在我的应用程序中我正在尝试进行请求，但我收到了一个错误。这是我的代码和例外。我查看了我的代码，我看到来自最终HttpResponse的异常响应= client.execute（请求）;这条线。这是什么问题。
public static String getResponse(final HttpUriRequest request, final int successCode, final boolean requiresResponse) {
final StringBuilder sb = new StringBuilder();
final HttpClient client = getHttpClient();
System.out.println("getResponce4");
try {
final HttpResponse response = client.execute(request);
System.out.println("getResponce5");
final HttpEntity entity = response.getEntity();
System.out.println("getResponce6");
if (entity != null) {
final InputStream stream = entity.getContent();
byte bytes[] = new byte[4096];
int numBytes;
while ((numBytes=stream.read(bytes))!=-1) {
if (numBytes!=0) {
sb.append(new String(bytes, 0, numBytes));
}
}
}
if (response.getStatusLine().getStatusCode() != successCode) {
closeConnection(client);
throw new Exception(sb.toString());
}
System.out.println("getResponce1");
closeConnection(client);
System.out.println("getResponce2");
if (!requiresResponse) return null;
System.out.println("getResponce3");
} catch (IOException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (Exception e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
return sb.toString();
}
private static void closeConnection(final HttpClient client) {
try {
final Method closeMethod = client.getClass().getMethod("close");
if (closeMethod != null) {
closeMethod.invoke(client);
}
}
catch (IllegalArgumentException ignored) {}
catch (IllegalAccessException ignored) {}
catch (InvocationTargetException ignored) {}
catch (SecurityException ignored) {}
catch (NoSuchMethodException ignored) {}
}
private static HttpClient getHttpClient() {
Class<?> androidClientClass;
try {
androidClientClass = Class.forName("android.net.http.AndroidHttpClient");
final Method method = androidClientClass.getMethod("newInstance", String.class);
return (HttpClient) method.invoke(null, "newInstance");
} catch (ClassNotFoundException ignored) {}
catch (IllegalArgumentException ignored) {}
catch (IllegalAccessException ignored) {}
catch (InvocationTargetException ignored) {}
catch (SecurityException ignored) {}
catch (NoSuchMethodException ignored) {}
return new DefaultHttpClient();
}
private static String notInitialized() {
return "{ \"errorCode\" : 101 }";
}
public static String getAddress(final String key1, final String key2, final String lat, final String lng) throws Exception {
final HttpGet get = new HttpGet("http://192.168.1.4:3000/api/1.0/zoappsgeo/address/lookup");
return getResponse(get, 200, true);
}
例外
08-01 14:44:29.272: WARN/System.err(14718): java.lang.RuntimeException: This thread forbids HTTP requests
08-01 14:44:29.272: WARN/System.err(14718): at android.net.http.AndroidHttpClient$1.process(AndroidHttpClient.java:91)
08-01 14:44:29.272: WARN/System.err(14718): at org.apache.http.protocol.BasicHttpProcessor.process(BasicHttpProcessor.java:290)
08-01 14:44:29.272: WARN/System.err(14718): at org.apache.http.protocol.HttpRequestExecutor.preProcess(HttpRequestExecutor.java:160)
08-01 14:44:29.272: WARN/System.err(14718): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:401)
08-01 14:44:29.272: WARN/System.err(14718): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
08-01 14:44:29.272: WARN/System.err(14718): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
08-01 14:44:29.272: WARN/System.err(14718): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
08-01 14:44:29.272: WARN/System.err(14718): at android.net.http.AndroidHttpClient.execute(AndroidHttpClient.java:243)
08-01 14:44:29.272: WARN/System.err(14718): at com.ZoApps.VTGClient.getResponse(VTGClient.java:59)
08-01 14:44:29.272: WARN/System.err(14718): at com.ZoApps.VTGClient.getAddress(VTGClient.java:139)
08-01 14:44:29.272: WARN/System.err(14718): at com.ZoApps.DataActivity$1.onClick(DataActivity.java:75)
08-01 14:44:29.272: WARN/System.err(14718): at android.view.View.performClick(View.java:2532)
08-01 14:44:29.272: WARN/System.err(14718): at android.view.View$PerformClick.run(View.java:9293)
08-01 14:44:29.272: WARN/System.err(14718): at android.os.Handler.handleCallback(Handler.java:587)
08-01 14:44:29.272: WARN/System.err(14718): at android.os.Handler.dispatchMessage(Handler.java:92)
08-01 14:44:29.272: WARN/System.err(14718): at android.os.Looper.loop(Looper.java:150)
08-01 14:44:29.282: WARN/System.err(14718): at android.app.ActivityThread.main(ActivityThread.java:4277)
08-01 14:44:29.282: WARN/System.err(14718): at java.lang.reflect.Method.invokeNative(Native Method)
08-01 14:44:29.282: WARN/System.err(14718): at java.lang.reflect.Method.invoke(Method.java:507)
08-01 14:44:29.282: WARN/System.err(14718): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-01 14:44:29.282: WARN/System.err(14718): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-01 14:44:29.282: WARN/System.err(14718): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：2)
自Android API 1级以来，DefaultHttpClient（来自org.apache.http.impl.client包）已经存在。 AndroidHttpClient（来自android.net.http.AndroidHttpClient包）仅在Android API等级8之后可用。
然而，最重要的是，AndroidHttpClient不允许在主（通常是GUI）应用程序线程中执行。
点击http://www.intertech.com/Blog/android-defaulthttpclientandroidhttpclient-and-httpparams/
查看详情答案 1 :(得分：1)
我有这个问题。改变你的
androidClientClass = Class.forName("android.net.http.AndroidHttpClient");
进入
androidClientClass = Class.forName("android.net.http.DefaultHttpClient");
已经完成了。
答案 2 :(得分：1)
问题是android不允许从ui线程发送请求：
AndroidHttpClient：
if (Looper.myLooper() != null && Looper.myLooper() == Looper.getMainLooper() ) {
throw new RuntimeException("This thread forbids HTTP requests");
}
您可以在请求之前使用DefaultHttpClient或AsyncTask。
答案 3 :(得分：0)
作为一种快速解决方案，用DefaultHttpClient类替换AndroidHttpClient。虽然这不是一个好的解决方案，但应该有效。