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[英]how to disable motion of ViewPager when touching specific view in this ViewPager Android?
[英]how to disable viewpager adapter on touching specific views?
我有一个viewpager在向左/向右滑动时在标签之间切换。在我的第二个标签中,我有一些自定义视图,其中有捏和拖动的监听器但是当我尝试捏或拖动时,viewpager开始刷页面。
我想到的一个解决方案是在触摸那些特定视图时禁用滑动,只有在触摸那些视图外时才滑动。这可能吗?
更新: @Asok提供了解决方案。 但后来更新了在我的情况下无法工作的代码,所以我发布了对我有用的上一段代码:
public class CustomViewPager extends ViewPager {
private boolean swipeable = true;
public CustomViewPager(Context context) {
super(context);
}
public CustomViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
// Call this method in your motion events when you want to disable or enable
// It should work as desired.
public void setSwipeable(boolean swipeable) {
this.swipeable = swipeable;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent arg0) {
return (this.swipeable) ? super.onInterceptTouchEvent(arg0) : false;
}
让我假设我有一个可拖动的视图,我需要在拖动开始时禁用滑动,并在拖动完成时重新启用,所以在我所谓的视图的TouchEvent中:
@Override
public boolean onTouchEvent(MotionEvent event) {
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
//disable swiping when the button is touched
((ActivityOriginal) getActivity()).setSwipeable(false);
//the rest of the code...
break;
case MotionEvent.ACTION_MOVE:
break;
case MotionEvent.ACTION_UP:
//re enable swipping when the touch is stopped
//the rest of the code...
((ActivityOriginal) getActivity()).setSwipeable(true);
break;
}
return true;
}
我想到的,我这第一件事情就是有一个自定义ViewPager
中,当你触摸的听众得到通知的特定事件,你可以设置swipeable
boolean
在ViewPager
为false,并设置回真哪个方式最适合你的应用程序。
public class CustomViewPager extends ViewPager {
private boolean swipeable = true;
public CustomViewPager(Context context) {
super(context);
}
public CustomViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
// Call this method in your motion events when you want to disable or enable
// It should work as desired.
public void setSwipeable(boolean swipeable) {
this.swipeable = swipeable;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent arg0) {
return (this.swipeable) ? super.onInterceptTouchEvent(arg0) : false;
}
}
确保更改布局文件以显示:
<com.your.package.CustomViewPager .. />
代替:
<android.support.v4.view.ViewPager .. />
编辑2
这是我的设置(使用上面的CustomViewPager
):
CustomViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Set up the action bar.
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create the adapter that will return a fragment for each of the three
// primary sections of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the CustomViewPager with the sections adapter.
mViewPager = (CustomViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
actionBar.addTab(actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
public void swipeOn(View v) {
mViewPager.setSwipeable(true);
}
public void swipeOff(View v) {
mViewPager.setSwipeable(false);
}
上面显示的onCreate
在我的MainActivity
类中,它扩展了FragmentActivity
并实现了ActionBar.TabListener
我正在使用requestDisallowInterceptTouchEvent(true) int视图的onTouchEvent侦听器,该侦听器也有拖动事件。
@Override
public boolean onTouchEvent(MotionEvent event) {
ViewParent parent = getParent();
// or get a reference to the ViewPager and cast it to ViewParent
parent.requestDisallowInterceptTouchEvent(true);
// let this view deal with the event or
return super.onTouchEvent(event);
}
我这样用
public void setSwipeable(boolean swipeable)
{
this.swipeable = swipeable;
}
@Override
public void scrollTo(int x, int y){
if (swipeable){
super.scrollTo(x, y);
}
}
如果您知道您不想在视图寻呼机中拦截触摸事件的位置,您可以像我一样做。
@Override
public boolean onInterceptTouchEvent(MotionEvent arg0) {
if(arg0.getY()>getHeight()/2)return false;
return super.onInterceptTouchEvent(arg0);
}
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