Android 不幸的是，我的应用程序在API 16至24上运行时停止，但在API 25上运行

我正在构建一个以API 16为目标的book应用程序，但在API 16-24模拟器中运行它时总是会出现此错误。它只有在API25-27模拟器上运行时才能正确加载而不会出错。但是，当我排除ImageView小部件时，它在API 16 up模拟器上正确运行。我如何解决这个问题，因为我需要ImageView在应用程序中起作用。这是图像视图和布局的activity_main.xml文本

<ImageView
    android:id="@+id/logo"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:contentDescription="@null"
    android:scaleType="centerCrop"
    app:layout_constraintBottom_toTopOf="@+id/getstarted"
    app:layout_constraintDimensionRatio="w,3:2"
    app:layout_constraintEnd_toStartOf="@+id/guideline2"
    app:layout_constraintStart_toStartOf="@+id/guideline"
    app:layout_constraintTop_toBottomOf="@+id/wclnote2"
    app:srcCompat="@drawable/logoview" /> 


<?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:layout_gravity="center|fill"
    tools:context=".MainActivity">
</android.support.constraint.ConstraintLayout>

这是完整的布局xml代码

<?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:layout_gravity="center|fill"
 tools:context=".MainActivity">

<TextView
    android:id="@+id/wlcnote1"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="100dp"
    android:gravity="center"
    android:text="@string/note1"
    android:textAppearance="@style/TextAppearance.AppCompat.Title"
    app:layout_constraintEnd_toStartOf="@+id/guideline2"
    app:layout_constraintHorizontal_bias="0.0"
    app:layout_constraintStart_toStartOf="@+id/guideline"
    app:layout_constraintTop_toTopOf="parent" />

<android.support.constraint.Guideline
    android:id="@+id/guideline"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_begin="16dp" />

<android.support.constraint.Guideline
    android:id="@+id/guideline2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_end="16dp" />

<TextView
    android:id="@+id/wclnote2"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="24dp"
    android:gravity="center"
    android:text="@string/note2"
    android:textAppearance="@style/TextAppearance.AppCompat.Title"
    app:layout_constraintEnd_toStartOf="@+id/guideline2"
    app:layout_constraintStart_toStartOf="@+id/guideline"
    app:layout_constraintTop_toBottomOf="@+id/wlcnote1" />

<Button
    android:id="@+id/getstarted"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginBottom="24dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:background="?attr/colorPrimary"
    android:text="Get Started"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toStartOf="@+id/guideline2"
    app:layout_constraintStart_toStartOf="@+id/guideline" />


<ImageView
    android:id="@+id/logo"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:contentDescription="@null"
    android:scaleType="centerCrop"
    app:layout_constraintBottom_toTopOf="@+id/getstarted"
    app:layout_constraintDimensionRatio="w,3:2"
    app:layout_constraintEnd_toStartOf="@+id/guideline2"
    app:layout_constraintStart_toStartOf="@+id/guideline"
    app:layout_constraintTop_toBottomOf="@+id/wclnote2"
    app:srcCompat="@drawable/logoview" />

</android.support.constraint.ConstraintLayout>

原因可能是，您正在ConstraintLayout顶部定义ImageView，或者，在ImageView上方添加此行

<?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">
    <ImageView
        android:id="@+id/logo"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:contentDescription="@null"
        android:scaleType="centerCrop"
        app:layout_constraintBottom_toTopOf="@+id/getstarted"
        app:layout_constraintDimensionRatio="w,3:2"
        app:layout_constraintEnd_toStartOf="@+id/guideline2"
        app:layout_constraintStart_toStartOf="@+id/guideline"
        app:layout_constraintTop_toBottomOf="@+id/wclnote2"
        app:srcCompat="@drawable/logoview" /> 


        <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:layout_gravity="center|fill"
        tools:context=".MainActivity"/>
    </android.support.constraint.ConstraintLayout>

也发布你的gradle文件。logcat错误是什么？原因可能是，你在ConstraintLayout顶部定义了ImageView，或者，在ImageView上面添加了这一行。我在ImageView之前添加了一行代码，但生成了一个错误“生成失败1m 24s 999ms启动Gradle守护进程8s 348ms运行生成40s 664ms加载生成3s 227ms配置生成27s 683ms计算任务图310ms运行任务8s 231ms null C:/Users/GODWIN ACQUAH/AndroidStudioProjects/StudyBuddy app/src/main/res布局/activity_main。xml错误：xml或文本声明不在实体的开头。“首先，使用2个约束布局是没有意义的，但如果您想这样使用，请尝试我编辑的答案。它会起作用的。

<?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">
    <ImageView
        android:id="@+id/logo"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:contentDescription="@null"
        android:scaleType="centerCrop"
        app:layout_constraintBottom_toTopOf="@+id/getstarted"
        app:layout_constraintDimensionRatio="w,3:2"
        app:layout_constraintEnd_toStartOf="@+id/guideline2"
        app:layout_constraintStart_toStartOf="@+id/guideline"
        app:layout_constraintTop_toBottomOf="@+id/wclnote2"
        app:srcCompat="@drawable/logoview" /> 


        <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:layout_gravity="center|fill"
        tools:context=".MainActivity"/>
    </android.support.constraint.ConstraintLayout>

<?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:layout_gravity="center|fill"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/logo"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:contentDescription="@null"
        android:scaleType="centerCrop"
        app:layout_constraintBottom_toTopOf="@+id/getstarted"
        app:layout_constraintDimensionRatio="w,3:2"
        app:layout_constraintEnd_toStartOf="@+id/guideline2"
        app:layout_constraintStart_toStartOf="@+id/guideline"
        app:layout_constraintTop_toBottomOf="@+id/wclnote2"
        app:srcCompat="@drawable/logoview" /> 

</android.support.constraint.ConstraintLayout>