I am Japanese, a old man and cannot use English well.
I am writing this using the translation machine.
I hope you understand my story.
The other day, I made an app.
Initially, each screen was setted to the left, and each component was placed in the center of a layout component.
When checking out that app by wifi connection with the real device, each screen appears all of the screen contents.
However, when importing the downloading apk file on the device, some screens didn't display all of then.
Then, I setted all screen to the center.
However, on the real device, some screens were displayed as slightly to the right.
I wonder if it happened for using a lot of parts and layout components on one screen.