我有一个ViewPager设置为负值边距,以获得如下效果：
现在,我想要发生的是当我点击当前视图左侧或右侧的视图.它应该选择该视图,并在ViewPager上调用setCurrentItem().这可以在当前项目右侧的视图中正常工作,但不能查看当前项目的左侧.当我点击该视图时,向我报告的位置是当前视图的位置.
这有一些代码,如果它有帮助.这是从PagerAdapter.instantiateItem()我在onClick()上触发：
@Override
public Object instantiateItem(final ViewGroup container,final int position)
{
cardlayout.setTag(profile);
cardlayout.setonClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
// mOnItemClickListener passed in to adapter on initialization
mOnItemClickListener.onItemClick(null,view,position,0);
// other stuff happens here as well
}
});
}
任何感兴趣的人都可以使用整个PagerAdapter类：
static class GiveTenPagerAdapter extends PagerAdapter
{
private final int ANIMATION_DURATION;
private ListenerOnGiveTakeClick mListenerOnGiveTakeClick;
private List<GiveTen> mGiveTens;
private Context mContext;
private LayoutInflater mInflater;
private boolean mIsCrossFadeAnimationRunning;
private int mSquarePhotoSideLength;
GiveTenPagerAdapter(List<GiveTen> giveTens,Context context,ListenerOnGiveTakeClick listenerOnGiveTakeClick)
{
mGiveTens = giveTens;
mContext = context;
mListenerOnGiveTakeClick = listenerOnGiveTakeClick;
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ANIMATION_DURATION = mContext.getResources().getInteger(android.R.integer.config_mediumAnimTime);
}
List<GiveTen> getGiveTens()
{
return this.mGiveTens;
}
@Override
public int getCount()
{
return mGiveTens.size();
}
@Override
public boolean isViewFromObject(View view,Object o)
{
return view == o;
}
@Override
public Object instantiateItem(final ViewGroup container,final int position)
{
Logger.d("position=" + position);
final GiveTen giveTen = mGiveTens.get(position);
final UserProfile profile = giveTen.getUserProfile();
final RelativeLayout cardlayout = (RelativeLayout) mInflater.inflate(R.layout.give_ten_card,null);
final RelativeLayout profilePicLayout = (RelativeLayout) cardlayout.findViewById(R.id.give_ten_profile_pic_layout);
final ImageView profileImageView = (ImageView) cardlayout.findViewById(R.id.give_ten_profile_pic);
final View viewFiller = cardlayout.findViewById(R.id.view_filler);
final int RADIUS = Math.round(mContext.getResources().getDimension(R.dimen.give_ten_card_corner_radius));
profileImageView.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener()
{
@Override
public boolean onPreDraw()
{
profileImageView.getViewTreeObserver().removeOnPreDrawListener(this);
//kv Using Math.max() to ensure that at least 1 dimension is positive
//kv in case of some fucked up situation where the measured width and
//kv height returns 0
int widthProfileImageView = Math.max(profileImageView.getMeasuredWidth(),1);
int heightcardlayout = Math.max(profileImageView.getMeasuredHeight(),1);
//kv Somehow we can get into a situation where we in this PreDrawListener and there
//kv are not give tens,which of course gives us a crash on mGiveTens.get(position)
//kv If we find ourselves in that case,just show icon_photo_placement_lg
if (mGiveTens.size() > 0)
{
Picasso picasso = Picasso.with(Bakery.getInstance());
picasso.setIndicatorsEnabled(BuildConfig.DEBUG);
picasso.load(mGiveTens.get(position).getUserProfile().getProfilePic().getUrl())
.noFade()
.resize(widthProfileImageView,heightcardlayout)
.centerCrop()
.transform(new PicassoTransformationRounded(RADIUS,0))
.into(profileImageView);
}
else
{
profileImageView.setimageResource(R.drawable.icon_photo_placement_lg);
}
return true;
}
});
TextView profilePicGenderCriteriaTextView = (TextView) cardlayout.findViewById(R.id.give_ten_profile_pic_textview_gender_criteria);
TextView profilePicCityTextView = (TextView) cardlayout.findViewById(R.id.give_ten_profile_pic_textview_city);
if (profile.getCriteriaGender().equals("m"))
{
profilePicGenderCriteriaTextView.setText(R.string.give_ten_text_gender_criteria_male);
}
else
{
profilePicGenderCriteriaTextView.setText(R.string.give_ten_text_gender_criteria_female);
}
String cityText = mContext.getResources().getString(R.string.give_ten_profile_pic_text_city_prefix)
+ " "
+ mGiveTens.get(position).getUserProfile().getCity()
+ ","
+ mGiveTens.get(position).getUserProfile().getState();
profilePicCityTextView.setText(cityText);
container.addView(cardlayout);
final RelativeLayout giveTenDetailsLayout = getDetailsLayout(cardlayout,giveTen);
viewFiller.setonClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
Logger.d("view=" + view);
boolean shouldCrossFade = !mListenerOnGiveTakeClick.onGiveTenClick(position - 1,true);
if (mIsCrossFadeAnimationRunning == false && position > 0 && shouldCrossFade)
{
crossfadeViews(profilePicLayout,giveTenDetailsLayout);
ManagerAnalytics.sendEvent(ManagerAnalytics.EVENT_VISITED_GIVE_TEN_CARD,ManagerAnalytics.ST1_PAGEVIEW);
}
}
});
View.OnClickListener onClickListener = new View.OnClickListener()
{
@Override
public void onClick(View view)
{
Logger.d("view=" + view);
boolean shouldCrossFade = !mListenerOnGiveTakeClick.onGiveTenClick(position,false);
if (mIsCrossFadeAnimationRunning == false && shouldCrossFade)
{
crossfadeViews(giveTenDetailsLayout,profilePicLayout);
ManagerAnalytics.sendEvent(ManagerAnalytics.EVENT_VISITED_GIVE_TEN_CARD,ManagerAnalytics.ST1_PAGEVIEW);
}
}
};
cardlayout.setonClickListener(onClickListener);
ScrollView giveTenCardDetailScrollContainer = (ScrollView) cardlayout.findViewById(R.id.give_ten_card_detail_scroll_container);
if (giveTenCardDetailScrollContainer != null)
{
LinearLayout giveTenDetailsFieldLayout = (LinearLayout) giveTenCardDetailScrollContainer.findViewById(R.id.give_ten_detail_fields_layout);
giveTenDetailsFieldLayout.setTag(profile);
giveTenDetailsFieldLayout.setonClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
Logger.d("view=" + view);
boolean shouldCrossFade = !mListenerOnGiveTakeClick.onGiveTenClick(position,false);
if (mIsCrossFadeAnimationRunning == false && shouldCrossFade)
{
crossfadeViews(profilePicLayout,giveTenDetailsLayout);
ManagerAnalytics.sendEvent(ManagerAnalytics.EVENT_VISITED_GIVE_TEN_CARD,ManagerAnalytics.ST1_PAGEVIEW);
}
}
});
}
return cardlayout;
}
private void crossfadeViews(final View view1,final View view2)
{
final View visibleView,invisibleView;
if (view1.getVisibility() == View.VISIBLE)
{
visibleView = view1;
invisibleView = view2;
}
else
{
visibleView = view2;
invisibleView = view1;
}
mIsCrossFadeAnimationRunning = true;
invisibleView.setAlpha(0.0f);
invisibleView.setVisibility(View.VISIBLE);
invisibleView.animate()
.alpha(1.0f)
.setDuration(ANIMATION_DURATION)
.setListener(new AnimatorListenerAdapter()
{
@Override
public void onAnimationEnd(Animator animation)
{
mIsCrossFadeAnimationRunning = false;
}
});
visibleView.animate()
.alpha(0.0f)
.setDuration(ANIMATION_DURATION)
.setListener(new AnimatorListenerAdapter()
{
@Override
public void onAnimationEnd(Animator animation)
{
visibleView.setVisibility(View.GONE);
mIsCrossFadeAnimationRunning = false;
}
});
}
public void crossFadeViews(View view)
{
final RelativeLayout giveTenDetailLayout = (RelativeLayout) view.findViewById(R.id.give_ten_detail_layout);
final RelativeLayout profilePicLayout = (RelativeLayout) view.findViewById(R.id.give_ten_profile_pic_layout);
crossfadeViews(profilePicLayout,giveTenDetailLayout);
}
private RelativeLayout getDetailsLayout(View parent,GiveTen giveTen)
{
RelativeLayout giveTenDetailsLayout = (RelativeLayout) parent.findViewById(R.id.give_ten_detail_layout);
UserProfile profile = giveTen.getUserProfile();
TextView genderCriteriaTextView = (TextView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_gender_criteria_textview);
if (profile.getCriteriaGender().equals("m"))
{
genderCriteriaTextView.setText(R.string.give_ten_text_gender_criteria_male);
}
else
{
