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在網格佈局上進行手勢檢測 (12)

我想在我的Android應用程序中使用手勢檢測功能。

我擁有的是一個包含9個ImageViewGridLayout 。 來源可以在這裡找到: Romain Guys的網格佈局

我使用的文件來自Romain Guy的Photostream應用程序 ,並且只是稍作改動。

對於簡單的點擊情況,我只需要將每個添加的ImageView View.OnClickListener設置為實現View.OnClickListener的主要activity 。 實施能夠識別fling東西似乎是無限複雜的。 我認為這是因為它可能會跨越views

  • 如果我的活動實現了OnGestureListener我不知道如何將它設置為我添加的GridImage視圖的手勢監聽器。

    public class SelectFilterActivity extends Activity implements
       View.OnClickListener, OnGestureListener { ...
    
  • 如果我的活動實現了OnTouchListener那麼我沒有onFling方法來override (它有兩個事件作為參數,允許我確定是否值得注意)。

    public class SelectFilterActivity extends Activity implements
        View.OnClickListener, OnTouchListener { ...
    
  • 如果我製作了一個自定義View ,就像擴展ImageView GestureImageView一樣,我不知道如何告訴活動已經從視圖中發生了GestureImageView 。 無論如何,我嘗試過這種方法,當我觸摸屏幕時不會調用這些方法。

我真的需要一個具體的例子來說明這種觀點。 什麼時候以及如何附加這個listener ? 我還需要能夠檢測到單擊。

// Gesture detection
mGestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {

    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        int dx = (int) (e2.getX() - e1.getX());
        // don't accept the fling if it's too short
        // as it may conflict with a button push
        if (Math.abs(dx) > MAJOR_MOVE && Math.abs(velocityX) > Math.absvelocityY)) {
            if (velocityX > 0) {
                moveRight();
            } else {
                moveLeft();
            }
            return true;
        } else {
            return false;
        }
    }
});

是否可以在屏幕頂部放置透明視圖來捕捉fl光?

如果我選擇不從XML GestureDetector我的子圖像視圖,我可以將GestureDetector作為構造函數參數傳遞給我創建的ImageView的新子類。

這是我試圖讓fling檢測工作的非常簡單的活動: SelectFilterActivity(從照片流改編)

我一直在看這些來源:

到目前為止,我沒有任何工作,我希望得到一些指示。


Gestures are those subtle motions to trigger interactions between the touch screen and the user. It lasts for the time between the first touch on the screen to the point when the last finger leaves the surface.

Android provides us with a class called GestureDetector using which we can detect common gestures like tapping down and up, swiping vertically and horizontally (fling), long and short press, double taps, etc . and attach listeners to them.

Make our Activity class implement GestureDetector.OnDoubleTapListener (for double tap gesture detection) and GestureDetector.OnGestureListener interfaces and implement all the abstract methods.For more info. you may visit https://developer.android.com/training/gestures/detector.html . Courtesy

For Demo Test. GestureDetectorDemo


I know its too late to answer but Still I am posting Swipe Detection for ListView that How to use Swipe Touch Listener in ListView Item .

Refrence: Exterminator13(one of answer in this page)

Make one ActivitySwipeDetector.class

package com.example.wocketapp;

import android.content.Context;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;

public class ActivitySwipeDetector implements View.OnTouchListener 
{
    static final String logTag = "SwipeDetector";
    private SwipeInterface activity;
    private float downX, downY;
    private long timeDown;
    private final float MIN_DISTANCE;
    private final int VELOCITY;
    private final float MAX_OFF_PATH;

    public ActivitySwipeDetector(Context context, SwipeInterface activity)
    {
        this.activity = activity;
        final ViewConfiguration vc = ViewConfiguration.get(context);
        DisplayMetrics dm = context.getResources().getDisplayMetrics();
        MIN_DISTANCE = vc.getScaledPagingTouchSlop() * dm.density;
        VELOCITY = vc.getScaledMinimumFlingVelocity();
        MAX_OFF_PATH = MIN_DISTANCE * 2;
    }

