[안드로이드 2일차] Intent 다루어 보기

결과물!

<코드>

package com.cjwplatform.myapp;

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

public class MainActivity extends AppCompatActivity {
    public final static String EXTRA_MESSAGE = "com.cjwplatform.myapp.MESSAGE";

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

    // 클릭을 했을때 원하는 동작
    public void sendMessage(View view){
        Intent intent = new Intent(this,DisplayMessageActivity.class);
        EditText editText = findViewById(R.id.edit_message);
        String message = editText.getText().toString();
        intent.putExtra(EXTRA_MESSAGE,message);
        startActivity(intent);
    }
}

package com.cjwplatform.myapp;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.ViewGroup;
import android.widget.TextView;

public class DisplayMessageActivity extends AppCompatActivity {


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

        Intent intent = getIntent();
        String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);

        TextView textView = new TextView(this);
        textView.setTextSize(40);
        textView.setText(message);
        // 코드로 layout 작성해보기
        ViewGroup layout = findViewById(R.id.activity_display_message);
        layout.addView(textView);

    }
}

DisplayActivity를 보면 layout을 activity에서 직접 수정하거나 다룰 수 있다.