Intent 传递对象和集合

两个Activity跳转的时候，相互之间传递对象数据，这种需求还是比较常见的，本文实现了在开启新Activity的同时传递对象参数。

如果对序列化和反序列化不太理解，可以参考这篇文章<java序列化和反序列化的简单理解>。

首先是效果图:

废话不多说直接展示代码

1.SendActivity.java的内容：

public class SendActivity extends Activity implements OnClickListener {

	Button btn_serializable;
	Button btn_parcelable;
	Button btn_sendList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_send);
        btn_serializable = (Button) findViewById(R.id.btn_serializable);
        btn_parcelable = (Button) findViewById(R.id.btn_parcelable);
        btn_sendList =  (Button) findViewById(R.id.btn_sendList);
        btn_serializable.setOnClickListener(this);
        btn_parcelable.setOnClickListener(this);
        btn_sendList.setOnClickListener(this);
    }

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.btn_serializable:
			sendSerializableObject();
			break;
		case R.id.btn_parcelable:
			sendParcelableObject();
			break;
		case R.id.btn_sendList:
			sendSerializableList();
			break;
		default:
			break;
		}
	}

	private void sendSerializableObject(){
		Intent intent = new Intent(this,ReceiveSerActivity.class);
		UserBySerializable user = new UserBySerializable();
		user.setUserName("张三");
		user.setPassword(19940306);
//		Bundle bundle = new Bundle();
//		bundle.putSerializable("user", user);
//		intent.putExtras(bundle);
		intent.putExtra("user", user);
		startActivity(intent);
	}

	private void sendParcelableObject(){
		Intent intent = new Intent(this,ReceiveParActivity.class);
		UserByParcelable user = new UserByParcelable();
		user.setUserName("李四");
		user.setPassword(19930708);
//		Bundle bundle = new Bundle();
//		bundle.putParcelable("user", user);
//		intent.putExtras(bundle);
		intent.putExtra("user", user);
		startActivity(intent);
	}

	private void sendSerializableList(){
		Intent intent = new Intent(this,ReceiveListActivity.class);
		List<UserBySerializable> list = new ArrayList<UserBySerializable>();
		UserBySerializable user01 = new UserBySerializable();
		user01.setUserName("一号成员");
		user01.setPassword(10000001);
		list.add(user01);
		UserBySerializable user02 = new UserBySerializable();
		user02.setUserName("二号成员");
		user02.setPassword(10000002);
		list.add(user02);
		UserBySerializable user03 = new UserBySerializable();
		user03.setUserName("三号成员");
		user03.setPassword(10000003);
		list.add(user03);
		intent.putExtra("userList", (Serializable)list);
		startActivity(intent);
	}
}

2.UserBySerializable对象：

public class UserBySerializable implements Serializable {
	private static final long serialVersionUID = -7060210544600464481L;
    private String userName;
    private int password;
    public void setUserName(String value)
    {
        userName = value;
    }
    public String getUserName()
    {
        return userName;
    }
	public int getPassword() {
		return password;
	}
	public void setPassword(int password) {
		this.password = password;
	}
}

3.UserByParcelable对象

public class UserByParcelable implements Parcelable {
    private String userName;
    private int password;    

    public void setUserName(String value)
    {
        userName = value;
    }
    public String getUserName()
    {
        return userName;
    }  

    public int getPassword() {
		return password;
	}
	public void setPassword(int password) {
		this.password = password;
	}

	public static final Parcelable.Creator<UserByParcelable> CREATOR = new Creator<UserByParcelable>() {
        public UserByParcelable createFromParcel(Parcel source) {
        	UserByParcelable mUser = new UserByParcelable();
            mUser.userName = source.readString();
            mUser.password = source.readInt();
            return mUser;
        }
        public UserByParcelable[] newArray(int size) {
            return new UserByParcelable[size];
        }
    };  

    public int describeContents() {
        return 0;
    }
    public void writeToParcel(Parcel parcel, int flags) {
        parcel.writeString(userName);
        parcel.writeInt(password);
    }
}

这是最需要注意的三个部分，其余部分就不展示出来了，直接给大家Demo源码自己研究一下吧！点击打开链接