android.view.InflateException：二进制XML文件行＃27：android.support.design.widget.TextInputEditText无法强制转换为android.view.ViewGroup

Question

我创建一个登录布局，但当我尝试写这一行

setContentView(R.layout.activity_login);

它告诉我一个错误

ERROR: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.look.instragramclone/com.example.look.instragramclone.Likes.LikesActivity}: android.view.InflateException: Binary XML file line #27: android.support.design.widget.TextInputEditText cannot be cast to android.view.ViewGroup

我找不到问题。我正在添加相关代码

我尝试添加这些库：

实现fileTree（dir：'libs'，include：['* .jar']）实现'com.android.support:appcompat-v7:28.0.0'

//为协调器布局实现设计支持库'com.android.support:design:28.0.0'

实现'com.github.ittianyu：BottomNavigationViewEx：2.0.2'

//圆形图像实现'de.hdodenhof：circleimageview：3.0.0'

//通用图像加载器实现'com.nostra13.universalimageloader：universal-image-loader：1.9.5'

登录布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:paddingTop="55dp"
        android:paddingLeft="25dp"
        android:paddingRight="25dp">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="70dp"
            android:src="@drawable/instagram_logo"
            android:layout_gravity="center"
            android:layout_marginBottom="25dp"/>

        <android.support.design.widget.TextInputEditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp">

            <EditText
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:inputType="textEmailAddress"
                android:hint="Email"
                android:id="@+id/input_email"/>

        </android.support.design.widget.TextInputEditText>

        <android.support.design.widget.TextInputEditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp">

            <EditText
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:inputType="textPassword"
                android:hint="Password"
                android:id="@+id/input_password"/>

        </android.support.design.widget.TextInputEditText>

        <android.support.v7.widget.AppCompatButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="25dp"
            android:text="Login"
            android:id="@+id/btn_Login"
            android:padding="12dp"
            android:background="@drawable/white_rounded_btn"/>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="25dp"
            android:text="No account yet? Create one"
            android:gravity="center"
            android:textSize="16dp"
            android:id="@+id/link_singup"
            android:textColor="@color/blue"/>

    </LinearLayout>

    <ProgressBar
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:id="@+id/loginRequestLoadingProgressBar"
        android:layout_centerInParent="true"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Pleasr wait..."
        android:textColor="@color/black"
        android:textSize="20sp"
        android:layout_alignBottom="@+id/loginRequestLoadingProgressBar"
        android:layout_alignStart="@id/loginRequestLoadingProgressBar"
        android:layout_alignEnd="@id/loginRequestLoadingProgressBar"/>


</RelativeLayout>

Java的：

private static final String TAG = "LikesActivity";

private Context mContext = LikesActivity.this;

private static final int ACTIVITY_NO = 3;


@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_login);
    -->Note: this line shows the error

    //setupNavigationView();
}
/***BottomNavigationView setup***/

private void setupNavigationView(){

    BottomNavigationViewEx bottomNavigationViewEx = findViewById(R.id.bottomNavViewBar);
    BottomNavigationViewHelper.setupBottomNavigationView(bottomNavigationViewEx);
    BottomNavigationViewHelper.enableNavigation(mContext,bottomNavigationViewEx);
    Menu menu = bottomNavigationViewEx.getMenu();
    MenuItem menuItem = menu.getItem(ACTIVITY_NO);
    menuItem.setChecked(true);
}

Answer 1

使用TextInputLayout而不是TextInputEdittext。

下面的代码用于textinputlayout使用：

<android.support.design.widget.TextInputLayout
   android:id="@+id/usernameWrapper"
   android:layout_width="match_parent"
   android:layout_height="wrap_content">

<EditText
    android:id="@+id/username"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:inputType="textEmailAddress"
    android:hint="Email"/> 

</android.support.design.widget.TextInputLayout>

Answer 2

您可以通过将子项放在以下xml中来将TextInputEditText视为ViewGroup -

<android.support.design.widget.TextInputEditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp">

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="textEmailAddress"
            android:hint="Email"
            android:id="@+id/input_email"/>

    </android.support.design.widget.TextInputEditText>

您需要使用它作为视图 -

        <android.support.design.widget.TextInputEditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp"/> // close this tag here