我坐了3天，在网上随处可见但是它很有效...每次我尝试在android上发出一个http请求时：它出现了错误：不幸的是，......已经停止了。在这里我的代码：
package sd.s;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
public class SdsdActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Thread trd = new Thread(new Runnable(){
public void run(){
// Creating HTTP client
HttpClient httpClient = new DefaultHttpClient();
// Creating HTTP Post
HttpPost httpPost = new HttpPost(
"http://www.test.com");
// Building post parameters
// key and value pair
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);
nameValuePair.add(new BasicNameValuePair("test", "test"));
nameValuePair.add(new BasicNameValuePair("message",
"Hi, trying Android HTTP post!"));
// Url Encoding the POST parameters
try {
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
} catch (UnsupportedEncodingException e) {
// writing error to Log
e.printStackTrace();
}
// Making HTTP Request
try {
HttpResponse response = httpClient.execute(httpPost);
// writing response to log
Log.d("Http Response:", response.toString());
} catch (ClientProtocolException e) {
// writing exception to log
e.printStackTrace();
} catch (IOException e) {
// writing exception to log
e.printStackTrace();
}
} });
trd.run();
}
}
这是我在LogCat上的输出
02-24 17:53:39.003: D/dalvikvm(516): Not late-enabling CheckJNI (already on)
02-24 17:53:40.293: D/AndroidRuntime(516): Shutting down VM
02-24 17:53:40.304: W/dalvikvm(516): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
02-24 17:53:40.313: E/AndroidRuntime(516): FATAL EXCEPTION: main
02-24 17:53:40.313: E/AndroidRuntime(516): java.lang.RuntimeException: Unable to start activity ComponentInfo{sd.s/sd.s.SdsdActivity}: android.os.NetworkOnMainThreadException
02-24 17:53:40.313: E/AndroidRuntime(516): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
02-24 17:53:40.313: E/AndroidRuntime(516): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
02-24 17:53:40.313: E/AndroidRuntime(516): at android.app.ActivityThread.access$600(ActivityThread.java:123)
02-24 17:53:40.313: E/AndroidRuntime(516): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
02-24 17:53:40.313: E/AndroidRuntime(516): at android.os.Handler.dispatchMessage(Handler.java:99)
02-24 17:53:40.313: E/AndroidRuntime(516): at android.os.Looper.loop(Looper.java:137)
02-24 17:53:40.313: E/AndroidRuntime(516): at android.app.ActivityThread.main(ActivityThread.java:4424)
02-24 17:53:40.313: E/AndroidRuntime(516): at java.lang.reflect.Method.invokeNative(Native Method)
02-24 17:53:40.313: E/AndroidRuntime(516): at java.lang.reflect.Method.invoke(Method.java:511)
02-24 17:53:40.313: E/AndroidRuntime(516): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-24 17:53:40.313: E/AndroidRuntime(516): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-24 17:53:40.313: E/AndroidRuntime(516): at dalvik.system.NativeStart.main(Native Method)
02-24 17:53:40.313: E/AndroidRuntime(516): Caused by: android.os.NetworkOnMainThreadException
02-24 17:53:40.313: E/AndroidRuntime(516): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
02-24 17:53:40.313: E/AndroidRuntime(516): at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
02-24 17:53:40.313: E/AndroidRuntime(516): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
02-24 17:53:40.313: E/AndroidRuntime(516): at java.net.InetAddress.getAllByName(InetAddress.java:220)
02-24 17:53:40.313: E/AndroidRuntime(516): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
02-24 17:53:40.313: E/AndroidRuntime(516): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
02-24 17:53:40.313: E/AndroidRuntime(516): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
02-24 17:53:40.313: E/AndroidRuntime(516): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
02-24 17:53:40.313: E/AndroidRuntime(516): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
02-24 17:53:40.313: E/AndroidRuntime(516): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
02-24 17:53:40.313: E/AndroidRuntime(516): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