    public void onRightToLeftSwipe(View v) 
    {
        Log.i(logTag, "RightToLeftSwipe!");
        activity.onRightToLeft(v);
    }

    public void onLeftToRightSwipe(View v) 
    {
        Log.i(logTag, "LeftToRightSwipe!");
        activity.onLeftToRight(v);
    }

    public boolean onTouch(View v, MotionEvent event) 
    {
        switch (event.getAction()) 
        {
            case MotionEvent.ACTION_DOWN:
            {
                Log.d("onTouch", "ACTION_DOWN");
                timeDown = System.currentTimeMillis();
                downX = event.getX();
                downY = event.getY();
                v.getParent().requestDisallowInterceptTouchEvent(false);
                return true;
            }

        case MotionEvent.ACTION_MOVE:
            {
                float y_up = event.getY();
                float deltaY = y_up - downY;
                float absDeltaYMove = Math.abs(deltaY);

                if (absDeltaYMove > 60) 
                {
                    v.getParent().requestDisallowInterceptTouchEvent(false);
                } 
                else
                {
                    v.getParent().requestDisallowInterceptTouchEvent(true);
                }
            }

            break;

            case MotionEvent.ACTION_UP: 
            {
                Log.d("onTouch", "ACTION_UP");
                long timeUp = System.currentTimeMillis();
                float upX = event.getX();
                float upY = event.getY();

                float deltaX = downX - upX;
                float absDeltaX = Math.abs(deltaX);
                float deltaY = downY - upY;
                float absDeltaY = Math.abs(deltaY);

                long time = timeUp - timeDown;

                if (absDeltaY > MAX_OFF_PATH) 
                {
                    Log.e(logTag, String.format(
                            "absDeltaY=%.2f, MAX_OFF_PATH=%.2f", absDeltaY,
                            MAX_OFF_PATH));
                    return v.performClick();
                }

                final long M_SEC = 1000;
                if (absDeltaX > MIN_DISTANCE && absDeltaX > time * VELOCITY / M_SEC) 
                {
                     v.getParent().requestDisallowInterceptTouchEvent(true);
                    if (deltaX < 0) 
                    {
                        this.onLeftToRightSwipe(v);
                        return true;
                    }
                    if (deltaX > 0) 
                    {
                        this.onRightToLeftSwipe(v);
                        return true;
                    }
                }
                else 
                {
                    Log.i(logTag,
                            String.format(
                                    "absDeltaX=%.2f, MIN_DISTANCE=%.2f, absDeltaX > MIN_DISTANCE=%b",
                                    absDeltaX, MIN_DISTANCE,
                                    (absDeltaX > MIN_DISTANCE)));
                    Log.i(logTag,
                            String.format(
                                    "absDeltaX=%.2f, time=%d, VELOCITY=%d, time*VELOCITY/M_SEC=%d, absDeltaX > time * VELOCITY / M_SEC=%b",
                                    absDeltaX, time, VELOCITY, time * VELOCITY
                                            / M_SEC, (absDeltaX > time * VELOCITY
                                            / M_SEC)));
                }

                 v.getParent().requestDisallowInterceptTouchEvent(false);

            }
        }
        return false;
    }
    public interface SwipeInterface 
    {

        public void onLeftToRight(View v);

        public void onRightToLeft(View v);
    }

}

Call it from your activity class like this:

yourLayout.setOnTouchListener(new ActivitySwipeDetector(this, your_activity.this));

And Don't forget to implement SwipeInterface which will give you two @override methods:

    @Override
    public void onLeftToRight(View v) 
    {
        Log.e("TAG", "L to R");
    }

    @Override
    public void onRightToLeft(View v) 
    {
        Log.e("TAG", "R to L");
    }

