Question

我有一个Android应用程序，其中有List View就像这个

enter image description here

现在我想以相同的方式对列表项的右/左滑动执行两个不同的活动本机呼叫日志的工作方式

右键清单

enter image description here

我想要这种类型的滑动。任何人都可以知道如何实现它。基本上我想实现SimpleOnGestureListener。

我已经阅读了 sir gav Fling gesture detection on grid layout回复的帖子，之后我成功实现了左滑动和右滑动检测，但我唯一没有得到哪个列表项滑动已经发生。

更新 2013年5月24日

现在我可以使用此代码检测滑动操作 -

SwipeDetector.java

/**
 * Class swipe detection to View
 */
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 // Action not found
    }

    private static final int HORIZONTAL_MIN_DISTANCE = 30; // The minimum
    // distance for
    // horizontal swipe
    private static final int VERTICAL_MIN_DISTANCE = 80; // The minimum distance
    // for vertical
    // swipe
    private float downX, downY, upX, upY; // Coordinates
    private Action mSwipeDetected = Action.None; // Last action

    public boolean swipeDetected() {
        return mSwipeDetected != Action.None;
    }

    public Action getAction() {
        return mSwipeDetected;
    }

    /**
     * Swipe detection
     */@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; // allow other events like Click to be processed
            }
        case MotionEvent.ACTION_MOVE:
            {
                upX = event.getX();
                upY = event.getY();

                float deltaX = downX - upX;
                float deltaY = downY - upY;

                // horizontal swipe detection
                if (Math.abs(deltaX) > HORIZONTAL_MIN_DISTANCE) {
                    // left or right
                    if (deltaX < 0) {

                        mSwipeDetected = Action.LR;
                        return true;
                    }
                    if (deltaX > 0) {

                        mSwipeDetected = Action.RL;
                        return true;
                    }
                } else

                // vertical swipe detection
                if (Math.abs(deltaY) > VERTICAL_MIN_DISTANCE) {
                    // top or down
                    if (deltaY < 0) {

                        mSwipeDetected = Action.TB;
                        return false;
                    }
                    if (deltaY > 0) {

                        mSwipeDetected = Action.BT;
                        return false;
                    }
                }
                return true;
            }
        }
        return false;
    }

}

现在以这种方式将它与ListView一起使用

    // Set the touch listener
    final SwipeDetector swipeDetector = new SwipeDetector();
    lv.setOnTouchListener(swipeDetector);

在setOnItemClickListener中，您可以检测到这些滑动事件

lv.setOnItemClickListener(new OnItemClickListener() {


    @Override
    public void onItemClick(AdapterView <? > parent, View view,
        int position, long id) {

        if (swipeDetector.swipeDetected()) {
            if (swipeDetector.getAction() == SwipeDetector.Action.LR) {

                Toast.makeText(getApplicationContext(),
                    "Left to right", Toast.LENGTH_SHORT).show();

            }
            if (swipeDetector.getAction() == SwipeDetector.Action.RL) {

                Toast.makeText(getApplicationContext(),
                    "Right to left", Toast.LENGTH_SHORT).show();

            }
        }
    }
});

但我仍然无法像这样滑动动画：

enter image description here

Answer 1

OnSwipeTouchListener.java：

import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;

public class OnSwipeTouchListener implements OnTouchListener {

    private final GestureDetector gestureDetector = new GestureDetector(new GestureListener());

    public boolean onTouch(final View view, final MotionEvent motionEvent) {

        super.onTouch(view, motionEvent);
        return gestureDetector.onTouchEvent(motionEvent);

    }

    private final class GestureListener extends SimpleOnGestureListener {

        private static final int SWIPE_THRESHOLD = 100;
        private static final int SWIPE_VELOCITY_THRESHOLD = 100;

        @Override
        public boolean onDown(MotionEvent e) {
            return true;
        }

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {

            boolean result = false;
            try {
                float diffY = e2.getY() - e1.getY();
                float diffX = e2.getX() - e1.getX();
                if (Math.abs(diffX) > Math.abs(diffY)) {
                    if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                        if (diffX > 0) {
                            onSwipeRight();
                        } else {
                            onSwipeLeft();
                        }
                    }
                } else {
                    if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                        if (diffY > 0) {
                            onSwipeBottom();
                        } else {
                            onSwipeTop();
                        }
                    }
                }
            } catch (Exception exception) {
                exception.printStackTrace();
            }
            return result;
        }
    }
    public void onSwipeRight() {}
    public void onSwipeLeft() {}
    public void onSwipeTop() {}
    public void onSwipeBottom() {}
}

用法：

imageView.setOnTouchListener(new OnSwipeTouchListener() {

    public void onSwipeTop() {
        Toast.makeText(MyActivity.this, "top", Toast.LENGTH_SHORT).show();
    }
    public void onSwipeRight() {
        Toast.makeText(MyActivity.this, "right", Toast.LENGTH_SHORT).show();
    }
    public void onSwipeLeft() {
        Toast.makeText(MyActivity.this, "left", Toast.LENGTH_SHORT).show();
    }
    public void onSwipeBottom() {
        Toast.makeText(MyActivity.this, "bottom", Toast.LENGTH_SHORT).show();
    }

});

Answer 2

您可以将Fragments用于此要求。使用FragmentPagerAdapter并覆盖getItem（int position），它将返回片段。将适配器设置为viewPager，在setOnPageChangeListener中，您可以拥有调用不同片段的逻辑。

Shrishail

Android列表视图右/左滑动，如通话记录

2 个答案: