Android N 插件 在获取PackageInfo.activies = null 7.0之前的版本都无此问题

try {
PackageInfo packageInfo = pm.getPackageInfo(context.getPackageName(), PackageManager.GET_ACTIVITIES);
if(packageInfo.activities==null){
此处为空，找了很久始终没有解决方案
return null;
}
for (ActivityInfo ai : packageInfo.activities) {
if ((name+hideName).equals(ai.nonLocalizedLabel)) {
activityInfo = ai;
break;
}
}
} catch (Exception e) {
e.printStackTrace();
}