android之activity

页面跳转有3种：

1、普通跳转

Intent inent=new Intent(Loc.this,Dest.class);

startActivity(intent);

2、带数据跳转

3、带结果跳转

activity生命周期：

onCreate -->onStart -->onResume -->onPause -->onStop -->onDestroy

                            |                      |                         |                  |

                            |                      <------------------                  | 

                        onRestart<---------------------------------------

activity启动模式：standard、singleTop、singleTask、singleInstance

activity启动主题：全屏、对话框，定义style