無法獲得PHP腳本的結果

我有一個PHP腳本應該從我的數據庫返回一個ID的小列表，它在瀏覽器中正常工作，但是當我嘗試在我的應用程序中執行它時，出現錯誤。無法獲得PHP腳本的結果

這裏是我的代碼：

public static String makeCall(String scriptName) { 
    String address = "http://10.0.2.2/" + scriptName + ".php"; 

    HttpPost httpPost = new HttpPost(address); 
    HttpClient httpClient = new DefaultHttpClient(); 
    StringBuilder total = new StringBuilder(); 
    try { 
     //httpPost.setEntity(new UrlEncodedFormEntity(params)); 

     // Execute HTTP Post Request 
     HttpResponse response = httpClient.execute(httpPost); 
     InputStream is = response.getEntity().getContent(); 
     BufferedReader rd = new BufferedReader(new InputStreamReader(is)); 
     String line = ""; 
     // Read response until the end 
     while ((line = rd.readLine()) != null) { 
      total.append(line); 
     } 

     // Return full string 
     //System.out.println(total.toString()); 

     return total.toString(); 
    } catch (Exception e) { 
     System.out.println(total == null ? "null" : "notnull"); 
     Log.d("error", e.getMessage()); 
     Log.e("main", "connection error"); 
    } 
    return "empty"; 
}

堆棧跟蹤：

02-24 19:30:08.583: I/System.out(1220): notnull 02-24 19:30:08.594: 
D/AndroidRuntime(1220): Shutting down VM 02-24 19:30:08.594: 
W/dalvikvm(1220): threadid=1: thread exiting with uncaught exception 
(group=0x40a70930) 

E/AndroidRuntime(1220): FATAL EXCEPTION: main 

java.lang.RuntimeException: Unable to start activity 

ComponentInfo{com.example.phptest/com.example.phptest.MainActivity}: 

java.lang.NullPointerException: println needs a message 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
at android.app.ActivityThread.access$600(ActivityThread.java:141) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:137)  
at android.app.ActivityThread.main(ActivityThread.java:5039) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:511)  
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
at dalvik.system.NativeStart.main(Native Method)  

Caused by: java.lang.NullPointerException: 
println needs a message  
at android.util.Log.println_native(Native Method)  
at android.util.Log.d(Log.java:138) 
at com.example.phptest.MainActivity.makeCall(MainActivity.java:61) 
at com.example.phptest.MainActivity.onCreate(MainActivity.java:25) 
at android.app.Activity.performCreate(Activity.java:5104) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
... 11 more

當我刪除的日誌報表或檢查它們是否爲空第一次，我收到以下錯誤：

02-24 20:29:27.523: E/ActivityThread(648): Service 
com.android.exchange.ExchangeService has leaked ServiceConnection 
[email protected]0ce98 
that was originally bound here 

E/ActivityThread(648): android.app.ServiceConnectionLeaked: Service 
com.android.exchange.ExchangeService has leaked ServiceConnection 
[email protected]0ce98 

that was originally bound here  

at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:969) 
at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863) 
at android.app.ContextImpl.bindService(ContextImpl.java:1418) 
at android.app.ContextImpl.bindService(ContextImpl.java:1407) 
at android.content.ContextWrapper.bindService(ContextWrapper.java:473) 
at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157) 
at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:145) 
at com.android.emailcommon.service.ServiceProxy.test(ServiceProxy.java:191) 
at com.android.exchange.ExchangeService$7.run(ExchangeService.java:1850) 
at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:551) 
at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:549) 
at android.os.AsyncTask$2.call(AsyncTask.java:287)  
at java.util.concurrent.FutureTask.run(FutureTask.java:234) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) 
at java.lang.Thread.run(Thread.java:856)

來源

2013-02-24 TomSelleck

更改

Log.d("error", e.getMessage());

去

if (e.getMessage() != null) { 
    Log.d("error", e.getMessage()); 
}

來源

2013-02-24 19:53:54 user000001

無法獲得PHP腳本的結果

回答

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