02-24 17:53:40.313: E/AndroidRuntime(516): at sd.s.SdsdActivity.onCreate(SdsdActivity.java:52)
02-24 17:53:40.313: E/AndroidRuntime(516): at android.app.Activity.performCreate(Activity.java:4465)
02-24 17:53:40.313: E/AndroidRuntime(516): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
02-24 17:53:40.313: E/AndroidRuntime(516): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
02-24 17:53:40.313: E/AndroidRuntime(516): ... 11 more
02-24 17:59:31.783: D/AndroidRuntime(584): Shutting down VM
02-24 17:59:31.783: W/dalvikvm(584): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
02-24 17:59:31.793: E/AndroidRuntime(584): FATAL EXCEPTION: main
02-24 17:59:31.793: E/AndroidRuntime(584): java.lang.RuntimeException: Unable to start activity ComponentInfo{sd.s/sd.s.SdsdActivity}: android.os.NetworkOnMainThreadException
02-24 17:59:31.793: E/AndroidRuntime(584): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
02-24 17:59:31.793: E/AndroidRuntime(584): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
02-24 17:59:31.793: E/AndroidRuntime(584): at android.app.ActivityThread.access$600(ActivityThread.java:123)
02-24 17:59:31.793: E/AndroidRuntime(584): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
02-24 17:59:31.793: E/AndroidRuntime(584): at android.os.Handler.dispatchMessage(Handler.java:99)
02-24 17:59:31.793: E/AndroidRuntime(584): at android.os.Looper.loop(Looper.java:137)
02-24 17:59:31.793: E/AndroidRuntime(584): at android.app.ActivityThread.main(ActivityThread.java:4424)
02-24 17:59:31.793: E/AndroidRuntime(584): at java.lang.reflect.Method.invokeNative(Native Method)
02-24 17:59:31.793: E/AndroidRuntime(584): at java.lang.reflect.Method.invoke(Method.java:511)
02-24 17:59:31.793: E/AndroidRuntime(584): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-24 17:59:31.793: E/AndroidRuntime(584): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-24 17:59:31.793: E/AndroidRuntime(584): at dalvik.system.NativeStart.main(Native Method)
02-24 17:59:31.793: E/AndroidRuntime(584): Caused by: android.os.NetworkOnMainThreadException
02-24 17:59:31.793: E/AndroidRuntime(584): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
02-24 17:59:31.793: E/AndroidRuntime(584): at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
02-24 17:59:31.793: E/AndroidRuntime(584): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
02-24 17:59:31.793: E/AndroidRuntime(584): at java.net.InetAddress.getAllByName(InetAddress.java:220)
02-24 17:59:31.793: E/AndroidRuntime(584): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
02-24 17:59:31.793: E/AndroidRuntime(584): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
02-24 17:59:31.793: E/AndroidRuntime(584): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
02-24 17:59:31.793: E/AndroidRuntime(584): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
02-24 17:59:31.793: E/AndroidRuntime(584): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
02-24 17:59:31.793: E/AndroidRuntime(584): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
02-24 17:59:31.793: E/AndroidRuntime(584): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
02-24 17:59:31.793: E/AndroidRuntime(584): at sd.s.SdsdActivity$1.run(SdsdActivity.java:53)
02-24 17:59:31.793: E/AndroidRuntime(584): at java.lang.Thread.run(Thread.java:856)
02-24 17:59:31.793: E/AndroidRuntime(584): at sd.s.SdsdActivity.onCreate(SdsdActivity.java:66)
02-24 17:59:31.793: E/AndroidRuntime(584): at android.app.Activity.performCreate(Activity.java:4465)
02-24 17:59:31.793: E/AndroidRuntime(584): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
02-24 17:59:31.793: E/AndroidRuntime(584): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
02-24 17:59:31.793: E/AndroidRuntime(584): ... 11 more
02-24 18:08:12.242: D/AndroidRuntime(626): Shutting down VM
02-24 18:08:12.242: W/dalvikvm(626): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
