我正在尝试从一个“活动”发送客户类的对象,并在另一个“”中显示它。

客户类别的代码:

public class Customer {

    private String firstName, lastName, address;
    int age;

    public Customer(String fname, String lname, int age, String address) {

        firstName = fname;
        lastName = lname;
        age = age;
        address = address;
    }

    public String printValues() {

        String data = null;

        data = "First Name :" + firstName + " Last Name :" + lastName
        + " Age : " + age + " Address : " + address;

        return data;
    }
}

我想将其对象从一个“活动”发送到另一个“,然后在另一个活动”上显示数据。

我怎样才能做到这一点?


当前回答

将对象从一个活动传递到另一个活动。

(1) 源放射性

Intent ii = new Intent(examreport_select.this,
                    BarChartActivity.class);

            ii.putExtra("IntentExamResultDetail",
                    (Serializable) your List<ArraList<String>> object here);
            startActivity(ii);

(2) 目的地活动性

List<ArrayList<String>> aa = (List<ArrayList<String>>) getIntent()
            .getSerializableExtra("IntentExamResultDetail");

其他回答

正如在评论中提到的,这个答案打破了封装并紧密耦合了组件,这很可能不是您想要的。最好的解决方案可能是使对象可Parcelable或Serializable,正如其他响应所解释的那样。话虽如此,解决方案解决了问题。所以,如果你知道你在做什么:

使用带有静态字段的类:

public class Globals {
    public static Customer customer = new Customer();
}

在活动内部,您可以使用:

活动来源:

Globals.customer = myCustomerFromActivity;

活动目标:

myCustomerTo = Globals.customer;

这是传递活动信息的简单方法。

我使用parcelable将数据从一个活动发送到另一个活动。这是我的代码,在我的项目中运行良好。

public class Channel implements Serializable, Parcelable {

    /**  */
    private static final long serialVersionUID = 4861597073026532544L;

    private String cid;
    private String uniqueID;
    private String name;
    private String logo;
    private String thumb;


    /**
     * @return The cid
     */
    public String getCid() {
        return cid;
    }

    /**
     * @param cid
     *     The cid to set
     */
    public void setCid(String cid) {
        this.cid = cid;
    }

    /**
     * @return The uniqueID
     */
    public String getUniqueID() {
        return uniqueID;
    }

    /**
     * @param uniqueID
     *     The uniqueID to set
     */
    public void setUniqueID(String uniqueID) {
        this.uniqueID = uniqueID;
    }

    /**
     * @return The name
     */
    public String getName() {
        return name;
    }

    /**
     * @param name
     *            The name to set
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * @return the logo
     */
    public String getLogo() {
        return logo;
    }

    /**
     * @param logo
     *     The logo to set
     */
    public void setLogo(String logo) {
        this.logo = logo;
    }

    /**
     * @return the thumb
     */
    public String getThumb() {
        return thumb;
    }

    /**
     * @param thumb
     *     The thumb to set
     */
    public void setThumb(String thumb) {
        this.thumb = thumb;
    }


    public Channel(Parcel in) {
        super();
        readFromParcel(in);
    }

    public static final Parcelable.Creator<Channel> CREATOR = new Parcelable.Creator<Channel>() {
        public Channel createFromParcel(Parcel in) {
            return new Channel(in);
        }

        public Channel[] newArray(int size) {

            return new Channel[size];
        }
    };

    public void readFromParcel(Parcel in) {
        String[] result = new String[5];
        in.readStringArray(result);

        this.cid = result[0];
        this.uniqueID = result[1];
        this.name = result[2];
        this.logo = result[3];
        this.thumb = result[4];
    }

    public int describeContents() {
        return 0;
    }

    public void writeToParcel(Parcel dest, int flags) {

        dest.writeStringArray(new String[] { this.cid, this.uniqueID,
                this.name, this.logo, this.thumb});
    }
}

在活动A中,如下所示:

Bundle bundle = new Bundle();
bundle.putParcelableArrayList("channel",(ArrayList<Channel>) channels);
Intent intent = new Intent(ActivityA.this,ActivityB.class);
intent.putExtras(bundle);
startActivity(intent);

在ActivityB中,使用如下方法获取数据:

Bundle getBundle = this.getIntent().getExtras();
List<Channel> channelsList = getBundle.getParcelableArrayList("channel");

是的,使用静态对象是迄今为止使用自定义非串行对象实现这一点的最简单方法。

创建自己的类Customer,如下所示:

import import java.io.Serializable;
public class Customer implements Serializable
{
    private String name;
    private String city;

    public Customer()
    {
        
    }
    public Customer(String name, String city)
    {
        this.name= name;
        this.city=city;
    }
    public String getName() 
    {
        return name;
    }
    public void setName(String name) 
    {
        this.name = name;
    }
    public String getCity() 
    {
        return city;
    }
    public void setCity(String city) 
    {
        this.city= city;
    }
    
}

在onCreate()方法中

@Override
protected void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_top);
    
    Customer cust=new Customer();
    cust.setName("abc");
    cust.setCity("xyz");
    
    Intent intent=new Intent(abc.this,xyz.class);
    intent.putExtra("bundle",cust);
    startActivity(intent); 
}

在xyz活动类中,您需要使用以下代码:

Intent intent=getIntent();
Customer cust=(Customer)intent.getSerializableExtra("bundle");
textViewName.setText(cust.getName());
textViewCity.setText(cust.getCity());

像这样创建自定义类:

public class Test implements Parcelable {
    String message;

    protected Test(Parcel in) {
        message = in.readString();
    }

    public static final Creator<Test> CREATOR = new Creator<Test>() {
        @Override
        public Test createFromParcel(Parcel in) {
            return new Test(in);
        }

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

    public String getMessage() {
        return message;
    }

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

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(message);
    }

使用Intent发送数据,如下所示:开始活动之前,必须设置一些数据

Intent intent = new Intent(context, PostDetailsActivity.class);
                intent.putExtra("data", (Parcelable) test);
                ((context)).startActivity(intent);

从以下意图中获取数据:

Test test = (Test) getIntent().getParcelableExtra("data");