uaraven/pop500

Simple demo application that shows infinite 'Popular' stream from 500px.com.

Pop500

Simple demo application that shows infinite 'Popular' stream from 500px.com.

Okay, this was demo app for the interview for 500px. It didn't work out, so I decided to use it as a testbed for some of my pet projects.

Features

• "Inifinite" ListAdapter. Only 4 bytes are permanently stored in memory for each image. Given that 'Popular' stream is about 15000 photos, that means that only 60k of memory is used.
• Photo metadata is stored in LRU cache and loaded on demand.
• Images are stored in LRU cache. About 1/3 of application memory is allocated for images. That allows cache to hold about 120 pictures on Nexus 4. Images are stored in RGB_555 format to lower memory consumption.
• Both metadata and photos are prefetched for improved user expirience.

Limitations

Application only works on Android version 4.0 and higher. Tested only on Nexus 4 and Nexus 7 on Android 4.4. Error handling is simple - logging to ADB and toast messages. If you click on an image that is not yet loaded you'll get empty screen - there is no notification from downloader to image view activity.

Build

Maven 3.1.1 is required.

To build: mvn clean package android:apk

To run: mvn clean package android:run

Disclaimer

This application is in no way affiliated with 500px, Inc, except for the fact that it uses their awesome API.