Question

我在列表视图项滑动时正在显示图像。要实现这一点，我正在使用帮助类（不是库）

帮助程序类代码

SwipeDetector

import android.annotation.SuppressLint;
import android.view.MotionEvent;
import android.view.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 // when no action was detected
    }

    //private static final String logTag = "SwipeDetector";
    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;
    }

    @SuppressLint("ClickableViewAccessibility") 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) > MIN_DISTANCE) {
                // left or right
                if (deltaX < 0) {
                    //Logger.show(Log.INFO,logTag, "Swipe Left to Right");
                    mSwipeDetected = Action.LR;
                    return true;
                }
                if (deltaX > 0) {
                    //Logger.show(Log.INFO,logTag, "Swipe Right to Left");
                    mSwipeDetected = Action.RL;
                    return true;
                }
            } else 

                // vertical swipe detection
                if (Math.abs(deltaY) > MIN_DISTANCE) {
                    // top or down
                    if (deltaY < 0) {
                        //Logger.show(Log.INFO,logTag, "Swipe Top to Bottom");
                        mSwipeDetected = Action.TB;
                        return false;
                    }
                    if (deltaY > 0) {
                        //Logger.show(Log.INFO,logTag, "Swipe Bottom to Top");
                        mSwipeDetected = Action.BT;
                        return false;
                    }
                } 
            return true;
        }
        }
        return false;
    }
}

为此，我隐藏了android:visibility="gone"等布局中的视图，当用户从右向左滑动（了解请参阅此link）并隐藏时，我正在显示图像（View.VISIBLE） View.GONE）从左向右滑动时。对于这个隐藏（View.GONE）我正在设置这样的动画

从左向右滑动

TranslateAnimation animate = new TranslateAnimation(0,ivAdptDelete.getWidth(),0,0);
                        animate.setDuration(500);
                        animate.setFillAfter(true);
                        ivAdptDelete.startAnimation(animate);
                        ivAdptDelete.setVisibility(View.GONE);


                        Runnable buttonClickable = new Runnable() {

                            @Override
                            public void run() {

                                ivAdptDelete.clearAnimation();
                            }
                        };

                        Handler pdCanceller = new Handler();
                        pdCanceller.postDelayed(buttonClickable, 500);

从右向左滑动

ivAdptDelete.setVisibility(View.VISIBLE);

我第一次从左向右滑动意味着什么都没有显示，因为我的视图被隐藏（这是正确的过程）。如果我从右向左滑动从左到右一切都很好。完成此过程后，如果我从左向右滑动意味着动画再次重复。我怀疑是当我从左向右滑动ivAdptDelete.setVisibility(View.GONE);时隐藏视图，但是当我从左向右滑动时它再次显示动画。因此，任何人都可以在第二次从左向右滑动时限制动画

找我的代码，请查看link

Android：第二次限制TranslateAnimation

0 个答案: