Event (이벤트) - 터치와 제스처 이벤트

1.Touch Event & Gesture Event 결과 화면

   

2. MainActivity.java

MotionEvent 객체에는 터치된 곳의 좌표와 함께 터치된 상태가 전달된다.

손가락이 눌렸는지, 눌린 상태에서 움직였는지, 아니면 손가락이 떼어졌는지를 구분할 수 있는 정보를 받을 수 있는데 getAction 메소드를 이용해 확인할 수 있다.

package com.tistory.qlyh8.pracitice;
 
import android.support.v7.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;
    View view1, view2;
    GestureDetector detector;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        textView = findViewById(R.id.textview);
        view1 = findViewById(R.id.view1);
        view2 = findViewById(R.id.view2);
 
        view1.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                int action = event.getAction();
 
                if (action == MotionEvent.ACTION_DOWN) {
                    println("손가락 눌림.");
                } else if (action == MotionEvent.ACTION_MOVE) {
                    println("손가락 움직임.");
                } else if (action == MotionEvent.ACTION_UP) {
                    println("손가락 뗌.");
                }
                return true;
            }
        });
 
        view2.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                detector.onTouchEvent(event);
                return true;
            }
        });
 
        detector = new GestureDetector(this, new GestureDetector.OnGestureListener() {
            @Override
            public boolean onDown(MotionEvent e) {
                println("onDown() 호출됨.");
                return true;
            }
 
            @Override
            public void onShowPress(MotionEvent e) {
                println("onShowPress() 호출됨.");
            }
 
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                println("onSingleTapUp() 호출됨.");
                return true;
            }
 
            @Override
            public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
                println("onScroll() 호출됨." + distanceX + ", " + distanceY);
                return true;
            }
 
            @Override
            public void onLongPress(MotionEvent e) {
                println("onLongPress() 호출됨.");
            }
 
            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                println("onFling() 호출됨." + velocityX + ", " + velocityY);
                return true;
            }
        });
    }
 
    public void println(String data){
        textView.append(data + "\n");
    }
}
 

4. activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.tistory.qlyh8.pracitice.MainActivity"
    android:orientation="vertical">
 
    <View
        android:id="@+id/view1"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#e76a6a"/>
 
    <View
        android:id="@+id/view2"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#ade76a"/>
 
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
 
        <TextView
            android:id="@+id/textview"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </ScrollView>
</LinearLayout>
 

출처: https://www.edwith.org/boostcourse-android/lecture/17051/