[안드로이드] 6. Activity and Intent

Explicit Intent는인텐트를 충족하는 애플리케이션이 무엇인지 지정합니다. 이를 위해 대상 앱의 패키지 이름 또는 완전히 자격을 갖춘 구성 요소 클래스 이름을 제공.

 

ex) Page1에서 Page2로 넘어갈 때, 사용되는 노드 같은 것

 

 

0. AndroidManifest.xml ( SecondActivty를 manifest에 추가 )

        <activity android:name=".SecondActivity">

        </activity>

 

 

1. first_layout.xml

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

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button"
        android:onClick="ClickButton"
        android:id="@+id/btn">

    </Button>

</LinearLayout>

2. MainActivity.java (Activity A)

package com.example.project8_intent;

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 {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.first_layout);
		
        // Button Event
        Button btn = (Button)findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View view)
            {
                // intent ( Start Point : Main -> End Point : SecondActivity )
                Intent intent = new Intent(getApplicationContext(), SecondActivity.class);
                startActivity(intent);
            }
        });
    }
}

 Button Click했을 때( Start Point : MainActivity ---> End Point : SecondActivity )

 

 

 

3. second_layout.xml

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

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Second Button"
        android:id="@+id/btn2"
        >

    </Button>

</LinearLayout>

4. SecondActivity.java

package com.example.project8_intent;

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

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

public class SecondActivity extends AppCompatActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.second_layout);

        Button btn = (Button)findViewById(R.id.btn2);
		
        // SecondActivity 종료
        btn.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View view){
                finish();

            }
        });
    }
}

 Button Click했을 때( SecondActivity 종료)

 

 

MainActvity.java

SecondActivty

 

developer.android.com/guide/components/intents-filters?hl=ko#java

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