一、传递基本类型数据

（一）编辑MainActivity

• 代码：

import androidx.appcompat.app.AppCompatActivity;import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;public class MainActivity extends AppCompatActivity {Button btn_submit;EditText name_edit;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btn_submit = (Button) findViewById(R.id.btn_submit);name_edit = (EditText) findViewById(R.id.name_edit);btn_submit.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v){Intent intent = new Intent();intent.setClass(MainActivity.this,InfoActivity.class);String name = name_edit.getText().toString();intent.putExtra("name",name);startActivity(intent);}});}
}

（二）编辑InfoActivity

• 代码：

import androidx.appcompat.app.AppCompatActivity;import android.os.Bundle;
import android.widget.TextView;public class InfoActivity extends AppCompatActivity {TextView infoshow;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_info);infoshow = (TextView) findViewById(R.id.infoshow);Bundle bundle = getIntent().getExtras();String name = bundle.getString("name");infoshow.setText(name);}
}

（三）布局

• activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><EditTextandroid:id="@+id/name_edit"android:layout_width="match_parent"android:layout_height="43dp"tools:layout_editor_absoluteX="156dp"tools:layout_editor_absoluteY="64dp"android:hint="  姓名"tools:ignore="MissingConstraints" /><Buttonandroid:id="@+id/btn_submit"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_x="268dp"android:layout_y="209dp"android:text="查看"tools:ignore="MissingConstraints"tools:layout_editor_absoluteX="161dp"tools:layout_editor_absoluteY="123dp"android:layout_weight="1"/>
</AbsoluteLayout>

• activity_info.xml:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".InfoActivity"><TextViewandroid:id="@+id/infoshow"android:layout_width="wrap_content"android:layout_height="wrap_content"android:textColor="@color/black"android:textSize="25sp"tools:ignore="MissingConstraints"tools:layout_editor_absoluteX="151dp"tools:layout_editor_absoluteY="2dp" />
</androidx.constraintlayout.widget.ConstraintLayout>

(四)效果

注：模拟机上只能输入数字及英文，想测中文建议真机调试。

二、传递对象

（一）创建类

• 右键→New→Java Class:
  
• 编写Student类：
  
• 设置接口：右键→Generate…→Getter and Setter
  
  
• Student类代码：

import java.io.Serializable;public class Student implements Serializable {private  String name;private  int age;private  String score;Student(String name,int age,String score){this.name=name;this.age=age;this.score=score;}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;}public String getScore() {return score;}public void setScore(String score) {this.score = score;}
}

（二）编辑MainActivity

• 代码：

import androidx.appcompat.app.AppCompatActivity;import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;public class MainActivity extends AppCompatActivity {Button btn_submit;EditText name_edit;EditText age_edit;EditText score_edit;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btn_submit = (Button) findViewById(R.id.btn_submit);name_edit = (EditText) findViewById(R.id.name_edit);age_edit = (EditText) findViewById(R.id.age_edit);score_edit = (EditText) findViewById(R.id.score_edit);btn_submit.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v){Intent intent = new Intent();intent.setClass(MainActivity.this,InfoActivity.class);String name = name_edit.getText().toString();int age = Integer.parseInt(age_edit.getText().toString());String score = score_edit.getText().toString();Student s = new Student(name,age,score);intent.putExtra("student",s);startActivity(intent);}});}
}

（三）编辑InfoActivity

• 代码：

import androidx.appcompat.app.AppCompatActivity;import android.os.Bundle;
import android.widget.TextView;public class InfoActivity extends AppCompatActivity {TextView infoshow;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_info);infoshow = (TextView) findViewById(R.id.infoshow);Bundle bundle = getIntent().getExtras();Student s = (Student) bundle.get("student");infoshow.setText("姓名："+s.getName()+"   年纪："+s.getAge()+"   专业："+s.getScore()+"\n");}
}

