[안드로이드 프로그래밍] Day11

이벤트처리

리스너 사용

MyEvent의 MainActivity.java

package com.example.tristan91.myevent;

import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    TextView textview;
    GestureDetector detector;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textview = (TextView) findViewById(R.id.textView);


        Button button = (Button) findViewById(R.id.button); // setContentView로 인플래이션을 했기에 id를 가져올 수 있다.

        /*
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                textview.setText("버튼이 클릭되었습니다");
            }
        });
        */
        button.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                if (event.getAction() == MotionEvent.ACTION_DOWN) {
                    textview.setText("손가락이 눌렸음");
                } else if (event.getAction() == MotionEvent.ACTION_UP) {
                    textview.setText("손가락이 떼짐");
                }
                return true; // 정상적인 실행을 하였다.
            }
        });
        detector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
                textview.setText("onScroll() 호출됨: " + distanceX + "," + distanceY);
                return super.onScroll(e1, e2, distanceX, distanceY);
            }

            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                textview.setText("onFling() 호출됨: " + velocityX + "," + velocityY);
                return super.onFling(e1, e2, velocityX, velocityY);
            }
        });
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (detector != null) {
            return detector.onTouchEvent(event);
        } else {
            return super.onTouchEvent(event);
        }
    }

    @Override
    public void onBackPressed() {
        Toast.makeText(getApplicationContext(), "onBackPressed() 호출됨", Toast.LENGTH_LONG).show();
        return;
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        if  (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE){
            Toast.makeText(getApplicationContext(), "가로방향으로 됨", Toast.LENGTH_LONG).show();
        }else if  (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
            Toast.makeText(getApplicationContext(), "가로방향으로 됨", Toast.LENGTH_LONG).show();
        }
        super.onConfigurationChanged(newConfig);
    }// 매니페이스트에서 설정했던 상태가 바뀌게 되면 이 쪽으로 정보가 날라옴
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.tristan91.myevent">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:configChanges="orientation|screenSize|keyboardHidden"// 기기의 변경정보, 자바소스에 값을 넘겨줌
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

패드만들기

MyEvent의 activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.tristan91.myevent.MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="시작"
        android:id="@+id/button"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="결과"
        android:id="@+id/textView"
        android:layout_above="@+id/button"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="43dp"
        android:textSize="30dp" />

    <com.example.tristan91.myevent.MyView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/button"
        android:background="#ffeeccff"/>
</RelativeLayout>

<!--
자바소스를 추가하는 방법
1. xml에서 태그로 선언 (패키지명까지 써줘야함)
2. 자바소스에서 객체 생성후 addView로 추가가능
-->

MyEvent의 MyView.java

package com.example.tristan91.myevent;

import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;

public class MyView extends View {

    public MyView(Context context) {
        super(context);
    }

    public MyView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    //리스너는 위젯밖에서 선언해서 동작, 위젯안에서 사용하는 건


    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            Log.d("MyView", "손가락이 눌렸음");
        } else if (event.getAction() == MotionEvent.ACTION_UP) {
            Log.d("MyView", "손가락이 떼짐");
        } else if (event.getAction() == MotionEvent.ACTION_MOVE) {
            Log.d("MyView", "손가락이 움직인다");
        }
        return true;
    }
}