android并发网络请求的处理
来源:互联网 发布:java获取所有interface 编辑:程序博客网 时间:2024/06/06 17:22
最近在做android客户端的统计sdk,为了保证数据统计的准确行,需要把一些基本信息,和无网络情况下用户的操作保存到SqlLite本地数据库中,等待有网了的时候进行传;
基本解决思路,离线操作的数据请求URL和请求参数进行封装,封装到对象中,转化为json存储到SQlLite数据库中;定时任务检测网络情况,如果有网,则把数据库中数据取出,进行网络上传;
取出数据库中请求,就需要处理大量网络请求,同时发送请求的情况,一般来说一个网络请求都会用使用到一个异步线程,大量的线程创建、运行、销毁又造成了系统资源的浪费,而且同时同时new出多个子线程也会造成客户端卡死现象;于是考虑到能不能做个请求队列去进行控制
在这个模型中,有高中低三个优先级信道如下:高优先级--1,中优先级--3,低优先级--2
规则:
1.正常情况下各个优先级使用各自信道(线程)
2.高级信道满载、中、低级信道空置,则高级请求可使用低级信道
构思:
UI线程将期望的网络请求url和参数通过一个封装好的Runnable提交给Service处理(当然也可以交给一个Thread处理,本例使用Service),Service接收到请求,判断优先级,加入到相应线程池中排队。线程池启动线程发起网络请求,最后通过监听器将结果返回给Service,Service发送广播通知UI线程,UI线程更新相关界面,结束。
废话说完,上例子:
首先是封装好的Runnable
- public
class HttpConnRunnable implementsRunnable, Parcelable { -
-
public static final int HIGH_LEVEL 0;= -
public static final int NORMAL_LEVEL 1;= -
public static final int LOW_LEVEL 2;= -
-
private int mPriority //优先级,默认为普通= NORMAL_LEVEL; -
private String "";mUrl = -
-
private HttpConnListener //监听器mListener; -
-
-
public HttpConnRunnable() { -
super(); -
} -
-
public HttpConnRunnable( intpriority) { -
super(); -
mPriority = priority; -
} -
-
@Override -
public void run() { -
Log.i(Thread.currentThread().getName(), "----Start to connect:" + ",mUrl + priority:" + "-----");mPriority + -
try { -
Thread.sleep(10000); -
//TODO:进行网络请求相关操作,并通过listener返回结果 -
mListener.onSucceed("Connected to " + "mUrl + succeed!" ); -
} -
catch (InterruptedException e) { -
e.printStackTrace(); -
} -
Log.i(Thread.currentThread().getName(), "----Finish to connect:" + ",mUrl + priority:" + "-----");mPriority + -
} -
-
public int getPriority() { -
return mPriority; -
} -
-
public void setPriority( intpriority) { -
mPriority = priority; -
} -
-
public String getURL() { -
return mUrl; -
} -
-
public void setURL(String url) { -
mUrl = url; -
} -
-
public void setHttpConnListener(HttpConnListener listener) { -
mListener = listener; -
} -
-
//序列化,为了传递给Service,如果是使用Thread处理本例,则无需序列化 -
public static final Parcelable.Creator newCREATOR = Creator() { -
@Override -
public HttpConnRunnable createFromParcel(Parcel source) { -
HttpConnRunnable data = null; -
Bundle bundle = source.readBundle(); -
if(bundle != null){ -
data = new HttpConnRunnable(bundle.getInt( "PRIORITY")); -
data.mUrl = bundle.getString("URL"); -
} -
return data; -
} -
-
@Override -
public HttpConnRunnable[] intnewArray( size) { -
return new HttpConnRunnable[size]; -
} -
}; -
-
@Override -
public int describeContents() { -
return 0; -
} -
-
@Override -
public void writeToParcel(Parcel intdest, flags) { -
Bundle bundle = new Bundle(); -
bundle.putInt("PRIORITY", mPriority); -
bundle.putString("URL", mUrl); -
dest.writeBundle(bundle); -
} -
- }
Service的处理:
- public
class HttpConnService extendsService implementsHttpConnListener { -
public static final String "HttpPoolParam";HTTP_POOL_PARAM_KEYWORD = -
-
private final int HIGH_POOL_SIZE 1;= -
private final int NORMAL_POOL_SIZE 3;= -
private final int LOW_POOL_SIZE 2;= -
-
// 可重用固定线程数的线程池 -
private ThreadPoolExecutor mHighPool; -
private ThreadPoolExecutor mNormalPool; -
private ThreadPoolExecutor mLowPool; -
-
@Override -
public void onCreate() { -
//初始化所有 -
mHighPool = (ThreadPoolExecutor) Executors.newFixedThreadPool(HIGH_POOL_SIZE); -
mNormalPool = (ThreadPoolExecutor) Executors.newFixedThreadPool(NORMAL_POOL_SIZE); -
mLowPool = (ThreadPoolExecutor) Executors.newFixedThreadPool(LOW_POOL_SIZE); -
