Question

如何将List <Question> quesList之类的列表传递给Android中的其他活动。

问题类似于

public class Question 
{
        private int Question_id;
        private String Question;        
        private String OPTA;
        private String OPTB;
        private String OPTC;
        private String OPTD;
        private String Answer;
        private int Category_id;
        private String YourAnswer;




//getter and setter methods
}

Answer 1

您的问题应该实现Parcelable界面，然后您可以通过意图及其[putParcelableArrayListExtra方法] [2]

来放置您的数据

Intent intentToLaunchMyNewActivity = new Intent(getApplicationContext(), NewActivity.class)
    .putParcelableArrayListExtra("myList", myList);

startActivity(intentToLaunchMyNewActivity );

[2]：http://developer.android.com/reference/android/content/Intent.html#putParcelableArrayListExtra(java.lang.String，java.util.ArrayList）

Answer 2

您需要为问题类实现parcelable接口：

注意：我使用在线工具创建了此模板。你也可以尝试一下。到这里 http://parcelabler.com/

public class Question implements Parcelable {
    private int Question_id;
    private String Question;        
    private String OPTA;
    private String OPTB;
    private String OPTC;
    private String OPTD;
    private String Answer;
    private int Category_id;
    private String YourAnswer;

 //getter and setter methods

protected Question(Parcel in) {
    Question_id = in.readInt();
    Question = in.readString();
    OPTA = in.readString();
    OPTB = in.readString();
    OPTC = in.readString();
    OPTD = in.readString();
    Answer = in.readString();
    Category_id = in.readInt();
    YourAnswer = in.readString();
}

@Override
public int describeContents() {
    return 0;
}

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeInt(Question_id);
    dest.writeString(Question);
    dest.writeString(OPTA);
    dest.writeString(OPTB);
    dest.writeString(OPTC);
    dest.writeString(OPTD);
    dest.writeString(Answer);
    dest.writeInt(Category_id);
    dest.writeString(YourAnswer);
}

@SuppressWarnings("unused")
public static final Parcelable.Creator<Question> CREATOR = new Parcelable.Creator<Question>() {
    @Override
    public Question createFromParcel(Parcel in) {
        return new Question(in);
    }

    @Override
    public Question[] newArray(int size) {
        return new Question[size];
    }
};
}

Answer 3

使用该示例

ArrayList<String> list= new ArrayList<String>();



serverIntent=new Intent(getApplicationContext(),add_costomer_meter_info.class);
    serverIntent.putExtra("list", list);
      startActivity(serverIntent);

和add_costomer_meter_info.java

ArrayList<String> list= new ArrayList<String>(); 




Intent intent=getIntent();
 list= (HashMap<String, String>) intent.getSerializableExtra("list");

Answer 4

您可以通过 Parcelable 和可序列化

来实现

使用Serializable实现它有几个步骤。

Step1：创建您的类并实现Serializable接口。如果没有实现Serializable接口，则无法执行这些步骤。

@SuppressWarnings("serial")
public class MyClass implements Serializable {

}

第2步：当你要去 startActivity（意图）时，在第一个活动中应用此代码;

ArrayList<MyClass> list = new ArrayList<MainActivity.MyClass>();
list.add(new MyClass());
Intent intent = new Intent();
intent.putExtra("MyClassList", list);

Step3：在第二个活动中应用此代码，您将获得arrayList。

ArrayList<MyClass> list1 = (ArrayList<MyClass>)getIntent().getSerializableExtra("MyClassList");
System.out.println(list1);

希望它会对你有所帮助.. :)

如何将列表传递给Android中的另一个活动？

4 个答案: