EDITTEXT内容显示为零

我在做一个应用程序，我需要从用户采取投入和追加该输入以字符串，并以此作为数据解析但编辑文本内容为空，即使一个网址我我在的EditText 输入文本我转换的EditText内容串如下EDITTEXT内容显示为零

EditText edit = (EditText)findViewById(R.Id.tv5);

而且里面onclicklistener

String data = edit.getText().toString();

任何人能告诉我为什么data.length()是给我为零？我的完整的主要活动是如下：

public class Pnr extends Activity { 
EditText edit; 
TextView text1; 
Button button; 
String pnr, check; 
HttpClient client; 
JSONObject json; 
int s; 
String URL = "pnrbuddy.com/pnrstatus="; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    setContentView(R.layout.activity_pnr); 
    edit = (EditText) findViewById(R.id.tv5); 
    text1 = (TextView) findViewById(R.id.textView2); 
    button = (Button) findViewById(R.id.button1); 
    client = new DefaultHttpClient(); 
    pnr = String.valueOf(edit.getText()); 
    s = pnr.length(); 

    button.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      new Read().execute("trainNo"); 

     } 
    }); 
} 

public JSONObject pnrStatus(String key) throws ClientProtocolException, 
     IOException, JSONException { 
    StringBuilder url = new StringBuilder(URL); 
    url.append(key); 
    HttpGet get = new HttpGet(url.toString()); 
    HttpResponse r = client.execute(get); 
    int status = r.getStatusLine().getStatusCode(); 
    JSONObject last = new JSONObject(); 
    if (status == 200) { 
     HttpEntity e = r.getEntity(); 
     String data = EntityUtils.toString(e); 
     last = new JSONObject(data); 
     return last; 
    } else { 
     return last; 
    } 
} 

public class Read extends AsyncTask<String, Integer, String> { 

    @Override 
    protected String doInBackground(String... arg0) { 
     // TODO Auto-generated method stub 
     try { 
      json = pnrStatus(pnr); 
      return json.getString(arg0[0]); 
     } catch (ClientProtocolException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      return null; 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      return null; 
     } catch (JSONException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      return s + ""; 
     } 
    } 

    @Override 
    protected void onPostExecute(String result) { 
     // TODO Auto-generated method stub 
     text1.setText("    " + result); 

    } 

}

} 当我输入的字符串，而不是从EditText上接受的字符串URL与exsisting串代码工作 URL =“pnrbuddy/pnrstatus =会将myText”一起的; 为什么读音字无法从EDITTEXT得到字符串？

来源

2014-02-28 user3363800

你确定你使用的是正确的ID活动创建不？ –

忘了我的意见..这只是在TextView的类 – donfuxx

什么呢'提供的System.out.println（“您输入：” +数据）;'打印logcat的？ –

尝试用这种

EditText edit = (EditText)findViewById(R.id.tv5); 
String data = edit.getText().toString();

来源

2014-02-28 07:59:47

我试过这个，但它显示零 – user3363800

如果你试图让长在EditTextonclicklistener它会给ü0 only.In这种情况下，尝试从onTextChange得到。 TV5 -

来源

2014-02-28 08:20:27 Yuvaraja

Replace your on create method by this n try 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     setContentView(R.layout.activity_pnr); 
     edit = (EditText) findViewById(R.id.tv5); 
     text1 = (TextView) findViewById(R.id.textView2); 
     button = (Button) findViewById(R.id.button1); 
     client = new DefaultHttpClient(); 


     button.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       pnr =edit.getText().toString(); 
       s = pnr.length(); 
       new Read().execute("trainNo"); 

      } 
     }); 
    }

其实你得到的文本当点击按钮时，所以在放置的onclick方法gettext的代码将解决您的问题

来源

2016-02-12 12:57:19

EDITTEXT内容显示为零

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