Question

我正在尝试从JSON web api获取数据。 api的URL包括ID号。如果URL具有ID号，则代码正在运行。我想要的是用户在edittext中输入ID号，然后将其添加到主URL。如果我喜欢String URL = "http://103.8.127.248:1002/serv1/Service1.svc/getassignedstaff/" + EditTextValue;，则进度加载器会在app打开时展开，然后没有显示结果。此外（在主代码中）结果（ID的名称，移动电话和电子邮件）在textview中显示为组合。可以用3种不同的edittext显示吗？

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example_load_list.Load_List$PlaceholderFragment" >

   
   <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="TextView" 
        android:textSize="20sp"/>

   <EditText
       android:id="@+id/editText1"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_alignParentLeft="true"
       android:layout_alignParentRight="true"
       android:layout_below="@+id/tv"
       android:layout_marginTop="37dp"
       android:ems="10"
       android:hint="Enter Booking ID"
       android:inputType="phone" />
 
</RelativeLayout>

public class Load_List extends Activity {

 	ArrayList<String> AD_C_List;
	ProgressDialog P_Dialog_TR;
	ArrayAdapter<String> ARR;
	AutoCompleteTextView AV;
	TextView TV;
    EditText ed1;
		
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.fragment_load_list);
		 
		TV  = (TextView)findViewById(R.id.tv);
		//ed1 = (EditText)findViewById(R.id.editText1);
		
		String URL = "http://103.8.127.248:1002/serv1/Service1.svc/getassignedstaff/51610002"; 

		
		loading_data(URL);	
		
		}
	
	 private void loading_data(String url) {
		// TODO Auto-generated method stub		
		
		
		AD_C_List = new ArrayList<String>();		
		 
		P_Dialog_TR = new ProgressDialog(Load_List.this);
		P_Dialog_TR.setMessage("Fetching Data...");
		P_Dialog_TR.setCancelable(true);
		P_Dialog_TR.show();
		
		RequestParams params = new RequestParams();
	
		AsyncHttpClient client = new AsyncHttpClient();
				
		client.get(url, params, new JsonHttpResponseHandler() {	
			 
			
			public void onFailure(int statusCode, Throwable e,
					JSONObject errorResponse) {
				// TODO Auto-generated method stub
				//super.onFailure(statusCode, e, errorResponse);
				//This will called on 4xx HTTP error
				Toast.makeText(getApplicationContext(), "No data", Toast.LENGTH_SHORT).show();

				System.out.println("Status Code ::: "+ statusCode);
				System.out.println("Error Response ::: "+ errorResponse); 
			}
		
		
		@Override
		public void onSuccess(int statusCode,
				org.apache.http.Header[] headers, final JSONObject response) {

			// TODO Auto-generated method stub
//			super.onSuccess(statusCode, headers, response);

			System.out.println("Success Response ::: "+response);
			 
		
			P_Dialog_TR.dismiss();
		            	 try {
					
						 
		            		 	JSONObject jsonObject = response.getJSONObject("GetAssignedStaffResult");
								String e_name = jsonObject.getString("EMAIL");
								String m_name = jsonObject.getString("MOBILE");		
								String u_name = jsonObject.getString("UserName");		
							 								
								String final_txt = " Email: "+e_name+"\n Mobile :"+m_name+"\n Username :"+u_name;
								 									
								System.out.println("JSON Object: "+jsonObject);
								
								Log.d("Email : ",jsonObject.getString("EMAIL"));
								Log.i("Mobile :",jsonObject.getString("MOBILE"));
								Log.i("Username :",jsonObject.getString("UserName"));
								 								
								
								for (int i = 0; i < AD_C_List.size(); i++) { 
									
								String item = AD_C_List.get(i);
								Log.i("Array List",item);
								}
								//Toast.makeText(getApplicationContext(), u_name, Toast.LENGTH_SHORT).show();
								populate_TV(final_txt);
						
							
						} catch (JSONException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
		            	
		              }		         
		   	
			});
		
	 }
		
	 public void populate_TV(String C_List) {
	 
				TV.setText(C_List);
	}	
	
}

Answer 1

您的基本网址应如下所示：

String baseURL = "http://103.8.127.248:1002/serv1/Service1.svc/getassignedstaff/";

当您从editText检索用户输入的值时，请在开始阅读JSON之前检查它是否为空

if (ed1.getText().toString().matches("")) {
    // prompt the user to tell that the edittext is empty
} else {
    String url = baseURL + ed1.getText().toString();
    // ans start reading your JSON
}

Answer 2

我试过，String URL = “http://103.8.127.248:1002/serv1/Service1.svc/getassignedstaff/”+ ED1; （其中Ed1是edittext对象）

这并不奇怪。 Edittext实例不代表其中的文本。它将为您提供有关它的类的信息，例如实例ID而不是其中的文本。这就是方法toString（）要查看它现在传递给url的内容，只需添加类似

的内容即可

Toast.makeText(Load_List.this, URL, Toast.LENGTH_SHORT).show();

行后

String URL = "http://103.8.127.248:1002/serv1/Service1.svc/getassignedstaff/" +Ed1;

为了使它成功，你需要使用

String URL = "http://103.8.127.248:1002/serv1/Service1.svc/getassignedstaff/" +Ed1.getText().toString();

JSON解析不适用于edittext

2 个答案: