Android四大组件
<code>Activity</code>
<code>Service</code>
<code>BroadCastReceiver</code>
<code>Content Provider</code>
Activity
- Activity的生命周期
- onCreate():创建
- onStart():运行
- onResume():获取焦点
- onPause():失去焦点
- onStop():暂停
- onDestroy():销毁
- onRestart():重启
- Activity四种状态
- Activ/Running 活动状态
- Pause 暂停状态
- Stopped 停止状态
- Killed 非活动状态
Fragment
- Fragment的生命周期
- onAttach()
- onCreate()
- onCreateView()
- onActivityCreated()
- onStart()
- onResume()
- onPause()
- onStop()
- onDestoryView()
- onDestory()
- onDetach()
Intent
- Intent实现页面之间跳转
- startActivity(intent)
- startActivityForResult(intent, requestCode, options)
- 传递类 onActivityResult(int requestCode, int resultCode, Intent data)
- 接收类 setResult(int resultCode,Intent intent)