genderCriteriaTextView.setText(R.string.give_ten_text_gender_criteria_female);
}
TextView cityTextView = (TextView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_city_textview);
cityTextView.setText(profile.getCity() + "," + giveTen.getUserProfile().getState());
TextView ageTextView = (TextView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_age_textview);
ageTextView.setText(mContext.getResources().getString(R.string.give_ten_text_age)
+ " "
+ DateUtils.getAgeFromBirthday(profile.getBirthday()));
TextView heightTextView = (TextView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_height_textview);
heightTextView.setText(mContext.getResources().getString(R.string.give_ten_text_height)
+ " "
+ profile.getHeightFeet()
+ "'"
+ profile.getHeightInches());
TextView religionTextView = (TextView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_religion_textview);
religionTextView.setText((mContext.getResources().getStringArray(R.array.religion)[Religion.getIndex(profile.getReligionApiparam())]));
TextView educationTextView0 = (TextView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_education_1_textview);
TextView educationTextView1 = (TextView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_education_2_textview);
List<String> education = profile.getEducation();
List<Degree> degree = profile.getListdegrees();
if (education.size() > 0)
{
if (degree.size() > 0)
{
educationTextView0.setText(education.get(0) + "/" + degree.get(0).toString().toLowerCase());
}
else
{
educationTextView0.setText(education.get(0));
}
if (education.size() > 1)
{
if (degree.size() > 1)
{
educationTextView1.setText(education.get(1) + "/" + degree.get(1).toString().toLowerCase());
}
else
{
educationTextView1.setText(education.get(1));
}
educationTextView1.setVisibility(View.VISIBLE);
}
}
TextView occupation = (TextView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_occupation_textview);
occupation.setText(profile.getoccupation());
final List<ImageView> giveTenDetailPics = new ArrayList<ImageView>();
giveTenDetailPics.add((ImageView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_pic_1));
giveTenDetailPics.add((ImageView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_pic_2));
giveTenDetailPics.add((ImageView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_pic_3));
giveTenDetailPics.add((ImageView) giveTenDetailsLayout.findViewById(R.id.give_ten_detail_pic_4));
//kv Calculate length of side for photos
float widthPhotoLayout = ViewUtils.getScreenWidth() -
2 * mContext.getResources().getDimension(R.dimen.give_ten_layout_margin_side) -
2 * mContext.getResources().getDimension(R.dimen.give_ten_detail_margin_side) -
6 * mContext.getResources().getDimension(R.dimen.give_ten_photo_margin_side);
mSquarePhotoSideLength = (int) (widthPhotoLayout / 4);
List<Photo> detailPhotos = profile.getPhotos();
for (int i = 0; i < detailPhotos.size(); i++)
{
final ImageView imageView = giveTenDetailPics.get(i);
final Photo photo = detailPhotos.get(i);
final String url = photo.getUrlThumbnail();
Logger.d("about to display " + url + ",length=" + mSquarePhotoSideLength);
Picasso.with(mContext)
.load(url)
.noFade()
.resize(mSquarePhotoSideLength,mSquarePhotoSideLength)
.placeholder(R.drawable.icon_photo_placement_s)
.into(imageView,new Callback()
{
@Override
public void onSuccess()
{
//Logger.e("success on " + url);
}
@Override
public void onError()
{
Logger.e("error");
}
});
}
return giveTenDetailsLayout;
}
@Override
public void destroyItem(ViewGroup container,int position,Object object)
{
container.removeView((View) object);
}
}
解决方法
您可以拦截触摸事件并从该事件中获取坐标.
if(event.getRawX() < margin && canGoLeft){
goLeft();
}
else if(event.getRawX() > screenWidth - margin && canGoRight) {
goRight();
}
else {
// We are not interested in this event,pass it down the food chain
}