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.

我使用Gson及其强大而简单的api在活动之间发送对象，

例子

// This is the object to be sent, can be any object
public class AndroidPacket {

    public String CustomerName;

   //constructor
   public AndroidPacket(String cName){
       CustomerName = cName;
   }   
   // other fields ....


    // You can add those functions as LiveTemplate !
    public String toJson() {
        Gson gson = new Gson();
        return gson.toJson(this);
    }

    public static AndroidPacket fromJson(String json) {
        Gson gson = new Gson();
        return gson.fromJson(json, AndroidPacket.class);
    }
}

2个函数，你将它们添加到你想要发送的对象中

使用

将对象从A发送到B

    // Convert the object to string using Gson
    AndroidPacket androidPacket = new AndroidPacket("Ahmad");
    String objAsJson = androidPacket.toJson();

    Intent intent = new Intent(A.this, B.class);
    intent.putExtra("my_obj", objAsJson);
    startActivity(intent);

在B接收

@Override
protected void onCreate(Bundle savedInstanceState) {        
    Bundle bundle = getIntent().getExtras();
    String objAsJson = bundle.getString("my_obj");
    AndroidPacket androidPacket = AndroidPacket.fromJson(objAsJson);

    // Here you can use your Object
    Log.d("Gson", androidPacket.CustomerName);
}

我几乎在我做的每个项目中都使用它，我没有任何性能问题。

谢谢你的帮助，但我发现了一个可选的解决方案

 public class getsetclass implements Serializable {
        private int dt = 10;
    //pass any object, drwabale 
        public int getDt() {
            return dt;
        }

        public void setDt(int dt) {
            this.dt = dt;
        }
    }

活动一

getsetclass d = new getsetclass ();
                d.setDt(50);
                LinkedHashMap<String, Object> obj = new LinkedHashMap<String, Object>();
                obj.put("hashmapkey", d);
            Intent inew = new Intent(SgParceLableSampelActivity.this,
                    ActivityNext.class);
            Bundle b = new Bundle();
            b.putSerializable("bundleobj", obj);
            inew.putExtras(b);
            startActivity(inew);

在活动2中获取数据

 try {  setContentView(R.layout.main);
            Bundle bn = new Bundle();
            bn = getIntent().getExtras();
            HashMap<String, Object> getobj = new HashMap<String, Object>();
            getobj = (HashMap<String, Object>) bn.getSerializable("bundleobj");
            getsetclass  d = (getsetclass) getobj.get("hashmapkey");
        } catch (Exception e) {
            Log.e("Err", e.getMessage());
        }

如果你对putExtra特性的使用不是很特别，只是想启动另一个带有对象的活动，你可以查看我写的GNLauncher (https://github.com/noxiouswinter/gnlib_android/wiki#gnlauncher)库，它试图使这个过程更直接。

GNLauncher可以将对象/数据从另一个活动发送到一个活动，就像调用活动中的函数一样简单，并将所需的数据作为参数。它引入了类型安全，并消除了必须序列化的所有麻烦，使用字符串键附加到意图，并在另一端撤销相同的操作。

我知道有点晚了，但很简单。你所要做的就是让你的类实现Serializable

public class MyClass implements Serializable{

}

然后你可以传递给一个意图，比如

Intent intent=......
MyClass obje=new MyClass();
intent.putExtra("someStringHere",obje);

要得到它，你只需打电话

MyClass objec=(MyClass)intent.getExtra("theString");