使用0或BIND_AUTO_CREATE作为bindService的标志 [英] Use 0 or BIND_AUTO_CREATE for bindService's flag

问题描述

通过引用我是否知道，什么时候应该将0用于 flags ，何时应该将 BIND_AUTO_CREATE 用于 flags ?该文档没有解释标志0的含义.

May I know, when should we use 0 for flags, and when should we should we use BIND_AUTO_CREATE for flags? The documentation doesn't explain what is the meaning of 0 for flags.

// Start auto complete service.
autoCompleteServiceIntent = new Intent(AutoCompleteService.class.getName()); 
startService(autoCompleteServiceIntent);
bindService(autoCompleteServiceIntent, serviceConnection, 0);

将 BIND_AUTO_CREATE 用作 flags

的示例

Example for using BIND_AUTO_CREATE as flags

mContext.bindService(new Intent("com.android.vending.billing.InAppBillingService.BIND"),
                             mServiceConn, Context.BIND_AUTO_CREATE);

推荐答案

对于方法 bindService(Intent，ServiceConnection，flag)，如果使用了 flag = Context.BIND_AUTO_CREATE 将绑定 service 并启动该服务，但是如果使用"0" ，则该方法将返回true，并且不会启动服务，直到进行诸如 startService(Intent)之类的调用以启动 service ."0" 的普遍用法之一是，如果有活动连接到本地服务(如果该服务正在运行)，则可以启动该服务.

For method bindService(Intent, ServiceConnection, flag) if flag = Context.BIND_AUTO_CREATE is used it will bind the service and start the service, but if "0" is used, method will return true and will not start service until a call like startService(Intent) is made to start the service. One of the common use of "0" is in the case where an activity to connect to a local service if that service is running, otherwise you can start the service.

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