Fastest Way To Load And Display A Jpeg On A Surfaceview?

This is a bit of a followup to my last question: Canvas is drawing too slowly Now that I can draw images more quickly, the problem I am faced with is that the actual loading of the

Solution 1:

I ended up doing this quite a bit differently than I had originally envisioned. There was quite a bit to it, but here's the gist of how I achieved my goal:

1. All images are stored on SD card and written to one file (each image takes up X bytes in the file)
2. Use native code to read from and write to the image file
3. When requesting an image, I pass the index of the image in the list and a bitmap object (RGB_565) to the native code using a JNI wrapper
4. The native code locks the bitmap surface, writes pixel data (as a uint8_t**) directly to the bitmap, then unlocks it
5. The image is rendered to the screen

By doing it this way, I only needed to store one image in memory at a time, and I was able to bypass garbage collection (since the bitmap was only created once and then repopulated natively). I hope someone else might find this strategy useful.

Solution 2:

Guess you already tried all methods in this tutorial http://www.higherpass.com/Android/Tutorials/Working-With-Images-In-Android/2/ and chosen the fastest. Maybe tweaking resizing can decrease loading time.

Best of all would of course be if you didn't have to resize the images at all. If you have full control of the images maybe you could try to pack them as sprites, see article http://www.droidnova.com/2d-sprite-animation-in-android,471.html