[챕터 2-2-5] 이벤트

결과화면

 

하늘색 영역 

손가락 뗌, 손가락 눌림, 손가락 움직임 상태 이벤트 감지

 

연노란색 영역

onDown 상태 이벤트 감지

onFling 상태 이벤트 감지

 

하단의 흰색 영역

표시

 

하단의 백버튼(<) 클릭 시

이전 화면으로 돌아가지 않고

시스템[BACK] 버튼이 눌렸어요. 메세지

 

 

 

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균등 3분할

 

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MainActivity

 

package org.minokuma.myevent;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    TextView textView;
    GestureDetector detector;

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

        textView = findViewById(R.id.textView);
        View view = findViewById(R.id.view);
        view.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {

                int action = motionEvent.getAction();

                float curX = motionEvent.getX();
                float curY = motionEvent.getY();

                if(action == MotionEvent.ACTION_DOWN){
                    println("손가락 눌림 : " + curX + ", " + curY);
                }else if(action == MotionEvent.ACTION_MOVE){
                    println("손가락 움직임 : " + curX + ", " + curY);
                }else if(action == MotionEvent.ACTION_UP){
                    println("손가락 뗌 : " + curX + ", " + curY);
                }

                return true;
            }
        });

        detector = new GestureDetector(this, new GestureDetector.OnGestureListener() {
            @Override
            public boolean onDown(MotionEvent motionEvent) {
                println("onDown 호출됨");
                return true;
            }

            @Override
            public void onShowPress(MotionEvent motionEvent) {

            }

            @Override
            public boolean onSingleTapUp(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
                return false;
            }

            @Override
            public void onLongPress(MotionEvent motionEvent) {
                println("onLongPress 호출됨");
            }

            @Override
            public boolean onFling(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
                println("onFling 호출됨 : " + v + ", " + v1);
                return true;
            }
        });

        View view2 = findViewById(R.id.view2);
        view2.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                detector.onTouchEvent(motionEvent);
                return true;
            }
        });

    }

    public void println(String data){
        textView.append(data + "\n");
    }
}

 

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오버라이드 메소드를 이용해 재정의

 

onKeyDown 선택

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package org.minokuma.myevent;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.GestureDetector;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    TextView textView;
    GestureDetector detector;

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

        textView = findViewById(R.id.textView);
        View view = findViewById(R.id.view);
        view.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {

                int action = motionEvent.getAction();

                float curX = motionEvent.getX();
                float curY = motionEvent.getY();

                if(action == MotionEvent.ACTION_DOWN){
                    println("손가락 눌림 : " + curX + ", " + curY);
                }else if(action == MotionEvent.ACTION_MOVE){
                    println("손가락 움직임 : " + curX + ", " + curY);
                }else if(action == MotionEvent.ACTION_UP){
                    println("손가락 뗌 : " + curX + ", " + curY);
                }

                return true;
            }
        });

        detector = new GestureDetector(this, new GestureDetector.OnGestureListener() {
            @Override
            public boolean onDown(MotionEvent motionEvent) {
                println("onDown 호출됨");
                return true;
            }

            @Override
            public void onShowPress(MotionEvent motionEvent) {

            }

            @Override
            public boolean onSingleTapUp(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
                return false;
            }

            @Override
            public void onLongPress(MotionEvent motionEvent) {
                println("onLongPress 호출됨");
            }

            @Override
            public boolean onFling(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
                println("onFling 호출됨 : " + v + ", " + v1);
                return true;
            }
        });

        View view2 = findViewById(R.id.view2);
        view2.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                detector.onTouchEvent(motionEvent);
                return true;
            }
        });

    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK){
            println("시스템 [BACK] 버튼이 눌렸어요.");
            return true;
        }
        return false;
    }

    public void println(String data){
        textView.append(data + "\n");
    }
}