[Android应用]Android代码对节点进行读与写

需求：

在做Android开发板相关的开发需求的时候，我们有的时候需要去到Android系统对节点进行读与写；

调试例如
 

echo 1 > /sys/class/misc/gpio
cat /sys/class/misc/gpio

方法：

private int writeSysfs(String path, String value) {try {FileWriter command = new FileWriter(path);command.write(value);command.close();} catch (Exception e) {e.printStackTrace();return -1;}return 0;
}private String readSysfs(String path) {String line = null;File file = new File(path);if(file.exists()) {try {InputStreamReader reader = new InputStreamReader(new FileInputStream(file));BufferedReader br = new BufferedReader(reader);line = br.readLine();} catch (Exception e) {return null;}} else {return null;}return line;
}

调用方法： 

writeSysfs("/sys/class/misc/gpio", index);
status = readSysfs("/sys/class/misc/gpio");