If you dont like to create a separate class or make code complex,
You can just create a GestureDetector variable inside OnTouchListener and make your code more easier

namVyuVar can be any name of the View on which you need to set the listner

namVyuVar.setOnTouchListener(new View.OnTouchListener()
{
    @Override
    public boolean onTouch(View view, MotionEvent MsnEvtPsgVal)
    {
        flingActionVar.onTouchEvent(MsnEvtPsgVal);
        return true;
    }

    GestureDetector flingActionVar = new GestureDetector(getApplicationContext(), new GestureDetector.SimpleOnGestureListener()
    {
        private static final int flingActionMinDstVac = 120;
        private static final int flingActionMinSpdVac = 200;

        @Override
        public boolean onFling(MotionEvent fstMsnEvtPsgVal, MotionEvent lstMsnEvtPsgVal, float flingActionXcoSpdPsgVal, float flingActionYcoSpdPsgVal)
        {
            if(fstMsnEvtPsgVal.getX() - lstMsnEvtPsgVal.getX() > flingActionMinDstVac && Math.abs(flingActionXcoSpdPsgVal) > flingActionMinSpdVac)
            {
                // TskTdo :=> On Right to Left fling

                return false;
            }
            else if (lstMsnEvtPsgVal.getX() - fstMsnEvtPsgVal.getX() > flingActionMinDstVac && Math.abs(flingActionXcoSpdPsgVal) > flingActionMinSpdVac)
            {
                // TskTdo :=> On Left to Right fling

                return false;
            }

            if(fstMsnEvtPsgVal.getY() - lstMsnEvtPsgVal.getY() > flingActionMinDstVac && Math.abs(flingActionYcoSpdPsgVal) > flingActionMinSpdVac)
            {
                // TskTdo :=> On Bottom to Top fling

                return false;
            }
            else if (lstMsnEvtPsgVal.getY() - fstMsnEvtPsgVal.getY() > flingActionMinDstVac && Math.abs(flingActionYcoSpdPsgVal) > flingActionMinSpdVac)
            {
                // TskTdo :=> On Top to Bottom fling

                return false;
            }
            return false;
        }
    });
});

To all: don't forget about case MotionEvent.ACTION_CANCEL:

it calls in 30% swipes without ACTION_UP

and its equal to ACTION_UP in this case


上面的答案之一提到處理不同的像素密度,但建議手動計算滑動參數。 值得注意的是,您實際上可以使用ViewConfiguration類從系統獲取縮放的合理值:

final ViewConfiguration vc = ViewConfiguration.get(getContext());
final int swipeMinDistance = vc.getScaledPagingTouchSlop();
final int swipeThresholdVelocity = vc.getScaledMinimumFlingVelocity();
final int swipeMaxOffPath = vc.getScaledTouchSlop();
// (there is also vc.getScaledMaximumFlingVelocity() one could check against)

我注意到,使用這些值會導致應用程序和系統其餘部分之間的投擲“感覺”更加一致。


也作為一個小小的增強。

try / catch塊的主要原因是e1對於初始移動可能為空。 除try / catch之外,還包括對null和return的測試。 類似於以下內容

if (e1 == null || e2 == null) return false;
try {
...
} catch (Exception e) {}
return false;

對於使用ViewConfiguration的網頁(和本頁)有一些建議。 getScaledTouchSlop()SWIPE_MIN_DISTANCE設置一個設備縮放值。

getScaledTouchSlop()用於“ 滾動閾值”距離,而不是滑動。 滾動閾值距離必須小於“頁面間擺動”閾值距離。 例如,這個函數在我的Samsung GS2上返回12個像素,本頁中引用的例子大約為100個像素。

通過API Level 8(Android 2.2,Froyo),您getScaledPagingTouchSlop() ,用於頁面滑動。 在我的設備上,它返回24(像素)。 因此,如果您的API級別<8,我認為“2 * getScaledTouchSlop() ”應該是“標準”刷卡閾值。 但是我的小屏幕應用程序的用戶告訴我,它太少了......就像我的應用程序一樣,您可以垂直滾動,並橫向更改頁面。 使用建議的值,他們有時會更改頁面而不是滾動頁面。


您可以使用droidQuery庫來處理droidQuery ,點擊,長時間點擊和自定義事件。 該實現建立在我以前的答案下面,但是droidQuery提供了一個簡潔而簡單的語法:

//global variables    private boolean isSwiping = false;
private SwipeDetector.Direction swipeDirection = null;
private View v;//must be instantiated before next call.

