Android ListView OnTouchListener無法正常工作

Question

我在片段中創建了一個自定義listview。 現在，我想從左向右滑動。 我為此創建了一個偵聽器類。 但是聽眾不為我工作。

這是偵聽器類：

public class SwipeDetector implements 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 static final int HORIZONTAL_MIN_DISTANCE = 40;
private static final int VERTICAL_MIN_DISTANCE = 80;
private float downX, downY, upX, upY;
private Action mSwipeDetected = Action.None;

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

public Action getAction() {
    return mSwipeDetected;
}

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) {
                    Log.i(logTag, "Swipe Left to Right");
                    mSwipeDetected = Action.LR;
                    return true;
                }
                if (deltaX > 0) {
                    Log.i(logTag, "Swipe Right to Left");
                    mSwipeDetected = Action.RL;
                    return true;
                }
            } else 

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

這是片段：

public class FragmentOne extends Fragment implements OnClickListener {

Button addItem;
List<String> Testing;
ArrayAdapter<String> productAdapter;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    // addChildFragOne();
    // addChildFragTwo();
    View RootView = inflater.inflate(R.layout.fragment_one_layout, container, false);
    ListView productsList = (ListView) RootView.findViewById(R.id.listView1);

    Testing = new ArrayList<String>();
    Testing.add("Hey");
    Testing.add("Hey");
    Testing.add("Hey");
    Testing.add("Hey");
    productAdapter = new ArrayAdapter(getActivity(), R.layout.product_item, R.id.textView2, Testing);
    productsList.setAdapter(productAdapter);

    addItem = (Button) RootView.findViewById(R.id.button1);
    addItem.setOnClickListener(this);

    final SwipeDetector swipeDetector = new SwipeDetector();

    productsList.setOnTouchListener(swipeDetector);
    productsList.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            if (swipeDetector.swipeDetected()) {
                // do the onSwipe action
                Toast.makeText(getContext(), "Text!", Toast.LENGTH_SHORT).show();
                Testing.remove(position);
                productAdapter.notifyDataSetChanged();
            } else {
                // do the onItemClick action
            }
        }
    });

    return RootView;

}


}

為什么OnTouchListener不起作用？ 請幫忙。 謝謝

Answer 1

您setOnItemClickListener與conflicing OnTouchListener 。 在運行時，您只能使用一個，因此在您的情況下，我認為您應該使用setOnItemClickListener的OnTouchListener插件（而不是set setOnItemClickListener）。

您可以在此處閱讀的示例代碼使用ItemClickListener的OnTouchListener instea