[Do it 안드로이드] Parcelable 예제

Parcelable 예제

* Day15-4 강의 내용인데 이해 못함..... ㅠ.ㅠ

<Main>

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i = new Intent(getApplicationContext(), MenuActivity.class);

                ArrayList<String> names = new ArrayList<String>();
                names.add("김진수");
                names.add("황수경");

                i.putExtra("names", names);

                startActivityForResult(i, 101);
            }
        });
    } }

<Menu>

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;

import java.util.ArrayList;

public class MenuActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_menu);

        findViewById(R.id.button2).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                finish();
            }
        });

        Intent passedIntent = getIntent();
        processIntent(passedIntent);

    }

    private void processIntent(Intent passedIntent) {
        if (passedIntent != null) {
            ArrayList<String> names = (ArrayList<String>) passedIntent.getSerializableExtra("names");
            if (names != null) {
                Toast.makeText(getApplicationContext(), "넘겨받은 이름 갯수 : " 
                                          + names.size(), Toast.LENGTH_SHORT).show();
            }
        }
    }

}

<SimpleData.Class>

package com.oneplus.gubong_kim.parcelable;

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

public class SimpleData implements Parcelable {

    int num;
    String msg;

    public SimpleData(int num, String msg) {
        this.num = num;
        this.msg = msg;
    }

    public SimpleData(Parcel src) {
        num = src.readInt();
        msg = src.readString();
    }

    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
        public SimpleData createFromParcle(Parcel src) {
            return new SimpleData(src);
        }

        @Override
        public Object createFromParcel(Parcel parcel) {
            return null;
        }

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

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

    @Override
    public void writeToParcel(Parcel parcel, int i) {
        parcel.writeInt(num);
        parcel.writeString(msg);

    }
}