//swipe-handling code
$.with(v).swipe(new Function() {
    @Override
    public void invoke($ droidQuery, Object... params) {
        if (params[0] == SwipeDetector.Direction.START)
            isSwiping = true;
        else if (params[0] == SwipeDetector.Direction.STOP) {
            if (isSwiping) {                    isSwiping = false;
                if (swipeDirection != null) {
                    switch(swipeDirection) {
                        case DOWN :                                //TODO: Down swipe complete, so do something
                            break;
                        case UP :
                            //TODO: Up swipe complete, so do something
                            break;
                        case LEFT :
                            //TODO: Left swipe complete, so do something
                            break;
                        case RIGHT :
                            //TODO: Right swipe complete, so do something
                            break;
                        default :                                break;
                    }
                }                }
        }
        else {
            swipeDirection = (SwipeDetector.Direction) params[0];
        }
    }
});

原始答复

這個答案使用了來自其他答案的組件的組合。 它由SwipeDetector類組成,它有一個用於監聽事件的內部接口。 我還提供了一個RelativeLayout來展示如何覆蓋ViewonTouch方法,以允許滑動事件和其他檢測到的事件(如點擊或長時間點擊)。

SwipeDetector

package self.philbrown;

import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;

/**
 * Detect Swipes on a per-view basis. Based on original code by Thomas Fankhauser on .com,
 * with adaptations by other authors (see link).
 * @author Phil Brown
 * @see <a href="http://.com/questions/937313/android-basic-gesture-detection">android-basic-gesture-detection</a>
 */
public class SwipeDetector implements View.OnTouchListener
{
    /**
     * The minimum distance a finger must travel in order to register a swipe event.
     */
    private int minSwipeDistance;

    /** Maintains a reference to the first detected down touch event. */
    private float downX, downY;

    /** Maintains a reference to the first detected up touch event. */
    private float upX, upY;

    /** provides access to size and dimension contants */
    private ViewConfiguration config;

    /**
     * provides callbacks to a listener class for various swipe gestures.
     */
    private SwipeListener listener;

    public SwipeDetector(SwipeListener listener)
    {
        this.listener = listener;
    }


    /**
     * {@inheritDoc}
     */
    public boolean onTouch(View v, MotionEvent event)
    {
        if (config == null)
        {
                config = ViewConfiguration.get(v.getContext());
                minSwipeDistance = config.getScaledTouchSlop();
        }

        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;

            // swipe horizontal?
            if(Math.abs(deltaX) > minSwipeDistance)
            {
                // left or right
                if (deltaX < 0)
                {
                        if (listener != null)
                        {
                                listener.onRightSwipe(v);
                                return true;
                        }
                }
                if (deltaX > 0)
                {
                        if (listener != null)
                        {
                                listener.onLeftSwipe(v);
                                return true;
                        }
                }
            }

            // swipe vertical?
            if(Math.abs(deltaY) > minSwipeDistance)
            {
                // top or down
                if (deltaY < 0)
                {
                        if (listener != null)
                        {
                                listener.onDownSwipe(v);
                                return true;
                        }
                }
                if (deltaY > 0)
                {
                        if (listener != null)
                        {
                                listener.onUpSwipe(v);
                                return true;
                        }
                }
            }
        }
        return false;
    }

