Androidで左または右のスワイプを検出する方法は？
AndroidにはEditTextビューがあります。これで私は左または右にスワイプを検出したい。以下のコードを使用して、空きスペースで取得できます。しかし、EditTextをスワイプすると、これは機能しません。それ、どうやったら出来るの？間違ったことをしている場合はお知らせください。ありがとうございました。
使用コード：
switch (touchevent.getAction())
{
case MotionEvent.ACTION_DOWN:
{
oldTouchValue = touchevent.getX();
break;
}
case MotionEvent.ACTION_UP:
{
float currentX = touchevent.getX();
if (oldTouchValue < currentX)
{
// swiped left
}
if (oldTouchValue > currentX )
{
swiped right
}
break;
}
}
最も簡単な左から右へのスワイプ検出器：
アクティビティクラスに次の属性を追加します。
private float x1,x2;
static final int MIN_DISTANCE = 150;
onTouchEvent()メソッドをオーバーライドします。
@Override
public boolean onTouchEvent(MotionEvent event)
{
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
x1 = event.getX();
break;
case MotionEvent.ACTION_UP:
x2 = event.getX();
float deltaX = x2 - x1;
if (Math.abs(deltaX) > MIN_DISTANCE)
{
Toast.makeText(this, "left2right swipe", Toast.LENGTH_SHORT).show ();
}
else
{
// consider as something else - a screen tap for example
}
break;
}
return super.onTouchEvent(event);
}
@ user2999943のコードが好きです。しかし、私自身の目的のためのいくつかの小さな変更。
@Override
public boolean onTouchEvent(MotionEvent event)
{
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
x1 = event.getX();
break;
case MotionEvent.ACTION_UP:
x2 = event.getX();
float deltaX = x2 - x1;
if (Math.abs(deltaX) > MIN_DISTANCE)
{
// Left to Right swipe action
if (x2 > x1)
{
Toast.makeText(this, "Left to Right swipe [Next]", Toast.LENGTH_SHORT).show ();
}
// Right to left swipe action
else
{
Toast.makeText(this, "Right to Left swipe [Previous]", Toast.LENGTH_SHORT).show ();
}
}
else
{
// consider as something else - a screen tap for example
}
break;
}
return super.onTouchEvent(event);
}
これは私が使用するかわいいクラスです（Viewでイベントをキャッチしたい場合、ViewGroupであれば、2番目の実装を使用します）。
import Android.util.Log;
import Android.view.MotionEvent;
import Android.view.View;
public class SwipeDetector implements View.OnTouchListener{
private int min_distance = 100;
private float downX, downY, upX, upY;
private View v;
private onSwipeEvent swipeEventListener;
public SwipeDetector(View v){
this.v=v;
v.setOnTouchListener(this);
}
public void setOnSwipeListener(onSwipeEvent listener)
{
try{
swipeEventListener=listener;
}
catch(ClassCastException e)
{
Log.e("ClassCastException","please pass SwipeDetector.onSwipeEvent Interface instance",e);
}
}
public void onRightToLeftSwipe(){
if(swipeEventListener!=null)
swipeEventListener.SwipeEventDetected(v,SwipeTypeEnum.RIGHT_TO_LEFT);
else
Log.e("SwipeDetector error","please pass SwipeDetector.onSwipeEvent Interface instance");
}
public void onLeftToRightSwipe(){
if(swipeEventListener!=null)
swipeEventListener.SwipeEventDetected(v,SwipeTypeEnum.LEFT_TO_RIGHT);
else
Log.e("SwipeDetector error","please pass SwipeDetector.onSwipeEvent Interface instance");
}
public void onTopToBottomSwipe(){
if(swipeEventListener!=null)
swipeEventListener.SwipeEventDetected(v,SwipeTypeEnum.TOP_TO_BOTTOM);
else
Log.e("SwipeDetector error","please pass SwipeDetector.onSwipeEvent Interface instance");
}
public void onBottomToTopSwipe(){
if(swipeEventListener!=null)
swipeEventListener.SwipeEventDetected(v,SwipeTypeEnum.BOTTOM_TO_TOP);
else
Log.e("SwipeDetector error","please pass SwipeDetector.onSwipeEvent Interface instance");
}
public boolean onTouch(View v, MotionEvent event) {
switch(event.getAction()){
case MotionEvent.ACTION_DOWN: {
downX = event.getX();
downY = event.getY();
return true;
}
case MotionEvent.ACTION_UP: {
upX = event.getX();
upY = event.getY();
float deltaX = downX - upX;
float deltaY = downY - upY;
//HORIZONTAL SCROLL
if(Math.abs(deltaX) > Math.abs(deltaY))
{
if(Math.abs(deltaX) > min_distance){
// left or right
if(deltaX < 0)
{
this.onLeftToRightSwipe();
return true;
}
if(deltaX > 0) {
this.onRightToLeftSwipe();
return true;
}
}
else {
//not long enough swipe...
return false;
}
}
//VERTICAL SCROLL
else
{
if(Math.abs(deltaY) > min_distance){
// top or down
if(deltaY < 0)
{ this.onTopToBottomSwipe();
return true;
}
if(deltaY > 0)
{ this.onBottomToTopSwipe();
return true;
}
}
else {
//not long enough swipe...
return false;
}
}
return true;
}
}
return false;
}
public interface onSwipeEvent
{
public void SwipeEventDetected(View v, SwipeTypeEnum SwipeType);
}
public SwipeDetector setMinDistanceInPixels(int min_distance)
{
this.min_distance=min_distance;
return this;
}
public enum SwipeTypeEnum
{
RIGHT_TO_LEFT,LEFT_TO_RIGHT,TOP_TO_BOTTOM,BOTTOM_TO_TOP
}
}
これは使用例です：
filters_container=(RelativeLayout)root.findViewById(R.id.filters_container);
new SwipeDetector(filters_container).setOnSwipeListener(new SwipeDetector.onSwipeEvent() {
@Override
public void SwipeEventDetected(View v, SwipeDetector.SwipeTypeEnum swipeType) {
if(swipeType==SwipeDetector.SwipeTypeEnum.LEFT_TO_RIGHT)
getActivity().onBackPressed();
}
});
場合によっては、コンテナでスワイプジェスチャを検出し、タッチイベントを子に渡すことができます。その場合、カスタムビューグループを作成し、RelativeLayoutでonInterceptTouchEventをオーバーライドすると、スワイプイベントを検出できますタッチビューの子ビューへのパスをブロックせずに、たとえば：
import Android.content.Context;
import Android.util.AttributeSet;
import Android.view.MotionEvent;
import Android.widget.RelativeLayout;
public class SwipeDetectRelativeLayout extends RelativeLayout {
private float x1,x2;
static final int MIN_DISTANCE=150;
private onSwipeEventDetected mSwipeDetectedListener;
public SwipeDetectRelativeLayout(Context context) {
super(context);
}
public SwipeDetectRelativeLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SwipeDetectRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
switch(ev.getAction())
{
case MotionEvent.ACTION_DOWN:
x1 = ev.getX();
break;
case MotionEvent.ACTION_UP:
x2 = ev.getX();
float deltaX = x2 - x1;
if (Math.abs(deltaX) > MIN_DISTANCE)
{
//swiping right to left
if(deltaX<0)
{
if(mSwipeDetectedListener!=null)
mSwipeDetectedListener.swipeEventDetected();
}
}
break;
}
return super.onInterceptTouchEvent(ev);
}
public interface onSwipeEventDetected
{
public void swipeEventDetected();
}
public void registerToSwipeEvents(onSwipeEventDetected listener)
{
this.mSwipeDetectedListener=listener;
}
}
スワイプイベントは、onTouchイベントの一種です。 @Gal Romの答えを単純化するだけで、垂直方向と水平方向のデルタを追跡するだけで、ちょっとした計算でtouchEventがどのようなスワイプであったかを判断できます。 （繰り返しますが、これは以前の回答に基づいているが、単純さは初心者には魅力的かもしれません）。 OnTouchListenerを拡張し、発生したスワイプ（タッチ）の種類を検出し、種類ごとに特定のメソッドを呼び出すという考え方です。
public class SwipeListener implements View.OnTouchListener {
private int min_distance = 100;
private float downX, downY, upX, upY;
View v;
@Override
public boolean onTouch(View v, MotionEvent event) {
this.v = v;
switch(event.getAction()) { // Check vertical and horizontal touches
case MotionEvent.ACTION_DOWN: {
downX = event.getX();
downY = event.getY();
return true;
}
case MotionEvent.ACTION_UP: {
upX = event.getX();
upY = event.getY();
float deltaX = downX - upX;
float deltaY = downY - upY;
//HORIZONTAL SCROLL
if (Math.abs(deltaX) > Math.abs(deltaY)) {
if (Math.abs(deltaX) > min_distance) {
// left or right
if (deltaX < 0) {
this.onLeftToRightSwipe();
return true;
}
if (deltaX > 0) {
this.onRightToLeftSwipe();
return true;
}
} else {
//not long enough swipe...
return false;
}
}
//VERTICAL SCROLL
else {
if (Math.abs(deltaY) > min_distance) {
// top or down
if (deltaY < 0) {
this.onTopToBottomSwipe();
return true;
}
if (deltaY > 0) {
this.onBottomToTopSwipe();
return true;
}
} else {
//not long enough swipe...
return false;
}
}
return false;
}
}
return false;
}
public void onLeftToRightSwipe(){
Toast.makeText(v.getContext(),"left to right",
Toast.LENGTH_SHORT).show();
}
public void onRightToLeftSwipe() {
Toast.makeText(v.getContext(),"right to left",
Toast.LENGTH_SHORT).show();
}
public void onTopToBottomSwipe() {
Toast.makeText(v.getContext(),"top to bottom",
Toast.LENGTH_SHORT).show();
}
public void onBottomToTopSwipe() {
Toast.makeText(v.getContext(),"bottom to top",
Toast.LENGTH_SHORT).show();
}
}
部分的には機能しますが、時間変数が欠落している受け入れられた答えに追加したいので、完璧になります。
時間変数を持つ最も単純な左から右へのスワイプ検出器：
アクティビティクラスに次の属性を追加します。
private float x1,x2;
private long startClickTime;
static final int MIN_DISTANCE = 150;
static final int MAX_SWIPE_TIME = 200;
onTouchEvent（）メソッドをオーバーライドします：
@Override
public boolean onTouchEvent(MotionEvent event)
{
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
startClickTime = Calendar.getInstance().getTimeInMillis();
x1 = event.getX();
break;
case MotionEvent.ACTION_UP:
long clickDuration = Calendar.getInstance().getTimeInMillis() - startClickTime;
x2 = event.getX();
float deltaX = x2 - x1;
if (Math.abs(deltaX) > MIN_DISTANCE && clickDuration < MAX_SWIPE_TIME)
{
Toast.makeText(this, "left2right swipe", Toast.LENGTH_SHORT).show ();
}
else
{
// consider as something else - a screen tap for example
}
break;
}
return super.onTouchEvent(event);
}
左から右および右から左へのスワイプ検出器
まず、floatデータ型の2つの変数を宣言します。
private float x1, x2;
次に、Javaでxmlビューを接続します。私がImageViewを持っているように
ImageView img = (ImageView) findViewById(R.id.imageView);
第三に、setOnTouchListenerにImageViewがあります。
img.setOnTouchListener(
new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
x1 = event.getX();
break;
case MotionEvent.ACTION_UP:
x2 = event.getX();
float deltaX = x2 - x1;
if (deltaX < 0) {
Toast.makeText(MainActivity.this,
"Right to Left swipe",
Toast.LENGTH_SHORT).show();
}else if(deltaX >0){
Toast.makeText(MainActivity.this,
"Left to Right swipe",
Toast.LENGTH_SHORT).show();
}
break;
}
return false;
}
});
4方向のスワイプを検出
private float x1,x2,y1,y2;
static final int MIN_DISTANCE = 70;
そして
switch(pSceneTouchEvent.getAction())
{
case MotionEvent.ACTION_DOWN:
x1 = pSceneTouchEvent.getX();
y1 = pSceneTouchEvent.getY();
break;
case MotionEvent.ACTION_UP:
x2 = pSceneTouchEvent.getX();
y2 = pSceneTouchEvent.getY();
float deltaX = x2 - x1;
float deltaY = y2 - y1;
if (deltaX > MIN_DISTANCE)
{
swipeLeftToRight();
}
else if( Math.abs(deltaX) > MIN_DISTANCE)
{
swipeRightToLeft();
}
else if(deltaY > MIN_DISTANCE){
swipeTopToBottom();
}
else if( Math.abs(deltaY) > MIN_DISTANCE){
swipeBottopmToTop();
}
break;
}
スワイプイベント-TOP、RIGHT、BOTTOM、LEFTを簡単に検出できる単純なクラスを作成しました。
1：シングルスワイプイベントを検出
// Detect and consume specific events
// {Available methods} - detectTop, detectRight, detectBottom, detectLeft
SwipeEvents.detectTop(swipeElement, new SwipeEvents.SwipeSingleCallback() {
@Override
public void onSwipe() {
showToast("Swiped - detectTop");
}
});
2：1回のコールバックでスワイプイベントを検出します。
SwipeEvents.detect( swipeElement, new SwipeEvents.SwipeCallback() {
@Override
public void onSwipeTop() {
//Swiped top
}
@Override
public void onSwipeRight() {
//Swiped right
}
@Override
public void onSwipeBottom() {
//Swiped bottom
}
@Override
public void onSwipeLeft() {
//Swiped left
}
});
使用方法の説明を含むブログ投稿は次のとおりです。 http://bmutinda.com/Android-detect-swipe-events/
ここにあるコードスニペットのGistも作成しました： https://Gist.github.com/bmutinda/9578f70f1df9bd0687b8
ありがとう。
私はあなたが望むものは投げ飛ばしと呼ばれると思います。 MotionEventsを使用して、フリングの方向を決定できます。
public class MainActivity extends Activity implements GestureDetector.OnGestureListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.stellar_layout);
mDetector = new GestureDetectorCompat(this, this);
}
@Override
public boolean onFling(MotionEvent event1, MotionEvent event2,
float velocityX, float velocityY) {
Log.d(tag, "onFling:\n " + event1.toString()+ "\n " + event2.toString());
/* prints the following
MotionEvent { action=ACTION_DOWN, id[0]=0, x[0]=297.0, y[0]=672.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=488341979, downTime=488341979, deviceId=6, source=0x1002 }
MotionEvent { action=ACTION_UP, id[0]=0, x[0]=560.0, y[0]=583.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=488342047, downTime=488341979, deviceId=6, source=0x1002 }
*/
return true;
}
}
http://developer.Android.com/training/gestures/detector.html
この機能に1日取り組んだ後、ようやく正しい答えが得られました。
まず、次のクラスを作成します。
import Android.util.Log;
import Android.view.MotionEvent;
import Android.view.View;
/**
* Created by hoshyar on 1/19/17.
*/
public class SwipeDetector implements View.OnTouchListener {
public static enum Action {
LR, // Left to Right
RL, // Right to Left
TB, // Top to bottom
BT, // Bottom to Top
None // when no action was detected
}
private static final String logTag = "Swipe";
private static final int MIN_DISTANCE = 100;
private float downX, downY, upX, upY;
private Action mSwipeDetected = Action.None;
public boolean swipeDetected() {
return mSwipeDetected != Action.None;
}
public Action getAction() {
return mSwipeDetected;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
downX = event.getX();
downY = event.getY();
mSwipeDetected = Action.None;
return false;
case MotionEvent.ACTION_MOVE:
upX = event.getX();
upY = event.getY();
float deltaX = downX - upX;
float deltaY = downY - upY;
Log.i(logTag,String.valueOf(deltaX));
Log.i(logTag,String.valueOf(deltaX));
if (deltaY>0 && deltaY<10 && deltaX<0 || deltaY==0 && deltaX>-15 && deltaX<0){
Log.i(logTag,"to right");
}if (deltaY>=0 && deltaY<10 && deltaX>0 || deltaY<0 && deltaX>15 && deltaX<40){
Log.i(logTag,"to left");
}
if (Math.abs(deltaX) > MIN_DISTANCE) {
// left or right
if (deltaX < 0) {
mSwipeDetected = Action.LR;
return false;
}
if (deltaX > 0) {
mSwipeDetected = Action.RL;
return false;
}
} else if (Math.abs(deltaY) > MIN_DISTANCE) {
if (deltaY < 0) {
Log.i(logTag,"to bottom");
mSwipeDetected = Action.TB;
return false;
}
if (deltaY > 0) {
Log.i(logTag,"to up");
mSwipeDetected = Action.BT;
return false;
}
}
return true;
}
return false;
}
}
最後に、適用するオブジェクトについて。私の例：
SwipeDetector swipeDetector = new SwipeDetector();
listView.setOnTouchListener(swipeDetector);
幸運を 。
