Parcelable实现数据组件的数据传递

迷南。 2022-06-10 04:12 172阅读 0赞

**FirstActivity.java**

package com.sdutacm.getcontextskillpractise;
    
    import android.content.Intent;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    
    public class FirstActivity extends AppCompatActivity {
        
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Person person = new Person();
            person.setAge(18);
            person.setName("Tom");
            Intent intent = new Intent(FirstActivity.this,SecondActivity.class);
            intent.putExtra("person_data",person);
            startActivity(intent);
        }
    }

**SecondActivity.java**

package com.sdutacm.getcontextskillpractise;
    
    import android.os.Bundle;
    import android.support.annotation.Nullable;
    import android.support.v7.app.AppCompatActivity;
    import android.util.Log;
    
    /**
     * Created by bummer on 2017/8/9.
     */
    
    public class SecondActivity extends AppCompatActivity{
        
       public static String TAG = "SecondActivity";
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            Person person = (Person) getIntent().getParcelableExtra("person_data");
            Log.d(TAG,"person name is "+person.getName());
            Log.d(TAG,"person age is "+person.getAge());
    
        }
    }

**Person.java**

package com.sdutacm.getcontextskillpractise;
    
    import android.os.Parcel;
    import android.os.Parcelable;
    
    /**
     * Created by bummer on 2017/8/9.
     */
    
    public class Person implements Parcelable {
        
       private String name;
        private int age;
    
        public static Creator<Person> getCREATOR() {
            return CREATOR;
        }
    
        protected Person(Parcel in) {
            name = in.readString();
            age = in.readInt();
        }
    
        public static final Parcelable.Creator<Person> CREATOR = new Creator<Person>() {
            @Override
            public Person createFromParcel(Parcel in) {
                Person person = new Person();
                person.name = in.readString(); //读取name
                person.age = in.readInt(); //读取年龄
                return person;
            }
    
            @Override
            public Person[] newArray(int size) {
                return new Person[size];
            }
        };
    
        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 Person() {
        }
    
        @Override
        public int describeContents() {
            return 0;
        }
    
        @Override
        public void writeToParcel(Parcel dest, int flags) {
            dest.writeString(name);  //写出name
            dest.writeInt(age);   //写出age
        }
    }