    /**
     * Provides callbacks to a registered listener for swipe events in {@link SwipeDetector}
     * @author Phil Brown
     */
    public interface SwipeListener
    {
        /** Callback for registering a new swipe motion from the bottom of the view toward its top. */
        public void onUpSwipe(View v);
        /** Callback for registering a new swipe motion from the left of the view toward its right. */
        public void onRightSwipe(View v);
        /** Callback for registering a new swipe motion from the right of the view toward its left. */
        public void onLeftSwipe(View v);
        /** Callback for registering a new swipe motion from the top of the view toward its bottom. */
        public void onDownSwipe(View v);
    }
}

滑動攔截器視圖

package self.philbrown;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.RelativeLayout;

import com.npeinc.module_NPECore.model.SwipeDetector;
import com.npeinc.module_NPECore.model.SwipeDetector.SwipeListener;

/**
 * View subclass used for handling all touches (swipes and others)
 * @author Phil Brown
 */
public class SwipeInterceptorView extends RelativeLayout
{
    private SwipeDetector swiper = null;

    public void setSwipeListener(SwipeListener listener)
    {
        if (swiper == null)
            swiper = new SwipeDetector(listener);
    }

    public SwipeInterceptorView(Context context) {
        super(context);
    }

    public SwipeInterceptorView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SwipeInterceptorView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public boolean onTouchEvent(MotionEvent e)
    {
        boolean swipe = false, touch = false;
        if (swiper != null)
            swipe = swiper.onTouch(this, e);
        touch = super.onTouchEvent(e);
        return swipe || touch;
    }
}

我做了一些改變,寫了一個額外的檢測器類來實現View.onTouchListener

onCreate簡單地將它添加到像這樣的最低佈局:

ActivitySwipeDetector activitySwipeDetector = new ActivitySwipeDetector(this);
lowestLayout = (RelativeLayout)this.findViewById(R.id.lowestLayout);
lowestLayout.setOnTouchListener(activitySwipeDetector);

其中id.lowestLayout是佈局層次結構中視圖最低的id.xxx,而lowestLayout則聲明為RelativeLayout

然後是實際活動滑動檢測器類:

public class ActivitySwipeDetector implements View.OnTouchListener {

static final String logTag = "ActivitySwipeDetector";
private Activity activity;
static final int MIN_DISTANCE = 100;
private float downX, downY, upX, upY;

public ActivitySwipeDetector(Activity activity){
    this.activity = activity;
}

public void onRightSwipe(){
    Log.i(logTag, "RightToLeftSwipe!");
    activity.doSomething();
}

public void onLeftSwipe(){
    Log.i(logTag, "LeftToRightSwipe!");
    activity.doSomething();
}

public void onDownSwipe(){
    Log.i(logTag, "onTopToBottomSwipe!");
    activity.doSomething();
}

public void onUpSwipe(){
    Log.i(logTag, "onBottomToTopSwipe!");
    activity.doSomething();
}

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;

       // swipe horizontal?
        if(Math.abs(deltaX) > Math.abs(deltaY))
        {
            if(Math.abs(deltaX) > MIN_DISTANCE){
                // left or right
                if(deltaX > 0) { this.onRightSwipe(); return true; }
                if(deltaX < 0) { this.onLeftSwipe(); return true; }
            }
            else {
                    Log.i(logTag, "Horizontal Swipe was only " + Math.abs(deltaX) + " long, need at least " + MIN_DISTANCE);
                    return false; // We don't consume the event
            }
        }
        // swipe vertical?
        else 
        {
            if(Math.abs(deltaY) > MIN_DISTANCE){
                // top or down
                if(deltaY < 0) { this.onDownSwipe(); return true; }
                if(deltaY > 0) { this.onUpSwipe(); return true; }
            }
            else {
                    Log.i(logTag, "Vertical Swipe was only " + Math.abs(deltaX) + " long, need at least " + MIN_DISTANCE);
                    return false; // We don't consume the event
            }
        }

            return true;
        }
    }
    return false;
}

}

對我真的很好!


