Android的碎片onCreateView用手势用手、碎片、Android、onCreateView
2023-09-03 21:53:26
作者：乖戾
我试图利用片段中的手势;我有我的处理细节片段FragmentActivity以下里面。当一个滑动上检测的观点，以取代该视图与previous或下一个条目内的数据什么我试图有发生的是
如果有处理这更好的办法;我完全赞成。然而，这里发生的一切就是onFling方法不会实际调用。
公共静态类DetailsFragment扩展片段{
@覆盖
公共查看onCreateView（LayoutInflater充气，容器的ViewGroup，
捆绑savedInstanceState）{
如果（集装箱== NULL）{
返回null;
}
视图V = inflater.inflate（R.layout.my_view，空，假）;
最后GestureDetector姿态=新GestureDetector（getActivity（）
新GestureDetector.SimpleOnGestureListener（）{
@覆盖
公共布尔onFling（MotionEvent E1，E2 MotionEvent，浮velocityX，
浮动velocityY）{
最终诠释SWIPE_MIN_DISTANCE = 120;
最终诠释SWIPE_MAX_OFF_PATH = 250;
最终诠释SWIPE_THRESHOLD_VELOCITY = 200;
尝试 {
如果（Math.abs（e1.getY（） - e2.getY（））＆GT; SWIPE_MAX_OFF_PATH）
返回false;
如果（e1.getX（） - e2.getX（）＆GT; SWIPE_MIN_DISTANCE
＆功放;＆安培; Math.abs（velocityX）＆GT; SWIPE_THRESHOLD_VELOCITY）{
Log.i（Constants.APP_TAG，从右至左）;
}否则，如果（e2.getX（） - e1.getX（）＆GT; SWIPE_MIN_DISTANCE
＆功放;＆安培; Math.abs（velocityX）＆GT; SWIPE_THRESHOLD_VELOCITY）{
Log.i（Constants.APP_TAG，左到右）;
titles.showDetails（为getPosition（） - 1）;
}
}赶上（例外五）{
//什么
}
返回super.onFling（E1，E2，velocityX，velocityY）;
}
}）;
v.setOnTouchListener（新View.OnTouchListener（）{
@覆盖
公共布尔onTouch（视图V，MotionEvent事件）{
返回gesture.onTouchEvent（事件）;
}
}）;
返回伏;
}
}
解决方案
看起来像下面的问题说明这一点：Android: GestureDetector不会赶上手势
此外这里是结果：
解决的办法其实重写onDown方法并返回true;否则手势检测器将停止，检测不到了：
最后GestureDetector姿态=新GestureDetector（getActivity（）
新GestureDetector.SimpleOnGestureListener（）{
@覆盖
公共布尔onDown（MotionEvent E）{
返回true;
}
@覆盖
公共布尔onFling（MotionEvent E1，E2 MotionEvent，浮velocityX，
浮动velocityY）{
Log.i（Constants.APP_TAG，onFling被称为！）;
最终诠释SWIPE_MIN_DISTANCE = 120;
最终诠释SWIPE_MAX_OFF_PATH = 250;
最终诠释SWIPE_THRESHOLD_VELOCITY = 200;
尝试 {
如果（Math.abs（e1.getY（） - e2.getY（））＆GT; SWIPE_MAX_OFF_PATH）
返回false;
如果（e1.getX（） - e2.getX（）＆GT; SWIPE_MIN_DISTANCE
＆功放;＆安培; Math.abs（velocityX）＆GT; SWIPE_THRESHOLD_VELOCITY）{
Log.i（Constants.APP_TAG，从右至左）;
}否则，如果（e2.getX（） - e1.getX（）＆GT; SWIPE_MIN_DISTANCE
＆功放;＆安培; Math.abs（velocityX）＆GT; SWIPE_THRESHOLD_VELOCITY）{
Log.i（Constants.APP_TAG，左到右）;
}
}赶上（例外五）{
//什么
}
返回super.onFling（E1，E2，velocityX，velocityY）;
}
}）;
v.setOnTouchListener（新View.OnTouchListener（）{
@覆盖
公共布尔onTouch（视图V，MotionEvent事件）{
返回gesture.onTouchEvent（事件）;
}
}）;
I'm attempting to utilize Gestures within a fragment; I have the following inside of a FragmentActivity which handles my details fragment. What I am attempting to have happen is when a swipe is detected on the view to replace the data inside of that view with the previous or next entry.
If there is a better way of handling this; I am all for it. However, what is happening here is that the onFling method is never actually called.
public static class DetailsFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (container == null) {
return null;
}
View v = inflater.inflate(R.layout.my_view, null, false);
final GestureDetector gesture = new GestureDetector(getActivity(),
new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
final int SWIPE_MIN_DISTANCE = 120;
final int SWIPE_MAX_OFF_PATH = 250;
final int SWIPE_THRESHOLD_VELOCITY = 200;
try {
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Log.i(Constants.APP_TAG, "Right to Left");
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Log.i(Constants.APP_TAG, "Left to Right");
titles.showDetails(getPosition() - 1);
}
} catch (Exception e) {
// nothing
}
return super.onFling(e1, e2, velocityX, velocityY);
}
});
v.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return gesture.onTouchEvent(event);
}
});
return v;
}
}
解决方案
Looks like the following issue explains this: Android: GestureDetector won't catch Gestures
Additionally here is the result:
The solution is actually to Override the onDown method and return true; otherwise the gesture detector will stop and not detect the up:
final GestureDetector gesture = new GestureDetector(getActivity(),
new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
Log.i(Constants.APP_TAG, "onFling has been called!");
final int SWIPE_MIN_DISTANCE = 120;
final int SWIPE_MAX_OFF_PATH = 250;
final int SWIPE_THRESHOLD_VELOCITY = 200;
try {
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Log.i(Constants.APP_TAG, "Right to Left");
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Log.i(Constants.APP_TAG, "Left to Right");
}
} catch (Exception e) {
// nothing
}
return super.onFling(e1, e2, velocityX, velocityY);
}
});
v.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return gesture.onTouchEvent(event);
}
});
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