Android四大组件

Service

BrodcastReceiver

生命周期：onReceive
1.在manifest里面注册这个receiver
<receiver android:name=".OnReceiver">//
<intent-filter
><action android:name="com.example.administrator.mybroadcastreceiver"></action> </intent-filter>
</receiver>

//代码中注册广播（跟Activity绑定）
onReceiver=new OnReceiver();
IntentFilter intentfilter=new IntentFilter();
intentfilter.addAction("com.example.administrator.mybroadcastreceiver");
registerReceiver(onReceiver,intentfilter);

//解除绑定
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(myReceiver);
}

ContentProvider