Start another activity from this activity pass parameters via Bundle Object

Intent intent = new Intent(this, YourActivity.class);
Intent.putExtra(AppConstants.EXTRAS.MODEL, cModel);
startActivity(intent);
Retrieve on another activity (YourActivity)

ContentResultData cModel = getIntent().getParcelableExtra(AppConstants.EXTRAS.MODEL);

对于你知道要在应用程序中传递数据的情况，使用“全局变量”(比如静态类)

以下是Dianne Hackborn (hackbod -谷歌安卓软件工程师)对此事的看法:

For situations where you know the activities are running in the same process, you can just share data through globals. For example, you could have a global HashMap<String, WeakReference<MyInterpreterState>> and when you make a new MyInterpreterState come up with a unique name for it and put it in the hash map; to send that state to another activity, simply put the unique name into the hash map and when the second activity is started it can retrieve the MyInterpreterState from the hash map with the name it receives.

你可以使用putExtra(Serializable..)和getSerializableExtra()方法来传递和检索你的类类型的对象;你必须将你的类标记为Serializable，并确保你所有的成员变量也是Serializable…

在臂膀上

在build.gradle中添加kotlin扩展。

apply plugin: 'kotlin-android-extensions'

android {
    androidExtensions {
        experimental = true
   }
}

然后像这样创建数据类。

@Parcelize
data class Sample(val id: Int, val name: String) : Parcelable

传递带有意图的对象

val sample = Sample(1,"naveen")

val intent = Intent(context, YourActivity::class.java)
    intent.putExtra("id", sample)
    startActivity(intent)

获取带有意图的对象

val sample = intent.getParcelableExtra("id")

创建Android应用程序

文件>>新建>> Android应用程序

输入项目名称:android-pass-object-to-activity

Pakcage: com.hmkcode.android

保持其他默认选择，点击下一步直到完成

在开始创建应用程序之前，我们需要创建POJO类“Person”，我们将使用它将对象从一个活动发送到另一个活动。注意，该类正在实现Serializable接口。

将位于

package com.hmkcode.android;
import java.io.Serializable;

public class Person implements Serializable{

    private static final long serialVersionUID = 1L;

    private String name;
    private int age;

        // getters & setters....

    @Override
    public String toString() {
        return "Person [name=" + name + ", age=" + age + "]";
    }   
}

两个活动的两种布局

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:id="@+id/tvName"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center_horizontal"
        android:text="Name" />

    <EditText
        android:id="@+id/etName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        android:ems="10" >
        <requestFocus />
    </EditText>
</LinearLayout>

<LinearLayout
     android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
<TextView
    android:id="@+id/tvAge"
    android:layout_width="100dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:gravity="center_horizontal"
    android:text="Age" />
<EditText
    android:id="@+id/etAge"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:ems="10" />
</LinearLayout>

<Button
    android:id="@+id/btnPassObject"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:text="Pass Object to Another Activity" />

</LinearLayout>

activity_another.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
 >

<TextView
    android:id="@+id/tvPerson"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    android:layout_gravity="center"
    android:gravity="center_horizontal"
 />

</LinearLayout>

两个活动类别

1)ActivityMain.java

package com.hmkcode.android;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity implements OnClickListener {

Button btnPassObject;
EditText etName, etAge;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btnPassObject = (Button) findViewById(R.id.btnPassObject);
    etName = (EditText) findViewById(R.id.etName);
    etAge = (EditText) findViewById(R.id.etAge);

    btnPassObject.setOnClickListener(this);
}

@Override
public void onClick(View view) {

    // 1. create an intent pass class name or intnet action name 
    Intent intent = new Intent("com.hmkcode.android.ANOTHER_ACTIVITY");

    // 2. create person object
    Person person = new Person();
    person.setName(etName.getText().toString());
    person.setAge(Integer.parseInt(etAge.getText().toString()));

    // 3. put person in intent data
    intent.putExtra("person", person);

    // 4. start the activity
    startActivity(intent);
}

}

2)AnotherActivity.java

package com.hmkcode.android;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class AnotherActivity extends Activity {

TextView tvPerson;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_another);

    // 1. get passed intent 
    Intent intent = getIntent();

    // 2. get person object from intent
    Person person = (Person) intent.getSerializableExtra("person");

    // 3. get reference to person textView 
    tvPerson = (TextView) findViewById(R.id.tvPerson);

    // 4. display name & age on textView 
    tvPerson.setText(person.toString());

}
}

如果你有一个单例类(fx Service)作为你的模型层的网关，它可以通过在该类中有一个带有getter和setter的变量来解决。

活动一:

Intent intent = new Intent(getApplicationContext(), Activity2.class);
service.setSavedOrder(order);
startActivity(intent);

活动二:

private Service service;
private Order order;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_quality);

    service = Service.getInstance();
    order = service.getSavedOrder();
    service.setSavedOrder(null) //If you don't want to save it for the entire session of the app.
}

在服务:

private static Service instance;

private Service()
{
    //Constructor content
}

public static Service getInstance()
{
    if(instance == null)
    {
        instance = new Service();
    }
    return instance;
}
private Order savedOrder;

public Order getSavedOrder()
{
    return savedOrder;
}

public void setSavedOrder(Order order)
{
    this.savedOrder = order;
}

此解决方案不需要对相关对象进行任何序列化或其他“打包”。但是，只有在使用这种架构时才会有好处。