我需要通过intent将一个类对象传递给另一个activity。以下是我的类代码：
public class Model
{
private String Name;
private ArrayList<Trim> trim;
public String getName()
{
return Name;
}
public void setName(String Name)
{
this.Name = Name;
}
public ArrayList<Trim> getTrim()
{
return trim;
}
public void setTrim(ArrayList<Trim> trim)
{
this.trim = trim;
}
}
要将一个对象传递给另一个活动，您需要实现Parcelable。
仔细阅读为Android编写Parcelable类。在此，他们使用HashMap来存储值并将对象传递给另一个类。
创建一个名为ObjectA的类。在该类中，我使用了所有setter和getter方法。
package com.ParcableExample.org;
import android.os.Parcel;
import android.os.Parcelable;
/**
* A basic object that can be parcelled to
* transfer between objects.
*/
public class ObjectA implements Parcelable
{
private String strValue = null;
private int intValue = 0;
/**
* Standard basic constructor for non-parcel
* object creation.
*/
public ObjectA()
{
}
/**
*
* Constructor to use when re-constructing object
* from a parcel.
*
* @param in a parcel from which to read this object.
*/
public ObjectA(Parcel in)
{
readFromParcel(in);
}
/**
* Standard getter
*
* @return strValue
*/
public String getStrValue()
{
return this.strValue;
}
/**
* Standard setter
*
* @param strValue
*/
public void setStrValue(String strValue)
{
this.strValue = strValue;
}
/**
* Standard getter
*
* @return intValue
*/
public Integer getIntValue()
{
return this.intValue;
}
/**
* Standard setter
*
* @param strValue
*/
public void setIntValue(Integer intValue)
{
this.intValue = intValue;
}
@Override
public int describeContents()
{
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags)
{
// We just need to write each field into the
// parcel. When we read from parcel, they
// will come back in the same order
dest.writeString(this.strValue);
dest.writeInt(this.intValue);
}
/**
*
* Called from the constructor to create this
* object from a parcel.
*
* @param in parcel from which to re-create object.
*/
public void readFromParcel(Parcel in)
{
// We just need to read back each
// field in the order that it was
// written to the parcel
this.strValue = in.readString();
this.intValue = in.readInt();
}
/**
*
* This field is needed for Android to be able to
* create new objects, individually or as arrays.
*
* This also means that you can use use the default
* constructor to create the object and use another
* method to hyrdate it as necessary.
*/
@SuppressWarnings("unchecked")
public static final Parcelable.Creator CREATOR = new Parcelable.Creator()
{
@Override
public ObjectA createFromParcel(Parcel in)
{
return new ObjectA(in);
}
@Override
public Object[] newArray(int size)
{
return new ObjectA[size];
}
};
}
然后创建一个Activity，用于将对象发送到另一个Activity。
package com.ParcableExample.org;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class ParcableExample extends Activity
{
private Button btnClick;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initControls();
}
private void initControls()
{
btnClick = (Button)findViewById(R.id.btnClick);
btnClick.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View arg0)
{
ObjectA obj = new ObjectA();
obj.setIntValue(1);
obj.setStrValue("Chirag");
Intent i = new Intent(ParcableExample.this,MyActivity.class);
i.putExtra("com.package.ObjectA", obj);
startActivity(i);
}
});
}
}
现在最后创建另一个活动，读取对象并从中获取值。
package com.ParcableExample.org;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
public class MyActivity extends Activity
{
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Bundle bundle = getIntent().getExtras();
ObjectA obj = bundle.getParcelable("com.package.ObjectA");
Log.i("---------- Id ",":: "+obj.getIntValue());
Log.i("---------- Name ",":: "+obj.getStrValue());
}
}
您需要在Model类中实现Serializable接口。然后，在源Activity中使用以下代码将Model对象传递到目标Activity：
Model objModel = new Model();
Intent modelActivity = (Model.this, detail.class);
intent.putExtra("ModelObject", objModel);
以下是目标Activity中的代码：
Model modelObject = getIntent().getSerializableExtra("ModelObject");
你的类应该实现 Parcelable 接口，然后你就可以使用以下方式将它发送到另一个 Activity：
MyClass myObject;
//...
intent=new Intent(this, MyAnotherActivity.class);
intent.putExtra("mydata", (Parcelable )myObject);
this.startActivity(intent);