（四）布局

• activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><EditTextandroid:id="@+id/name_edit"android:layout_width="match_parent"android:layout_height="43dp"tools:layout_editor_absoluteX="156dp"tools:layout_editor_absoluteY="64dp"android:hint="  姓名"tools:ignore="MissingConstraints" /><EditTextandroid:id="@+id/age_edit"android:layout_width="match_parent"android:layout_height="43dp"android:layout_x="0dp"android:layout_y="65dp"android:hint="  年纪"android:inputType="number"tools:ignore="MissingConstraints"tools:layout_editor_absoluteX="156dp"tools:layout_editor_absoluteY="64dp" /><EditTextandroid:id="@+id/score_edit"android:layout_width="match_parent"android:layout_height="43dp"android:layout_x="2dp"android:layout_y="129dp"android:hint="  专业"tools:ignore="MissingConstraints"tools:layout_editor_absoluteX="156dp"tools:layout_editor_absoluteY="64dp" /><Buttonandroid:id="@+id/btn_submit"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_x="268dp"android:layout_y="209dp"android:text="查看"tools:ignore="MissingConstraints"tools:layout_editor_absoluteX="161dp"tools:layout_editor_absoluteY="123dp"android:layout_weight="1"/>
</AbsoluteLayout>

• activity_info.xml代码不变

（五）效果

三、传递集合

（一）编辑MainActivity

• 代码：

import androidx.appcompat.app.AppCompatActivity;import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.EditText;import java.util.ArrayList;public class MainActivity extends AppCompatActivity {Button btn_submit;Button btn_save;EditText name_edit;EditText age_edit;EditText score_edit;ArrayList<Student> students = new ArrayList<Student>();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btn_submit = (Button) findViewById(R.id.btn_submit);btn_save = (Button) findViewById(R.id.btn_save);name_edit = (EditText) findViewById(R.id.name_edit);age_edit = (EditText) findViewById(R.id.age_edit);score_edit = (EditText) findViewById(R.id.score_edit);btn_save.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {String name = name_edit.getText().toString();int age = Integer.parseInt(age_edit.getText().toString());String score = score_edit.getText().toString();Student s = new Student(name,age,score);students.add(s);name_edit.setText("");age_edit.setText("");score_edit.setText("");}});btn_submit.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v){Intent intent = new Intent();intent.setClass(MainActivity.this,InfoActivity.class);intent.putExtra("students",students);startActivity(intent);}});}
}

（二）编辑InfoActivity

• 代码：

package com.example.phone4;import androidx.appcompat.app.AppCompatActivity;import android.os.Bundle;
import android.widget.TextView;import java.util.ArrayList;public class InfoActivity extends AppCompatActivity {TextView infoshow;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_info);infoshow = (TextView) findViewById(R.id.infoshow);Bundle bundle = getIntent().getExtras();ArrayList<Student> students =(ArrayList<Student>) bundle.get("students");for (Student s:students){infoshow.append("姓名："+s.getName()+"   年纪："+s.getAge()+"   专业："+s.getScore()+"\n");}}
}

（三）布局

• activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".InfoActivity"><EditTextandroid:id="@+id/name_edit"android:layout_width="match_parent"android:layout_height="43dp"tools:layout_editor_absoluteX="156dp"tools:layout_editor_absoluteY="64dp"android:hint="  姓名"tools:ignore="MissingConstraints" /><EditTextandroid:id="@+id/age_edit"android:layout_width="match_parent"android:layout_height="43dp"android:layout_x="0dp"android:layout_y="65dp"android:hint="  年纪"android:inputType="number"tools:ignore="MissingConstraints"tools:layout_editor_absoluteX="156dp"tools:layout_editor_absoluteY="64dp" /><EditTextandroid:id="@+id/score_edit"android:layout_width="match_parent"android:layout_height="43dp"android:layout_x="2dp"android:layout_y="129dp"android:hint="  专业"android:inputType="text"tools:ignore="MissingConstraints"tools:layout_editor_absoluteX="156dp"tools:layout_editor_absoluteY="64dp" /><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:layout_x="3dp"android:layout_y="178dp"android:orientation="horizontal"><Buttonandroid:id="@+id/btn_submit"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_x="268dp"android:layout_y="209dp"android:text="查看"tools:ignore="MissingConstraints"tools:layout_editor_absoluteX="161dp"tools:layout_editor_absoluteY="123dp"android:layout_weight="1"/><Buttonandroid:id="@+id/btn_save"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_x="58dp"android:layout_y="211dp"android:text="保存"tools:ignore="MissingConstraints"tools:layout_editor_absoluteX="161dp"tools:layout_editor_absoluteY="123dp"android:layout_weight="1"/></LinearLayout>
</AbsoluteLayout>

• activity_info.xml代码不变

（四）真机效果