Android 为什么我的SimpleNogestureListener无法正常工作?
我正在使用我自己的GestureDetector类来检测左|右onFling事件。我在代码中看到的一切看起来都很好,但什么都没发生 我需要在我的切换按钮之外添加功能,该按钮在我的片段中打开|关闭导航视图。切换调用AnimationLayout类中的方法,如下所示:Android 为什么我的SimpleNogestureListener无法正常工作?,android,gesture,swipe,swipe-gesture,onfling,Android,Gesture,Swipe,Swipe Gesture,Onfling,我正在使用我自己的GestureDetector类来检测左|右onFling事件。我在代码中看到的一切看起来都很好,但什么都没发生 我需要在我的切换按钮之外添加功能,该按钮在我的片段中打开|关闭导航视图。切换调用AnimationLayout类中的方法,如下所示: public void toggleSidebar() { if (mContent.getAnimation() != null) { return; } if (mOpened) { /* opened, make close
public void toggleSidebar()
{
if (mContent.getAnimation() != null)
{
return;
}
if (mOpened)
{
/* opened, make close animation */
mAnimation = new TranslateAnimation(0, -mSidebarWidth, 0, 0);
mAnimation.setAnimationListener(mCloseListener);
} else
{
/* not opened, make open animation */
mAnimation = new TranslateAnimation(0, mSidebarWidth, 0, 0);
mAnimation.setAnimationListener(mOpenListener);
}
mAnimation.setDuration(DURATION);
mAnimation.setFillAfter(true);
mAnimation.setFillEnabled(true);
mContent.startAnimation(mAnimation);
}
而且
public void openSidebar()
{
if (!mOpened)
{
toggleSidebar();
}
}
public void closeSidebar()
{
if (mOpened)
{
toggleSidebar();
}
}
在我的主要活动中,onFling()调用toggle子活动:
public static AnimationLayout mLayout;
// these constants are used for onFling
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;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mLayout = (AnimationLayout) findViewById(R.id.animation_layout);
gestureDetector = new GestureDetector(this.getApplicationContext(), new MyGestureDetector());
// Set the touch listener for the main view to be our custom gesture
// listener
mLayout.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return false;
}
});
}
class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
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(getApplicationContext(), "right_left", Toast.LENGTH_LONG).show();
Log.i("MyGestureDetector", "R2L!");
mLayout.closeSidebar();
// left to right swipe
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Toast.makeText(getApplicationContext(), "left_right", Toast.LENGTH_LONG).show();
Log.i("MyGestureDetector", "L2R!");
mLayout.openSidebar();
}
return false;
}
// Return true from onDown for the onFling event to register
@Override
public boolean onDown(MotionEvent e) {
return true;
}
}
此按钮工作正常:
...
case R.id.navToggleBtn : {
mLayout.toggleSidebar();
}
...
我认为一个原因是手势在u-r代码中不满足的条件下工作 我已经实现了一个,请尝试一下
yourView.setOnTouchListner(onThumbTouch );
OnTouchListener onThumbTouch = new OnTouchListener()
{
float previouspoint = 0 ;
float startPoint=0;
@Override
public boolean onTouch(View v, MotionEvent event)
{
switch(v.getId())
{
case R.id.tvDetailsalaujairiyat: // Give your R.id.sample ...
{
switch(event.getAction())
{
case MotionEvent.ACTION_DOWN:
{
startPoint=event.getX();
System.out.println("Action down,..."+event.getX());
}
break;
case MotionEvent.ACTION_MOVE:
{
}break;
case MotionEvent.ACTION_CANCEL:
{
previouspoint=event.getX();
if(previouspoint > startPoint){
//Right side swape
}else{
// Left side swape
}
}break;
}
break;
}
}
return true;
}
};
我认为@Devunwired是他在上面建议的: 若布局包含也可触摸的子级,则它们可能是 从其父级(布局)窃取事件 所以我补充说:
View swipeView = (View) findViewById(R.id.animation_layout_content);
swipeView .setOnTouchListener(new View.OnTouchListener() {...});
现在它工作得非常好。您能确认您的
TouchListener
甚至接收到所有事件并转发它们吗?如果您的布局包含也可触摸的子级,则它们可能从父级(您的布局)窃取事件。我认为您可能是正确的。我将把这个函数放在子布局上,然后看一看。另一件事你可以看它onInterceptTouchEvent()。