Intent 页面跳转传值

最新推荐文章于 2021-06-30 16:26:35 发布

转载最新推荐文章于 2021-06-30 16:26:35 发布 · 275 阅读

文章标签：

#Android #跳转 #传值

本文详细介绍了在Android应用中使用Intent进行数据传递的方法，包括通过Intent传递字符串、整型和浮点型数据，以及如何实现Parcelable接口来传递复杂对象。文章提供了发送方和接收方的具体代码示例。

发送方：

Intent intent = new Intent();
intent.putExtra("name", "诸葛亮");
intent.putExtra("age", 50);
intent.putExtra("IQ", 200.0f);
intent.setClass(MainActivity.this, SecondActivity.class);
MainActivity.this.startActivity(intent);

接受方：

Intent intent = getIntent();
String name = intent.getStringExtra("name");
int age = intent.getIntExtra("age", 0);
float IQ = intent.getFloatExtra("IQ", 0.0f);
textview2.setText("name:"+name+",age:"+age+",IQ:"+IQ);

第四种方法：(推荐)

对象类要实现Parclelable接口

发送方：

Intent intent = new Intent();
Person person = new Person("孙悟空",500,55.6f);
intent.putExtra("person", person);
intent.setClass(MainActivity.this, SecondActivity.class);
startActivity(intent);

接受方：

Intent intent = getIntent();
Person person = intent.getParcelableExtra("person");
textview = (TextView) findViewById(R.id.textview);
textview.setText(person.toString());

对象类：

public class Person implements Parcelable {
    private String name;
    private int age;
    private float weight;

    public Person() {
        super();
        // TODO Auto-generated constructor stub
    }

    public Person(String name, int age, float weight) {
        super();
        this.name = name;
        this.age = age;
        this.weight = weight;
    }

    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 float getWeight() {
        return weight;
    }

    public void setWeight(float weight) {
        this.weight = weight;
    }

    @Override
    public String toString() {
        return "Person [name=" + name + ", age=" + age + ", weight=" + weight + "]";
    }

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

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(name);
        dest.writeInt(age);
        dest.writeFloat(weight);
    }

    public static final Parcelable.Creator<Person> CREATOR = new Parcelable.Creator<Person>() {
        public Person createFromParcel(Parcel in) {
            return new Person(in);
        }

        public Person[] newArray(int size) {
            return new Person[size];
        }
    };

    private Person(Parcel in) {
        name = in.readString();
        age = in.readInt();
        weight = in.readFloat();
    }
}