[英]View Pager Android Filter Touch Events
I am using a view pager to create a picture gallery. 我正在使用视图寻呼机创建图片库。 I currently have a custom ImageView that allows a user to pinch and zoom and pan.
我目前有一个自定义ImageView,它允许用户捏和缩放和平移。 The problem I have is how do I differentiate between a pinch to zoom/pan and a switching of a page in the view pager.
我的问题是如何区分视图缩放器中的缩放/平移和页面切换。
I tried to use onInterceptTouchEvent for the view pager, but this method only captures a single point touch event of action down. 我尝试将onInterceptTouchEvent用于视图寻呼机,但是此方法仅捕获向下动作的单点触摸事件。 So it is impossible to differentiate a down touch with two fingers going down for a pinch to zoom.
因此,不可能用两根手指向下按下以放大缩放来区分向下触摸。
I tried implementing a touch listener on the View Pager, but get a series of errors. 我尝试在View Pager上实现触摸侦听器,但遇到了一系列错误。 Below is the code followed by the errors.
下面是错误后面的代码。
viewPager.setOnTouchListener(new OnTouchListener() { viewPager.setOnTouchListener(new OnTouchListener(){
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.d("Action", "Action-Touch List "+Integer.toString(getAction(event.getAction())));
int action = getAction(event.getAction());
View vv =(View) viewPager.getChildAt(0);
ImageZoomView izv= (ImageZoomView) vv.findViewById(R.id.ViewImagePreview);
if (Float.compare(izv.getZoomState().getPanX(), 0.5f) == 0
&& Float.compare(izv.getZoomState().getPanY(), 0.5f) == 0
&& Float.compare(izv.getZoomState().getZoom(), 1.0f) == 0
&& action != ACTION_MULTITOUCH_DOWN
&& action != ACTION_MULTITOUCH_UP) {
**Error Here**viewPager.onTouchEvent(event);
return true;
} else {
izv.onTouchEvent(event);
return true;
}
}
});
getaction works correctly for multiple touches, etc. getaction可以正确地用于多个触摸等。
04-28 12:03:57.365: E/AndroidRuntime(6662): FATAL EXCEPTION: main
04-28 12:03:57.365: E/AndroidRuntime(6662): java.lang.ArrayIndexOutOfBoundsException
04-28 12:03:57.365: E/AndroidRuntime(6662): at android.view.MotionEvent.getX(MotionEvent.java:907)
04-28 12:03:57.365: E/AndroidRuntime(6662): at android.support.v4.view.MotionEventCompatEclair.getX(MotionEventCompatEclair.java:32)
04-28 12:03:57.365: E/AndroidRuntime(6662): at android.support.v4.view.MotionEventCompat$EclairMotionEventVersionImpl.getX(MotionEventCompat.java:86)
04-28 12:03:57.365: E/AndroidRuntime(6662): at android.support.v4.view.MotionEventCompat.getX(MotionEventCompat.java:210)
04-28 12:03:57.365: E/AndroidRuntime(6662): at android.support.v4.view.ViewPager.onTouchEvent(ViewPager.java:1771)
04-28 12:03:57.365: E/AndroidRuntime(6662): at com.**See Double asterisk in above code)
Any help would be appreciated. 任何帮助,将不胜感激。
It looks like the error was because I had min version 3 in the Manifest accidentally instead of 4 or later. 看来错误是因为我不小心在清单中安装了最低版本3,而不是4或更高版本。 I am still trying to get a smooth touch enabled gallery working.
我仍在尝试使启用了平滑触摸的图库正常工作。
<uses-sdk android:minSdkVersion="8" android:targetSdkVersion="16" />
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