不能在Android上的FrameLayout检测手势 [英] Can't Detect Gesture on a FrameLayout in Android
问题描述
我想实现一个全球性的导航栏小工具在Android中,延伸的FrameLayout,以便它可以只是声明布局的XML,而不是在每一个活动包括
I want to implement a global NavigationBar Widget in android , extends FrameLayout , so that it can just declare in layout xml , not to include in every activity.
在导航栏有三个组成部分:标志,标题,按钮
当触摸或一扔下来NavgationBar(不包括按钮),我将展示something.But现在我onFling姿态不能老是被检测(OnFling在SwipeGestureListener已测试),任何一个可以帮助我。
The NavigationBar has three components:Logo , Title , Button When touch or fling down on NavgationBar(Not Including Button),I will show something.But now my onFling gesture can`t be detected(OnFling in SwipeGestureListener have been tested),any one can help me.
类导航栏:
public class NavigationBarWidget extends FrameLayout implements View.OnClickListener
private SwipeGestureListener mSwipeListener = new SwipeGestureListener();
private GestureDetector mGestureDetector;
NavigationBarWidget():
NavigationBarWidget():
mGestureDetector = new GestureDetector(mSwipeListener);
this.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.v("Nav", "onTouch");
return mGestureDetector.onTouchEvent(event);
}
});
的OnClick():
OnClick():
@Override
public void onClick(View paramView)
{
if(paramView.getId()== mShareIcon.getId()){
AlertDialog.Builder builder = new AlertDialog.Builder(this.getContext());
builder.setMessage("Are you sure you want to exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}else{
Log.v("Nav", "onClick");
}
}
onFling()在SwipeGestureListener:
onFling() in SwipeGestureListener:
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
Log.v("Nav", "onFling");
try {
if (Math.abs(e1.getX() - e2.getX()) > SWIPE_MAX_OFF_PATH)
{
return false;
}
else
{
if ((e2.getY() - e1.getY() > SWIPE_MIN_DISTANCE) && (Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY)) {
this.mCallbackListener.onFlingDown();
return true;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
logcat的:当触摸或弗林向下导航栏,onTouch已输出,但没有检测到手势onFling
Logcat:When Touch or Fling Down navigationBar , "onTouch" have been output , but gesture onFling are not detected.
推荐答案
我通过阅读在Android开发者博客中解决了它自己:
制作多点触控感。
I solved it myself by reading a post on Android Developer Blog: Making Sense of Multitouch.
解决方案就是让GestureDetector处理的手势,你可以处理触摸事件则是这样的:
The Solution is Let GestureDetector handle the gesture, you can handle touch event then like this:
mGestureDetector = new GestureDetector(mSwipeListener);
this.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.v("Nav", "onTouch");
mGestureDetector.onTouchEvent(event);
final int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:{
Log.v("Nav", "onDown");
break;
}
case MotionEvent.ACTION_UP:{
Log.v("Nav", "onUp");
break;
}
}
return true;
}
});
当我下来一扔在NavigationBarWidget日志将是:
onTouch-> onDown-> onTouch(多少onTouch给你多长时间保持屏幕上preSS) - > onFlingDown-> onUp
When I Fling Down over The NavigationBarWidget the log will be: onTouch->onDown->onTouch(how many onTouch up to how long you keep press on the screen)->onFlingDown->onUp
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