Question

我想创建自定义类，该类扩展了TextInputLayout并可以对其内部EditText进行某种访问，因此可以在其上设置焦点侦听器。根据焦点状态和EditText中的文本，错误显示在TextInputLayout中。以下是我当前的简单代码，其中编辑文本为null。我该如何实现具有自定义TextInputLayout与内部EditText通信的自定义class CustomTextInputLayout : TextInputLayout { constructor(context: Context) : super(context) constructor(context: Context, attrs: AttributeSet) : super(context, attrs) init { Log.e("_TEST", this.editText?.toString() ?: "null") // gives null editText?.setOnFocusChangeListener { v, hasFocus -> if (hasfocus.not()) { val textToCheck = editText?.text.toString() this.error = someValidationFunction(textToCheck) } } } }？

<com.app.utility.CustomTextInputLayout
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent">

            <com.google.android.material.textfield.TextInputEditText
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"/>

</com.app.utility.CustomTextInputLayout>

def hw_santander_scrap(Amount, Duration):
  from selenium import webdriver
  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.support import expected_conditions as EC
  chrome_options = webdriver.ChromeOptions()
  chrome_options.add_argument('--headless')
  chrome_options.add_argument('--no-sandbox')
  chrome_options.add_argument('--disable-dev-shm-usage')
  chrome_options.add_argument('--start-maximized')
  chrome_options.add_argument('window-size=10000x5000')
  webdriver = webdriver.Chrome('chromedriver', chrome_options = chrome_options)

  #
  import time
  maintenant = DT.now()
  period = str(maintenant.day) + '_' + str(maintenant.month) + '_' + str(maintenant.year)
  print('Start Scraping')

  ################################################ Santander###############################################

  Santander = pd.DataFrame({
      'Project': "reforma vivienda",
      'Period': period,
      'Monthly repayment': [0],
      'TIN': [0],
      'TAE': [0],
      'Total repayment': [0],
      'Initial amount': [0],
      'Duration': [0]
  })

  project = pd.DataFrame({
      'Project': "reforma vivienda",
      'Period': period,
      'Monthly repayment': [0],
      'TIN': [0],
      'TAE': [0],
      'Total repayment': [0],
      'Initial amount': [0],
      'Duration': [0]
  })
  url = 'https://simuladores.bancosantander.es/SantanderES/loansimulatorweb.aspx?por=webpublica&prv=publico&m=300&cta=1&ls=0#/t0'
  webdriver.get(url)

  Max_amount = 90.000
  Min_amount = 3.000
  for i in range(len(Amount)):
    Simulated_amount = Amount[i]
    if Simulated_amount > Max_amount:
      pass
    elif Simulated_amount < Min_amount:
      pass
    else :
      amount = WebDriverWait(webdriver, 10).until(EC.presence_of_element_located((By.CSS_SELECTOR, "#amount")))
      amount.clear()
      amount.send_keys("{:.3f}".format(Simulated_amount))
      WebDriverWait(webdriver, 30).until(lambda webdriver: webdriver.execute_script('return jQuery.active') == 0)
      for j in range(len(Duration)):
        Simulated_duration = Duration[j]
        Simulated_duration = round(int(Simulated_duration))
        Max_duration = 96
        Min_duration = 12
        if Simulated_duration > Max_duration:
          pass
        elif Simulated_duration < Min_duration:
          pass
        else :
          term = WebDriverWait(webdriver, 10).until(EC.presence_of_element_located((By.CSS_SELECTOR, "#term")))
        term.clear()
        term.send_keys("{}".format(Simulated_duration))
        term.send_keys(Keys.TAB)
        webdriver.save_screenshot('screenshot_santander.png')
        project.loc[j, 'Project'] = "reforma vivienda"
        project.loc[j, 'Initial amount'] = float("{:.3f}".format(Amount[i]).replace('.', ''))
        project.loc[j, 'Duration'] = Simulated_duration
        project.loc[j, 'Period'] = str(maintenant.day) + '/' + str(maintenant.month) + '/' + str(maintenant.year)
        project.loc[j, 'Monthly repayment'] = webdriver.find_element_by_css_selector('.r1 span').text.replace(' €', '').replace(',', '.')
        project.loc[j, 'TIN'] = float(webdriver.find_element_by_css_selector('.r3 span').text[6: 10].replace(',', '.'))
        project.loc[j, 'TAE'] = float(webdriver.find_element_by_css_selector('.r3 span').text[13: 17].replace(',', '.'))
        project.loc[j, 'Total repayment'] = float(webdriver.find_element_by_css_selector('.r7 span').text.replace(' €', '').replace('.', '').replace(',', '.'))
      Santander = Santander.append(project)
  Santander = Santander.loc[Santander.TIN != 0,: ]
  Santander.to_csv('Santander_{}.csv'.format(period), index = False)
print('End Scraping')

Answer 1

editText尚未用init方法初始化。首先，将布置父母，然后是孩子。请检查此方法

onLayout(boolean changed, int left, int top, int right, int bottom)

如果您要创建自定义视图或视图组，则视图生命周期非常重要。

https://developer.android.com/reference/android/view/ViewGroup.html

自定义TextInputLayout-内部editText为null

1 个答案: