Bagaimana cara mendeteksi gesekan ke kiri atau ke kanan di Android?

Saya memiliki EditTextpandangan di android. Dalam hal ini saya ingin mendeteksi gesekan ke kiri atau kanan. Saya bisa mendapatkannya di ruang kosong menggunakan kode di bawah ini. Namun ini tidak berfungsi saat saya menggesek file EditText. Bagaimana aku melakukan itu? Tolong beritahu saya jika saya melakukan sesuatu yang salah. Terima kasih.

Kode yang Digunakan:

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;
    }
}

Detektor gesekan kiri ke kanan paling sederhana:

Di kelas aktivitas Anda, tambahkan atribut berikut:

private float x1,x2;
static final int MIN_DISTANCE = 150;

dan onTouchEvent()metode timpa :

@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);        
}

Saya suka kode dari @ user2999943. Tetapi hanya beberapa perubahan kecil untuk tujuan saya sendiri.

@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);       
}

Ini adalah kelas lucu yang saya gunakan (dalam kasus saya ingin menangkap acara di View, jika itu adalah ViewGroup, saya menggunakan implementasi kedua):

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
    }

}

dan ini adalah contoh penggunaan:

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();
        }
    });

Dalam beberapa kasus, Anda ingin mendeteksi gerakan menggesek pada wadah dan meneruskan Peristiwa sentuh kepada anak-anak sehingga Anda dapat membuat grup Tampilan Kustom, katakanlah RelativeLayout dan timpa onInterceptTouchEvent, dan di sana Anda dapat mendeteksi peristiwa gesekan tanpa memblokir izin Peristiwa Sentuh untuk tampilan anak Anda, misalnya:

    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;
    }
}

Peristiwa gesek adalah sejenis onTouchacara. Cukup sederhanakan jawaban @Gal Rom, catat saja delta vertikal dan horizontal, dan dengan sedikit matematika Anda dapat menentukan jenis gesekan touchEvent itu. (Sekali lagi, izinkan saya menekankan bahwa ini SANGAT didasarkan pada jawaban sebelumnya, tetapi kesederhanaan mungkin menarik bagi pemula). Idenya adalah untuk memperluas OnTouchListener, mendeteksi jenis gesekan (sentuhan) yang baru saja terjadi dan memanggil metode tertentu untuk setiap jenis.

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();
    }
}

Saya menulis kelas sederhana yang memudahkan untuk mendeteksi peristiwa swipe - ATAS, KANAN, BAWAH, KIRI.

1: Mendeteksi peristiwa gesekan tunggal

// 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: Mendeteksi salah satu peristiwa gesekan dengan satu panggilan balik.

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
    }
});

Berikut adalah postingan blog dengan penjelasan tentang cara menggunakan: http://bmutinda.com/android-detect-swipe-events/

Saya juga telah membuat Inti untuk cuplikan kode yang tersedia di sini: https://gist.github.com/bmutinda/9578f70f1df9bd0687b8

Terima kasih.

Detektor Gesek Kiri ke Kanan dan Kanan ke Kiri

Pertama, nyatakan dua variabel tipe data float.

private float x1, x2;

Kedua, pasang tampilan xml Anda di java. Seperti yang saya milikiImageView

ImageView img = (ImageView) findViewById(R.id.imageView);

Ketiga, setOnTouchListenerpada Anda ImageView.

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;
                    }
                });

Saya ingin menambahkan pada jawaban yang diterima yang berfungsi sebagian, tetapi tidak memiliki variabel waktu, yang membuatnya sempurna.

Detektor gesekan kiri ke kanan paling sederhana dengan variabel waktu:

Di kelas aktivitas Anda, tambahkan atribut berikut:

private float x1,x2;
private long startClickTime;
static final int MIN_DISTANCE = 150;
static final int MAX_SWIPE_TIME = 200;

dan timpa metode onTouchEvent ():

    @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);
    }

Saya pikir apa yang Anda inginkan disebut selingkuh. MotionEvents dapat digunakan untuk menentukan arah lemparan.

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

Deteksi gesekan dalam empat arah

private float x1,x2,y1,y2;
static final int MIN_DISTANCE = 70;

dan

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;   
     }          

Setelah seharian mengerjakan fitur ini akhirnya bisa mendapatkan jawaban yang tepat.

Pertama, buat kelas berikut:

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;
    }
}

Terakhir pada objek yang ingin Anda terapkan. Contoh saya:

SwipeDetector swipeDetector = new SwipeDetector();
listView.setOnTouchListener(swipeDetector);

Semoga berhasil .

