Activity之间传递数据或数据包Bundle

 1 package com.gaojinhua.android.activitymsg;
 2 
 3 import android.content.Intent;
 4 import android.os.Bundle;
 5 import android.support.v7.app.AppCompatActivity;
 6 import android.view.View;
 7 import android.widget.EditText;
 8 import android.widget.TextView;
 9 
10 public class MainActivity extends AppCompatActivity {
11     private EditText etName;
12     private EditText etAge;
13     private TextView textView;
14     public static final String DATA = "data";
15 
16     @Override
17     protected void onCreate(Bundle savedInstanceState) {
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.activity_main);
20         findViewById(R.id.btnStartAty).setOnClickListener(new View.OnClickListener() {
21             @Override
22             public void onClick(View v) {
23                 etName = (EditText) findViewById(R.id.etName);
24                 etAge = (EditText) findViewById(R.id.etAge);
25                 textView = (TextView) findViewById(R.id.textView);
26                 User user = new User(etName.getText().toString(), Integer.parseInt(etAge.getText().toString()));
27                 Bundle b = new Bundle();
28                 b.putParcelable(DATA, user);
29                 Intent i = new Intent(MainActivity.this, Aty.class);
30                 i.putExtras(b);
31                 startActivityForResult(i, 0);
32             }
33         });
34     }
35 
36     @Override
37     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
38         super.onActivityResult(requestCode, resultCode, data);
39         textView.setText("另一个Activity返回的数据是：" + data.getExtras().getString(DATA));
40     }
41 
42 
43 }

 1 package com.gaojinhua.android.activitymsg;
 2 
 3 import android.content.Intent;
 4 import android.os.Bundle;
 5 import android.support.v7.app.AppCompatActivity;
 6 import android.view.View;
 7 import android.widget.TextView;
 8 
 9 public class Aty extends AppCompatActivity {
10     private TextView textViewAty;
11 
12     @Override
13     protected void onCreate(Bundle savedInstanceState) {
14         super.onCreate(savedInstanceState);
15         setContentView(R.layout.activity_aty);
16         Intent i = getIntent();
17         textViewAty = (TextView) findViewById(R.id.textViewAty);
18         Bundle b = i.getExtras();
19         User user = b.getParcelable(MainActivity.DATA);
20         textViewAty.setText(String.format("User info(name=%s,age=%d)", user.getName(), user.getAge()));
21 
22         findViewById(R.id.btnBack).setOnClickListener(new View.OnClickListener() {
23             @Override
24             public void onClick(View v) {
25                 Intent i = new Intent();
26                 Bundle b = new Bundle();
27                 b.putString(MainActivity.DATA, textViewAty.getText().toString());
28                 i.putExtras(b);
29                 setResult(1, i);
30                 finish();
31             }
32         });
33     }
34 
35 }

 1 package com.gaojinhua.android.activitymsg;
 2 
 3 import android.os.Parcel;
 4 import android.os.Parcelable;
 5 
 6 /**
 7  * Created by Gaojinhua on 2015/8/14.
 8  */
 9 public class User implements Parcelable {
10     private String name;
11     private int age;
12 
13     public User(String name, int age) {
14         this.name = name;
15         this.age = age;
16     }
17 
18 
19     public void setName(String name) {
20         this.name = name;
21     }
22 
23     public String getName() {
24         return name;
25     }
26 
27     public void setAge(int age) {
28         this.age = age;
29     }
30 
31     public int getAge() {
32         return age;
33     }
34 
35     @Override
36     public int describeContents() {
37         return 0;
38     }
39 
40     @Override
41     public void writeToParcel(Parcel dest, int flags) {
42         dest.writeString(getName());
43         dest.writeInt(getAge());
44     }
45 
46     public static final Creator<User> CREATOR = new Creator<User>() {
47         @Override
48         public User createFromParcel(Parcel source) {
49             return new User(source.readString(), source.readInt());
50         }
51 
52         @Override
53         public User[] newArray(int size) {
54             return new User[size];
55         }
56     };
57 
58 
59 }

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical"
 6     android:paddingBottom="@dimen/activity_vertical_margin"
 7     android:paddingLeft="@dimen/activity_horizontal_margin"
 8     android:paddingRight="@dimen/activity_horizontal_margin"
 9     android:paddingTop="@dimen/activity_vertical_margin"
10     tools:context=".MainActivityFragment">
11 
12     <EditText
13         android:id="@+id/etName"
14         android:layout_width="fill_parent"
15         android:layout_height="wrap_content"
16         android:hint="请输入您的名字"
17         android:singleLine="true"
18         android:text="" />
19 
20     <EditText
21         android:id="@+id/etAge"
22         android:layout_width="fill_parent"
23         android:layout_height="wrap_content"
24         android:hint="请输入你的年龄"
25         android:singleLine="true"
26         android:text="" />
27 
28     <Button
29         android:id="@+id/btnStartAty"
30         android:layout_width="wrap_content"
31         android:layout_height="wrap_content"
32         android:layout_alignParentLeft="true"
33         android:layout_alignParentStart="true"
34         android:layout_below="@+id/et"
35         android:layout_marginTop="126dp"
36         android:text="下一页" />
37 
38     <TextView
39         android:id="@+id/textView"
40         android:layout_width="wrap_content"
41         android:layout_height="wrap_content" />
42 
43 
44 </LinearLayout>

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical"
 6     android:paddingBottom="@dimen/activity_vertical_margin"
 7     android:paddingLeft="@dimen/activity_horizontal_margin"
 8     android:paddingRight="@dimen/activity_horizontal_margin"
 9     android:paddingTop="@dimen/activity_vertical_margin"
10     tools:context="com.gaojinhua.android.activitymsg.AtyFragment">
11 
12     <TextView
13         android:id="@+id/textViewAty"
14         android:layout_width="wrap_content"
15         android:layout_height="wrap_content"
16         android:text="" />
17 
18     <Button
19         android:id="@+id/btnBack"
20         android:layout_width="wrap_content"
21         android:layout_height="wrap_content"
22         android:text="回到上一页" />
23 
24 
25 </LinearLayout>