我试图显示从 url 读取的图像，它们不仅仅是一个图像，所以我不得不将它们全部放在一个数组列表中，然后使图像显示在 gridview 中，由于某种原因它没有显示任何内容， gridview 完全空白，请告知我做错了什么。
BottomSheetDialog_Smiles.java
Communicator.getInstance().on("subscribe start", new Emitter.Listener() {
@Override
public void call(Object... args) {
try{
JSONDictionary response = (JSONDictionary) args[0];
String str = response.get("emojiPack").toString();
JSONArray emojies = new JSONArray(str);
for(int i=0;i<emojies.length();i++){
JSONObject response2 = (JSONObject)
emojies.getJSONObject(i);
emojiModel = new EmojiModel((String) response2.get("urlFile"));
emojiUrl = emojiModel.getEmojiFile();
Picasso.with(getApplicationContext()).load(emojiUrl);
JSONDictionary t = JSONDictionary.fromString(response2.toString());
emojiModel.init(t);
emojieModels.add(new EmojiModel(emojiUrl));
}
EmojiAdapter emojiAdapter = new EmojiAdapter(getApplicationContext(),
emojieModels);
gridView2.setAdapter(emojiAdapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
});
EmojiAdapter emojiAdapter = new EmojiAdapter(getApplicationContext(),
emojieModels);
gridView2.setAdapter(emojiAdapter);
EmojiAdapter.java
public class EmojiAdapter extends ArrayAdapter<EmojiModel> {
Context context;
ArrayList<EmojiModel> list = new ArrayList<>();
public EmojiAdapter(Context context,ArrayList<EmojiModel> list) {
super(context, R.layout.smiles_items_layout, list);
this.context = context;
this.list = list;
}
@NonNull
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater o =
(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = o.inflate(R.layout.gifts_layout_2, parent , false);
ImageView imageView = (ImageView) v.findViewById(R.id.smile_image_view);
imageView.setImageResource(Integer.parseInt((list.get(position)).urlFile));
return v;
}
}
EmojiModel.Java
public class EmojiModel {
private int id;
private int price;
public String urlFile;
public EmojiModel(String urlFile) {
this.urlFile=urlFile;
}
public String getEmojiFile() {
return urlFile;
}
public void init(JSONDictionary data){
try{
urlFile = (String) data.get("urlFile");
id = Integer.parseInt((String) data.get("id"));
price = Integer.parseInt((String) data.get("price"));
}catch(Exception e){
e.printStackTrace();
}
}
}
显然这行代码行不通：
imageView.setImageResource(Integer.parseInt((list.get(position)).urlFile));
而不是仅使用 glide 或 piccaso 加载图片。首先将此行添加到您的 gradle 文件中：
implementation 'com.github.bumptech.glide:glide:4.5.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.5.0'
然后代替上面的行，只需写： Glide.with(context).load(list.get(position)).urlFile).into(imageView);
毕加索图书馆也很相似
也以这种方式更改您的适配器：
public class EmojiAdapter extends BaseAdapter {
Context context;
ArrayList<EmojiModel> list = new ArrayList<>();
public EmojiAdapter(Context context,ArrayList<EmojiModel> list) {
super(context, R.layout.smiles_items_layout, list);
this.context = context;
this.list = list;
}
@NonNull
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater o =
(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = o.inflate(R.layout.gifts_layout_2, parent , false);
ImageView imageView = (ImageView) v.findViewById(R.id.smile_image_view);
imageView.setImageResource(Integer.parseInt((list.get(position)).urlFile));
return v;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return position;
}
}
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我来说两句