public class TransferMarket extends Activity {
float x1,x2;
float y1, y2;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_transfer_market);
}
// onTouchEvent () method gets called when User performs any touch event on screen
// Method to handle touch event like left to right swap and right to left swap
public boolean onTouchEvent(MotionEvent touchevent)
{
switch (touchevent.getAction())
{
// when user first touches the screen we get x and y coordinate
case MotionEvent.ACTION_DOWN:
{
x1 = touchevent.getX();
y1 = touchevent.getY();
break;
}
case MotionEvent.ACTION_UP:
{
x2 = touchevent.getX();
y2 = touchevent.getY();
//if left to right sweep event on screen
if (x1 < x2)
{
Toast.makeText(this, "Left to Right Swap Performed", Toast.LENGTH_LONG).show();
}
// if right to left sweep event on screen
if (x1 > x2)
{
Toast.makeText(this, "Right to Left Swap Performed", Toast.LENGTH_LONG).show();
}
// if UP to Down sweep event on screen
if (y1 < y2)
{
Toast.makeText(this, "UP to Down Swap Performed", Toast.LENGTH_LONG).show();
}
//if Down to UP sweep event on screen
if (y1 > y2)
{
Toast.makeText(this, "Down to UP Swap Performed", Toast.LENGTH_LONG).show();
}
break;
}
}
return false;
}
短くて簡単なバージョン：
1。最初にこの抽象クラスを作成します
public abstract class HorizontalSwipeListener implements View.OnTouchListener {
private float firstX;
private int minDistance;
HorizontalSwipeListener(int minDistance) {
this.minDistance = minDistance;
}
abstract void onSwipeRight();
abstract void onSwipeLeft();
@Override
public boolean onTouch(View view, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
firstX = event.getX();
return true;
case MotionEvent.ACTION_UP:
float secondX = event.getX();
if (Math.abs(secondX - firstX) > minDistance) {
if (secondX > firstX) {
onSwipeLeft();
} else {
onSwipeRight();
}
}
return true;
}
return view.performClick();
}
}
2。次に、必要なものを実装する具体的なクラスを作成します：
public class SwipeListener extends HorizontalSwipeListener {
public SwipeListener() {
super(200);
}
@Override
void onSwipeRight() {
System.out.println("right");
}
@Override
void onSwipeLeft() {
System.out.println("left");
}
}
スワイプの開始からイベントをキャッチする場合は、MotionEvent.ACTION_MOVEを使用して、比較する最初の値を保存できます
private float upX1;
private float upX2;
private float upY1;
private float upY2;
private boolean isTouchCaptured = false;
static final int min_distance = 100;
viewObject.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_MOVE: {
downX = event.getX();
downY = event.getY();
if (!isTouchCaptured) {
upX1 = event.getX();
upY1 = event.getY();
isTouchCaptured = true;
} else {
upX2 = event.getX();
upY2 = event.getY();
float deltaX = upX1 - upX2;
float deltaY = upY1 - upY2;
//HORIZONTAL SCROLL
if (Math.abs(deltaX) > Math.abs(deltaY)) {
if (Math.abs(deltaX) > min_distance) {
// left or right
if (deltaX < 0) {
return true;
}
if (deltaX > 0) {
return true;
}
} else {
//not long enough swipe...
return false;
}
}
//VERTICAL SCROLL
else {
if (Math.abs(deltaY) > min_distance) {
// top or down
if (deltaY < 0) {
return false;
}
if (deltaY > 0) {
return false;
}
} else {
//not long enough swipe...
return false;
}
}
}
return false;
}
case MotionEvent.ACTION_UP: {
isTouchCaptured = false;
}
}
return false;
}
});
これはおそらくあなたを助けるはずです...
