通过intent传递自定义对象的方法是实现类似于下面给出的事务类的parcelable接口。
使事务类像下面给出的代码段一样可打包

import android.os.Parcel;
import android.os.Parcelable;

public class `Transaction` implements Parcelable {
    private float value;
    private int transaction_Date;
    private String description;

    public Transaction(float value, int transaction_Date, String description) {
        super();
        this.value = value;
        this.transaction_Date = transaction_Date;
        this.description = description;
    }

    public float getValue() {
        return value;
    }

    public int getTransaction_Date() {
        return transaction_Date;
    }

    public String getDescription() {
        return description;
    }

    public void setValue(float value) {
        this.value = value;
    }

    public void setTransaction_Date(int transaction_Date) {
        this.transaction_Date = transaction_Date;
    }

    public void setDescription(String description) {
        this.description = description;
    }

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

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeFloat(this.value);
        dest.writeInt(this.transaction_Date);
        dest.writeString(this.description);
    }

    protected Transaction(Parcel in) {
        this.value = in.readFloat();
        this.transaction_Date = in.readInt();
        this.description = in.readString();
    }

    public static final Parcelable.Creator<Transaction> CREATOR = new Parcelable.Creator<Transaction>() {
        @Override
        public Transaction createFromParcel(Parcel source) {
            return new Transaction(source);
        }

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

将可包裹的物体放入下面给出的意图中

public class AddMoneyTransaction extends AppCompatActivity implements View.OnClickListener {

        Button addDepositButton;
        EditText depositInput, depositInputDate, depositInputNote;

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

            //setup the Button and EditText

            addDepositButton = (Button)findViewById(R.id.addDepositButton);
            depositInput = (EditText) findViewById(R.id.depositInput);
            depositInputDate = (EditText) findViewById(R.id.depositInputDate);
            depositInputNote = (EditText) findViewById(R.id.depositInputNote);

            //get the onClickListener
            addDepositButton.setOnClickListener(this);

        }

        @Override
        public void onClick(View view) {
            Intent depositIntent = new Intent(AddMoneyTransaction.this, AssetsOverview.class);
           Transaction deposit = new Transaction(100, 16, "random comment");
           deposit.setValue(Float.parseFloat(depositInput.getText().toString()));
           deposit.setTransaction_Date(
Integer.parseInt(depositInputDate.getText().toString()));
           deposit.setDescription(depositInputNote.getText().toString());
           depositIntent.putExtra("data",deposit);
           startActivity(depositIntent);
        }

并接受以下意图

//populated transaction list

protected void populateTransactionList() {

    Intent depositIntent = getIntent();
    Transaction deposit = depositIntent.getParcelableExtra("data");
}

Transaction deposit = (Transaction) getIntent().getExtras();

临时演员是 Bundle . 你知道这一点，因为你有：

depositIntent.putExtras(depositBundle);

来填补那些额外的空缺。
自从你打电话来 putFloat("value", ...) , putInt("date", ...) ，和 putString("description", ...) 在那上面 Bundle ，您将使用关联的getter根据这些键从extra中检索值。这可以通过以下方式实现：
打电话 getFloatExtra() , getIntExtra() ，和 getStringExtra() 直接在 Intent 退回人 getIntent() ，或
去拿那个 Bundle 通过 getIntent().getExtras() ，然后打电话 getFloat() , getInt() ，和 getString() 上 Bundle 一 Transaction 不能进入extras，因为不能将任意java对象放入extras。你可以让 Transaction 实施 Parcelable ，在这种情况下，你可以把它直接放入额外的。