-
super.onCreate(); -
} -
-
@Override -
public int onStartCommand(Intent intintent, flags, intstartId) { -
//接受到来自UI线程的请求 -
//取出Runnable,并加入到相应队列 -
Bundle bundle = intent.getExtras(); -
HttpConnRunnable httpConnRunnable = bundle.getParcelable(HTTP_POOL_PARAM_KEYWORD); -
if (httpConnRunnable null)!= { -
httpConnRunnable.setHttpConnListener(HttpConnService.this); -
int level = httpConnRunnable.getPriority(); -
switch (level) { -
case HttpConnRunnable.HIGH_LEVEL: -
//如果高级池满而低级池未满交由低级池处理 -
//如果高级池满而普通池未满交由普通池处理 -
//如果高级池未满则交给高级池处理,否则,交由高级池排队等候 -
if (mHighPool.getActiveCount() == HIGH_POOL_SIZE && mLowPool.getActiveCount() < LOW_POOL_SIZE) { -
mLowPool.execute(httpConnRunnable); -
} -
else if (mHighPool.getActiveCount() == HIGH_POOL_SIZE && mNormalPool.getActiveCount() < NORMAL_POOL_SIZE) { -
mNormalPool.execute(httpConnRunnable); -
} -
else { -
mHighPool.execute(httpConnRunnable); -
} -
break; -
-
case HttpConnRunnable.NORMAL_LEVEL: -
//如果普通池满而低级池未满交由低级池处理 -
//如果普通池未满则交给普通池处理,否则,交由普通池排队等候 -
if (mNormalPool.getActiveCount() == NORMAL_POOL_SIZE && mLowPool.getActiveCount() < LOW_POOL_SIZE) { -
mLowPool.execute(httpConnRunnable); -
} -
else { -
mNormalPool.execute(httpConnRunnable); -
} -
break; -
-
case HttpConnRunnable.LOW_LEVEL: -
mLowPool.execute(httpConnRunnable); -
break; -
} -
} -
return super.onStartCommand(intent, flags, startId); -
} -
-
@Override -
public void onDestroy() { -
mHighPool.shutdownNow(); -
mNormalPool.shutdownNow(); -
mLowPool.shutdownNow(); -
-
-
mNormalPool = null; -
mLowPool = null; -
super.onDestroy(); -
} -
-
@Override -
public IBinder onBind(Intent intent) { -
return null; -
} -
-
@Override -
public void onSucceed(String result) { -
Intent intent = new Intent(); -
intent.setAction("com.ezstudio.connpool.HttpConnReceiver"); -
-
// 要发送的内容 -
intent.putExtra("RESULT", result); -
-
// 发送 一个无序广播 -
sendBroadcast(intent); -
} -
-
@Override -
public void onFailed() { -
// TODO Auto-generated method stub -
} - }
Receiver的处理比较简单:
- public
class HttpConnReceiver extendsBroadcastReceiver { -
private HttpConnListener mListener; -
-
public void setHttpConnListener (HttpConnListener listener) { -
mListener = listener; -
} -
-
@Override -
public void onReceive(Context context, Intent intent) { -
String action = intent.getAction(); -
if (action.equals( "com.ezstudio.connpool.HttpConnReceiver")){ -
String result = intent.getStringExtra("RESULT"); -
mListener.onSucceed(result); -
} -
} -
- }
1 0
- android并发网络请求的处理
- Android 并发网络请求的处理
- android并发请求处理
- Android并发网络请求,刚好碰到token失效的处理方案
- 处理多个网络请求的并发的情况
- IOS-如何处理多个网络请求的并发的情况
- iOS开发系列--并行开发(处理多个网络请求并发的情况)
- iOS开发—处理多个网络请求并发的情况
- iOS 多个网络请求并行/并发处理
- Volley高并发处理网络请求(No1)
- Volley高并发处理网络请求(No2)
- iOS 多个网络请求并行/并发处理
- iOS 多个网络请求并行/并发处理
- iOS 多个网络请求并行/并发处理
- Android 网络请求超时处理方案
- linux网络编程之socket(四):使用fork并发处理多个client的请求和对等通信p2p
- linux网络编程之socket(四):使用fork并发处理多个client的请求和对等通信p2p
- Linux网络编程之socket:使用fork并发处理多个client的请求和对等通信P2P
- iOS开发 automaticallyAdjustsScrollViewInsets 属性设置
- learn python the hard way(笨办法学python) 练习50
- 《编写高质量iOS与OS X代码的52个有效方法》之第二章要点
- mongodb 日志过大
- 第四届_连号区间数
- android并发网络请求的处理
- html5 indexDB
- 如何在Xib中设置Button的属性(圆角以及背景颜色)
- 汇编学习笔记之寄存器综述
- jsp 编辑word:jsp word编辑 文件传输错误,请检查你的网络
- Spotify联姻Google,将后端服务迁移入云
- warning: libssl.so.1.0.0, needed by ……lib/libcurl.so, not found (try using -rpath or -rpath-link)
- Android studio使用基础
- Android 版本号 与 API Level 版本 对应表