TextInputLayout显示错误的setError

Question

 if (etFirstName.getText().length() == 0) {
            etFirstName.requestFocus();
            tvFirstName.setError("Please enter firstname");
        } else {
            tvFirstName.setError(null);
            tvFirstName.setErrorEnabled(false);
        }

java.lang.RuntimeException: Failed to resolve attribute at index 24
            at android.content.res.TypedArray.getColor(TypedArray.java:401)
            at android.widget.TextView.<init>(TextView.java:692)
            at android.widget.TextView.<init>(TextView.java:629)
            at android.widget.TextView.<init>(TextView.java:625)
            at android.widget.TextView.<init>(TextView.java:621)
            at android.support.design.widget.TextInputLayout.setErrorEnabled(TextInputLayout.java:297)
            at android.support.design.widget.TextInputLayout.setError(TextInputLayout.java:344)

Answer 1

虽然我不完全理解为什么会出现这个问题，但它必须对Android如何根据视图的状态将颜色应用到视图上做些什么。

以下是我解决问题的方法：

在res/values/styles.xml中添加新样式节点：

    <style name="error" parent="@android:style/TextAppearance">
        <item name="android:textColor">@color/colorAccent</item> <!--apply the color you wat here -->
        <item name="android:textSize">12dp</item>
    </style>

<android.support.design.widget.TextInputLayout
        android:id="@+id/input_email_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        app:errorEnabled="true"
        app:errorTextAppearance="@style/error"
    >
        <android.support.design.widget.TextInputEditText
            android:id="@+id/input_email"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                  android:inputType="textEmailAddress"
                  android:hint="@string/hint_email"/>
    </android.support.design.widget.TextInputLayout>