androidx.appcompat.widget.AppCompatTextView#setId ( )源码实例Demo

/**
 * Whether the character counter functionality is enabled or not in this layout.
 *
 * @attr ref com.google.android.material.R.styleable#TextInputLayout_counterEnabled
 */
public void setCounterEnabled(boolean enabled) {
  if (counterEnabled != enabled) {
    if (enabled) {
      counterView = new AppCompatTextView(getContext());
      counterView.setId(R.id.textinput_counter);
      if (typeface != null) {
        counterView.setTypeface(typeface);
      }
      counterView.setMaxLines(1);
      indicatorViewController.addIndicator(counterView, COUNTER_INDEX);
      MarginLayoutParamsCompat.setMarginStart(
          (MarginLayoutParams) counterView.getLayoutParams(),
          getResources().getDimensionPixelOffset(R.dimen.mtrl_textinput_counter_margin_start));
      updateCounterTextAppearanceAndColor();
      updateCounter();
    } else {
      indicatorViewController.removeIndicator(counterView, COUNTER_INDEX);
      counterView = null;
    }
    counterEnabled = enabled;
  }
}
 

private void setPlaceholderTextEnabled(boolean placeholderEnabled) {
  // If the enabled state is the same as before, do nothing.
  if (this.placeholderEnabled == placeholderEnabled) {
    return;
  }

  // Otherwise, adjust enabled state.
  if (placeholderEnabled) {
    placeholderTextView = new AppCompatTextView(getContext());
    placeholderTextView.setId(R.id.textinput_placeholder);

    ViewCompat.setAccessibilityLiveRegion(
        placeholderTextView, ViewCompat.ACCESSIBILITY_LIVE_REGION_POLITE);

    setPlaceholderTextAppearance(placeholderTextAppearance);
    setPlaceholderTextColor(placeholderTextColor);
    addPlaceholderTextView();
  } else {
    removePlaceholderTextView();
    placeholderTextView = null;
  }
  this.placeholderEnabled = placeholderEnabled;
}
 

void setErrorEnabled(boolean enabled) {
  // If the enabled state is the same as before, do nothing.
  if (errorEnabled == enabled) {
    return;
  }

  // Otherwise, adjust enabled state.
  cancelCaptionAnimator();

  if (enabled) {
    errorView = new AppCompatTextView(context);
    errorView.setId(R.id.textinput_error);
    if (VERSION.SDK_INT >= 17) {
      errorView.setTextAlignment(View.TEXT_ALIGNMENT_VIEW_START);
    }
    if (typeface != null) {
      errorView.setTypeface(typeface);
    }
    setErrorTextAppearance(errorTextAppearance);
    setErrorViewTextColor(errorViewTextColor);
    setErrorContentDescription(errorViewContentDescription);
    errorView.setVisibility(View.INVISIBLE);
    ViewCompat.setAccessibilityLiveRegion(errorView, ViewCompat.ACCESSIBILITY_LIVE_REGION_POLITE);
    addIndicator(errorView, ERROR_INDEX);
  } else {
    hideError();
    removeIndicator(errorView, ERROR_INDEX);
    errorView = null;
    textInputView.updateEditTextBackground();
    textInputView.updateTextInputBoxState();
  }
  errorEnabled = enabled;
}
 

void setHelperTextEnabled(boolean enabled) {
  // If the enabled state is the same as before, do nothing.
  if (helperTextEnabled == enabled) {
    return;
  }

  // Otherwise, adjust enabled state.
  cancelCaptionAnimator();

  if (enabled) {
    helperTextView = new AppCompatTextView(context);
    helperTextView.setId(R.id.textinput_helper_text);
    if (VERSION.SDK_INT >= 17) {
      helperTextView.setTextAlignment(View.TEXT_ALIGNMENT_VIEW_START);
    }
    if (typeface != null) {
      helperTextView.setTypeface(typeface);
    }
    helperTextView.setVisibility(View.INVISIBLE);
    ViewCompat.setAccessibilityLiveRegion(
        helperTextView, ViewCompat.ACCESSIBILITY_LIVE_REGION_POLITE);
    setHelperTextAppearance(helperTextTextAppearance);
    setHelperTextViewTextColor(helperTextViewTextColor);
    addIndicator(helperTextView, HELPER_INDEX);
  } else {
    hideHelperText();
    removeIndicator(helperTextView, HELPER_INDEX);
    helperTextView = null;
    textInputView.updateEditTextBackground();
    textInputView.updateTextInputBoxState();
  }
  helperTextEnabled = enabled;
}