java.lang.NoClassDefFoundError:android/media/Image android/firebase

我是firebase android的初学者，我想在

列表视图中显示一个表。我的表格
海报
包含三个字段：
图像
、
状态
和
用户名
。我尝试了这段代码，但出现了这个错误，我在stackoverflow中搜索，但没有找到这种类型的错误，我认为
图像
字段中的问题，谢谢

java.lang.NoClassDefFoundError: android/media/Image
at java.lang.Class.getDeclaredFields(Native Method)
at java.lang.Class.getPublicFieldsRecursive(Class.java:846)
at java.lang.Class.getFields(Class.java:829)
at com.google.android.gms.internal.zzbtg$zza.<init>(Unknown Source)
at com.google.android.gms.internal.zzbtg.zzi(Unknown Source)
at com.google.android.gms.internal.zzbtg.zze(Unknown Source)
at com.google.android.gms.internal.zzbtg.zzb(Unknown Source)
at com.google.android.gms.internal.zzbtg.zza(Unknown Source)
at com.google.firebase.database.DataSnapshot.getValue(Unknown Source)

 at com.example.root.guidetouristique.PosteGestion$1.onChildAdded(PosteGestion.java:36)
at com.google.android.gms.internal.zzbox.zza(Unknown Source)
at com.google.android.gms.internal.zzbqx.zzZV(Unknown Source)
at com.google.android.gms.internal.zzbra$1.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: android.media.Image
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
at java.lang.Class.getDeclaredFields(Native Method) 
at java.lang.Class.getPublicFieldsRecursive(Class.java:846) 
at java.lang.Class.getFields(Class.java:829) 
at com.google.android.gms.internal.zzbtg$zza.<init>(Unknown Source) 
at com.google.android.gms.internal.zzbtg.zzi(Unknown Source) 
at com.google.android.gms.internal.zzbtg.zze(Unknown Source) 
at com.google.android.gms.internal.zzbtg.zzb(Unknown Source) 
at com.google.android.gms.internal.zzbtg.zza(Unknown Source) 
at com.google.firebase.database.DataSnapshot.getValue(Unknown Source) 
at com.example.root.guidetouristique.PosteGestion$1.onChildAdded(PosteGestion.java:36)

Post.java

public class Post {
public  Image image;
public  String userName;
public  String imagePost;
public  String status ;

public Post(String userName, String imagePost, String status) {
    this.userName = userName;
    this.imagePost = imagePost;
    this.status = status;
}

public Post(Image image, String userName, String imagePost, String status) {
    this.image = image;
    this.userName = userName;
    this.imagePost = imagePost;
    this.status = status;

}

public Post(String userName, String status) {
    this.userName = userName;
    this.status = status;
}

public Post() {
    this.image=null;
    this.imagePost=null;
    this.userName=null;
    this.status=null;
}

@Override
public String toString() {
    return "Post{" +
            "image=" + image +
            ", userName='" + userName + '\'' +
            ", imagePost='" + imagePost + '\'' +
            ", status='" + status + '\'' +
            '}';
}
}

您的
Post.java
类正在引用类
android.media.Image
。正如您在中所看到的，它是在API级别19（Kit Kat）中添加的

可能发生的情况是，您正在处于较低API级别的仿真器或设备上运行代码，这意味着该类不可用

android.media.Image
是否真的是您想要存储在Post对象中的内容？Firebase SDK无论如何都无法加载该字段并将其存储到数据库中。
您能否编辑您的问题以显示Post.java的内容？没错，我使用的是仿真器API 16，我正在下载带有API 19的新版本
public class Post {
public  Image image;
public  String userName;
public  String imagePost;
public  String status ;

public Post(String userName, String imagePost, String status) {
    this.userName = userName;
    this.imagePost = imagePost;
    this.status = status;
}

public Post(Image image, String userName, String imagePost, String status) {
    this.image = image;
    this.userName = userName;
    this.imagePost = imagePost;
    this.status = status;

}

public Post(String userName, String status) {
    this.userName = userName;
    this.status = status;
}

public Post() {
    this.image=null;
    this.imagePost=null;
    this.userName=null;
    this.status=null;
}

@Override
public String toString() {
    return "Post{" +
            "image=" + image +
            ", userName='" + userName + '\'' +
            ", imagePost='" + imagePost + '\'' +
            ", status='" + status + '\'' +
            '}';
}
}