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我正在使用 WAMP 服务器。我在服务器上有一个 db_connect.php 文件。我从通过 USB 电缆连接到计算机的 android 设备对该文件发出 http 请求。

但是，每次我请求文件时，都会出现以下错误：

连接 org.apache.http.conn.HttpHostConnectException 中的错误：与http://xxxx的连接被拒绝

有谁知道我可能做错了什么？我的桌面在我的家庭宽带上运行 WAMP，我的平板电脑连接到我的家庭宽带。

如果我将发布请求更改为联系 www.google.com，我会建立连接。有什么建议么？

MainActivity - 我尝试连接的地方：

public class MainActivity extends Activity {

Button b1;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    b1 = (Button)findViewById(R.id.button1);
    b1.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            new HTTPTask().execute();
        }
    });
}

private class HTTPTask extends AsyncTask<String, Void, Boolean>{

    @Override
    protected Boolean doInBackground(String... params) {

        //location of file to retrieve
        String url = "http://192.168.x.xx/emenu/db_connect.php";
        ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();


        try{
            HttpClient httpclient = new DefaultHttpClient();

            HttpPost httppost = new HttpPost(url);

            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            httpclient.execute(httppost);
            return true;
        }catch(Exception e){
            Log.e("log_tag", "Error in Connection " + e.toString());
            return false;
        }

    }

    @Override
    protected void onPostExecute(Boolean result) {
        super.onPostExecute(result);
        if(result){
            Toast.makeText(getApplicationContext(), "Connection Established!", Toast.LENGTH_SHORT).show();
        }else{
            Toast.makeText(getApplicationContext(), "Connection Failed!", Toast.LENGTH_SHORT).show();
        }
    }



    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        Toast.makeText(getApplicationContext(), "Connection initiating...", Toast.LENGTH_SHORT).show();
    }

}

}

显现：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.dbconnectiontest"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="15" />

<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />


<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/title_activity_main" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

4

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