欢迎来到 Android人的问与答 ,在这里提问或帮助他人解答。 Question2Answer的1.6.x和1.7.x版本的中文翻译包我修改更新:

Question2answer

如何使用中文语言包

Q2A 1.6.x - Chinese Simplified (简体中文)

Q2A 1.7.x - Chinese Simplified (简体中文)


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Android的基本手势的检测

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主要通过复写SimpleOnGestureListener的相应方法实现,例子如下:
public class SelectFilterActivity extends Activity implements OnClickListener
{

    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;
    private GestureDetector gestureDetector;
    View.OnTouchListener gestureListener;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        /* ... */

        // Gesture detection
        gestureDetector = new GestureDetector(this, new MyGestureDetector());
        gestureListener = new View.OnTouchListener() {
            public boolean onTouch(View v, MotionEvent event) {
                return gestureDetector.onTouchEvent(event);
            }
        };

    }

    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;
        }

            @Override
        public boolean onDown(MotionEvent e) {
              return true;
        }
    }
}
最新提问 12月 29, 2014 分类:Android 小技巧 | 用户: forlong401 (7,050 分)

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