RuntimeInit.java源码解析

源码位置：frameworks/base/core/java/com/android/internal/os/RuntimeInit.java

commonInit方法

192     @UnsupportedAppUsage
193     protected static final void commonInit() {
194         if (DEBUG) Slog.d(TAG, "Entered RuntimeInit!");
195 
196         /*
197          * set handlers; these apply to all threads in the VM. Apps can replace
198          * the default handler, but not the pre handler.
199          */
200         LoggingHandler loggingHandler = new LoggingHandler();
201         RuntimeHooks.setUncaughtExceptionPreHandler(loggingHandler);
202         Thread.setDefaultUncaughtExceptionHandler(new KillApplicationHandler(loggingHandler));
}

applicationInit方法

357         final Arguments args = new Arguments(argv);
358 
359         // The end of of the RuntimeInit event (see #zygoteInit).
360         Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
361 
362         // Remaining arguments are passed to the start class's static main
363         return findStaticMain(args.startClass, args.startArgs, classLoader);

→findStaticMain

利用反射找到SystemServer的main方法，并通过Runnable封装返回。