Android AdMob不会显示广告

我将admob放入一个应用程序中，并对其进行了测试，它在模拟器和广告显示中运行良好，但当我尝试检查它是否在我的手机上运行时，广告不会显示，我在logcat中收到以下错误消息：

06-02 10:30:58.405: W/Ads(6148): IOException connecting to ad url.
06-02 10:30:58.405: W/Ads(6148): java.net.ConnectException: failed to connect to googleads.g.doubleclick.net/127.0.0.1 (port 80): connect failed: ECONNREFUSED (Connection refused)
06-02 10:30:58.405: W/Ads(6148):    at libcore.io.IoBridge.connect(IoBridge.java:114)
06-02 10:30:58.405: W/Ads(6148):    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
06-02 10:30:58.405: W/Ads(6148):    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
06-02 10:30:58.405: W/Ads(6148):    at java.net.Socket.connect(Socket.java:842)
06-02 10:30:58.405: W/Ads(6148):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:77)
06-02 10:30:58.405: W/Ads(6148):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
06-02 10:30:58.405: W/Ads(6148):    at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351)
06-02 10:30:58.405: W/Ads(6148):    at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86)
06-02 10:30:58.405: W/Ads(6148):    at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
06-02 10:30:58.405: W/Ads(6148):    at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)
06-02 10:30:58.405: W/Ads(6148):    at libcore.net.http.HttpEngine.connect(HttpEngine.java:303)
06-02 10:30:58.405: W/Ads(6148):    at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)
06-02 10:30:58.405: W/Ads(6148):    at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)
06-02 10:30:58.405: W/Ads(6148):    at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
06-02 10:30:58.405: W/Ads(6148):    at com.google.ads.internal.f.b(SourceFile:428)
06-02 10:30:58.405: W/Ads(6148):    at com.google.ads.internal.f.run(SourceFile:399)
06-02 10:30:58.405: W/Ads(6148):    at java.lang.Thread.run(Thread.java:856)
06-02 10:30:58.405: W/Ads(6148): Caused by: libcore.io.ErrnoException: connect failed:
.................. 

06-02 10:30:58.405:W/Ads（6148）：IOException连接到ad url。
06-02 10:30:58.405:W/Ads（6148）：java.net.ConnectException:无法连接到googleads.g.doubleclick.net/127.0.0.1（端口80）：连接失败：EConRefused（连接被拒绝）
06-02 10:30:58.405:W/Ads（6148）：位于libcore.io.IoBridge.connect（IoBridge.java:114）
06-02 10:30:58.405:W/Ads（6148）：位于java.net.PlainSocketImpl.connect（PlainSocketImpl.java:192）
06-02 10:30:58.405:W/Ads（6148）：位于java.net.PlainSocketImpl.connect（PlainSocketImpl.java:459）
06-02 10:30:58.405:W/Ads（6148）：位于java.net.Socket.connect（Socket.java:842）
06-02 10:30:58.405:W/Ads（6148）：在libcore.net.http.HttpConnection.（HttpConnection.java:77）
06-02 10:30:58.405:W/Ads（6148）：在libcore.net.http.HttpConnection.（HttpConnection.java:50）
06-02 10:30:58.405:W/Ads（6148）：在libcore.net.http.HttpConnection$Address.connect（HttpConnection.java:351）
06-02 10:30:58.405:W/Ads（6148）：位于libcore.net.http.HttpConnectionPool.get（HttpConnectionPool.java:86）
06-02 10:30:58.405:W/Ads（6148）：位于libcore.net.http.HttpConnection.connect（HttpConnection.java:128）
06-02 10:30:58.405:W/Ads（6148）：位于libcore.net.http.HttpEngine.openSocketConnection（HttpEngine.java:308）
06-02 10:30:58.405:W/Ads（6148）：位于libcore.net.http.HttpEngine.connect（HttpEngine.java:303）
06-02 10:30:58.405:W/Ads（6148）：位于libcore.net.http.HttpEngine.sendSocketRequest（HttpEngine.java:282）
06-02 10:30:58.405:W/Ads（6148）：位于libcore.net.http.HttpEngine.sendRequest（HttpEngine.java:232）
06-02 10:30:58.405:W/Ads（6148）：在libcore.net.http.HttpURLConnectionImpl.connect（HttpURLConnectionImpl.java:80）
06-02 10:30:58.405:W/Ads（6148）：位于com.google.Ads.internal.f.b（源文件：428）
06-02 10:30:58.405:W/Ads（6148）：在com.google.Ads.internal.f.run（源文件：399）
06-02 10:30:58.405:W/Ads（6148）：at java.lang.Thread.run（Thread.java:856）
06-02 10:30:58.405:W/Ads（6148）：原因：libcore.io.ErrnoException:连接失败：
.................. 

手机已连接到wifi，互联网工作正常

编辑：

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它不起作用的原因是因为我正在运行一个自定义rom，它阻止了所有广告，解决方法是编辑主机文件并从中删除所有广告阻止！：）

这是手机方面的问题，而不是代码方面的问题，请尝试启用飞行模式几秒钟，然后将其禁用。

如果我限制他们的程序，没有阻止广告的普通用户将受到影响：(