(The source code of the Java Android video player is very rich in comments in the code, which is a valuable reference program for learning. A relatively complete video online player realizes playing, pausing, progress bar display, and full screen playing. You can simply repair according to your own needs and then join your own project. Through this Android source code, you will understand the production of buttons, drawing container objects, about displaying videos on the screen, using progress bar controls, insisting on screen highlighting, not locking the screen, binding related things, creating and updating progress bar objects, setting non clickable when just opening the runtime, setting monitoring events, defining playback threads, and explaining that you have stopped halfway (the activity called the pass method, not the user clicked the stop button), Jump to the stop position to start playing. Click the screen to switch the display of the control. The display should be hidden or hidden to display. This document includes the following annexes:)