화면전환

WriteActivity.java

package com.example.diary;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class WriteActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_write);
        //4.1. 여기서 Intent를 받아보자.
        Intent intent = getIntent();
        String title = intent.getExtras().getString("title");
        Toast.makeText(getApplicationContext(),title, Toast.LENGTH_SHORT).show();

        //5.작성완료 버튼에 대한 이벤트를 걸어보자.
        Button btn2 = findViewById(R.id.btnSave);
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent mainIntent = new Intent(getApplicationContext(), MainActivity.class);
                mainIntent.putExtra("msg","returnTest");
                setResult(RESULT_OK, mainIntent);
                finish();
            }
        });
    }//end of onCreate
}//end of class