首先，viewpage预加载下一页和上一页。所以如果我现在查看pageb，它实际上也存储了page a和page c视图。
它引起了这个问题。当我在pageb中时，我按下一个onclicklistener键，它得到pagec的位置，同时，我想在pageb中更改一个image view，但是当我按下按钮后，它会在pagec中更改图像视图。
这是代码片段，我扩展了pageradapter
public class CustomPagerAdapter extends PagerAdapter {
private ArrayList<Item> items;
private LinearLayout rootView;
private NetworkImageView album;
private ImageView left;
private ImageView right;
private int imagePos;
private String[] img;
private WebView mWebView;
private ImageView i;
private ImageView i2;
private WebView fbLikeBtn;
private WebView sinaLikeBtn;
private String type;
private TextView report;
private TextView id;
private TextView name;
private TextView age_brand;
private TextView gender_model;
private TextView feature;
private TextView remarks;
private TextView location;
private TextView date;
private TextView reward;
private ImageView find;
private ImageView email;
private ImageView call;
private ImageView share;
private ImageView gps;
private ImageView play_record;
private Item item;
private String isComplete;
private LinearLayout reward_layout;
private DownloadManager mgr;
private boolean isStartPlay;
private MediaPlayer myPlayer;
private BroadcastReceiver onComplete;
private String intent_type_string;
private String intent_type;
private String intent_msg;
public CustomPagerAdapter(ArrayList<Item> items) {
this.items = items;
}
@Override
public Object instantiateItem(ViewGroup container, final int position) {
rootView = (LinearLayout) LayoutInflater.from(ctx).inflate(R.layout.item_detail, null);
item = (Item) items.get(position);
album = (NetworkImageView) rootView.findViewById(R.id.img);
left = (ImageView) rootView.findViewById(R.id.left);
right = (ImageView) rootView.findViewById(R.id.right);
share = (ImageView) rootView.findViewById(R.id.share);
find = (ImageView) rootView.findViewById(R.id.find);
email = (ImageView) rootView.findViewById(R.id.email);
call = (ImageView) rootView.findViewById(R.id.call);
gps = (ImageView) rootView.findViewById(R.id.gps);
report = (TextView) rootView.findViewById(R.id.report);
id = (TextView) rootView.findViewById(R.id.id);
name = (TextView) rootView.findViewById(R.id.name);
age_brand = (TextView) rootView.findViewById(R.id.age_brand);
gender_model = (TextView) rootView.findViewById(R.id.gender_model);
feature = (TextView) rootView.findViewById(R.id.feature);
remarks = (TextView) rootView.findViewById(R.id.remarks);
location = (TextView) rootView.findViewById(R.id.location);
date = (TextView) rootView.findViewById(R.id.date);
reward = (TextView) rootView.findViewById(R.id.reward);
play_record = (ImageView) rootView.findViewById(R.id.play_record);
reward_layout = (LinearLayout) rootView.findViewById(R.id.reward_layout);
name.setText(getResources().getString(R.string.name) + item.name);
imagePos = 0;
if (item.image_url != null) {
img = new String[item.image_url.length];
for (int i = 0; i < item.image_url.length; i++) {
img[i] = item.image_url[i];
}
if (img.length == 1) {
album.setImageUrl(Constant.request_imageFolder + item.user_id + "/" + item.image_url[0], mImageLoader);
left.setVisibility(View.GONE);
right.setVisibility(View.GONE);
} else {
album.setImageUrl(Constant.request_imageFolder
+ item.user_id + "/" + item.image_url[0],
mImageLoader);
left.setVisibility(View.GONE);
left.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (imagePos != 0) {
imagePos--;
right.setVisibility(View.VISIBLE);
album.setImageUrl(Constant.request_imageFolder
+ item.user_id + "/"
+ item.image_url[imagePos],
mImageLoader);
if (imagePos == 0)
left.setVisibility(View.GONE);
}
}
});
right.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (imagePos != item.image_url.length - 1) {
imagePos++;
left.setVisibility(View.VISIBLE);
album.setImageUrl(Constant.request_imageFolder
+ item.user_id + "/"
+ item.image_url[imagePos],
mImageLoader);
if (imagePos == item.image_url.length - 1)
right.setVisibility(View.GONE);
}
}
});
}
album.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
item = (Item) items.get(position);
Intent intent = new Intent(ctx, Zoom.class);
intent.putExtra("photo_list", item.image_url);
intent.putExtra("pos", imagePos);
intent.putExtra("user_id", item.user_id);
startActivity(intent);
}
});
} else {
album.setDefaultImageResId(R.drawable.image_null);
album.setImageResource(R.drawable.image_null);
left.setVisibility(View.GONE);
right.setVisibility(View.GONE);
}
gps.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
item = (Item) items.get(position);
Intent intent = new Intent(ctx, MapSingle.class);
intent.putExtra("msg", "ID:" + item.id + " " + intent_type_string + " - " + item.name);
intent.putExtra("lat", item.lat);
intent.putExtra("lng", item.lng);
intent.putExtra("type", intent_type_string);
startActivity(intent);
}
});
container.addView(rootView);
return rootView;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public int getCount() {
return items.size();
}
}
在代码中，变量album是更改图像的目标，而变量left和right是开关按钮。谢谢
最佳答案
您的问题是，viewpager一次将创建多个页面（默认情况下，一个在当前查看的页面之前，一个在当前查看的页面之后）。因此，您的引用将指向创建的最后一页。
理想情况下，每个页面都应该有一个custom view，它将有自己的引用。