java.io.NotSerializableException: androidx.emoji2.text.SpannableBuilder问题求助

问题原因 #

你的保存逻辑中，UpdateText方法直接将EditText返回的CharSequence对象存入Note实例。当用户输入表情符号时，Android系统会用SpannableBuilder（emoji2库中的类）包装文本，而这个类未实现Serializable接口，导致序列化整个State对象时抛出异常。之前功能正常是因为未触发表情输入场景，此时CharSequence是普通的Serializable实现类（如String）。

修复方案 #

修改UpdateText方法，将CharSequence转换为String后再存入Note对象——String天然支持Serializable：

private void UpdateText(CharSequence text){
    State.St.st_current.getNote(noteId).setText(String.valueOf(text));
}

同时确保Note类中的text字段类型为String（而非CharSequence），避免后续序列化出现兼容问题：

public class Note implements Serializable {
    private String title;
    private String text; // 用String类型存储文本

    // getter和setter方法
    public String getText() { return text; }
    public void setText(String text) { this.text = text; }
}

验证逻辑 #

修改后，无论EditText返回的是普通String还是带表情的SpannableBuilder，都会被转换为String保存，既保留了完整文本内容（包括表情的字符表示），又保证了序列化的兼容性。

原错误日志 #

2022-07-12 07:20:57.196 28080-28080/com.learn.myapplication W/System.err: java.io.NotSerializableException: androidx.emoji2.text.SpannableBuilder
2022-07-12 07:20:57.196 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1240)
2022-07-12 07:20:57.196 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1604)
2022-07-12 07:20:57.196 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1565)
2022-07-12 07:20:57.196 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1488)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1234)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:354)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.util.ArrayList.writeObject(ArrayList.java:762)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1036)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1552)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1488)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1234)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1604)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1565)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1488)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1234)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1604)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1565)
2022-07-12 07:20:57.197 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1488)
2022-07-12 07:20:57.198 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1234)
2022-07-12 07:20:57.198 28080-28080/com.learn.myapplication W/System.err:     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:354)
2022-07-12 07:20:57.198 28080-28080/com.learn.myapplication W/System.err:     at com.learn.myapplication.Utility$ManageData.SaveState(Utility.java:34)

内容的提问来源于stack exchange，提问作者Shogery