package com.gaojinhua.android.activitymsg;

 import android.content.Intent;

 import android.os.Bundle;

 import android.support.v7.app.AppCompatActivity;

 import android.view.View;

 import android.widget.EditText;

 import android.widget.TextView;

 import android.widget.Toast;

 import java.util.regex.Pattern;

 public class MainActivity extends AppCompatActivity {

     public static final String DATA = "data";

     private EditText etName;

     private EditText etAge;

     private TextView textView;

     private User user;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         etName = (EditText) findViewById(R.id.etName);

         etAge = (EditText) findViewById(R.id.etAge);

         textView = (TextView) findViewById(R.id.textView);

         findViewById(R.id.btnStartSecond).setOnClickListener(new View.OnClickListener() {

             @Override

             public void onClick(View v) {

                 if (Pattern.compile("[a-zA-Z]+").matcher(etName.getText().toString()).matches() &&

                         Pattern.compile("[0-9]+").matcher(etAge.getText().toString()).matches()) {

                     user = new User(etName.getText().toString(), Integer.parseInt(etAge.getText().toString()));

                     Bundle b = new Bundle();

                     b.putParcelable(DATA, user);

                     Intent i = new Intent(MainActivity.this, SecondActivity.class);

                     i.putExtras(b);

                     startActivityForResult(i, 0);

                 } else {

                     Toast.makeText(getApplicationContext(), "请输入完整或正确的数据", Toast.LENGTH_SHORT).show();

                 }

             }

         });

     }

     @Override

     protected void onActivityResult(int requestCode, int resultCode, Intent data) {

         super.onActivityResult(requestCode, resultCode, data);

         textView.setText("另一个Activity返回的数据是：" + data.getExtras().getString(DATA));

     }

 }

 package com.gaojinhua.android.activitymsg;

 import android.content.Intent;

 import android.os.Bundle;

 import android.support.v7.app.AppCompatActivity;

 import android.view.View;

 import android.widget.TextView;

 public class SecondActivity extends AppCompatActivity {

     private TextView textViewAty;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_second);

         Intent i = getIntent();

         Bundle b = i.getExtras();

         User user = b.getParcelable(MainActivity.DATA);

         textViewAty = (TextView) findViewById(R.id.textViewAty);

         textViewAty.setText(String.format("User info(name=%s,age=%d)", user.getName(), user.getAge()));

         findViewById(R.id.btnBack).setOnClickListener(new View.OnClickListener() {

             @Override

             public void onClick(View v) {

                 Intent i = new Intent();

                 Bundle b = new Bundle();

                 b.putString(MainActivity.DATA, textViewAty.getText().toString());

                 i.putExtras(b);

                 setResult(1, i);

                 finish();

             }

         });

     }

 }

 package com.gaojinhua.android.activitymsg;

 import android.os.Parcel;

 import android.os.Parcelable;

 /**

  * Created by Gaojinhua on 2015/8/14.

  */

 public class User implements Parcelable {

     public static final Creator<User> CREATOR = new Creator<User>() {

         @Override

         public User createFromParcel(Parcel source) {

             return new User(source.readString(), source.readInt());

         }

         @Override

         public User[] newArray(int size) {

             return new User[size];

         }

     };

     private String name;

     private int age;

     public User(String name, int age) {

         this.name = name;

         this.age = age;

     }

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this.name = name;

     }

     public int getAge() {

         return age;

     }

     public void setAge(int age) {

         this.age = age;

     }

     @Override

     public int describeContents() {

         return 0;

     }

     @Override

     public void writeToParcel(Parcel dest, int flags) {

         dest.writeString(getName());

         dest.writeInt(getAge());

     }

 }