我有一个项目，可以显示故事的网格视图。 我想将喜欢的网格视图添加到我的项目中。在我的gridview的项目中，我添加了一个imageview来处理此操作（如＆不同），如下所示： 首先，我检查我的名称是否存在于我的数组中，然后设置标记，然后在imageview的onclick中将其添加到我的数组字符串中： 我的问题是，当我喜欢我的故事时，它会添加到我的数组中并轻松显示在我最喜欢的故事中，但是当我再次单击imageview以使其不喜欢该故事时，它再次添加到数组列表中两次，并在if中运行我的代码。它永远都不会消失。
public class BinderData extends BaseAdapter {
// XML node keys
static final String KEY_TAG = "data"; // parent node
static final String KEY_ID = "id";
static final String KEY_STORYNAME = "stroryName";
static final String KEY_STORYDESC = "stroryDesc";
static final String KEY_STORYPIC = "stroryPic";
static final String KEY_STORYMUSIC = "stroryMusic";
BinderData bindingData;
LayoutInflater inflater;
List<HashMap<String, String>> DataCollection;
ViewHolder holder;
Context context;
public BinderData(Context act, List<HashMap<String, String>> map) {
this.DataCollection = map;
this.context = act;
inflater = (LayoutInflater) act
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
// TODO Auto-generated method stub
return DataCollection.size();
}
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
public View getView(final int position, View convertView, ViewGroup parent) {
View vi = convertView;
if (convertView == null) {
vi = inflater.inflate(R.layout.grid_item, null);
holder = new ViewHolder();
holder.namestory = (TextView) vi.findViewById(R.id.display_name);
holder.imgstory = (ImageView) vi.findViewById(R.id.img);
holder.fav_btn = (ImageView) vi.findViewById(R.id.favbtn);
vi.setTag(holder);
} else {
holder = (ViewHolder) vi.getTag();
}
holder.namestory.setText(DataCollection.get(position).get(KEY_STORYNAME));
Typeface type = Typeface.createFromAsset(context.getAssets(), "fonts/myfont.ttf");
holder.namestory.setTypeface(type);
String json = StoryApp.prefs.getString("name", null);
if ((json != null ? json.length() : 0) == 0) {
holder.fav_btn.setTag("unlike");
holder.fav_btn.setImageResource(R.drawable.unlike);
} else {
Gson gson1 = new Gson();
Gson gson2 = new Gson();
Gson gson3 = new Gson();
Gson gson4 = new Gson();
String json1 = StoryApp.prefs.getString("name", null);
String json2 = StoryApp.prefs.getString("desc", null);
String json3 = StoryApp.prefs.getString("pic", null);
String json4 = StoryApp.prefs.getString("music", null);
Type type1 = new TypeToken<ArrayList<String>>() {
}.getType();
My_array.stroryName_ = gson1.fromJson(json1, type1);
My_array.stroryDesc_ = gson2.fromJson(json2, type1);
My_array.stroryPic_ = gson3.fromJson(json3, type1);
My_array.stroryMusic_ = gson4.fromJson(json4, type1);
}
if (My_array.stroryName_.contains(DataCollection.get(position).get(KEY_STORYNAME))) {
Log.i("mahsa",My_array.stroryName_+"\n"+DataCollection.get(position).get(KEY_STORYNAME));
holder.fav_btn.setImageResource(R.drawable.likee);
holder.fav_btn.setTag("like");
} else {
holder.fav_btn.setImageResource(R.drawable.unlike);
holder.fav_btn.setTag("unlike");
}
holder.fav_btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (holder.fav_btn.getTag().equals("like")){
My_array.stroryName_.remove(DataCollection.get(position).get(KEY_STORYNAME));
My_array.stroryDesc_.remove(DataCollection.get(position).get(KEY_STORYDESC));
My_array.stroryPic_.remove(DataCollection.get(position).get(KEY_STORYPIC));
My_array.stroryMusic_.remove(DataCollection.get(position).get(KEY_STORYMUSIC));
holder.fav_btn.setImageResource(R.drawable.unlike);
Log.i("mm4","like"+holder.fav_btn.getTag());
Log.i("mm5", My_array.stroryName_ + "\n" + My_array.stroryDesc_ + "\n" + My_array.stroryPic_ + "\n+" + My_array.stroryMusic_);
SharedPreferences.Editor editor = StoryApp.prefs.edit();
Gson gson1 = new Gson();
Gson gson2 = new Gson();
Gson gson3 = new Gson();
Gson gson4 = new Gson();
String json1 = gson1.toJson(My_array.stroryName_);
String json2 = gson2.toJson(My_array.stroryDesc_);
String json3 = gson3.toJson(My_array.stroryPic_);
String json4 = gson4.toJson(My_array.stroryMusic_);
editor.putString("name", json1);
editor.putString("desc", json2);
editor.putString("pic", json3);
editor.putString("music", json4);
editor.apply();
holder.fav_btn.setTag("unlike");
Log.i("mm6","like"+holder.fav_btn.getTag());
}else {
My_array.stroryName_.add(DataCollection.get(position).get(KEY_STORYNAME));
My_array.stroryDesc_.add(DataCollection.get(position).get(KEY_STORYDESC));