Jika Anda ingin menangkap acara dari awal gesekan, Anda dapat menggunakan MotionEvent.ACTION_MOVE dan menyimpan nilai pertama untuk membandingkan

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;

            }
        });

ini akan membantu Anda mungkin ...

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);
    }
};

Versi singkat dan mudah:

1. Pertama buat kelas abstrak ini

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. Kemudian buat kelas konkret yang menerapkan apa yang Anda butuhkan:

public class SwipeListener extends HorizontalSwipeListener {

    public SwipeListener() {
        super(200);
    }

    @Override
    void onSwipeRight() {
        System.out.println("right");
    }

    @Override
    void onSwipeLeft() {
        System.out.println("left");
    }

}

berikut adalah detektor geser ke kiri generik untuk tampilan apa pun di kotlin menggunakan penyatuan data

@BindingAdapter("onSwipeLeft")
fun View.setOnSwipeLeft(runnable: Runnable) {
    setOnTouchListener(object : View.OnTouchListener {
        var x0 = 0F; var y0 = 0F; var t0 = 0L
        val defaultClickDuration = 200

        override fun onTouch(v: View?, motionEvent: MotionEvent?): Boolean {
            motionEvent?.let { event ->
                when(event.action) {
                    MotionEvent.ACTION_DOWN -> {
                        x0 = event.x; y0 = event.y; t0 = System.currentTimeMillis()
                    }
                    MotionEvent.ACTION_UP -> {
                        val x1 = event.x; val y1 = event.y; val t1 = System.currentTimeMillis()

                        if (x0 == x1 && y0 == y1 && (t1 - t0) < defaultClickDuration) {
                            performClick()
                            return false
                        }
                        if (x0 > x1) { runnable.run() }
                    }
                    else -> {}
                }
            }
            return true
        }
    })
}

dan kemudian menggunakannya dalam tata letak Anda:

app:onSwipeLeft="@{() -> viewModel.swipeLeftHandler()}"

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;
    }

jawaban terbaik adalah @Gal Rom's. ada lebih banyak informasi tentang itu: sentuh acara kembali ke tampilan anak terlebih dahulu. dan jika Anda menentukan onClick atau pendengar onTouch untuk mereka, tampilan parnt (misalnya fragmen) tidak akan menerima pendengar sentuh apa pun. Jadi, jika Anda ingin menentukan pemroses gesek untuk fragmen dalam situasi ini, Anda harus mengimplementasikannya di kelas baru:

    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;
    }
}

Saya mengubah kelas @Gal Rom. Sehingga dapat mendeteksi gesekan kanan dan kiri dan secara khusus mengembalikan onInterceptTouchEvent true setelah mendeteksi. ini penting karena jika kita tidak melakukannya beberapa kali tampilan anak mungkin menerima peristiwa dan kedua Swipe untuk fragmen dan onClick untuk tampilan anak (misalnya) berjalan dan menyebabkan beberapa masalah. setelah membuat kelas ini, Anda harus mengubah file xml fragmen Anda:

    <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>

Anda melihat bahwa tag awal adalah kelas yang kami buat. sekarang di kelas fragmen:

            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();
    }

Agak rumit tetapi berfungsi dengan sempurna :)

Anda harus memperluas kelas dari View.OnTouchListenerdan menangani onTouchmetode dengan menimpanya.

interface SwipeListener {
    fun onSwipeLeft()
    fun onSwipeRight()
}

class SwipeGestureListener internal constructor(
    private val listener: SwipeListener,
    private val minDistance: Int = DEFAULT_SWIPE_MIN_DISTANCE
) : View.OnTouchListener {
    companion object {
        const val DEFAULT_SWIPE_MIN_DISTANCE = 200
    }

    private var anchorX = 0F

    override fun onTouch(view: View, event: MotionEvent): Boolean {
        when (event.action) {
            MotionEvent.ACTION_DOWN -> {
                anchorX = event.x
                return true
            }
            MotionEvent.ACTION_UP -> {
                if (abs(event.x - anchorX) > minDistance) {
                    if (event.x > anchorX) {
                        listener.onSwipeRight()
                    } else {
                        listener.onSwipeLeft()
                    }
                }
                return true
            }
        }
        return view.performClick()
    }
}

Anda dapat dengan mudah menerapkannya seperti ini di Activityatau Fragment.

class MainActivity : AppCompatActivity(), SwipeListener {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        viewGroup.setOnTouchListener(SwipeGestureListener(this))
    }

    override fun onSwipeLeft() {
        Toast.makeText(this, "Swipe Left", Toast.LENGTH_SHORT).show()
    }

    override fun onSwipeRight() {
        Toast.makeText(this, "Swipe Right", Toast.LENGTH_SHORT).show()
    }
}