Java 如何从url获取图像到arrayList
我试图显示从url读取的图像,它们不仅仅是图像,所以我必须将所有图像都放在arraylist中,然后使图像显示在gridview中,由于某些原因,它没有显示任何内容,gridview完全为空,请告知我做错了什么 BottomSheetDialog_Smiles.javaJava 如何从url获取图像到arrayList,java,android,gridview,arraylist,Java,Android,Gridview,Arraylist,我试图显示从url读取的图像,它们不仅仅是图像,所以我必须将所有图像都放在arraylist中,然后使图像显示在gridview中,由于某些原因,它没有显示任何内容,gridview完全为空,请告知我做错了什么 BottomSheetDialog_Smiles.java Communicator.getInstance().on("subscribe start", new Emitter.Listener() { @Override public void c
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);
在适配器中使用毕加索显示图像
@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);
Picasso.with(getApplicationContext()).load(list.get(position).getEmojiUrl()).into(imageView);
return v;
}
}
显然,这行代码行不通:
imageView.setImageResource(Integer.parseInt((list.get(position)).urlFile));
相反,只需使用glide或piccaso加载图片即可。
首先将此行添加到gradle文件:
implementation 'com.github.bumptech.glide:glide:4.5.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.5.0'
然后,不要写在上面,只需写:
Glide.with(context).load(list.get(position)).urlFile.into(imageView)
皮卡索图书馆也是一样的
还可以通过以下方式更改适配器:
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;
}
}
公共类EmojiAdapter扩展BaseAdapter{
语境;
ArrayList=新建ArrayList();
公共EmojiAdapter(上下文,数组列表){
super(上下文、R.layout.smiles\u项目\u布局、列表);
this.context=上下文;
this.list=列表;
}
@非空
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
平放机=
(LayoutFlater)context.getSystemService(context.LAYOUT\u充气机\u服务);
视图v=o.充气(R.布局.礼物/布局2,父级,假);
ImageView ImageView=(ImageView)v.findViewById(R.id.smile\u image\u view);
setImageResource(Integer.parseInt((list.get(position)).urlFile));
返回v;
}
@凌驾
public int getCount(){
返回list.size();
}
@凌驾
公共对象getItem(int位置){
返回null;
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
}
这完全有道理,但是由于某些原因,它仍然没有显示任何图像。我已经更新了代码,我猜您需要查看的所有代码都以这种方式更改了这一行:Picasso.with(getApplicationContext()).load(emojiUrl).into(yourImageView);您应该在适配器中使用该行。而不是imageView.setImageResource(Integer.parseInt((list.get(position)).urlFile));是的,我在适配器中将其更改为Picasso.with(getApplicationContext()).load(list.get(position.getEmojiFile()).into(imageView);但仍然不起作用我已经尝试了上面的代码,但仍然没有显示任何图像扫描您与我共享该图像url?这些图像仍然在本地服务器上,但如果您愿意,可以在任何url上进行解释
implementation 'com.github.bumptech.glide:glide:4.5.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.5.0'
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;
}
}