我的由Thomas Fankhauser和Marek Sebera提出的解決方案版本(不處理垂直刷卡 ):

SwipeInterface.java

import android.view.View;

public interface SwipeInterface {

    public void onLeftToRight(View v);

    public void onRightToLeft(View v);
}

ActivitySwipeDetector.java

import android.content.Context;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;

public class ActivitySwipeDetector implements View.OnTouchListener {

    static final String logTag = "ActivitySwipeDetector";
    private SwipeInterface activity;
    private float downX, downY;
    private long timeDown;
    private final float MIN_DISTANCE;
    private final int VELOCITY;
    private final float MAX_OFF_PATH;

    public ActivitySwipeDetector(Context context, SwipeInterface activity){
        this.activity = activity;
        final ViewConfiguration vc = ViewConfiguration.get(context);
        DisplayMetrics dm = context.getResources().getDisplayMetrics();
        MIN_DISTANCE = vc.getScaledPagingTouchSlop() * dm.density;
        VELOCITY = vc.getScaledMinimumFlingVelocity();
        MAX_OFF_PATH = MIN_DISTANCE * 2;            
    }

    public void onRightToLeftSwipe(View v){
        Log.i(logTag, "RightToLeftSwipe!");
        activity.onRightToLeft(v);
    }

    public void onLeftToRightSwipe(View v){
        Log.i(logTag, "LeftToRightSwipe!");
        activity.onLeftToRight(v);
    }

    public boolean onTouch(View v, MotionEvent event) {
        switch(event.getAction()){
        case MotionEvent.ACTION_DOWN: {
            Log.d("onTouch", "ACTION_DOWN");
            timeDown = System.currentTimeMillis();
            downX = event.getX();
            downY = event.getY();
            return true;
        }
        case MotionEvent.ACTION_UP: {
            Log.d("onTouch", "ACTION_UP");
            long timeUp = System.currentTimeMillis();
            float upX = event.getX();
            float upY = event.getY();

            float deltaX = downX - upX;
            float absDeltaX = Math.abs(deltaX); 
            float deltaY = downY - upY;
            float absDeltaY = Math.abs(deltaY);

            long time = timeUp - timeDown;

            if (absDeltaY > MAX_OFF_PATH) {
                Log.i(logTag, String.format("absDeltaY=%.2f, MAX_OFF_PATH=%.2f", absDeltaY, MAX_OFF_PATH));
                return v.performClick();
            }

            final long M_SEC = 1000;
            if (absDeltaX > MIN_DISTANCE && absDeltaX > time * VELOCITY / M_SEC) {
                if(deltaX < 0) { this.onLeftToRightSwipe(v); return true; }
                if(deltaX > 0) { this.onRightToLeftSwipe(v); return true; }
            } else {
                Log.i(logTag, String.format("absDeltaX=%.2f, MIN_DISTANCE=%.2f, absDeltaX > MIN_DISTANCE=%b", absDeltaX, MIN_DISTANCE, (absDeltaX > MIN_DISTANCE)));
                Log.i(logTag, String.format("absDeltaX=%.2f, time=%d, VELOCITY=%d, time*VELOCITY/M_SEC=%d, absDeltaX > time * VELOCITY / M_SEC=%b", absDeltaX, time, VELOCITY, time * VELOCITY / M_SEC, (absDeltaX > time * VELOCITY / M_SEC)));
            }

        }
        }
        return false;
    }

}

有一個內置的界面,您可以直接使用所有手勢:
這是一個基本級別用戶的解釋: 有兩種進口產品在選擇兩者時都要小心謹慎


這個問題有點古怪,2011年7月谷歌發布了兼容包,第3版修改版) ,其中包括可與Android 1.6以上版本配合使用的ViewPager 。 針對此問題發布的GestureListener答案在Android上感覺不太優雅。 如果您正在尋找用於在Android圖庫中切換照片的代碼或在新的Play Market應用中切換視圖,那麼它絕對是ViewPager

以下是更多信息的鏈接:





gesture-recognition