问题原因：
有时候发现，startService或者sendBroadCast会产生此异常：在没有合格用户的情况下调用系统进程中的方法。经查，原因是由于系统应用尝试拉起普通应用抛出此异常，可能是在Android 4.2 之后Android引入多用户支持，有些特殊权限启动服务或者发送广播会失败。
如何修改:
即把之前的启动服务，或者发送广播改为下面的调用方式即可：
public void startActivityAsUser(Intent intent, UserHandle user);
public void sendBroadcastAsUser(Intent intent, UserHandle user);
public ComponentName startServiceAsUser(Intent service, UserHandle user);
public boolean stopServiceAsUser(Intent service, UserHandle user);
UserHandle.ALL
UserHandle.CURRENT
UserHandle.CURRENT_OR_SELF
UserHandle.OWNER其中：
/** A user handle to indicate all users on the device */
//设备上所有用户均可接收到广播
// handle = -1
UserHandle.ALL
/** A user handle to indicate the current user of the device */
//设备上当前用户可接收到广播
// handle = -2
UserHandle.CURRENT
/** A user handle to indicate that we would like to send to the current
* user, but if this is calling from a user process then we will send it
* to the caller's user instead of failing wiht a security exception */
//handle = -3
//设备上当前用户或者该应用所属用户可接收到广播
UserHandle.CURRENT_OR_SELF
/** A user handle to indicate the primary/owner user of the device */
// handle = 0
//设备所有者可接收到广播
UserHandle.OWNER 例如：文章来源：https://www.toymoban.com/news/detail-521820.html
Intent intent = new Intent();
intent.setAction("com.android.server.light.brightness");
intent.putExtra("brightness", brightness);
//send broadcast
// mContext.sendBroadcast(intent); --舍弃
// mContext.sendBroadcastAsUser(intent, UserHandle.ALL);如果调用不到，不妨看看源码修改：文章来源地址https://www.toymoban.com/news/detail-521820.html
context.sendBroadcastAsUser(intent, UserHandle.getUserHandleForUid(-1));
Parcel parcel = Parcel.obtain();
parcel.writeInt(-1);
context.sendBroadcastAsUser(null, new UserHandle(parcel));到了这里，关于Android代码异常Calling a method in the system process without a qualified user的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！
