TextInputLayout setError方法在24.2.0中引发ClassCastException

问题描述

限时删除！！

我将支持库版本更新为24.2.0，现在我的注册屏幕消失了.问题出在TextInputLayout中，我有两种方法:

I updated support lib version to 24.2.0 and my registration screen is dead now. The problem is in the TextInputLayout, I have two methods:

    protected void setError(@Nullable CharSequence errorMsg, @NonNull EditText editText, boolean forceClean) {
        TextInputLayout viewParent = (TextInputLayout) editText.getParent();
        if (forceClean) {
            viewParent.setErrorEnabled(false);
            viewParent.setError(null);
        }
        viewParent.setErrorEnabled(true);
        viewParent.setError(errorMsg);
    }

    protected void clearError(@NonNull EditText editText) {
        TextInputLayout viewParent = (TextInputLayout) editText.getParent();
        viewParent.setErrorEnabled(false);
        viewParent.setError(null);
    }

当我尝试将EditText的父对象强制转换为TextInputLayout时出现错误，在布局中我具有以下代码:

I'm getting an error when I'm trying to cast the parent of EditText to TextInputLayout, in the layout I have this kind of code for that:

<android.support.design.widget.TextInputLayout
     android:layout_width="match_parent"
     android:layout_height="wrap_content">

     <android.support.design.widget.TextInputEditText
          android:id="@+id/login_registration_firstname"
          style="@style/registration_form_field"
          android:hint="@string/login_registration_firstname"
          android:inputType="textCapWords" />
</android.support.design.widget.TextInputLayout>

所以，这工作得很好，但是现在它抛出ClassCastException:

So, this worked perfectly fine, but now it throws ClassCastException:

java.lang.ClassCastException: android.widget.FrameLayout cannot be cast to android.support.design.widget.TextInputLayout

我想知道是否有一些新的指南吗?

I'm wondering if there some new guides on that?

推荐答案

问题调查表明，由于某种原因，存在额外的布局，因此，我们现在有了TextInputLayout-> FrameLayout-> TextInputEditText，这很可悲:(如temp解决方法，我创建了以下方法:

The problem investigation showed that there is extra layout for some reason, so now we have TextInputLayout -> FrameLayout -> TextInputEditText and that is sad :( so as temp workaround I've created following method:

@Nullable
private TextInputLayout getTextInputLayout(@NonNull EditText editText) {
        View currentView = editText;
        for (int i = 0; i < 2; i++) {
            ViewParent parent = currentView.getParent();
            if (parent instanceof TextInputLayout) {
                return (TextInputLayout) parent;
            } else {
                currentView = (View) parent;
            }
        }
        return null;
}

这将在视图层次结构中找到您的TextInputLayout.

This one will find your TextInputLayout in view hierarchy.

如果幸运的话，您会注意到这种粉红色错误的颜色变化，克服它的简单方法是在styles.xml中覆盖样式:

If you the lucky one you will notice this pink error color change, the easy way to overcome it is override style, in styles.xml:

<style name="TextAppearance.Design.Error" parent="TextAppearance.AppCompat.Caption" tools:override="true">
        <item name="android:textColor">@color/red</item>
</style>

这篇关于TextInputLayout setError方法在24.2.0中引发ClassCastException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

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