一个简单的androi程序，读取指定目录下心电数据文件（txt格式），并动态显示心电波形-Androi a simple program that reads the ECG data files in the specified directory (txt format), and dynamic display ECG waveform

读取txt文本心电图数据，动态的绘制心电图波形(Read TXT text ECG data and draw ECG waveform dynamically)