How do I jump over the wide area in world 8-2?

I have no idea how your Android App handles the jump, but if you want to make it, here's a step-by-step of what you need to do.

1. Stand on the far edge (left) of the pipe.
2. Hold down your run button, and do not let go of it at any point in time
3. Begin running forward. If you are running, as you should be, you should run straight over the gap.
4. At the very edge of the gap, begin holding the jump button while continuously holding right.
5. At no point should you let go of this button. At no point should you let go of the run button. At no point should you stop moving right. You must hold all three buttons and not let go at any point,

The longer you hold both buttons, the further your jump will take you. By following these steps, especially the last one, you should be able to make this difficult jump. Do not worry about overshooting it. There's no danger there.

It looks as though youtube has a walkthrough.

It seems that if you get on that little platform just before the two column blocks you can jump (be sure to hold it down the entire jump) and then you'll be able to make it and complete the level.

Also, Mario is one of those, If at first you don't succeed games. Remember that you can save and load at a whim nowadays.