Question

我想在两个活动之间创建简单的滑动手势，我已经搜索了很多类似下面的内容。但我怀疑的是我如何使用滑动手势滑动活动或视图!!

class MyGestureDetector extends SimpleOnGestureListener {
        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            try {
                if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
                    return false;
                // right to left swipe
                if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                    Toast.makeText(SelectFilterActivity.this, "Left Swipe", Toast.LENGTH_SHORT).show();
                }  else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                    Toast.makeText(SelectFilterActivity.this, "Right Swipe", Toast.LENGTH_SHORT).show();
                }
            } catch (Exception e) {
                // nothing
            }
            return false;
        }

希望有人能帮助我@Thanks！

Answer 1

立即试用此代码..

page = (LinearLayout) findViewById(R.id.flipper);

@Override
public boolean dispatchTouchEvent(MotionEvent event) {
    super.dispatchTouchEvent(event);
    return gestureDetector.onTouchEvent(event);
}

SimpleOnGestureListener simpleOnGestureListener = new SimpleOnGestureListener() {

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

        float sensitvity = 50;
        if ((e1.getX() - e2.getX()) > sensitvity) {
            SwipeLeft();
        } else if ((e2.getX() - e1.getX()) > sensitvity) {
            SwipeRight();
        }

        return true;
    }

};

 GestureDetector gestureDetector = new GestureDetector(
        simpleOnGestureListener);



private void SwipeLeft() {

     page.setInAnimation(animFlipInForeward);
      page.setOutAnimation(animFlipOutForeward);
      page.showNext();

}


 private void SwipeRight() { 

     page.setInAnimation(animFlipInBackward);
     page.setOutAnimation(animFlipOutBackward);
     page.showPrevious();

}

Answer 2

implement your activity with OnGestureListener

 yourview.setOnTouchListener(touchListener);

实现touchListener，如下所示

 OnTouchListener touchListener = new OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                gestureScanner.onTouchEvent(event);
                return false;
            }
        };

用于滑动的onFling方法。

  public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
                    float velocityY) {
                try {
//                  if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
//                      return false;
                    // right to left swipe
                     if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE  && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                         viewFlipper.setInAnimation(animFlipInPrevious);
                         viewFlipper.setOutAnimation(animFlipOutPrevious);
                         Globle.falg =false;
                    if (count != 2) {
                        if (count == 2) {
                            count = 0;
                        } else {
                            count = count + 1;
                        }
                        if (currentView == 0) {
                            viewFlipper.showNext();
                            currentView = 1;
                        } else if (currentView == 1) {
                            viewFlipper.showNext();
                            currentView = 2;
                        } else {
                            currentView = 0;
                            viewFlipper.showNext();
                        }
                    }
                    count = viewFlipper.getDisplayedChild();
                    } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE  && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                        viewFlipper.setInAnimation(animFlipInNext);
                        viewFlipper.setOutAnimation(animFlipOutNext);
                        Globle.falg =false;
                    if (count != 0) {
                        if (count == 0) {
                            count = 2;
                        } else {
                            count = count - 1;
                        }
                        if (currentView == 2) {
                            currentView = 1;
                            viewFlipper.showPrevious();
                        } else if (currentView == 1) {
                            currentView = 0;
                            viewFlipper.showPrevious();
                        } else {
                            currentView = 2;
                            viewFlipper.showPrevious();
                        }
                    }
                    count = viewFlipper.getDisplayedChild();
                }
                } catch (Exception e) {
                    // nothing
                }
                return false;
            }
        }

如上面的代码，您可以更改您的视图，在我的情况下有三个视图，但您只需要两个以上更改计数值。这对你有帮助。

Answer 3

public class Main extends Activity implements OnGestureListener {

    private GestureDetector gDetector;
    private static final int SWIPE_MIN_DISTANCE = 120;
    private static final int SWIPE_MAX_OFF_PATH = 250;
    private static final int SWIPE_THRESHOLD_VELOCITY = 200;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        gDetector = new GestureDetector(this);
    }


    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        try {
            if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) {
                return false;
            }
            // right to left swipe
            if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                ((ImageView) findViewById(R.id.image_place_holder))
                        .setImageResource(R.drawable.down);

            }
            // left to right swipe
            else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                ((ImageView) findViewById(R.id.image_place_holder))
                        .setImageResource(R.drawable.up);

            }
        } catch (Exception e) {

        }
        return false;
    }

}

Answer 4

看到此链接可能会对您有所帮助。

gestures detector

或者您必须在应用中使用viewpager。

对于viewpager，以下链接将为您提供帮助

view-pager-example

创建简单的手势，从左到右，从右到左滑动

4 个答案: