android activity 单例
场景：android中activity的单例起动
android中activity的单例启动
android中activity的单例启动
public static void startActivity(Context context, String className, long time) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setClassName(context, className);
intent.putExtra(EVENT_BEGIN_TIME, time);
intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT | Intent.FLAG_ACTIVITY_SINGLE_TOP);
context.startActivity(intent);
}