Android try-catch语句后没有错误，但不会执行任何操作

我正在尝试使用web服务显示数据。代码没有给出错误，但单击按钮时，执行仅发生在try部分，除此之外没有执行任何内容

try {
                 Toast.makeText(getApplicationContext(), "You r in try", Toast.LENGTH_LONG).show();
                HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
                //this is the actual part that will call the webservice
                androidHttpTransport.call(SOAP_ACTION1, envelope);                
                // Get the SoapResult from the envelope body.
                SoapObject result = (SoapObject)envelope.bodyIn;
               //from here nothing executes but gives no error
                ****if(result != null**)
                {
                    Toast.makeText(getApplicationContext(), "You r in if", Toast.LENGTH_LONG).show();
                      //Get the first property and change the label text
                      tv1.setText(result.getProperty(0).toString());     
                }
                else
                {
                      Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
                }
          } catch (Exception e) {
                e.printStackTrace();
          }                         
        }
    });

---

您正在调用的几个方法抛出异常

try {
                 Toast.makeText(getApplicationContext(), "You r in try", Toast.LENGTH_LONG).show();
                HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
                //this is the actual part that will call the webservice
                androidHttpTransport.call(SOAP_ACTION1, envelope);                
                // Get the SoapResult from the envelope body.
                SoapObject result = (SoapObject)envelope.bodyIn;
               //from here nothing executes but gives no error
                ****if(result != null**)
                {
                    Toast.makeText(getApplicationContext(), "You r in if", Toast.LENGTH_LONG).show();
                      //Get the first property and change the label text
                      tv1.setText(result.getProperty(0).toString());     
                }
                else
                {
                      Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
                }
          } catch (Exception e) {
                e.printStackTrace();
          }                         
        }
    });

“跳过”代码表示抛出了异常

try {
                 Toast.makeText(getApplicationContext(), "You r in try", Toast.LENGTH_LONG).show();
                HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
                //this is the actual part that will call the webservice
                androidHttpTransport.call(SOAP_ACTION1, envelope);                
                // Get the SoapResult from the envelope body.
                SoapObject result = (SoapObject)envelope.bodyIn;
               //from here nothing executes but gives no error
                ****if(result != null**)
                {
                    Toast.makeText(getApplicationContext(), "You r in if", Toast.LENGTH_LONG).show();
                      //Get the first property and change the label text
                      tv1.setText(result.getProperty(0).toString());     
                }
                else
                {
                      Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
                }
          } catch (Exception e) {
                e.printStackTrace();
          }                         
        }
    });

---

在catch块中放一个祝酒词以确认。

您是否尝试过祝酒结果？？？您得到了什么？请清理您的项目并重试。也不要用吐司。使用Log.i（“标记”、“您的消息”）；为什么不调试应用程序并在问题区域设置断点呢；上面这行代码并没有被执行，我通过放置toast进行了检查。我有一个更具体的问题：如果你在catch块中放置了toast，你看到那个toast了吗？如果您这样做，则会引发异常。

try {
                 Toast.makeText(getApplicationContext(), "You r in try", Toast.LENGTH_LONG).show();
                HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
                //this is the actual part that will call the webservice
                androidHttpTransport.call(SOAP_ACTION1, envelope);                
                // Get the SoapResult from the envelope body.
                SoapObject result = (SoapObject)envelope.bodyIn;
               //from here nothing executes but gives no error
                ****if(result != null**)
                {
                    Toast.makeText(getApplicationContext(), "You r in if", Toast.LENGTH_LONG).show();
                      //Get the first property and change the label text
                      tv1.setText(result.getProperty(0).toString());     
                }
                else
                {
                      Toast.makeText(getApplicationContext(), "No Response",Toast.LENGTH_LONG).show();
                }
          } catch (Exception e) {
                e.printStackTrace();
          }                         
        }
    });