1

我正在尝试建立最终通过 Web 服务将 Android 应用程序连接到数据库。作为中间步骤，我试图查看是否可以让http://codeoncloud.blogspot.com/2012/07/android-php-web-service-client.html正常工作。但是，当我复制/粘贴它并使用 textview 设置适当的布局文件时，尝试运行它时出现错误。具体来说，我的代码如下所示（我试图从同一台机器上的模拟器运行，因此是 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
4

1 回答 1

0

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");

我强烈推荐使用 nuSOAP PHP 库来创建 SOAP 服务器。也许尝试一些更具体的 Android 客户端，例如这个库：https ://code.google.com/p/droidsoapclient/ 。如果您打算使用 SOAP，那就是... =)

于 2012-11-25T06:43:19.523 回答