DatabaseException: No properties to serialize found on class
DatabaseException: No properties to serialize found on class
我遇到了错误com.google.firebase.database.DatabaseException: 在类com.example.journyabode.detailsofUser中找不到可序列化的属性。\n我尝试了更改proguard规则，但仍然无法解决。\n
public class User_Details extends AppCompatActivity {
EditText F_name,L_Name,Mobile,address;
Button update;
private FirebaseAuth mAuth;
private String user;
private DatabaseReference myref;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_user_details);
mAuth =FirebaseAuth.getInstance ();
user = mAuth.getCurrentUser ().getUid ();
myref = FirebaseDatabase.getInstance ().getReference ("Users");
if(mAuth.getCurrentUser ()== null){
finish ();
startActivity (new Intent (this,Login.class));
}
F_name = (EditText)findViewById (R.id.F_Name);
L_Name = (EditText)findViewById (R.id.L_Name);
Mobile = (EditText)findViewById (R.id.Phone);
address = (EditText)findViewById (R.id.Address);
update = (Button)findViewById (R.id.update);
update.setOnClickListener (new View.OnClickListener () {
@Override
public void onClick(View view) {
String First_Name = F_name.getText ().toString ().trim ();
String Last_Name = L_Name.getText ().toString ().trim ();
String phone = Mobile.getText ().toString ().trim ();
String addres = address.getText ().toString ().trim ();
if (TextUtils.isEmpty (First_Name)) {
Toast.makeText (User_Details.this, "请输入名字", Toast.LENGTH_SHORT).show ();
return;
}
if (TextUtils.isEmpty (Last_Name)) {
Toast.makeText (User_Details.this, "请输入姓氏", Toast.LENGTH_SHORT).show ();
return;
}
if (TextUtils.isEmpty (phone)) {
Toast.makeText (User_Details.this, "请输入电话号码", Toast.LENGTH_SHORT).show ();
return;
}
if (TextUtils.isEmpty (addres)) {
Toast.makeText (User_Details.this, "请输入地址", Toast.LENGTH_SHORT).show ();
return;
}
detailsofUser userDetail = new detailsofUser (First_Name, Last_Name, phone, addres);
FirebaseUser user = mAuth.getCurrentUser ();
myref.child (user.getUid ()).setValue (userDetail);
Intent intent = new Intent (User_Details.this,Homepage.class);
startActivity (intent);
Toast.makeText (User_Details.this, "详细信息已保存", Toast.LENGTH_SHORT).show ();
}
});
}
}
\nLogcat:\n
2019-02-23 00:32:45.205 27516-27516/? E/Zygote: isWhitelistProcess - 进程是白名单
2019-02-23 00:32:45.205 27516-27516/? E/libpersona: scanKnoxPersonas
2019-02-23 00:32:45.206 27516-27516/? E/libpersona: 无法打开文件 - /data/system/users/0/personalist.xml - 无此文件或目录
2019-02-23 00:32:53.426 27516-27516/com.example.journyabode E/AndroidRuntime: 致命异常：主要进程
进程：com.example.journyabode，PID：27516
com.google.firebase.database.DatabaseException: 在类com.example.journyabode.detailsofUser中找不到可序列化的属性
at com.google.android.gms.internal.firebase_database.zzku.(Unknown Source:761)
at com.google.android.gms.internal.firebase_database.zzkt.zza(Unknown Source:12)
at com.google.android.gms.internal.firebase_database.zzkt.zzi(Unknown Source:249)
at com.google.android.gms.internal.firebase_database.zzkt.zzh(Unknown Source:0)
at com.google.firebase.database.DatabaseReference.zza(Unknown Source:10)
at com.google.firebase.database.DatabaseReference.setValue(Unknown Source:7)
at com.example.journyabode.User_Details$1.onClick(User_Details.java:81)
at android.view.View.performClick(View.java:6993)
at android.widget.TextView.performClick(TextView.java:12752)
at android.view.View$PerformClick.run(View.java:26509)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:7025)
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)
在使用Firebase时，我遇到了一个问题：DatabaseException: No properties to serialize found on class。通过阅读Stack Overflow上的一个帖子（链接：Firebase No properties to serialize found on class），我找到了问题的原因和解决方法。
原因是我没有将变量定义为public。这是我犯下的错误。在使用Firebase时，所有要序列化的属性都必须是public的。
解决方法是将所有要序列化的属性改为public。在我的代码中，我需要确保所有要存储到Firebase数据库中的属性都是public的。
下面是我根据Stack Overflow帖子中的解决方案修改后的代码示例：
public class MyClass {
public String name;
public int age;
public boolean isActive;
public MyClass() {
// Default constructor required for Firebase
}
public MyClass(String name, int age, boolean isActive) {
this.name = name;
this.age = age;
this.isActive = isActive;
}
}
通过将属性改为public，我成功解决了DatabaseException: No properties to serialize found on class的问题。现在，我能够正确地将对象存储到Firebase数据库中了。
