如何通过移动手指来改变活动？

Question

我想请求帮助。 你可以给我一个如何通过移动手指来改变活动的建议。（如图所示） 谢谢你的回答

图像：https://imageshack.us/download/661/xaxrzF.png

Answer 1

public class OnSwipeTouchListener implements OnTouchListener {

private final GestureDetector gestureDetector;
private SwipeGestureInterface gestureInterface;
private boolean left, right, top, bottom;
private boolean doubleTap;
private int x, y;

public OnSwipeTouchListener(Context ctx, boolean left, boolean right,
        boolean top, boolean bottom, boolean doubleTap,
        SwipeGestureInterface gestureInterface) {
    gestureDetector = new GestureDetector(ctx, new GestureListener());
    this.gestureInterface = gestureInterface;
    this.left = left;
    this.right = right;
    this.top = top;
    this.bottom = bottom;
    this.doubleTap = doubleTap;
}

private final class GestureListener extends SimpleOnGestureListener {

    private static final int SWIPE_THRESHOLD = 100;
    private static final int SWIPE_VELOCITY_THRESHOLD = 120;

    @Override
    public boolean onDown(MotionEvent e) {
        setX((int) e.getX());
        setY((int) e.getY());
        return true;
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        boolean result = false;
        try {
            float diffY = e2.getY() - e1.getY();
            float diffX = e2.getX() - e1.getX();
            if (Math.abs(diffX) > Math.abs(diffY)) {
                if (Math.abs(diffX) > SWIPE_THRESHOLD
                        && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                    if (diffX > 0) {
                        onSwipeRight();
                    } else {
                        onSwipeLeft();
                    }
                }
                result = true;
            } else if (Math.abs(diffY) > SWIPE_THRESHOLD
                    && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                if (diffY > 0) {
                    onSwipeBottom();
                } else {
                    onSwipeTop();
                }
            }
            result = true;
        } catch (Exception exception) {
            exception.printStackTrace();
        }

        Utils.log("onfling", "val Y:" + velocityY);
        return result;
    }

    @Override
    public boolean onDoubleTap(MotionEvent e) {
        // TODO Auto-generated method stub
        if (gestureInterface != null && doubleTap) {
            gestureInterface.onDoubleTap();
            return true;
        }
        return false;
    }

}

public void onSwipeRight() {
    if (gestureInterface != null && right)
        gestureInterface.onSwipeRight();
}

public void onSwipeLeft() {
    if (gestureInterface != null && left)
        gestureInterface.onSwipeLeft();
}

public void onSwipeTop() {
    if (gestureInterface != null && top)
        gestureInterface.onSwipeTop();
}

public void onSwipeBottom() {
    if (gestureInterface != null && bottom)
        gestureInterface.onSwipeBottom();
}

@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View arg0, MotionEvent event) {
    // TODO Auto-generated method stub
    gestureDetector.onTouchEvent(event);
    return false;
}

public int getX() {
    return x;
}

public void setX(int x) {
    this.x = x;
}

public int getY() {
    return y;
}

public void setY(int y) {
    this.y = y;
}

}

Answer 2

试试这个，

yourLayout.setOnTouchListener(new OnTouchListener() {

    int downX, upX;

     @Override
     public boolean onTouch(View v, MotionEvent event) {

         if (event.getAction() == MotionEvent.ACTION_DOWN) {
             downX = (int) event.getX(); 
             Log.i("event.getX()", " downX " + downX);
             return true;
         } 

         else if (event.getAction() == MotionEvent.ACTION_UP) {
             upX = (int) event.getX(); 
             Log.i("event.getX()", " upX " + downX);
             if (upX - downX > 100) {

                 // swipe right
                  //Call activity


             } 

             else if (downX - upX > -100) {

                 // swipe left
                 call activity
             }
             return true;

             }
             return false;
         }
     });

Answer 3

您可以使用GestureDetector执行此操作以下是使用您自己的活动替换左右活动的工作代码

public class MainActivity extends Activity {
  private GestureDetector gesture;
  
  @Override
  public void onCreate(Bundle savedInstanceState) 
  {
    gesture = new GestureDetector(new SwipeGestureDetector());
  }


  @Override
  public boolean onTouchEvent(MotionEvent event) 
  {
    if (gesture.onTouchEvent(event)) 
	{
      return true;
    }
    return super.onTouchEvent(event);
  }

  private void onLeft() 
  {
    Intent myIntent = new Intent(MainActivity.this, LeftActivity.class);
	startActivity(myIntent);
  }

  private void onRight() 
  {
    Intent myIntent = new Intent(MainActivity.this, RightActivity.class);
	startActivity(myIntent);
  }

  // Private class for gestures
  private class SwipeGestureDetector  extends SimpleOnGestureListener 
	{
		private static final int SWIPE_MIN_DISTANCE = 120;
		private static final int SWIPE_MAX_OFF_PATH = 200;
		private static final int SWIPE_THRESHOLD_VELOCITY = 200;

		@Override
		public boolean onFling(MotionEvent e1, MotionEvent e2,float velocityX, float velocityY) 
		{
			try 
			{
				float diffAbs = Math.abs(e1.getY() - e2.getY());
				float diff = e1.getX() - e2.getX();

				if (diffAbs > SWIPE_MAX_OFF_PATH)
				return false;
        
				// Left swipe
				if (diff > SWIPE_MIN_DISTANCE&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) 
				{
					MainActivity.this.onLeft();
				} 
				// Right swipe
				
				else if (-diff > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) 
				{
					MainActivity.this.onRight();
				}
			} 
			catch (Exception e) 
			{
				Log.e("MainActivity", "Error on gestures");
			}
			return false;
		}
	}
}

Answer 4

移动活动不是一个好方法。使用ViewPager执行滑动。 因为当您使用活动时，切换需要时间，而您可以通过视图寻呼机中的片段轻松实现切换。

请从以下链接下载代码并根据您的需要进行修改。 https://github.com/JakeWharton/ViewPagerIndicator

Answer 5

看看这个ViewPage它最适合你想要做的事情