长时间点击事件并在Android中长按

Question

我想要两个单独的事件长按单击向下和长按.我怎样才能在Android中执行此操作？

我试过的内容如下

public class FfwRewButton extends ImageButton {

    public interface ButtonListener {

        void OnLongClickDown(View v);

        void OnLongClickUp(View v);
    }

    private ButtonListener mListener;

    private boolean mLongClicked = false;

    public FfwRewButton(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setFocusable(true);
        setLongClickable(true);
    }

    public FfwRewButton(Context context) {
        this(context, null);
    }

    public FfwRewButton(Context context, AttributeSet attrs) {
        this(context, attrs, android.R.attr.imageButtonStyle);
    }

    @Override
    public boolean onKeyLongPress(int keyCode, KeyEvent event) {
        Log.d("my listener", "long press");
        mLongClicked = true;
        mListener.OnLongClickDown(this);
        return super.onKeyLongPress(keyCode, event);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        Log.d("my listener", "key down");
        mLongClicked = false;
        if (true) {
            super.onKeyDown(keyCode, event);
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        Log.d("my listener", "key up");
        if (mLongClicked)
            mListener.OnLongClickUp(this);
        return super.onKeyUp(keyCode, event);
    }

    public void setFfwRewButtonListener(ButtonListener listener) {
        mListener = listener;
    }
}

在一项活动中,我这样称呼它

private FfwRewButton.ButtonListener mListener = new FfwRewButton.ButtonListener() {

        @Override
        public void OnLongClickUp(View v) {
            Log.d(TAG, "longClickup");
        }

        @Override
        public void OnLongClickDown(View v) {
            Log.d(TAG, "longClickdown");
        }
    };

但仍然没有得到logcat中的任何日志消息任何人都可以帮助我; 哪里错了？

Answer 1

onKeyXXX() 方法用于键盘或硬键的键事件,如菜单键,搜索键等.

如果要检测MotionEvent在Android中调用的触摸事件,则必须覆盖onTouchEvent(MotionEvent e)方法并使用GestureDetector类来识别长按.

private GestureDetector mGestureDetector;

public FfwRewButton(...) {
    //....
    mGestureDetector = new GestureDetector(context, 
        new GestureDetector.SimpleOnGestureListener() {
            public boolean onDown(MotionEvent e) {
                mLongClicked = false;
                return true;
            }
            public void onLongPress(MotionEvent e) {
                mLongClicked = true;
                // long press down detected
            }
        });
    }

    public boolean onTouchEvent(MotionEvent e) {
        mGestureDetector.onTouchEvent(e);
        if (mLongClicked && e.getAction() == ACTION_UP) {
           // long press up detected
        }
    }
}