Question

我在计时器操作中有一些ksoap网络服务，如果我做得好的话，每半小时工作一次。其中一个将整个表行发送到sql server，然后它转为0或1取决于正确发送。如果返回1，则必须从sqlite中删除所有行。它返回1，它没有进入if语句并且不起作用delete命令。我不知道我的计时器和线程是正确的方法，我怎么能正确地做到这一点？

守则：

 try
       { 
           final Timer V_Timer;
           final Handler V_Handler;
           V_Timer = new Timer();
           V_Handler = new Handler(Looper.getMainLooper());  
             V_Timer.scheduleAtFixedRate(new TimerTask()
             {
              public void run()
              {                
                  V_Handler.post(new Runnable()
               {
                public void run()
                {   
                 //for status update//
                     if(isConnected()){                
                    Thread networkThread = new Thread() {
                    @Override
                    public void run() {

                      try {
                          SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME_STATUS); 

                            request.addProperty("MH_ID",hardwareID);
                            request.addProperty("Latitude",V_Latitude);
                            request.addProperty("Longitude",V_Longitude);


                         SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
                         envelope.dotNet = true;
                         envelope.setOutputSoapObject(request);

                         HttpTransportSE ht = new HttpTransportSE(URL);
                         ht.call(SOAP_ACTION_STATUS, envelope);
                         final  SoapPrimitive response = (SoapPrimitive)envelope.getResponse();
                         final String str_ = response.toString();
                         //final String str = response.toString()+"\n"+ V_Latitude +"\n"+V_Longitude;

                         runOnUiThread (new Runnable(){ 
                     public void run() { 
                         Toast.makeText(MainActivity.this, str_, Toast.LENGTH_LONG).show();
                     }
                         });
                        }
                        catch (Exception e) {
                            e.printStackTrace();
                        }
                       }
                     };
                     networkThread.start();

                     //Insert Bulk//

                     if(isConnected()){                
                            Thread networkThread2 = new Thread() {
                            @Override
                            public void run() {
                                str = "0";

                              try {
                                    StringBuilder bulk = GetTotalRecord();  
                                    bulkinsert = bulk.toString();
                                  SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME_BULK); 

                                    request.addProperty("Insert_Bulk",bulkinsert);                                                                      

                                 SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
                                 envelope.dotNet = true;
                                 envelope.setOutputSoapObject(request);

                                 HttpTransportSE ht = new HttpTransportSE(URL);
                                 ht.call(SOAP_ACTION_BULK, envelope);
                                 final  SoapPrimitive response = (SoapPrimitive)envelope.getResponse();
                                 str = response.toString(); 


                                 runOnUiThread (new Runnable(){ 
                             public void run() { 
                                // Toast.makeText(MainActivity.this, str, Toast.LENGTH_LONG).show();
                                /////delete sqlite table/////

                                 Log.d("str", str);

                                   if (str=="1")
                                 {
                                     try {
                                            dbobject.delete(SQLiteDB.TABLE_NAME_S, null, null);
                                            Toast.makeText(MainActivity.this, "All Answers sent", Toast.LENGTH_LONG).show() ;
                                        } catch (Exception e) {
                                            // TODO Auto-generated catch block
                                            Toast.makeText(MainActivity.this, "Error: Answers could not send \n "+e.toString(), Toast.LENGTH_LONG).show();
                                            e.printStackTrace();
                                        }
                                     finally{
                                        sqlitedb.close();
                                    }   
                                 }

                                 /////delete sqlite table/////

                             }
                                 });
                                }
                                catch (Exception e) {
                                    e.printStackTrace();
                                }
                               }
                             };
                             networkThread2.start();


                     //Insert Bulk end//                                                         

                }
                }
               }});
              }
             },10000, 1000*60*30);           
                    }       
       catch(Exception ex)
       {     

       }

Answer 1

 if (str=="1")

您无法在String中以这种方式比较Java。

您应该使用equalsTo()或将str转换为int

例如：

if (str.equalsTo("1")) {
}

或

int strInt = Integer.parseInt( str )

if (strInt == 1) {
}

我在哪里可以将IF语句用于工作？

1 个答案: