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Vdovin Daniil
Asked:2020-06-18 01:31:31 +0000 UTC2020-06-18 01:31:31 +0000 UTC

通过 .apk 安装时程序出错

  • 772

再会。做了一个程序，总是通过在真实设备上调试来测试它。到了创建 Apk 文件的时候，问题就来了。该程序启动第一个屏幕，其中没有从服务器下载任何内容等等。最简单的 Activity，但是一旦我想开始使用该程序并转到更复杂的页面，它就会抛出错误并写入日志

com.google.firebase.database.DatabaseException：在类上找不到要序列化的属性

我检查了课程，通过（有线）而不是通过应用程序安装运行时它工作正常

告诉我滴在哪个方向......以及如何治疗

添加.1

 FATAL EXCEPTION: main
                                                                            Process: com.maikmarelostydios.a240417gid, PID: 2593
                                                                            com.google.firebase.database.DatabaseException: No properties to serialize found on class com.maikmarelostydios.a240417gid.BeatchJava.Beatch
                                                                                at com.google.android.gms.internal.zzbqi$zza.<init>(Unknown Source)
                                                                                at com.google.android.gms.internal.zzbqi.zzi(Unknown Source)
                                                                                at com.google.android.gms.internal.zzbqi.zze(Unknown Source)
                                                                                at com.google.android.gms.internal.zzbqi.zzb(Unknown Source)
                                                                                at com.google.android.gms.internal.zzbqi.zza(Unknown Source)
                                                                                at com.google.firebase.database.DataSnapshot.getValue(Unknown Source)
                                                                                at com.maikmarelostydios.a240417gid.BeatchJava.Beatch_List_ViewActivity$1.onChildAdded(Beatch_List_ViewActivity.java:80)
                                                                                at com.google.android.gms.internal.zzblz.zza(Unknown Source)
                                                                                at com.google.android.gms.internal.zzbnz.zzYj(Unknown Source)
                                                                                at com.google.android.gms.internal.zzboc$1.run(Unknown Source)
                                                                                at android.os.Handler.handleCallback(Handler.java:739)
                                                                                at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                                at android.os.Looper.loop(Looper.java:148)
                                                                                at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                                at java.lang.reflect.Method.invoke(Native Method)
                                                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

沙滩课

public class Beatch {
    String name;
    static String key;
  public Beatch() {
    }public Beatch(String name, String key) {
    this.name = name;
    this.key = key;
}
}`

接收数据的类

 reference.addChildEventListener(new ChildEventListener() {
        @Override
        public void onChildAdded(DataSnapshot dataSnapshot, String s) {
            result.add(dataSnapshot.getValue(Beatch.class));
            adapter.notifyDataSetChanged();

            LoadongBar.setVisibility(View.GONE);
        }

错误位置字符串result.add(dataSnapshot.getValue(Beatch.class));

java

1 个回答

  1. Best Answer

    尝试添加 getter 和 setter，如下所示：

    public class Beatch {
    String name;
    String key;
    public Beatch() {
    }
    public Beatch(String name, String key) {
        this.name = name;
        this.key = key;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }
}
    • 1

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