private final GestureDetector.SimpleOnGestureListener onGestureListener = new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onDoubleTap(MotionEvent e) {
Log.i("gestureDebug333", "doubleTapped:" + e);
return super.onDoubleTap(e);
}
@Override
public boolean onDoubleTapEvent(MotionEvent e) {
Log.i("gestureDebug333", "doubleTappedEvent:" + e);
return super.onDoubleTapEvent(e);
}
@Override
public boolean onDown(MotionEvent e) {
Log.i("gestureDebug333", "onDown:" + e);
return super.onDown(e);
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
Log.i("gestureDebug333", "flinged:" + e1 + "---" + e2);
Log.i("gestureDebug333", "fling velocity:" + velocityX + "---" + velocityY);
if (e1.getAction() == MotionEvent.ACTION_DOWN && e1.getX() > (e2.getX() + 300)){
// Toast.makeText(context, "flinged right to left", Toast.LENGTH_SHORT).show();
goForward();
}
if (e1.getAction() == MotionEvent.ACTION_DOWN && e2.getX() > (e1.getX() + 300)){
//Toast.makeText(context, "flinged left to right", Toast.LENGTH_SHORT).show();
goBack();
}
return super.onFling(e1, e2, velocityX, velocityY);
}
@Override
public void onLongPress(MotionEvent e) {
super.onLongPress(e);
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
return super.onScroll(e1, e2, distanceX, distanceY);
}
@Override
public void onShowPress(MotionEvent e) {
super.onShowPress(e);
}
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
return super.onSingleTapConfirmed(e);
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
return super.onSingleTapUp(e);
}
};
最良の答えは@Gal Romです。それについての詳細情報があります：タッチイベントが最初に子ビューに戻ります。 onClickまたはonTouchリスナーを定義すると、parntビュー（フラグメントなど）はタッチリスナーを受け取りません。したがって、この状況でフラグメントのスワイプリスナーを定義する場合は、新しいクラスに実装する必要があります。
package com.neganet.QRelations.fragments;
import Android.content.Context;
import Android.util.AttributeSet;
import Android.view.MotionEvent;
import Android.widget.FrameLayout;
public class SwipeListenerFragment extends FrameLayout {
private float x1,x2;
static final int MIN_DISTANCE=150;
private onSwipeEventDetected mSwipeDetectedListener;
public SwipeListenerFragment(Context context) {
super(context);
}
public SwipeListenerFragment(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SwipeListenerFragment(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
boolean result=false;
switch(ev.getAction())
{
case MotionEvent.ACTION_DOWN:
x1 = ev.getX();
break;
case MotionEvent.ACTION_UP:
x2 = ev.getX();
float deltaX = x2 - x1;
if (Math.abs(deltaX) > MIN_DISTANCE)
{
if(deltaX<0)
{
result=true;
if(mSwipeDetectedListener!=null)
mSwipeDetectedListener.swipeLeftDetected();
}else if(deltaX>0){
result=true;
if(mSwipeDetectedListener!=null)
mSwipeDetectedListener.swipeRightDetected();
}
}
break;
}
return result;
}
public interface onSwipeEventDetected
{
public void swipeLeftDetected();
public void swipeRightDetected();
}
public void registerToSwipeEvents(onSwipeEventDetected listener)
{
this.mSwipeDetectedListener=listener;
}
}
@Gal Romのクラスを変更しました。そのため、右と左の両方のスワイプを検出でき、特に検出後にonInterceptTouchEvent trueを返します。子ビューがイベントを受信することがあり、フラグメントのスワイプと子ビューのonClickの両方が（たとえば）実行され、いくつかの問題が発生する場合があるため、重要です。このクラスを作成したら、フラグメントxmlファイルを変更する必要があります。
<com.neganet.QRelations.fragments.SwipeListenerFragment xmlns:Android="http://schemas.Android.com/apk/res/Android"
xmlns:tools="http://schemas.Android.com/tools" Android:layout_width="match_parent"
Android:id="@+id/main_list_layout"
Android:clickable="true"
Android:focusable="true"
Android:focusableInTouchMode="true"
Android:layout_height="match_parent" tools:context="com.neganet.QRelations.fragments.mainList"
Android:background="@color/main_frag_back">
<!-- TODO: Update blank fragment layout -->
<Android.support.v7.widget.RecyclerView
Android:id="@+id/farazList"
Android:scrollbars="horizontal"
Android:layout_width="match_parent"
Android:layout_height="match_parent"
Android:layout_gravity="left|center_vertical" />
</com.neganet.QRelations.fragments.SwipeListenerFragment>
beginタグが作成したクラスであることがわかります。フラグメントクラスになりました：
View view=inflater.inflate(R.layout.fragment_main_list, container, false);
SwipeListenerFragment tdView=(SwipeListenerFragment) view;
tdView.registerToSwipeEvents(this);
and then Implement SwipeListenerFragment.onSwipeEventDetected in it:
@Override
public void swipeLeftDetected() {
Toast.makeText(getActivity(), "left", Toast.LENGTH_SHORT).show();
}
@Override
public void swipeRightDetected() {
Toast.makeText(getActivity(), "right", Toast.LENGTH_SHORT).show();
}
それは少し複雑ですが、完璧に動作します:)