02-24 18:08:12.262: E/AndroidRuntime(626): FATAL EXCEPTION: main
02-24 18:08:12.262: E/AndroidRuntime(626): java.lang.RuntimeException: Unable to start activity ComponentInfo{sd.s/sd.s.SdsdActivity}: android.os.NetworkOnMainThreadException
02-24 18:08:12.262: E/AndroidRuntime(626): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
02-24 18:08:12.262: E/AndroidRuntime(626): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
02-24 18:08:12.262: E/AndroidRuntime(626): at android.app.ActivityThread.access$600(ActivityThread.java:123)
02-24 18:08:12.262: E/AndroidRuntime(626): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
02-24 18:08:12.262: E/AndroidRuntime(626): at android.os.Handler.dispatchMessage(Handler.java:99)
02-24 18:08:12.262: E/AndroidRuntime(626): at android.os.Looper.loop(Looper.java:137)
02-24 18:08:12.262: E/AndroidRuntime(626): at android.app.ActivityThread.main(ActivityThread.java:4424)
02-24 18:08:12.262: E/AndroidRuntime(626): at java.lang.reflect.Method.invokeNative(Native Method)
02-24 18:08:12.262: E/AndroidRuntime(626): at java.lang.reflect.Method.invoke(Method.java:511)
02-24 18:08:12.262: E/AndroidRuntime(626): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-24 18:08:12.262: E/AndroidRuntime(626): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-24 18:08:12.262: E/AndroidRuntime(626): at dalvik.system.NativeStart.main(Native Method)
02-24 18:08:12.262: E/AndroidRuntime(626): Caused by: android.os.NetworkOnMainThreadException
02-24 18:08:12.262: E/AndroidRuntime(626): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
02-24 18:08:12.262: E/AndroidRuntime(626): at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
02-24 18:08:12.262: E/AndroidRuntime(626): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
02-24 18:08:12.262: E/AndroidRuntime(626): at java.net.InetAddress.getAllByName(InetAddress.java:220)
02-24 18:08:12.262: E/AndroidRuntime(626): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
02-24 18:08:12.262: E/AndroidRuntime(626): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
02-24 18:08:12.262: E/AndroidRuntime(626): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
02-24 18:08:12.262: E/AndroidRuntime(626): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
02-24 18:08:12.262: E/AndroidRuntime(626): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
02-24 18:08:12.262: E/AndroidRuntime(626): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
02-24 18:08:12.262: E/AndroidRuntime(626): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
02-24 18:08:12.262: E/AndroidRuntime(626): at sd.s.SdsdActivity$1.run(SdsdActivity.java:53)
02-24 18:08:12.262: E/AndroidRuntime(626): at java.lang.Thread.run(Thread.java:856)
02-24 18:08:12.262: E/AndroidRuntime(626): at sd.s.SdsdActivity.onCreate(SdsdActivity.java:66)
02-24 18:08:12.262: E/AndroidRuntime(626): at android.app.Activity.performCreate(Activity.java:4465)
02-24 18:08:12.262: E/AndroidRuntime(626): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
02-24 18:08:12.262: E/AndroidRuntime(626): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
02-24 18:08:12.262: E/AndroidRuntime(626): ... 11 more
也许我是愚蠢的但是从3天开始我试图让它运行，应用程序启动，但每次启动后停止... 许可互联网完成，防火墙是np＆gt;模拟器中的WebBrowser也可以，有什么问题？请 - 非常感谢您的每一个答案！
答案 0 :(得分：2)
您正在主线程上执行Thread对象的run（）方法。替换这个：
trd.run();
用这个：
trd.start();
答案 1 :(得分：2)
从Android 3.0开始，您无法在主线程上执行此类请求。
NetworkOnMainThreadException
课程概述
应用程序尝试在其主线程上执行网络操作时引发的异常。
仅针对Honeycomb SDK或更高版本的应用程序进行此操作。针对早期SDK版本的应用程序可以在其主要事件循环线程上进行网络连接，但是非常不鼓励这样做。请参阅文档设计响应性。
另见StrictMode。
有关构建响应式应用程序的指南，请参阅http://developer.android.com/guide/practices/design/responsiveness.html。
答案 2 :(得分：0)
从您的日志中，看起来错误是android.os.NetworkOnMainThreadException。从http://developer.android.com/reference/android/os/NetworkOnMainThreadException.html开始，听起来错误的是您正在尝试在主线程中进行网络操作。由于这可能会使您的UI无响应，因此不鼓励。而且由于你似乎在严格的模式下运行（http://developer.android.com/reference/android/os/StrictMode.html），它正在崩溃应用程序。
此外，您应该调用trd.start（）而不是trd.run（）