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HomeBackend DevelopmentPHP Tutorial运用phprpc协议实现Android客户端的一些总结

应用phprpc协议实现Android客户端的一些总结

本来这篇文章会放Android版本做完就写的~结果由于一系列的事情而耽搁掉了,下面是我在使用phprpc协议编写android应用时出现的问题的一些心得总结。

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1、登陆机制及客户端同步问题

服务端是由phprpc提供的远程调用接口,当然首先要开启android的互联网访问权限:

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<uses-permission android:name="android.permission.INTERNET"></uses-permission>

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? 在AndroidManifest.xml插入以上语句,哎。。。这个语句害小弟查了半天啊。。。程序编好居然一直没法显示内容一查才知道少了这个权限,打死我也不会忘了它~~

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接着因为服务端用的是会话保存HashCode形式的登录验证模式。就是说在客户端中一直公用同一个客户端对象和HashCode,在Android不能像Web应用一样使用Session或Cookie跨页面全局变量,如以前有一篇我写的博文写的可以用Android自带的全局对象。创建如下代码:

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import org.phprpc.PHPRPC_Client;import android.app.Application;public class ShareContext extends Application {	private PHPRPC_Client client = null;	private String source = null;	public String getSource() {		return source;	}	public void setSource(String source) {		this.source = source;	}	public PHPRPC_Client getClient() {		return client;	}	public void setClient(PHPRPC_Client client) {		this.client = client;	}}

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? 上面就是公用的客户端对象和HashCode,并在AndroidManifest.xml中更改下列代码:

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<application android:name=".ShareContext" android:icon="@drawable/icon" android:label="@string/app_name"></application>

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? 上面的android:name=".ShareContext"这句话就是声明一个context上下文全局变量,再详细的参见那篇博文。

初次登陆初始化上下文对象:

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shareContext = ((ShareContext)getApplicationContext());		this.client = shareContext.getClient();		this.source = shareContext.getSource();				if(this.client == null){						Intent it = getIntent();	        String accountStr = it.getStringExtra("accountStr").toString();	        String passwordStr = it.getStringExtra("passwordStr").toString();	        	        this.client = new PHPRPC_Client(SERVICE_URL);  	        this.client.setEncryptMode(2);  	        	        this.source = Cast.toString(client.invoke("check_login", new Object[]{accountStr,passwordStr}));	        	        if(this.source == null){	        	Log.e("flowg_error", "source not find!");	        	Toast.makeText(getApplicationContext(), "验证错误",Toast.LENGTH_SHORT).show();	        }else{	        	client.useService(SERVICE_URL);		        shareContext.setClient(this.client);		        shareContext.setSource(this.source);	        }	        	        Object s = client.invoke("selfuser_timeline", new Object[]{source,0,20});			Log.v("source0",s.toString());	       		}

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? 之后就可以在其他Activity中取出上下文对象中这两个属性了:

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	shareContext = ((ShareContext)getApplicationContext());    	client = shareContext.getClient();    	source = shareContext.getSource();

? 在其后就能正式的使用它们了。

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2、关于远程调用传输的数组序列化问题

在phprpc中虽然传输的是php编译化hash码,但客户端调用后回调中的一般会转化为现有系统无法识别的数组,对于php服务端传输过了是一个索引数组,而在java端是没有索引数组这一说的,准确是一个经过处理的HashMap,刚开始还不知道phprpc库有提供数组序列化解析库,一直取不出里面的值(协议库相当不错,但api文档做的貌似差了点),搞phprpc就是看源码来弄,api什么的只是入个门,在看源码时候发现有AssocArray这样一个库自带索引数组类。。。好吧,继续。。。

现在问题就解决了,看下面代码:

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this.list = new ArrayList<topicinfo>();AssocArray alist = (AssocArray)client.invoke("home_timeline", new Object[]{this.source,0,20});for(int i = 0 ; i <p>在对于invoke远程调用时返回数组直接格式化为<span style="white-space: pre;">AssocArray类,接下来就能像使用HashMap一样使用get方法取出数据了,这个索引数组类并不是继承HashMap,而是将HashMap作为内部属性</span></p>
<p>,就是说phprpc库对LinkedHashMap链式HashMap做了一层外层封装,里面的方法基本和HashMap差不多,具体可以看源码。</p>
<p>?</p>
<p><span style="white-space: pre;">	</span>3、远程调用字符串的格式化</p>
<p><span style="white-space: pre;">	</span>这个问题貌似在网上有很多人提问。。。看了这个api文档真的得修正修正了,其实分析了源文件源码后会发现原来phprpc还是提供解析类,这个类就是Cast,</p>
<p>直接调用下面的静态方法便可以搞定:</p>
<p>?</p>
<pre name="code" class="java">Cast.toString(a.get("nickname"));

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小结:感觉phprpc的api文档真的做的不咋的。。有待完善,害得我有问题就要看库源码,不过感觉android平台下使用phprpc应该和java下没有什么区别,刚开始的xml配置丢失搞的我很懊恼啊,而其中的格式化数组字符串什么的也折腾了好久。。。善哉善哉。。。

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