材料设计文本输入布局在接触之前保持不可见

Question

使用材料设计“com.google.android.Material:Material:1.2.1”depedency我正在创建登录屏幕。我在ConstraintLayout->LinearLayout->com.google.android.Material.TextField.TextInputLayout下使用了com.google.android.Material.TextInputLayout。当layout加载时，textfield是不可见的，如果我单击该区域，它就会显示出来。如果我删除根约束布局的背景颜色，那么文本字段是可见的，但我想要白色背景。我试过改变风格，但不起作用

activit_login.xml

    <?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/constrant"
    android:background="@color/white"
    tools:context=".Login">

    <View
        android:id="@+id/topView"
        android:layout_width="0dp"
        android:layout_height="150dp"
        android:background="@color/colorPrimary"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <View
        android:id="@+id/view2"
        android:layout_width="0dp"
        android:layout_height="100dp"
        android:background="@drawable/wave"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/topView" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="32dp"
        android:layout_marginEnd="32dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/cat" />

    <TextView
        android:id="@+id/txt_login"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="76dp"
        android:text="Login"
        android:textAlignment="center"
        android:textColor="#F8F7F7"
        android:textSize="36sp"
        android:textStyle="normal|bold"
        app:layout_constraintEnd_toStartOf="@+id/imageView"
        app:layout_constraintHorizontal_bias="0.363"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <LinearLayout
        android:layout_width="409dp"
        android:layout_height="479dp"
        android:orientation="vertical"
        android:paddingLeft="20dp"
        android:paddingRight="20dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/view2">

        <com.google.android.material.textfield.TextInputLayout
            android:id="@+id/outlinedTextField"
            style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/username"
            app:startIconDrawable="@drawable/ic_phone_android">

            <com.google.android.material.textfield.TextInputEditText
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:inputType="number"
                android:maxLength="10" />

        </com.google.android.material.textfield.TextInputLayout>
    </LinearLayout>


</androidx.constraintlayout.widget.ConstraintLayout>

AndroidMenifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="get.get.get">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".Register"></activity>
        <activity android:name=".Login"  android:theme="@style/AppNoActionBar"/>
        <activity
            android:name=".Splash"
            android:theme="@style/Theme.MaterialComponents.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".MainActivity" />
    </application>

</manifest>

style.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.MaterialComponents">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>
    <style name="AppNoActionBar" parent="Theme.MaterialComponents.NoActionBar.Bridge">
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>

        <item name="boxStrokeColor">@color/colorPrimary</item>
        <item name="boxStrokeWidth">2dp</item>
    </style>
</resources>

Answer 1

如果我理解正确的话，您可以使用这个答案来更改默认框的笔画颜色。