我有一个 HorizontalScrollView 作为 ListView 的一项。每个 HorizontalScrollView 中都有可点击的图像。水平滚动视图也应该具有特定的滚动行为。我已经为单个 HorizontalScrollView 实现了它。但现在我需要列出这些滚动视图，并且每个视图都应该有这种行为。我正在使用 ParseQueryAdapter，因为我从 parse.com 获取信息。当我尝试在每个项目上使用特定滚动的代码时，只有最后一个项目具有此行为。而且它的效果非常糟糕。但也许这是我的错。请帮我为每个项目设置 onTouchListener。以及每个项目中每个 ImageView 的 onClickListener。这是我的代码
public class CustomParseQueryAdapter extends ParseQueryAdapter<Lighter> {
Activity activity;
int rankNumber;
Bitmap bitmap;
int currentScrollViewPosition;
int middlePosition;
HorizontalScrollView itemScrollView;
RelativeLayout rankParentLayout;
RelativeLayout lighterNameAndMilesLayout;
GestureDetector gestureDetector;
public CustomParseQueryAdapter(Context context){
super(context, new QueryFactory<Lighter>() {
@Override
public ParseQuery<Lighter> create() {
ParseQuery<Lighter> query = new ParseQuery<>("Lighter");
query.orderByDescending("miles");
query.include("master");
return query;
}
});
activity = (Activity) context;
rankNumber = 1;
}
@Override
public View getItemView(Lighter lighter, View v, ViewGroup parent) {
if (v == null){
v = View.inflate(getContext(), R.layout.ranking_list_item, null);
}
super.getItemView(lighter, v, parent);
gestureDetector = new GestureDetector(new CustomGestureDetector());
itemScrollView = (HorizontalScrollView) v.findViewById(R.id.item_scroll_view);
LinearLayout itemParentLayout = (LinearLayout) v.findViewById(R.id.rank_item_linear_scroll_view);
RelativeLayout crossedCitiesParentLayout = (RelativeLayout) v.findViewById(R.id.item_crossed_cities_layout);
RelativeLayout timesCheckedParentLayout = (RelativeLayout) v.findViewById(R.id.item_times_checked_layout);
rankParentLayout = (RelativeLayout) v.findViewById(R.id.item_rank_layout);
lighterNameAndMilesLayout = (RelativeLayout) v.findViewById(R.id.item_lighter_name_and_miles_layout);
TextView crossedCitiesAmount = (TextView) v.findViewById(R.id.item_crossed_cities);
TextView timesCheckedAmount = (TextView) v.findViewById(R.id.item_times_checked);
TextView itemRankNumber = (TextView) v.findViewById(R.id.item_rank_number);
ImageView lighterImage = (ImageView) v.findViewById(R.id.item_lighter_image);
TextView lighterName = (TextView) v.findViewById(R.id.item_lighter_name);
TextView milesTravelled = (TextView) v.findViewById(R.id.item_lighter_miles_travelled);
// This userImage ImageView should have the onClickListener to start another fragment
ImageView userImage = (ImageView) v.findViewById(R.id.item_user_image);
String lighterColor = lighter.getColor();
itemParentLayout.setBackgroundColor(FragmentMap.getColor(lighterColor, activity.getResources()));
crossedCitiesParentLayout.setBackgroundColor(FragmentMap.getAnotherColor(lighterColor, activity.getResources()));
timesCheckedParentLayout.setBackgroundColor(FragmentMap.getAnotherColor(lighterColor, activity.getResources()));
rankParentLayout.setBackgroundColor(FragmentMap.getAnotherColor(lighterColor, activity.getResources()));
lighterNameAndMilesLayout.getLayoutParams().width = FragmentMap.getScreenSize(activity).x - FragmentMap.MARGIN;
crossedCitiesAmount.setText(lighter.getCitiesAmount() + " CITIES");
timesCheckedAmount.setText(lighter.getTimesChecked() + " TIMES");
itemRankNumber.setText(String.valueOf(rankNumber));
rankNumber++;
setUpLighterImage(lighterImage, lighterColor);
lighterName.setText(lighter.getLighterName().toUpperCase());
milesTravelled.setText(lighter.getIntMiles() + " MILES TRAVELLED");
final ParseUser lighterMasterUser = lighter.getParseUser("master");
final String userProfileID = lighterMasterUser.getString("profileID");
Thread thread = new Thread(new Runnable() {
public void run() {
bitmap = FragmentMap.getBitmap(userProfileID, activity);
}
});
thread.start();
try {
thread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
userImage.setImageBitmap(FragmentMap.getBitmapWithTineCircle(bitmap, activity));
middlePosition = rankParentLayout.getBottom() - FragmentMap.MARGIN;
v.post(new Runnable() {
@Override
public void run() {
itemScrollView.scrollTo(middlePosition, 0);
currentScrollViewPosition = 0;
}
});
itemScrollView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return false;
}
});
return v;
}
private void setUpLighterImage(ImageView view, String color){
switch (color){
case "red":
view.setImageResource(R.drawable.red);
break;
case "pink":
view.setImageResource(R.drawable.pink);
break;
case "green":
view.setImageResource(R.drawable.green);
break;
case "orange":
view.setImageResource(R.drawable.orange);
break;
case "yellow":
view.setImageResource(R.drawable.yellow);
break;
case "silver":
view.setImageResource(R.drawable.silver);
break;
// it is gold, but was light brown
case "gold":
view.setImageResource(R.drawable.gold);
break;
case "copper":
view.setImageResource(R.drawable.copper);
break;
}
}
class CustomGestureDetector extends GestureDetector.SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
if (e1.getX() < e2.getX()) {
getScrollPosition("left");
} else {
getScrollPosition("right");
}
// mapTitleScrollView.smoothScrollTo(scrollPosition, 0);
return true;
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY){
return true;
}
}
private void getScrollPosition(String direction){
switch (direction){
case "left":
if (currentScrollViewPosition == 1){ // if scrollview is in rightmost position move to center
toCenterPosition();
} else if (currentScrollViewPosition == 0){ // if scrollview is in center position move left
toLeftPosition();
}
break;
case "right":
if (currentScrollViewPosition == -1){ // if scrollview is in leftmost position move to center
toCenterPosition();
} else if (currentScrollViewPosition == 0){ // if scrollview is in center position move right
toRightPosition();
}
break;
}
}
private void toLeftPosition(){
currentScrollViewPosition = -1;
itemScrollView.fullScroll(HorizontalScrollView.FOCUS_LEFT);
}
private void toRightPosition(){
currentScrollViewPosition = 1;
itemScrollView.fullScroll(HorizontalScrollView.FOCUS_RIGHT);
}
private void toCenterPosition(){
currentScrollViewPosition = 0;
itemScrollView.smoothScrollTo(middlePosition, 0);
}
}
这是我的 ListView 片段代码
public class FragmentList extends ListFragment {
ApplicationInterface fragmentHolder;
CustomParseQueryAdapter mainAdapter;
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
fragmentHolder = (ApplicationInterface) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString());
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_list, container, false);
mainAdapter = new CustomParseQueryAdapter(getActivity());
setListAdapter(mainAdapter);
return view;
}
}
和 ListView 的 XML：
<ListView
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
我还需要在列表视图的整个项目上使用 onClickListener。但我认为它应该在我的FragmentList课堂上实施