2

我正在尝试使用下面给定的代码使用端口号 8080 在 wamp 的 apache localhost 上发布数据。 

public class postdata extends Activity
{
    Button btnpost;
    EditText txtname,txtsalary;
    TextView lblstatus;
    String hostname;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        this.setContentView(R.layout.main3);
        btnpost=(Button)this.findViewById(R.id.btnpost);
        txtname=(EditText)this.findViewById(R.id.txtname);
        txtsalary=(EditText)this.findViewById(R.id.txtsalary);
        final HttpClient client = new DefaultHttpClient();
        final HttpPost post = new HttpPost("http://127.0.0.1:8080/andy1/script2.php");
        btnpost.setOnClickListener(new View.OnClickListener()
        {

            @Override
            public void onClick(View arg0)
            {
                try
                {
                    List<NameValuePair> pair = new ArrayList<NameValuePair>(2);
                    pair.add(new BasicNameValuePair("txtname",txtname.getText().toString()));
                    pair.add(new BasicNameValuePair("txtsalary",txtsalary.getText().toString()));
                    post.setEntity(new UrlEncodedFormEntity(pair));
                    HttpResponse response = client.execute(post);
                    Toast.makeText(getApplicationContext(), "Record Saved",1000).show();
                }
                 catch (ClientProtocolException e)
                    {
                        // TODO Auto-generated catch block
                    }
                    catch (IOException e)
                    {
                        Toast.makeText(getApplicationContext(), "Error in uploading",1000).show();
                    }
            }
        });
    }

}

每当我在模拟器上运行上述代码时，都会出现以下错误。 

12-03 10:10:51.237: E/AndroidRuntime(281): FATAL EXCEPTION: main
12-03 10:10:51.237: E/AndroidRuntime(281): java.lang.IllegalArgumentException: Host name may not be null
12-03 10:10:51.237: E/AndroidRuntime(281):  at org.apache.http.HttpHost.<init>(HttpHost.java:83)
12-03 10:10:51.237: E/AndroidRuntime(281):  at org.apache.http.impl.client.AbstractHttpClient.determineTarget(AbstractHttpClient.java:497)
12-03 10:10:51.237: E/AndroidRuntime(281):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
12-03 10:10:51.237: E/AndroidRuntime(281):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
12-03 10:10:51.237: E/AndroidRuntime(281):  at demo.network.postdata$1.onClick(postdata.java:65)
12-03 10:10:51.237: E/AndroidRuntime(281):  at android.view.View.performClick(View.java:2408)
12-03 10:10:51.237: E/AndroidRuntime(281):  at android.view.View$PerformClick.run(View.java:8816)
12-03 10:10:51.237: E/AndroidRuntime(281):  at android.os.Handler.handleCallback(Handler.java:587)
12-03 10:10:51.237: E/AndroidRuntime(281):  at android.os.Handler.dispatchMessage(Handler.java:92)
12-03 10:10:51.237: E/AndroidRuntime(281):  at android.os.Looper.loop(Looper.java:123)
12-03 10:10:51.237: E/AndroidRuntime(281):  at android.app.ActivityThread.main(ActivityThread.java:4627)
12-03 10:10:51.237: E/AndroidRuntime(281):  at java.lang.reflect.Method.invokeNative(Native Method)
12-03 10:10:51.237: E/AndroidRuntime(281):  at java.lang.reflect.Method.invoke(Method.java:521)
12-03 10:10:51.237: E/AndroidRuntime(281):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-03 10:10:51.237: E/AndroidRuntime(281):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-03 10:10:51.237: E/AndroidRuntime(281):  at dalvik.system.NativeStart.main(Native Method)

我也尝试使用 10.0.0.2 作为 IP 地址，因为它是其他帖子中发布的解决方案之一，但根本不起作用。我已经尝试了很多使用 net 来解决这个错误，但没有成功。

4

3 回答 3

2

For accessing localhost (development sys) you have to use 10.0.2.2 (not 10.0.0.2).

for more information look here

于 2012-12-03T05:33:48.840 回答
1

Unless you are running a Web server in the emulator you need to use the IP address of your development machine. Use ifconfig (Linux, etc.) or ipconfig (Windows) to find out what the address is. Should be something like '192.168.xxx.xxx` for a local network.

Or use 10.0.2.2 to refer to the development machine's loopback interface as suggested in the other answer. Here's the link to the relevant docs for the emulator: http://developer.android.com/tools/devices/emulator.html#networkaddresses

于 2012-12-03T05:21:39.943 回答
0

你可以从互联网上找到 ip ..去http://whatsmyip.net/这个 ip 在你的项目中使用

final HttpPost post = new HttpPost("http:// ip :8080/andy1/script2.php");

于 2012-12-03T05:21:21.753 回答