터치 제스처 키 이벤트 처리하기 연습

package com.example.sampleevent;

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.ImageView;
import android.widget.TextView;

import org.w3c.dom.Text;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnTouch;

public class MainActivity extends AppCompatActivity {
    @BindView(R.id.view)
    View view;
    @BindView(R.id.view2)
    View view2;
    @BindView(R.id.textView)
    TextView textView;
    GestureDetector detector;

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


        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 e) {
                println("onDonw() 호출됨.");
                return true;
            }

            @Override
            public void onShowPress(MotionEvent e) {
                println("onShowPress() 호출됨.");
            }

            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                println("onSingleTapUp() 호출됨.");
                return false;
            }

            @Override
            public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
                println("onScroll 호출됨 : " +distanceX +", "+distanceY );
                return false;
            }

            @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;
            }
        });
        view2.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                detector.onTouchEvent(event);
                return true;
            }
        });

    }
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if(keyCode==KeyEvent.KEYCODE_BACK){
        Toast.makeText(this,"뒤로가기",Toast.LENGTH_LONG).show();
        return true;
    }

    return false;

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

activity

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    tools:context=".MainActivity">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <View
        android:id="@+id/view"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@android:color/holo_blue_bright"></View>

    <View
        android:id="@+id/view2"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@android:color/holo_orange_light"></View>
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        >
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <TextView
                android:id="@+id/textView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />
        </LinearLayout>
    </ScrollView>

</LinearLayout>


</android.support.constraint.ConstraintLayout>

xml

제스쳐 이벤트중

스크롤:손가락으로 드래그 하는 경우, 이동한 거리 값이 중요

플링: 빠른 속도로 스크롤을 하는 경우, 이동한 속도 값이 중요