'값 전달'에 해당되는 글 1건

화면(액티비티) 전환

AndroidManifest.xml 내에 전환 될 액티비티(SecondActivity) 추가

// <application> 내에 추가
<activity android:name=".SecondActivity" />

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.test">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.Test">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".SecondActivity" />

    </application>

</manifest>

//MainActivity 코드

Intent intent = new Intent(MainActivity.this, SecondActivity.class);
startActivity(intent);

값 전달

intent로 값 전달은 putExtra( key, value ) 형식으로 전달한다.

//MainActivity
Intent intent = new Intent(MainActivity.this, SecondActivity.class);
intent.putExtra("숫자", 12345);
intent.putExtra("문자", "가나다라");
startActivity(intent);

Second_Activity에서는 getIntExtra, getStringExtra, getCharExtra, getBooleanExtra, getByteExtra 등 형식에 맞게

MainActivity에서 지정한 key값인 "숫자" , "문자" 에 맞는 값을 각각 받아올 수 있다.

//Second_Activity
TextView tv = (TextView) findViewById(R.id.tv);

Intent intent = getIntent();
int num = intent.getIntExtra("숫자", 0);
String message = intent.getStringExtra("문자");

tv.setText(num + message);