August 1, 2014, Google Play will stop accepting new or updated apps which are using the standalone AdMob SDK. Adding AdMob in android app seems to be easy. But it still takes me half of the day to run the app on my android phone successfully. In this Android example, I will show you how to integrate AdMob from Google Play services in your android apps.

Try Example Android App

You can download and install this android app by click the following link, or scan the following QR code to download and install on your android phone simply. If you feel it is helpful, please support me by clicking the banner inside the app.

Download and Run AdMob Example App on Your Android Phone
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Tagged with: Admob 

10 Free Android Live Wallpapers

On April 4, 2014, in Android, by James

It is all well and good having a stationary background on our Android device. However, Android can do so much better than this. We have the ability to make that home screen come alive with animated wallpapers. They look absolutely stunning! So I decide to create my own Android live wallpaper app and share all example source code after I finish it. I may write some tutorials about how to create Android Live Wallpaper apps. Before that, I have found several free Android Live Wallpaper apps out there at the moment. I want to share with you ten of my favorite.
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Tagged with: Android 

HTTP Header Fields Howto

On April 3, 2014, in Other Online Technology, by James

When we are browsing website, it always takes longer time to load the page in first time than that in second time. Sometimes it will take 5 seconds to download a file, but it may only take you 1 seconds for downloading the same file. It’s all because Browser cache and HTTP header fields. Cache mechanism is doing a good job to improve the HTTP service performance. By setting some cache fields in HTTP header, we can reduce the number of requests and save a lots of bandwidth as well. In the meantime, it will also improve the user experience with website by reducing the loading resource. Here is an common HTTP Response example:
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Browser and Website HTTP Cache

On April 1, 2014, in Other Online Technology, by James

Last-Modified and HTTP-IF-MODIFIED-SINCE is the most common cache mechanism between browsers and web server. Usually, when we access one static html page, web server will return us one 200 HTTP response with Last-Modified information. Our browsers will keep this information and send it as a value of HTTP-IF-MODIFIED-SINCE in the http request header when we try to access the same url next time.

In the server side, it will check the resource last modified date with HTTP-IF-MODIFIED-SINCE value. If they are the same, it will return 304 HTTP Response. Otherwise, it will return the latest resource by 200 HTTP Response with a new Last-Modified value. Here is an example.
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