如何在应用程序变为活动状态或成为前台时重新加载所有数据？在iOS上有这样的东西：
[[NSNotificationCenter defaultCenter]addObserver:self
selector:@selector(viewDidLoad)
name:UIApplicationDidBecomeActiveNotification
object:nil];
答案 0 :(得分：0)
1）在Android中，您还无法清楚地了解整个应用程序何时具有前瞻性。虽然有一些非常好的黑客。看看这个Stack Overflow答案。但要注意，你应该使用onStart和onStop而不是onResume和onPause，如答案所指定的那样。
2）你可以告诉特定活动（通常是应用程序中的单个页面）何时在前台。我假设通过重新加载数据，您的意思是您想从本地数据库重新加载数据或从服务器获取数据。在任何一种情况下，您都可以通过覆盖Activity的onResume（）方法来完成此操作。
-------------- Clean: DebugWin64 in infiltrator (compiler: MinGW)---------------
Cleaned "infiltrator - DebugWin64"
-------------- Build: DebugWin64 in infiltrator (compiler: MinGW)---------------
i686-w64-mingw32-g++ -Wall -std=c++11 -Wall -g -m64 -pthread -I/usr/include/gtkmm-3.0 -I/usr/lib/x86_64-linux-gnu/gtkmm-3.0/include -I/usr/include/atkmm-1.6 -I/usr/include/gtk-3.0/unix-print -I/usr/include/gdkmm-3.0 -I/usr/lib/x86_64-linux-gnu/gdkmm-3.0/include -I/usr/include/giomm-2.4 -I/usr/lib/x86_64-linux-gnu/giomm-2.4/include -I/usr/include/pangomm-1.4 -I/usr/lib/x86_64-linux-gnu/pangomm-1.4/include -I/usr/include/glibmm-2.4 -I/usr/lib/x86_64-linux-gnu/glibmm-2.4/include -I/usr/include/gtk-3.0 -I/usr/include/at-spi2-atk/2.0 -I/usr/include/at-spi-2.0 -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/usr/include/gtk-3.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/mirclient -I/usr/include/mircommon -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/pango-1.0 -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/cairomm-1.0 -I/usr/lib/x86_64-linux-gnu/cairomm-1.0/include -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/sigc++-2.0 -I/usr/lib/x86_64-linux-gnu/sigc++-2.0/include -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libpng12 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/x86_64-linux-gnu -v -DWINVER=0x0400 -D__WIN95__ -D__GNUWIN32__ -DSTRICT -DHAVE_W32API_H -D__WXMSW__ -D__WINDOWS__ -DWINVER=0x0400 -D__WIN95__ -D__GNUWIN32__ -DSTRICT -DHAVE_W32API_H -D__WXMSW__ -D__WINDOWS__ -Iinclude -I/usr/x86_64-w64-mingw32/include -I/usr/x86_64-w64-mingw32/include -c /home/jason/Code/Repositories/infiltrator-git/main.cpp -o obj/Debug/Winx64/main.o
Using built-in specs.
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/home/jason/Code/Repositories/infiltrator-git/main.cpp:1:0: sorry, unimplemented: 64-bit mode not compiled in
#include <glibmm.h>
^
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compiled by GNU C version 4.9.2, GMP version 6.0.0, MPFR version 3.1.2-p11, MPC version 1.0.3
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Process terminated with status 1 (0 minute(s), 0 second(s))
1 error(s), 0 warning(s) (0 minute(s), 0 second(s))