android - 长按 Clickable span 在点击被释放之前不会触发

Question

我需要一个可点击范围，以便在我的应用程序中同时具有正常点击和长按方法，我在这里 ( In Android - How can I register only long clicks using a ClickableSpan ) 发现我可以扩展 LinkMovementMethod 类和 ClickableSpan 类以允许这样做，但目前长按和短按都有效，但是长按而不是触发长按操作当项目被按下足够长的时间时，它会等到您释放项目才能触发。这是我的扩展类代码:

LinkMovementClass

import android.text.Layout;
import android.text.Selection;
import android.text.Spannable;
import android.text.method.LinkMovementMethod;
import android.text.method.MovementMethod;
import android.view.MotionEvent;
import android.widget.TextView;

public class LongClickLinkMovementMethod extends LinkMovementMethod {

private Long lastClickTime = 0l;
private int lastX = 0;
private int lastY = 0;
@Override
public boolean onTouchEvent(TextView widget, Spannable buffer,
                            MotionEvent event) {
    int action = event.getAction();

    if (action == MotionEvent.ACTION_UP ||
            action == MotionEvent.ACTION_DOWN) {
        int x = (int) event.getX();
        int y = (int) event.getY();
        lastX = x;
        lastY = y;
        int deltaX = Math.abs(x-lastX);
        int deltaY = Math.abs(y-lastY);

        x -= widget.getTotalPaddingLeft();
        y -= widget.getTotalPaddingTop();

        x += widget.getScrollX();
        y += widget.getScrollY();

        Layout layout = widget.getLayout();
        int line = layout.getLineForVertical(y);
        int off = layout.getOffsetForHorizontal(line, x);

        LongClickableSpan[] link = buffer.getSpans(off, off, LongClickableSpan.class);

        if (link.length != 0) {
            if (action == MotionEvent.ACTION_UP) {
                if (System.currentTimeMillis() - lastClickTime < 1000)
                    link[0].onClick(widget);
                else if (deltaX < 10 && deltaY < 10)
                    link[0].onLongClick(widget);
            } else if (action == MotionEvent.ACTION_DOWN) {
                Selection.setSelection(buffer,
                        buffer.getSpanStart(link[0]),
                        buffer.getSpanEnd(link[0]));
                lastClickTime = System.currentTimeMillis();
            }
            return true;
        }
    }

    return super.onTouchEvent(widget, buffer, event);
}


public static MovementMethod getInstance() {
    if (sInstance == null)
        sInstance = new LongClickLinkMovementMethod();

    return sInstance;
}
    private static LongClickLinkMovementMethod sInstance;
}

LongClickableSpanClass

import android.text.style.ClickableSpan;
import android.view.View;

public abstract class LongClickableSpan extends ClickableSpan {

    abstract public void onLongClick(View view);
}

实际实现

LongClickableSpan eruptionText = new LongClickableSpan() {

                                @Override
                                public void onClick(View tvEruptions) {
                                    LinkFunctions.link_eruption_detail(getApplicationContext(),PostErupionID);
                                }

                                @Override
                                public void onLongClick(View tvEruptions) {
                                    if(SignedInUserID != 0) {
                                        DialogFragment newFragment = new Dialogs.QuickActionsDialogFragment();
                                        // Supply num input as an argument.
                                        Bundle args = new Bundle();
                                        args.putLong("eruptionID", PostErupionID);
                                        newFragment.setArguments(args);
                                        newFragment.show(getFragmentManager(), "QuickActions");
                                    }
                                }

                            };
                            ss.setSpan(eruptionText, startpos[(int) j], endpos[(int) j], Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

Answer 1

我知道这个问题很老，可能 OP 已经解决了这个问题，但我对原来的 LongClickLinkMovementMethod 做了一些调整，让它在时间过去后触发，而不是在我们释放水龙头时触发:

import android.os.Handler;
import android.text.Layout;
import android.text.Selection;
import android.text.Spannable;
import android.text.method.LinkMovementMethod;
import android.text.method.MovementMethod;
import android.view.MotionEvent;
import android.widget.TextView;


public class LongClickLinkMovementMethod extends LinkMovementMethod {

    private Handler mLongClickHandler;
    private static int LONG_CLICK_TIME = 1000;
    private boolean mIsLongPressed = false;

    @Override
    public boolean onTouchEvent(final TextView widget, Spannable buffer,
                                MotionEvent event) {
        int action = event.getAction();

        if(action == MotionEvent.ACTION_CANCEL){
            if(mLongClickHandler!=null){
                mLongClickHandler.removeCallbacksAndMessages(null);
            }
        }

        if (action == MotionEvent.ACTION_UP ||
                action == MotionEvent.ACTION_DOWN) {
            int x = (int) event.getX();
            int y = (int) event.getY();

            x -= widget.getTotalPaddingLeft();
            y -= widget.getTotalPaddingTop();

            x += widget.getScrollX();
            y += widget.getScrollY();

            Layout layout = widget.getLayout();
            int line = layout.getLineForVertical(y);
            int off = layout.getOffsetForHorizontal(line, x);

            final LongClickableSpan[] link = buffer.getSpans(off, off, LongClickableSpan.class);

            if (link.length != 0) {
                if (action == MotionEvent.ACTION_UP) {
                    if(mLongClickHandler!=null){
                        mLongClickHandler.removeCallbacksAndMessages(null);
                    }
                    if(!mIsLongPressed) {
                        link[0].onClick(widget);
                    }
                    mIsLongPressed = false;
                } else {
                    Selection.setSelection(buffer,
                            buffer.getSpanStart(link[0]),
                            buffer.getSpanEnd(link[0]));
                    mLongClickHandler.postDelayed(new Runnable() {
                        @Override
                        public void run() {
                            link[0].onLongClick(widget);
                            mIsLongPressed = true;
                        }
                    },LONG_CLICK_TIME);
                }
                return true;
            }
        }

        return super.onTouchEvent(widget, buffer, event);
    }


    public static MovementMethod getInstance() {
        if (sInstance == null) {
            sInstance = new LongClickLinkMovementMethod();
            sInstance.mLongClickHandler = new Handler();
        }

        return sInstance;
    }
    private static LongClickLinkMovementMethod sInstance;
}

所以基本上这使用处理程序在 1000 毫秒后触发长按事件