My_array.stroryPic_.add(DataCollection.get(position).get(KEY_STORYPIC));
My_array.stroryMusic_.add(DataCollection.get(position).get(KEY_STORYMUSIC));
holder.fav_btn.setImageResource(R.drawable.likee);
Log.i("mm1","unlike"+holder.fav_btn.getTag());
Log.i("mm2", My_array.stroryName_ + "\n" + My_array.stroryDesc_ + "\n" + My_array.stroryPic_ + "\n+" + My_array.stroryMusic_);
holder.fav_btn.setTag("like");
SharedPreferences.Editor editor = StoryApp.prefs.edit();
Gson gson1 = new Gson();
Gson gson2 = new Gson();
Gson gson3 = new Gson();
Gson gson4 = new Gson();
String json1 = gson1.toJson(My_array.stroryName_);
String json2 = gson2.toJson(My_array.stroryDesc_);
String json3 = gson3.toJson(My_array.stroryPic_);
String json4 = gson4.toJson(My_array.stroryMusic_);
editor.putString("name", json1);
editor.putString("desc", json2);
editor.putString("pic", json3);
editor.putString("music", json4);
editor.apply();
Log.i("mm3","like"+holder.fav_btn.getTag());
}
bindingData = new BinderData(StoryApp.context, DataCollection);
gridView.setAdapter(bindingData);
}
});
// Setting an image
InputStream is = null;
AssetManager assetManager = vi.getContext().getAssets();
try {
is = assetManager.open("img/" + DataCollection.get(position).get(KEY_STORYPIC));
} catch (IOException e) {
e.printStackTrace();
}
final Bitmap bitmap = BitmapFactory.decodeStream(is);
holder.imgstory.setImageBitmap(bitmap);
long itemId = getItemId(position);
return vi;
}
static class ViewHolder {
TextView namestory;
ImageView imgstory;
ImageView fav_btn;
}
这是我的活动：
public class StoryList_Activity extends Activity {
// XML node keys
static final String KEY_TAG = "data";
static final String KEY_ID = "id";
static final String KEY_STORYNAME = "stroryName";
static final String KEY_STORYDESC = "stroryDesc";
static final String KEY_STORYPIC = "stroryPic";
static final String KEY_STORYMUSIC = "stroryMusic";
// List items
public static GridView gridView;
public static List<HashMap<String, String>> DataCollection;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_storylist);
try {
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
Document doc = docBuilder.parse(getAssets().open("data.xml"));
DataCollection = new ArrayList<HashMap<String, String>>();
// normalize text representation
doc.getDocumentElement().normalize();
NodeList placeList = doc.getElementsByTagName("data");
HashMap<String, String> map = null;
for (int i = 0; i < placeList.getLength(); i++) {
map = new HashMap<String, String>();
Node firstplaceNode = placeList.item(i);
if (firstplaceNode.getNodeType() == Node.ELEMENT_NODE) {
Element firstplaceElement = (Element) firstplaceNode;
NodeList idList = firstplaceElement.getElementsByTagName(KEY_ID);
Element firstIdElement = (Element) idList.item(0);
NodeList textIdList = firstIdElement.getChildNodes();
map.put(KEY_ID, ((Node) textIdList.item(0)).getNodeValue().trim());
NodeList story_name = firstplaceElement.getElementsByTagName(KEY_STORYNAME);
Element story_nameElement = (Element) story_name.item(0);
NodeList txtstory_name = story_nameElement.getChildNodes();
map.put(KEY_STORYNAME, ((Node) txtstory_name.item(0)).getNodeValue().trim());
NodeList story_desc = firstplaceElement.getElementsByTagName(KEY_STORYDESC);
Element story_descElement = (Element) story_desc.item(0);
NodeList txtstory_descElement = story_descElement.getChildNodes();
map.put(KEY_STORYDESC, ((Node) txtstory_descElement.item(0)).getNodeValue().trim());
NodeList story_pic = firstplaceElement.getElementsByTagName(KEY_STORYPIC);
Element story_picElement = (Element) story_pic.item(0);
NodeList txtstory_picElement = story_picElement.getChildNodes();
map.put(KEY_STORYPIC, ((Node) txtstory_picElement.item(0)).getNodeValue().trim());
NodeList story_music = firstplaceElement.getElementsByTagName(KEY_STORYMUSIC);
Element story_musicElement = (Element) story_music.item(0);
NodeList txtstory_musicElement = story_musicElement.getChildNodes();
map.put(KEY_STORYMUSIC, ((Node) txtstory_musicElement.item(0)).getNodeValue().trim());
//Add to the Arraylist
DataCollection.add(map);
}
}
gridView = (GridView) findViewById(R.id.gridview);
gridView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent i = new Intent();
i.setClass(StoryList_Activity.this, StoryShow_Activity.class);
i.putExtra("position", String.valueOf(position));
i.putExtra("name", DataCollection.get(position).get(KEY_STORYNAME));
i.putExtra("pic", DataCollection.get(position).get(KEY_STORYPIC));
i.putExtra("desc", DataCollection.get(position).get(KEY_STORYDESC));
i.putExtra("music", DataCollection.get(position).get(KEY_STORYMUSIC));
startActivity(i);
}
});
} catch (IOException ex) {
Log.e("Error", ex.getMessage());
} catch (Exception ex) {
Log.e("Error", "Loading exception");
}
}
@Override
public void onBackPressed() {
super.onBackPressed();
}
@Override
protected void onResume() {
BinderData bindingData = new BinderData(this, DataCollection);
gridView.setAdapter(bindingData);
bindingData.notifyDataSetChanged();
super.onResume();
}
这是我最喜欢的活动：
public class Favorite_list extends Activity {
static GridView gridView;
static Adaptor adaptor;
static String[] names, des, pic,music;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_storylist);
gridView = (GridView) findViewById(R.id.gridview);
names = My_array.stroryName_.toArray(new String[0]);
des = My_array.stroryDesc_.toArray(new String[0]);
pic = My_array.stroryPic_.toArray(new String[0]);
music = My_array.stroryMusic_.toArray(new String[0]);
adaptor = new Adaptor(getApplicationContext(), names);
gridView.setAdapter(adaptor);
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, final View view, int position, long id) {
}
});
}
public static class Adaptor extends ArrayAdapter<String> {
private final Context context;
private final String[] names;
public Adaptor(Context context, String[] names) {
super(context, R.layout.grid_item);
this.context = context;
this.names = names;
}
@Override
public int getCount() {
return names.length;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View rowView = inflater.inflate(R.layout.grid_item2, parent, false);
TextView name = (TextView) rowView.findViewById(R.id.display_name);
ImageView img= (ImageView) rowView.findViewById(R.id.img);
ImageView del= (ImageView) rowView.findViewById(R.id.delbtn);
// Setting an image
InputStream is = null;
AssetManager assetManager = rowView.getContext().getAssets();
try {
is = assetManager.open("img/" + pic[position]);
} catch (IOException e) {
e.printStackTrace();
}
final Bitmap bitmap = BitmapFactory.decodeStream(is);
img.setImageBitmap(bitmap);
name.setText(names[position]);
del.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
My_array.stroryName_.remove(names[position]);
My_array.stroryDesc_.remove(des[position]);
My_array.stroryPic_.remove(pic[position]);
My_array.stroryMusic_.remove(music[position]);
notifyDataSetChanged();
SharedPreferences.Editor editor = StoryApp.prefs.edit();
Gson gson = new Gson();
String json = gson.toJson(My_array.stroryName_);
editor.putString("name", json);
editor.apply();
refresh();
}
});
return rowView;
}
}
public static void refresh() {
names = My_array.stroryName_.toArray(new String[0]);
des = My_array.stroryDesc_.toArray(new String[0]);
pic = My_array.stroryPic_.toArray(new String[0]);
music = My_array.stroryMusic_.toArray(new String[0]);
adaptor = new Adaptor(StoryApp.context, names);
gridView.setAdapter(adaptor);
}
@Override
public void onBackPressed() {
super.onBackPressed();
}
@Override
protected void onResume() {
if ((My_array.stroryName_ != null ? My_array.stroryName_.size() : 0) == 0) {
} else {
Gson gson1 = new Gson();
Gson gson2 = new Gson();
Gson gson3 = new Gson();
Gson gson4 = new Gson();
String json1 = StoryApp.prefs.getString("name", null);
String json2 = StoryApp.prefs.getString("desc", null);
String json3 = StoryApp.prefs.getString("pic", null);
String json4 = StoryApp.prefs.getString("music", null);
Type type1 = new TypeToken<ArrayList<String>>() {
}.getType();
My_array.stroryName_ = gson1.fromJson(json1, type1);
My_array.stroryDesc_ = gson2.fromJson(json2, type1);
My_array.stroryPic_ = gson3.fromJson(json3, type1);
My_array.stroryMusic_ = gson4.fromJson(json4, type1);
}
refresh();
super.onResume();
}
}
答案 0 :(得分：0)
请像这样holder.fav_btn.setTag("Unlike");进行更改，您将其表示为“喜欢”
在if (holder.fav_btn.getTag().equals("like")){....}
还要更改其他部分holder.fav_btn.setTag("like");，您在这些情况下错误地添加了错误的标签