Android获取当前进程名

Android获取当前进程名，俩种方式，第一种通过读取 /proc/self/cmdline 文件的内容，代码如下：

    /**     * 返回当前的进程名     */    public static String getCurrentProcessName() {        FileInputStream in = null;        try {            String fn = "/proc/self/cmdline";            in = new FileInputStream(fn);            byte[] buffer = new byte[256];            int len = 0;            int b;            while ((b = in.read()) > 0 && len < buffer.length) {                buffer[len++] = (byte) b;            }            if (len > 0) {                String s = new String(buffer, 0, len, "UTF-8");                return s;            }        } catch (Throwable e) {            e.printStackTrace();        } finally {            if (in != null){                try {                    in.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }        return null;    }

第二种，通过反射调用ActivityThread中的 getProcessName() 方法拿到进程名，代码如下

    /**     * 返回当前的进程名     */    public static String getCurrentProcessName()throws Exception {        //1. 通过ActivityThread中的currentActivityThread()方法得到ActivityThread的实例对象        Class<?> activityThreadClass = Class.forName("android.app.ActivityThread");        Method method = activityThreadClass.getDeclaredMethod("currentActivityThread", activityThreadClass);        Object activityThread = method.invoke(null);        //2. 通过activityThread的getProcessName() 方法获取进程名        Method getProcessNameMethod = activityThreadClass.getDeclaredMethod("getProcessName", activityThreadClass);        Object processName = getProcessNameMethod.invoke(activityThread);        return processName.toString();    }

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