在 Android Studio 中膨胀类 EditText 时出错

Question

我正在登录屏幕，它包含两个 EditText，当我在 android studio 中运行应用程序时，我收到错误

android.view.InflateException: Binary XML file line #37: Binary XML file line #37: Error inflating class EditText

这是日志错误的第一行

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: org.techgeorge.loginscreen, PID: 27960
    java.lang.RuntimeException: Unable to start activity ComponentInfo{org.techgeorge.loginscreen/org.techgeorge.loginscreen.MainActivity}: android.view.InflateException: Binary XML file line #37: Binary XML file line #37: Error inflating class EditText
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2974)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3059)
        at android.app.ActivityThread.-wrap11(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1724)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:7000)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:441)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)
     Caused by: android.view.InflateException: Binary XML file line #37: Binary XML file line #37: Error inflating class EditText
     Caused by: android.view.InflateException: Binary XML file line #37: Error inflating class EditText
     Caused by: java.lang.NumberFormatException: For input string: "18sp"

提示 xml 文件的第 37 行，这是一个 EditText，但我认为 EditText 没有任何问题。 xml 布局文件没有给我关于任何属性错误或拼写错误的错误。除了指向这一行之外，日志没有提供很多信息

setContentView(R.layout.activity_main);

在 MainActivity.java 这是课程

package org.techgeorge.loginscreen;

public class MainActivity extends AppCompatActivity {

    private TextView titleTextView, registerTextView, forgetPassTextView;
    private EditText usernameEditText, passwordEditText;
    private ImageView logoImageView;
    private Button loginButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        titleTextView = findViewById(R.id.title_textview);
        registerTextView = findViewById(R.id.register_textview);
        forgetPassTextView = findViewById(R.id.forget_password_textview);
        usernameEditText = findViewById(R.id.user_edittext);
        passwordEditText = findViewById(R.id.password_edittext);
        logoImageView = findViewById(R.id.logo_imageview);
        loginButton = findViewById(R.id.button);

        loginButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getApplicationContext(), ProfileActivity.class);
                startActivity(intent);
            }
        });
    }
}

这里是xml布局类activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:background="@drawable/login_background"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/logo_imageview"
        android:layout_width="62dp"
        android:layout_height="61dp"
        android:layout_marginTop="52dp"
        android:layout_marginEnd="8dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.511"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/ic_whatshot_white_24dp" />

    <TextView
        android:id="@+id/title_textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        android:fontFamily="@font/abril_fatface"
        android:text="SUNKAT"
        android:textAlignment="center"
        android:textColor="@color/headerTextColor"
        android:textSize="46sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/logo_imageview" />

    <EditText
        android:id="@+id/user_edittext"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="118dp"
        android:layout_marginEnd="8dp"
        android:backgroundTint="#ffffff"
        android:drawableLeft="@drawable/ic_person_white_24dp"
        android:ems="12"
        android:hint="@string/user_text_hint"
        android:inputType="textPersonName"
        android:text=""
        android:textAlignment="center"
        android:textColorHint="@color/hintTextColor"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/title_textview" />

    <EditText
        android:id="@+id/password_edittext"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="8dp"
        android:backgroundTint="#ffffff"
        android:drawableLeft="@drawable/ic_lock_white_24dp"
        android:ems="12"
        android:hint="@string/password_text_hint"
        android:inputType="textPassword"
        android:text=""
        android:textAlignment="center"
        android:textColorHint="@color/hintTextColor"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.503"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/user_edittext" />

    <Button
        android:id="@+id/button"
        android:layout_width="256dp"
        android:layout_height="42dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="20dp"
        android:layout_marginEnd="8dp"
        android:background="@drawable/button_shape"
        android:text="login"
        android:textColor="@android:color/background_light"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.539"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/password_edittext" />

    <TextView
        android:id="@+id/register_textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:text="Register"
        android:textColor="#62BCFA"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.223"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button" />

    <TextView
        android:id="@+id/forget_password_textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:text="forgot password?"
        android:textColor="#62BCFA"
        android:textSize="16sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.762"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button" />

</android.support.constraint.ConstraintLayout>

Answer 1

请注意，您的堆栈跟踪也包含以下信息：

Caused by: java.lang.NumberFormatException: For input string: "18sp"

这应该可以帮助您查明问题。

Answer 2

我遇到过同样的事情，我认为它的错误，让我们先尝试删除它，然后重写它