如何在android系統與科特林

Question

設置文本，突出重點，誤差在EDITTEXT

我搜索大量互聯網上關於我如何能在與科特林Android的使用上editText(s)setFocusable()，setText()，setError()等等等等方法（我知道的事實，我們可以使用在Java中上述方法），但我無法找到確切的解決方案，將爲我工作。

我使用 1）排球的HTTP調用 2）與版本的Android工作室科特林插件= '1.1.3-2' 3）ANKO庫

我有什麼問題面對應用程序運行時： 1）setError（）方法沒有被調用。 2.）我無法在editText上使用setText（）和setFocus（）。

請注意，我需要Kotlin解決方案而不是Java。

在此先感謝！

private fun askAppointment() { 

    if (editTextPersonName?.text.isNullOrEmpty()) { 
     editTextPersonName?.error ="Person Name cannot be empty." 
     return 
    } else if (editTextPersonMobile?.text.isNullOrEmpty()) { 
     editTextPersonMobile?.error = "Person Mobile cannot be empty." 
     return 
    } else if (editTextPersonEmail?.text.isNullOrEmpty()) { 
     editTextPersonEmail?.error = "Person Email cannot be empty." 
     return 
    } else if (editTextSubject?.text.isNullOrEmpty()) { 
     editTextSubject?.error = "Subject cannot be empty." 
     return 
    } else if (editTextDescription?.text.isNullOrEmpty()) { 
     editTextDescription?.error = "Description cannot be empty." 
     return 
    } else if (editTextAppointmentDate?.text.isNullOrEmpty()) { 
     editTextAppointmentDate?.error = "Appointment Date cannot be empty." 
     return 
    } else if (editTextAppointmentTime?.text.isNullOrEmpty()) { 
     editTextAppointmentTime?.error = "Appointment Time cannot be empty." 
     return 
    } 

Answer 1

這很簡單。假設etEmail是EditText。您可以設置文字這樣

etEmail?.setText("some text") 

而對於錯誤，您可以使用此

etEmail?.error = "This is error" 

而對於集foucus你可以試試這個，但我不知道這件事。

etEmail?.isFocusable = false 

我希望這會幫助你。

查看上面代碼的工作截圖。

使用這種邏輯askAppointment()

private fun askAppointment() { 

    if (editTextPersonName?.text.isNullOrEmpty()) { 
     editTextPersonName?.error = "Person Name cannot be empty." 
     return 
    } else if (editTextPersonMobile?.text.isNullOrEmpty()) { 
     editTextPersonMobile?.error = "Person Mobile cannot be empty." 
     return 
    } else if (editTextPersonEmail?.text.isNullOrEmpty()) { 
     editTextPersonEmail?.error = "Person Email cannot be empty." 
     return 
    } else if (editTextSubject?.text.isNullOrEmpty()) { 
     editTextSubject?.error = "Subject cannot be empty." 
     return 
    } else if (editTextDescription?.text.isNullOrEmpty()) { 
     editTextDescription?.error = "Description cannot be empty." 
     return 
    } else if (editTextAppointmentDate?.text.isNullOrEmpty()) { 
     editTextAppointmentDate?.error = "Appointment Date cannot be empty." 
     return 
    } else if (editTextAppointmentTime?.text.isNullOrEmpty()) { 
     editTextAppointmentTime?.error = "Appointment Time cannot be empty." 
     return 
    } else { 
     //creating volley string request 
     val stringRequest = object : StringRequest(Request.Method.POST, URL, 
       Response.Listener<String> { response -> 
        try { 
         val jsonObject = JSONObject(response) 
         val feedback = jsonObject.getString("response") 
         toast("$feedback") 
         //finish()  //finish Activity after sending request 
        } catch (e: JSONException) { 
         e.printStackTrace() 
        } 
       }, 
       object : Response.ErrorListener { 
        override fun onErrorResponse(volleyError: VolleyError) { 
         toast("error :(") 
        } 
       }) { 
      @Throws(AuthFailureError::class) 
      override fun getParams(): Map<String, String> { 
       val params = HashMap<String, String>() 
       params.put("personName", editTextPersonName?.text.toString()) 
       params.put("personMobile", editTextPersonMobile?.text.toString()) 
       params.put("personEmail", editTextPersonEmail?.text.toString()) 
       params.put("subject", editTextSubject?.text.toString()) 
       params.put("description", editTextDescription?.text.toString()) 
       params.put("appointMentDate", editTextAppointmentDate?.text.toString()) 
       params.put("appointMentTime", editTextAppointmentTime?.text.toString()) 
       return params 
      } 
     } 

     //adding request to queue 
     AppController.instance?.addToRequestQueue(stringRequest) 
    } 
}