Android PHP连接错误

Question

我试图建立起来，最终通过web服务将Android应用程序连接到数据库。作为一个中间步骤，我试图看看我能否正常工作。但是，当我复制/粘贴并使用textview设置适当的布局文件时，尝试运行时出现错误。具体来说，我的代码如下所示（我试图从同一台机器上的仿真器运行，因此10.0.2.2）任何指针将不胜感激！

package com.example.componenttest; 

import android.app.Activity; 
import android.os.Bundle; 
import java.io.IOException; 
import android.widget.TextView; 
import org.apache.http.HttpResponse; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.util.EntityUtils; 

public class AndroidWebActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     HttpClient httpclient = new DefaultHttpClient(); 
     HttpPost httppost = new HttpPost("10.0.2.2/InterfaceTest/GrabMe.php"); 
     try { 
      TextView tv = (TextView) findViewById(R.id.tv1); 
     //tv.setText("CHANGED TEXT"); 
      HttpResponse response = httpclient.execute(httppost); 
      final String str = EntityUtils.toString(response.getEntity()); 
      tv.setText(str); 
     } 
     catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 
} 

我的错误日志如下所示：

11-24 22:30:14.976: D/dalvikvm(7269): GC_EXTERNAL_ALLOC freed 53K, 48% free 2807K/5379K, external 1687K/2079K, paused 221ms 
11-24 22:30:17.890: D/AndroidRuntime(7269): Shutting down VM 
11-24 22:30:17.890: W/dalvikvm(7269): threadid=1: thread exiting with uncaught exception (group=0x4001e578) 
11-24 22:30:17.921: E/AndroidRuntime(7269): FATAL EXCEPTION: main 
11-24 22:30:17.921: E/AndroidRuntime(7269): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.componenttest/com.example.componenttest.AndroidWebActivity}: java.lang.IllegalStateException: Target host must not be null, or set in parameters. 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at android.os.Handler.dispatchMessage(Handler.java:99) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at android.os.Looper.loop(Looper.java:130) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at android.app.ActivityThread.main(ActivityThread.java:3687) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at java.lang.reflect.Method.invokeNative(Native Method) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at java.lang.reflect.Method.invoke(Method.java:507) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at dalvik.system.NativeStart.main(Native Method) 
11-24 22:30:17.921: E/AndroidRuntime(7269): Caused by: java.lang.IllegalStateException: Target host must not be null, or set in parameters. 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at org.apache.http.impl.client.DefaultRequestDirector.determineRoute(DefaultRequestDirector.java:572) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:292) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at com.example.componenttest.AndroidWebActivity.onCreate(AndroidWebActivity.java:24) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615) 
11-24 22:30:17.921: E/AndroidRuntime(7269):  ... 11 more 

Answer 1

尝试改变

HttpPost httppost = new HttpPost("10.0.2.2/InterfaceTest/GrabMe.php"); 

到

HttpPost httppost = new HttpPost("http://10.0.2.2/InterfaceTest/GrabMe.php"); 

---

我高我建议使用nuSOAP PHP库来创建一个SOAP服务器。也许可以尝试一些更具体的Android客户端，比如这个库：https://code.google.com/p/droidsoapclient/。如果您打算使用的SOAP是...... =）