android 开发获取应用uid 唯一标识

ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
ApplicationInfo appinfo = getApplicationInfo();
List<ActivityManager.RunningAppProcessInfo> run = am.getRunningAppProcesses();
for (ActivityManager.RunningAppProcessInfo runningProcess : run) {
    if ((runningProcess.processName != null) && runningProcess.processName.equals(appinfo.processName)) {
        Log.e("===========", String.valueOf(runningProcess.uid));
        break;
    }
}