CountDownTimer 中的 android-putParcelableArrayList 将相同的值放在返回的列表上

Posted 2023-04-19

【中文标题】CountDownTimer 中的 android-putParcelableArrayList 将相同的值放在返回的列表上

【英文标题】：android- putParcelableArrayList in CountDownTimer put same value on List returned

【发布时间】：2017-01-03 00:35:56

【问题描述】：

我尝试在 countDown 中从 AudioRecord 获取 val，但是当我在 Activity 中获取额外列表时，包含相同的值（我已经检查过 AudioRecord 是否返回了不同的值）。请帮我！。提前致谢。 注意：我调用 countDown 传递它 45 * 1000 和 100

// Class of CountDownTimer
dataValues = new ArrayList<Data>();
(MenuActivity)context).runOnUiThread(new Runnable() 
        @Override
        public void run() 
            new CountDownTimer(millis, intervalInMillis)
                @Override
                public void onTick(long millisUntilFinished) 
                        firstValues.add(val); // val from AudioRecord
                   if (firstValues.size() >=10)
                        firstValues.remove(0);
                        data.setValue(avgFromIntList(firstValues));
                        data.setTime(new Date().getTime());
                        dataValues.add(data);

                    
                

                @Override
                public void onFinish() 
                    Bundle extras = new Bundle();

                    extras.putLong("idSession", session.getId());
                    extras.putParcelableArrayList("values",dataValues);

                    Intent toPast = new Intent(context, SessionPastActivity.class);
                    toPast.putExtras(extras);
                    context.startActivity(toPast);

                
            .start();
        
    );


// Model class that implement Parcelable

公共类数据实现 Parcelable

private Integer value; 
private Long time;

public Data(Integer value, Long time) 
    this.value = value;
    this.time = time;


public Data() 




public Integer getValue() 
    return value;


public void setValue(Integer value) 
    this.value = value;


public Long getTime() 
    return time;


public void setTime(Long time) 
    this.time = time;




@Override
public String toString() 
    return "Data" +
            ", value=" + value +
            ", time=" + time +
            '';


@Override
public int describeContents() 
    return 0;


@Override
public void writeToParcel(Parcel dest, int flags) 

    dest.writeInt(value);
    dest.writeLong(time);

    Log.e("inWrite", toString());


// this is used to regenerate your object. All Parcelables must have a CREATOR that implements these two methods
public static final Parcelable.Creator<Data> CREATOR = new Parcelable.Creator<Data>() 
    public Data createFromParcel(Parcel in) 
        return new Data(in);
    

    public Data[] newArray(int size) 
        return new Data[size];
    
;

// example constructor that takes a Parcel and gives you an object populated with it's values
private Data(Parcel in) 

    value = in.readInt();
    time = in.readLong();

    Log.e("inREAD", toString());

// 活动类

ArrayList values_amplitude = getIntent().getExtras().getParcelableArrayList("values");

【问题讨论】：

请创建一个Minimal, Complete, Verifiable Example。

【参考方案1】：

试试这个

Bundle bundle=getIntent.getExtra();

    if(bundle != null)
    ArrayList<Data> values_amplitude = (ArrayList<Data>).getParcelable("values");
     else 

希望对你有用

【讨论】：

不工作，抛出此错误：键值预期 Parcelable 但值是 java.util.ArrayList。返回默认值 。 java.lang.ClassCastException: java.util.ArrayList 无法转换为 android.os.Parcelable

这样传递值 \ Intent toPast = new Intent(context, SessionPastActivity.class); toPast.putExtra("idSession", session.getId()); toPast .putExtra("values",dataValues); context.startActivity(toPast);