| Now days, people become more and more familiar with smart phones. The smart phones have merged into our life, and become part of it. As one of the two main stream operation system on smart phones, Android has been deployed on more and more phones, and has developed its own environment. Android apps are easy to develop and have a wide range of deploying machines. Many developers are focused on it, and it is a good choice to start with Android development as the entrance of studying smart phone app development.As now people spend more and more time on their phones, they have less time do sports, which make people weaker and cause some health problems. I want to find a joint point to join them together as someone who likes using phones and doing sports. They see many apps on smart phones about walking running and some other sports like that. But there is seldom any apps on heap sports like boxing or something like that, I want to develop a app to help do punch exercise which will help to exercise more efficiently.This article measures the acceleration by Android linear acceleration sensor. The acceleration data are calculated to judge the punch amount and the max acceleration? This software records the total amounts of the punching, the history max acceleration, and shows the data of the last 10 punching, including time total acceleration,acceleration on X, Y and Z pole, and the degree between initial punching direction and real time direction.The real acceleration data was collected by the linear acceleration sensor on the phone with minimum interval of about 8 milliseconds. And the curve chart was drawn to show the conditions of single punching and continues punching.The detection of punching and shaking hands was also discussed in this article.The accumulated error is tested to be less than 10 percent; the software has the automatic detection of single punching and continues punching. This function is seldom found in the software in the market, which fulfill the uses'need. |
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