Android的：不能发送HTTP POST [英] Android: Can not send http post
问题描述
我一直在敲打我的头试图找出如何在Android的发个帖子的方法。这是我的code是这样的：
I've been banging my head trying to figure out how to send a post method in Android. This is how my code look like:
public class HomeActivity extends Activity implements OnClickListener {
private TextView textView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textView = (TextView) findViewById(R.id.text);
Button button = (Button)findViewById(R.id.button);
button.setOnClickListener(this);
}
@Override
public void onClick(View view) {
HttpPost httpMethod = new HttpPost("http://www.example.com/");
httpMethod.addHeader("Accept", "text/html");
httpMethod.addHeader("Content-Type", "application/xml");
AndroidHttpClient client = AndroidHttpClient.newInstance("Android");
String result = null;
try {
HttpResponse response = client.execute(httpMethod);
textView.setText(response.toString());
HttpEntity entity = response.getEntity();
Log.i(HomeActivity.class.toString(), result);
textView.setText("Invoked webservice");
} catch (IOException e) {
e.printStackTrace();
Log.e(HomeActivity.class.toString(), e.getMessage());
textView.setText("Something wrong:" + e.getMessage());
}
}
}
这是我得到的异常：
I/ARMAssembler( 59): generated scanline__00000177:03515104_00001001_00000000 [
91 ipp] (114 ins) at [0x334348:0x334510] in 1430659 ns
W/System.err( 272): java.net.UnknownHostException: www.example.com
W/System.err( 272): at java.net.InetAddress.lookupHostByName(InetAddress.jav
a:513)
W/System.err( 272): at java.net.InetAddress.getAllByNameImpl(InetAddress.jav
a:278)
W/System.err( 272): at java.net.InetAddress.getAllByName(InetAddress.java:24
2)
W/System.err( 272): at org.apache.http.impl.conn.DefaultClientConnectionOper
ator.openConnection(DefaultClientConnectionOperator.java:136)
W/System.err( 272): at org.apache.http.impl.conn.AbstractPoolEntry.open(Abst
ractPoolEntry.java:164)
W/System.err( 272): at org.apache.http.impl.conn.AbstractPooledConnAdapter.o
pen(AbstractPooledConnAdapter.java:119)
W/System.err( 272): at org.apache.http.impl.client.DefaultRequestDirector.ex
ecute(DefaultRequestDirector.java:348)
W/System.err( 272): at org.apache.http.impl.client.AbstractHttpClient.execut
e(AbstractHttpClient.java:555)
W/System.err( 272): at org.apache.http.impl.client.AbstractHttpClient.execut
e(AbstractHttpClient.java:487)
W/System.err( 272): at org.apache.http.impl.client.AbstractHttpClient.execut
e(AbstractHttpClient.java:465)
W/System.err( 272): at android.net.http.AndroidHttpClient.execute(AndroidHtt
pClient.java:243)
W/System.err( 272): at com.collaboapp.android.HomeActivity.onClick(HomeActiv
ity.java:152)
W/System.err( 272): at android.view.View.performClick(View.java:2408)
W/System.err( 272): at android.view.View$PerformClick.run(View.java:8816)
W/System.err( 272): at android.os.Handler.handleCallback(Handler.java:587)
W/System.err( 272): at android.os.Handler.dispatchMessage(Handler.java:92)
W/System.err( 272): at android.os.Looper.loop(Looper.java:123)
W/System.err( 272): at android.app.ActivityThread.main(ActivityThread.java:4
627)
W/System.err( 272): at java.lang.reflect.Method.invokeNative(Native Method)
W/System.err( 272): at java.lang.reflect.Method.invoke(Method.java:521)
W/System.err( 272): at com.android.internal.os.ZygoteInit$MethodAndArgsCalle
r.run(ZygoteInit.java:868)
W/System.err( 272): at com.android.internal.os.ZygoteInit.main(ZygoteInit.ja
va:626)
W/System.err( 272): at dalvik.system.NativeStart.main(Native Method)
E/class android.HomeActivity( 272): www.example.com
D/ThrottleService( 59): finally have imsi - retreiving data
D/ThrottleService( 59): onPollAlarm - roaming =false, read =0, written =0, new
total =0
D/SntpClient( 59): request time failed: java.net.SocketException: Address fami
ly not supported by protocol
我在做什么错在这里？有什么，我可能需要从Android模拟器配置得到这个工作？
What am I doing wrong here? Is there anything that I may need to configure from the Android emulator to get this working?
感谢您的帮助。
推荐答案
似乎AndroidHttpClient负责该异常。你的榜样将工作
it seems that AndroidHttpClient is responsible for that exception. Your example will work
- 如果使用设置互联网persmission的建议
- 更换AndroidHttpClient'与'DefaultHttpClient
- 删除行Log.i（HomeActivity.class.toString（），结果）;因为结果是空
这是我不明白为什么这个类不工作，excpected，也许有人可以解释。此线程讨论的问题太多，但也没有交代为什么code失败：<一href="http://groups.google.de/group/android-developers/browse_thread/thread/cc59efb9475ac557/81116369f2c6bd7a?hl=de&lnk=gst&q=This+thread+forbids+HTTP+requests#81116369f2c6bd7a">http://groups.google.de/group/android-developers/browse_thread/thread/cc59efb9475ac557/81116369f2c6bd7a?hl=de&lnk=gst&q=This+thread+forbids+HTTP+requests#81116369f2c6bd7a.
It is not clear to me why this class does not work as excpected, maybe somebody could explain. This thread discussed the problem too but there is also no explaination why the code fails: http://groups.google.de/group/android-developers/browse_thread/thread/cc59efb9475ac557/81116369f2c6bd7a?hl=de&lnk=gst&q=This+thread+forbids+HTTP+requests#81116369f2c6bd7a.
这篇关于Android的：不能发送HTTP POST的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
