Android Parcelable example

안드로이드에서 Parcelable 인터페이스를 이용하여 Student객체를 다른 액티비티에 전달하는 예

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.androidapp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".Activity02"
            android:label="두번째 액티비티" >
        </activity>
    </application>

</manifest>

res/layout/main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rootLayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="onBtnSend"
        android:text="두번째 액티비티에 객체를 전송하자" />

</LinearLayout>

res/layout/second.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="첫번째 액티비티에서 전달된 값은 다음과 같습니다" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dip"
        android:text="번 호: " />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dip"
        android:text="이 름: " />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dip"
        android:text="전 화: " />

</LinearLayout>

MainActivity.java (Student형 객체를 다른 액티비티로 전달하는 메인 액티비티 )

package com.example.androidapp;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.TextView;

public class MainActivity extends Activity {
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
   }
    
    public void onBtnSend(View v) {
    	Intent intent = new Intent(this, Activity02.class);
    	Student st = new Student(10, "장미란", "010-346-7543");
    	intent.putExtra("student", st);
    	startActivity(intent);
    }
}

Student.java ( 인텐트로 전달될 Object형이므로 Parcel 형으로 전달되어야 하므로 Parcelable 인터페이스를 구현한다 )

package com.example.androidapp;

import android.os.Parcel;
import android.os.Parcelable;

public class Student implements Parcelable {
	
	private int id;
	private String name;
	private String phone;
	
	public Student() {}

	public Student(int id, String name, String phone) {
		this.id = id;
		this.name = name;
		this.phone = phone;
	}
	
	public Student(Parcel parcel) {
		this.id = parcel.readInt();
		this.name = parcel.readString();
		this.phone = parcel.readString();
	}
	
	public static final Parcelable.Creator<Student> CREATOR  = 
			new Parcelable.Creator<Student>() {
				public Student createFromParcel(Parcel source) {
					return new Student(source);
				}

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

	public int describeContents() {
		return 0;
	}

	public void writeToParcel(Parcel dest, int flags) {
		dest.writeInt(id);
		dest.writeString(name);
		dest.writeString(phone);
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getPhone() {
		return phone;
	}

	public void setPhone(String phone) {
		this.phone = phone;
	}

}

Activity02.java (첫번째 액티비티로부터 Parcel 객체를 받아서 원래의 Student 형으로 변환하는 액티비티)

package com.example.androidapp;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Parcelable;
import android.widget.TextView;

public class Activity02 extends Activity {

	TextView tv1, tv2, tv3;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.second);
		tv1 = (TextView) findViewById(R.id.textView1);
		tv2 = (TextView) findViewById(R.id.textView2);
		tv3 = (TextView) findViewById(R.id.textView3);
		
		Intent intent = getIntent();
		Parcelable parcel = intent.getExtras().getParcelable("student");
		Student st = (Student) parcel;
		
		tv1.append(st.getId()+"");
		tv2.append(st.getName());
		tv3.append(st.getPhone());
	}
}