[android]기본 화면전환

////activity_main.xml 파일

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".MainActivity">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />

<Button
style="android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="내소개"
android:id="@+id/button1"/>

</LinearLayout>

 

// sub1.xml 파일

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="test입니다"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="200dp"
android:src="@drawable/child"/>
<Button
style="android/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="돌아가기"
android:layout_gravity="center"
android:id="@+id/button1"/>


</LinearLayout>

 

// dimen 파일 <-- 책을따라 실습중인데 @dimen 이라는걸 쓰길래 검색 후 적용.(values폴더에다 xml파일추가)

<?xml version="1.0" encoding="utf-8"?>
<resources>
<dimen name="activity_vertical_margin">16dp</dimen>
<dimen name="activity_horizontal_margin">16dp</dimen>
</resources>

 

 

//MainActivity파일

package com.example.intenttext00;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {
Button b1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

b1 = (Button) findViewById(R.id.button1);
b1.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
Intent intent1 = new Intent(getApplicationContext(), ShowMe.class);
startActivity(intent1);
}
});
}
}

 

// ShowMe파일

package com.example.intenttext00;

import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

import androidx.appcompat.app.AppCompatActivity;

public class ShowMe extends AppCompatActivity {

Button b1;
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.sub1);

b1 = (Button) findViewById(R.id.button1);
b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish(); // 현재 실행중인 Activity를 종료하는 함수
}

});
}
}

 

// AndroidManifest.xml파일 <-- 이 파일에서 화면전환이 이루어짐 and

//                                    activity파일을 추가생성 할 경우 activity android:name=".name" 에 파일명 추가작성할것.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.intenttext00">

<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/AppTheme">
<activity android:name=".MainActivity"
android:screenOrientation="landscape">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".ShowMe"
android:screenOrientation="landscape">
</activity>
</application>

</manifest>