改造不斷重試時，互聯網是沒有連接

Question

我已經成功實施改造2在我的項目，一切工作正常。但是，一旦互聯網不存在，該應用程序發送多個請求失敗的請求。這會產生一堆失敗的請求，這些請求會不斷生成並導致應用程序被掛起。

我不明白這種行爲的原因。

02-01 16:16:08.812 27970-28054/? D/OkHttp: --> GET https://api.newsapi.in/v1/stories/category/india?nobody=true&skip=0&limit=10 http/1.1 
02-01 16:16:08.812 27970-28054/? D/OkHttp: --> END GET 
02-01 16:16:08.812 27970-28054/? D/OkHttp: <-- HTTP FAILED: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:08.912 27970-28054/? D/OkHttp: --> GET https://api.newsapi.in/v1/stories/category/international?nobody=true&skip=0&limit=10 http/1.1 
02-01 16:16:08.912 27970-28054/? D/OkHttp: --> END GET 
02-01 16:16:08.912 27970-28054/? D/OkHttp: <-- HTTP FAILED: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:08.922 27970-27970/? E/NewsListFragment: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:08.922 27970-27970/? E/NewsListFragment: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:08.942 27970-27979/? I/dalvikvm: Jit: resizing JitTable from 4096 to 8192 
02-01 16:16:09.042 27970-28054/? D/OkHttp: --> GET https://api.newsapi.in/v1/stories/category/india?nobody=true&skip=0&limit=10 http/1.1 
02-01 16:16:09.042 27970-28054/? D/OkHttp: --> END GET 
02-01 16:16:09.042 27970-28054/? D/OkHttp: <-- HTTP FAILED: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.142 27970-28054/? D/OkHttp: --> GET https://api.newsapi.in/v1/stories/category/international?nobody=true&skip=0&limit=10 http/1.1 
02-01 16:16:09.142 27970-28054/? D/OkHttp: --> END GET 
02-01 16:16:09.142 27970-28054/? D/OkHttp: <-- HTTP FAILED: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.152 27970-27970/? E/NewsListFragment: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.162 27970-27970/? E/NewsListFragment: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.282 27970-28054/? D/OkHttp: --> GET https://api.newsapi.in/v1/stories/category/india?nobody=true&skip=0&limit=10 http/1.1 
02-01 16:16:09.282 27970-28054/? D/OkHttp: --> END GET 
02-01 16:16:09.282 27970-28054/? D/OkHttp: <-- HTTP FAILED: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.402 27970-28054/? D/OkHttp: --> GET https://api.newsapi.in/v1/stories/category/international?nobody=true&skip=0&limit=10 http/1.1 
02-01 16:16:09.402 27970-28054/? D/OkHttp: --> END GET 
02-01 16:16:09.402 27970-28054/? D/OkHttp: <-- HTTP FAILED: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.412 27970-27970/? E/NewsListFragment: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.432 27970-27970/? D/dalvikvm: GC_FOR_ALLOC freed 2592K, 13% free 21331K/24320K, paused 27ms, total 27ms 
02-01 16:16:09.442 27970-27970/? E/NewsListFragment: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.552 27970-28054/? D/OkHttp: --> GET https://api.newsapi.in/v1/stories/category/india?nobody=true&skip=0&limit=10 http/1.1 
02-01 16:16:09.552 27970-28054/? D/OkHttp: --> END GET 
02-01 16:16:09.552 27970-28054/? D/OkHttp: <-- HTTP FAILED: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.662 27970-28054/? D/OkHttp: --> GET https://api.newsapi.in/v1/stories/category/international?nobody=true&skip=0&limit=10 http/1.1 
02-01 16:16:09.662 27970-28054/? D/OkHttp: --> END GET 
02-01 16:16:09.662 27970-28054/? D/OkHttp: <-- HTTP FAILED: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.662 27970-27970/? E/NewsListFragment: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 
02-01 16:16:09.672 27970-27970/? E/NewsListFragment: java.net.UnknownHostException: Unable to resolve host "api.newsapi.in": No address associated with hostname 

Answer 1

改裝不重試。不過OkHttp有這樣的功能。看看this article。它是默認啓用的。

您可以通過調用OkHttpClient.BuilderretryOnConnectionFailure禁用它。

這種變化是由於改造2.1.0（OkHttp 3.3.0）存在。

Answer 2

當手機沒有連接到互聯網時，不要一遍又一遍的重複請求。

創建的Util類你自己的，你叫互聯網請求移動是否連接到互聯網或沒有，然後發送請求之前檢查的常用方法。以下是檢查您的手機是否連接到互聯網的常用方法

public static boolean hasNetworkConnection(Context context) { 
    if (context == null) return false; 
    ConnectivityManager cm = (ConnectivityManager) context.getSystemService(CONNECTIVITY_SERVICE); 
    //Was causing crash due to required permission for access network state 
    NetworkInfo activeNetwork = cm.getActiveNetworkInfo(); 
    if (activeNetwork != null) { 
     if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) 
      return activeNetwork.isConnected(); 
     else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) 
      return activeNetwork.isConnected(); 
    } 
    return false; 
}