org.cef.handler

接口 CefAppHandler

所有已知实现类:

CefApp, CefAppHandlerAdapter

public interface CefAppHandler

Implement this interface to provide handler implementations. Methods will be called by the process and/or thread indicated. (实现此接口以提供处理程序实现。方法将由指示的进程和/或线程调用。)

方法概要

限定符和类型	方法和说明
CefPrintHandler	getPrintHandler() Return the handler for printing on Linux. (返回处理程序以在Linux上打印。)
void	onBeforeCommandLineProcessing(java.lang.String process_type, CefCommandLine command_line) Provides an opportunity to view and/or modify command-line arguments before processing by CEF and Chromium. (提供机会在CEF和Chromium处理之前查看和/或修改命令行参数。)
boolean	onBeforeTerminate() Provides an opportunity to hook into the native shutdown process. (提供了连接到本机关闭过程的机会。)
void	onContextInitialized() Called on the browser process UI thread immediately after the CEF context has been initialized. (CEF上下文初始化后立即在浏览器进程UI线程上调用。)
void	onRegisterCustomSchemes(CefSchemeRegistrar registrar) Provides an opportunity to register custom schemes. (提供注册自定义方案的机会。)
void	onScheduleMessagePumpWork(long delay_ms) Called from any thread when work has been scheduled for the browser process main (UI) thread. (在为浏览器进程主（UI）线程安排了工作之后，从任何线程调用。)
void	stateHasChanged(CefApp.CefAppState state) Implement this method to get state changes of the CefApp. (实现此方法以获取CefApp的状态更改。)

方法详细资料

getPrintHandler

CefPrintHandler getPrintHandler()

Return the handler for printing on Linux. If a print handler is not provided then printing will not be supported on the Linux platform. (返回处理程序以在Linux上打印。如果未提供打印处理程序，则Linux平台将不支持打印。)

返回:

a reference to a print handler implementation (对打印处理程序实现的引用)

onBeforeCommandLineProcessing

void onBeforeCommandLineProcessing(java.lang.String process_type,
                                   CefCommandLine command_line)

Provides an opportunity to view and/or modify command-line arguments before processing by CEF and Chromium. The |process_type| value will be empty for the browser process. Be cautious when using this method to modify command-line arguments for non-browser processes as this may result in undefined behavior including crashes. (提供机会在CEF和Chromium处理之前查看和/或修改命令行参数。 | process_type |该值对于浏览器进程将为空。使用此方法修改非浏览器进程的命令行参数时要小心，因为这可能导致不确定的行为，包括崩溃。)

参数:

process_type - type of process (empty for browser process). (-进程类型（浏览器进程为空）。)

command_line - values of the command line. (-命令行的值。)

onBeforeTerminate

boolean onBeforeTerminate()

Provides an opportunity to hook into the native shutdown process. This method is invoked if the user tries to terminate the app by sending the corresponding key code (e.g. on Mac: CMD+Q) or something similar. If you want to proceed with the default behavior of the native system, return false. If you want to abort the terminate or if you want to implement your own shutdown sequence return true and do the cleanup on your own. (提供了连接到本机关闭过程的机会。如果用户尝试通过发送相应的密钥代码（例如在Mac上为CMD + Q）或类似方法来终止应用程序，则会调用此方法。如果要继续执行本机系统的默认行为，请返回false。如果要中止终止，或者要实现自己的关闭序列，请返回true并自行进行清理。)

返回:

false to proceed with the default behavior, true to abort terminate. (为false继续默认行为，为true终止终止。)

onContextInitialized

void onContextInitialized()

Called on the browser process UI thread immediately after the CEF context has been initialized. (CEF上下文初始化后立即在浏览器进程UI线程上调用。)

onRegisterCustomSchemes

void onRegisterCustomSchemes(CefSchemeRegistrar registrar)

Provides an opportunity to register custom schemes. Do not keep a reference to the |registrar| object. This method is called on the main thread for each process and the registered schemes should be the same across all processes. (提供注册自定义方案的机会。不要保留对| registrar |的引用。目的。在每个进程的主线程上都会调用此方法，并且所有进程的注册方案都应该相同。)

onScheduleMessagePumpWork

void onScheduleMessagePumpWork(long delay_ms)

Called from any thread when work has been scheduled for the browser process main (UI) thread. This callback should schedule a CefApp.DoMessageLoopWork() call to happen on the main (UI) thread. |delay_ms| is the requested delay in milliseconds. If |delay_ms| is <= 0 then the call should happen reasonably soon. If |delay_ms| is > 0 then the call should be scheduled to happen after the specified delay and any currently pending scheduled call should be cancelled. (在为浏览器进程主（UI）线程安排了工作之后，从任何线程调用。此回调应安排在主（UI）线程上发生CefApp.DoMessageLoopWork（）调用。 | delay_ms |是请求的延迟（以毫秒为单位）。如果| delay_ms |如果<= 0，则该调用应尽快发生。如果| delay_ms |如果> 0，则应安排在指定的延迟后发生呼叫，并且应取消任何当前挂起的计划的呼叫。)

stateHasChanged

void stateHasChanged(CefApp.CefAppState state)

Implement this method to get state changes of the CefApp. See CefApp.CefAppState for a complete list of possible states. For example, this method can be used e.g. to get informed if CefApp has completed its initialization or its shutdown process. (实现此方法以获取CefApp的状态更改。有关可能状态的完整列表，请参见CefApp.CefAppState。例如，可以使用这种方法。获知CefApp是否已完成其初始化或关闭过程。)

参数:

state - The current state of CefApp. (-CefApp的当前状态。)