TextInputLayout setCounterEnables不起作用 - Android

Question

我有一个带有TextInputLayouts 元素的布局，我想启用字符计数器。问题是它不起作用，当我运行应用程序时我看不到计数器。

这是我的布局：

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorBackground"
android:paddingLeft="@dimen/create_step_padding"
android:paddingRight="@dimen/create_step_padding"
android:paddingTop="@dimen/create_step_padding">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Shipper Text Area-->
<android.support.design.widget.TextInputLayout
android:id="@+id/shipper_layout"
android:layout_width="0dp"
android:layout_height="110dp"
android:background="@drawable/text_area_background"
android:paddingEnd="@dimen/text_input_layout_side_padding"
android:paddingStart="@dimen/text_input_layout_side_padding"
android:paddingTop="@dimen/text_input_layout_top_padding"
app:counterEnabled="true"
app:hintTextAppearance="@style/HintTextStyle"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<android.support.design.widget.TextInputEditText
android:id="@+id/shipper_field"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@null"
android:gravity="top|start"
android:hint="@string/shipper_field"
android:inputType="textMultiLine"
android:lines="5"
android:overScrollMode="always"
android:scrollbarStyle="insideInset"
android:scrollbars="vertical" />
</android.support.design.widget.TextInputLayout>

<!-- Consignee Text Area-->
<android.support.design.widget.TextInputLayout
android:id="@+id/consignee_layout"
android:layout_width="0dp"
android:layout_height="110dp"
android:layout_marginTop="16dp"
android:background="@drawable/text_area_background"
android:paddingLeft="@dimen/text_input_layout_side_padding"
android:paddingTop="@dimen/text_input_layout_top_padding"
app:counterEnabled="true"
app:hintTextAppearance="@style/HintTextStyle"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/shipper_layout">
<android.support.design.widget.TextInputEditText
android:id="@+id/consignee_field"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@null"
android:gravity="top|start"
android:hint="@string/consignee_field"
android:inputType="textMultiLine"
android:lines="5"
android:overScrollMode="always"
android:scrollbarStyle="insideInset"
android:scrollbars="vertical" />
</android.support.design.widget.TextInputLayout>
<!-- Airport of Departure -->
<!-- Airport of Destination -->
<com.silverfix.dgdeditor.utils.views.AirportAutoCompleteEditText
android:id="@+id/aodep_field"
android:layout_width="217dp"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Name"
app:layout_constraintBottom_toBottomOf="@+id/textView11"
app:layout_constraintHorizontal_bias="0.512"
app:layout_constraintLeft_toRightOf="@+id/textView11"
app:layout_constraintRight_toRightOf="parent" />
<com.silverfix.dgdeditor.utils.views.AirportAutoCompleteEditText
android:id="@+id/aodes_field"
android:layout_width="217dp"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName"
android:text="Name"
app:layout_constraintBottom_toBottomOf="@+id/textView12"
app:layout_constraintLeft_toLeftOf="@+id/aodep_field" />
<TextView
android:id="@+id/textView11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="32dp"
android:text="@string/aodep_field"
android:textAppearance="@style/DefaultTextStyle"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/consignee_layout" />
<TextView
android:id="@+id/textView12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:text="@string/aodes_field"
android:textAppearance="@style/DefaultTextStyle"
app:layout_constraintLeft_toLeftOf="@+id/textView11"
app:layout_constraintTop_toBottomOf="@+id/textView11" />
</android.support.constraint.ConstraintLayout>
</ScrollView>

如您所见，我在TextInputLayouts 中启用了app:counterEnabled。 然后我尝试在我的代码中设置最大字符数。

这是代码：

shipperTextArea = (TextInputLayout) rootView.findViewById(R.id.shipper_layout);
consigneeTextArea = (TextInputLayout) rootView.findViewById(R.id.consignee_layout);
shipperTextArea.setCounterMaxLength(60);
consigneeTextArea.setCounterMaxLength(60);

Answer 1

只需在XML文件中设置计数器，添加以下内容：

<android.support.design.widget.TextInputLayout
app:counterMaxLength="60"
app:counterEnabled="true"

我认为这不需要在 Java 类中进行设置。