本文共 1375 字，大约阅读时间需要 4 分钟。

Android Activity????????????????

Activity???????????

?Android????Activity???????android:launchMode???????????????standard?????singleTop?singleTask?singleInstance??????Task??????????????????????????????????

1. standard??????

standard?Activity????????????????????Activity??Intent??????Activity?????Activity?????Task????????????Activity???????????????Task??????A ? B ? C ? D???D???B?Task????A ? B ? C ? D ? B?????????D?C?B?A?????????

2. singleTop ??

singleTop?????????Activity??????????Activity????????????Task??????A ? B ? C ? D??D???singleTop??????D??????????????Activity???Top???????????????B??singleTop??????B????????

3. singleTask ??

singleTask???????Task????????Activity???????B?singleTask??????B??????B?????????????????B???Activity??????Task??A ? B ? C ? D????B?????A ? B?C?D???

4. singleInstance ??

singleInstance????Activity?????????Task??????C???D?D?singleInstance??????????Task??D????????????D??????????????Task?1?A ? B ? C?Task?2?D??D???C?Task?1??A ? B ? C ? C?

?????????????????

????????Activity?????????????????????????????Activity??onPause ? onStop ? onDestroy ? onCreate ? onStart ? onResume??????????Activity????????????????

????

?AndroidManifest.xml??????

????

• orientation???????????????
• keyboardHidden????????????????
• screenSize???????????????

????

• ??????screenSize???????????????4.0?????
• ????????????????????????????????

??????????????????????????????????

转载地址：http://kytk.baihongyu.com/