我要评论两个service之间相互监视的实现
在实际开发中可能需要用到两个service相互监视的情况，本示例就是实现此功能以作参考。
服务a：
public class servicea extends service {
private static final string tag = servicea.class.getsimplename();
mybinder mbinder;
myserviceconnection mserviceconnection;
pendingintent mpendingintent;
@override
public void oncreate() {
super.oncreate();
if(mbinder==null)
{
mbinder=new mybinder();
}
mserviceconnection=new myserviceconnection();
}
@override
public int onstartcommand(intent intent, int flags, int startid) {
servicea.this.bindservice(new intent(servicea.this,serviceb.class),mserviceconnection, context.bind_important);
mpendingintent=pendingintent.getservice(this,0,intent,0);
notification.builder builder=new notification.builder(this);
builder.setticker("守护服务a启动中")
.setcontenttext("我是来守护服务b的")
.setcontenttitle("守护服务a")
.setsmallicon(r.mipmap.ic_launcher)
.setcontentintent(mpendingintent)
.setwhen(system.currenttimemillis());
notification notification=builder.build();
startforeground(startid,notification);
return start_sticky;
}
@override
public ibinder onbind(intent intent) {
return mbinder;
}
public class mybinder extends ibridgeinterface.stub {
@override
public string getname() throws remoteexception {
return "name:"+tag;
}
}
class myserviceconnection implements serviceconnection {
@override
public void onserviceconnected(componentname componentname, ibinder ibinder) {
string name=null;
try {
name= ibridgeinterface.stub.asinterface(ibinder).getname();
} catch (remoteexception e) {
e.printstacktrace();
}
toast.maketext(servicea.this,name+"连接成功",toast.length_short).show();
}
@override
public void onservicedisconnected(componentname componentname) {
toast.maketext(servicea.this,tag+"断开连接",toast.length_short).show();
servicea.this.startservice(new intent(servicea.this,serviceb.class));
servicea.this.bindservice(new intent(servicea.this,serviceb.class),mserviceconnection, context.bind_important);
}
}
}
服务b：
public class serviceb extends service {
private static final string tag = serviceb.class.getsimplename();
private pendingintent mpendingintent;
private mybinder mbinder;
private myserviceconnection mserviceconnection;
@override
public ibinder onbind(intent intent) {
return mbinder;
}
@override
public void oncreate() {
super.oncreate();
if (mbinder == null) {
mbinder = new mybinder();
}
mserviceconnection = new myserviceconnection();
}
@override
public int onstartcommand(intent intent, int flags, int startid) {
this.bindservice(new intent(serviceb.this, servicea.class), mserviceconnection, context.bind_important);
mpendingintent = pendingintent.getservice(this, 0, intent, 0);
notification.builder builder = new notification.builder(this);
builder.setticker("守护服务b启动中")
.setcontenttext("我是来守护服务a的")
.setcontenttitle("守护服务b")
.setsmallicon(r.mipmap.ic_launcher)
.setcontentintent(mpendingintent)
.setwhen(system.currenttimemillis());
notification notification = builder.build();
startforeground(startid, notification);
return start_sticky;
}
public class mybinder extends ibridgeinterface.stub {
@override
public string getname() throws remoteexception {
return "name:"+tag;
}
}
class myserviceconnection implements serviceconnection {
@override
public void onserviceconnected(componentname componentname, ibinder ibinder) {
string name=null;
try {
name=ibridgeinterface.stub.asinterface(ibinder).getname();
} catch (remoteexception e) {
e.printstacktrace();
}
toast.maketext(serviceb.this, name + "连接成功", toast.length_short).show();
}
@override
public void onservicedisconnected(componentname componentname) {
toast.maketext(serviceb.this, tag + "断开连接", toast.length_short).show();
serviceb.this.startservice(new intent(serviceb.this, servicea.class));
serviceb.this.bindservice(new intent(serviceb.this, servicea.class), mserviceconnection, context.bind_important);
}
}
}
ibridgeinterface.aidl
1 interface ibridgeinterface {
2 string getname();
3 }
界面：
public class mainactivity extends activity {
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
startservice(new intent(this, servicea.class));
startservice(new intent(this, serviceb.class));
}
}
androidmanifest.xml
<service android:name=".services.servicea" />
<service
android:name=".services.serviceb"
android:process=":remote" />
由于涉及到跨进程，onserviceconnected() 方法中使用
ibridgeinterface.stub.asinterface(ibinder).getname();
而不能直接类型转换
((servicea.mybinder)ibinder).getname();
onstartcommand
onstartcommand() 方法必须返回整型数。整型数是一个值，用于描述系统应该如何在服务终止的情况下继续运行服务。
返回的值必须是以下常量之一：
start_not_sticky
如果系统在 onstartcommand() 返回后终止服务，则除非有挂起 intent 要传递，否则系统不会重建服务。
start_sticky
如果系统在 onstartcommand() 返回后终止服务，则会重建服务并调用 onstartcommand()，但绝对不会重新传递最后一个 intent。相反，除非有挂起 intent 要启动服务（在这种情况下，将传递这些 intent ），否则系统会通过空 intent 调用 onstartcommand()。这适用于不执行命令、但无限期运行并等待作业的媒体播放器（或类似服务）。
start_redeliver_intent
如果系统在 onstartcommand() 返回后终止服务，则会重建服务，并通过传递给服务的最后一个 intent 调用 onstartcommand()。任何挂起 intent 均依次传递。这适用于主动执行应该立即恢复的作业（例如下载文件）的服务。
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