我在Parse.com上的表格中存储了三张图片,我想使用他们的网址显示这三张图片。
我检索了三张图片的网址,它们显示在RecyclerView中。您可以在我的屏幕截图中看到这一点。
那么如何使用他们的URL显示这三个图像?
我的主要活动:
public class RecyclerViewActivity extends Activity {
private List<Person> persons;
private RecyclerView rv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.recyclerview_activity);
rv=(RecyclerView)findViewById(R.id.rv);
LinearLayoutManager llm = new LinearLayoutManager(this);
rv.setLayoutManager(llm);
rv.setHasFixedSize(true);
initializeData();
initializeAdapter();
}
private void initializeData(){
persons = new ArrayList<>();
//Query to load String data into the card view/recycler view
ParseQuery<ParseObject> query = ParseQuery.getQuery("events");
query.findInBackground(new FindCallback<ParseObject>() {
@Override
public void done(List<ParseObject> objects, ParseException e) {
if (e == null) {
for (int i = 0; i < objects.size(); i++) {
persons.add(new Person(objects.get(i).getString("name"), objects.get(i).getString("shortinfo"), objects.get(i).getParseFile("image"), img[i]));
}
} else {
// something went wrong
}
initializeAdapter();
}
});
}
private void initializeAdapter(){
RVAdapter adapter = new RVAdapter(persons);
rv.setAdapter(adapter);
}
}
MY ADAPTER:
public class RVAdapter extends RecyclerView.Adapter<RVAdapter.PersonViewHolder> {
public static class PersonViewHolder extends RecyclerView.ViewHolder {
CardView cv;
TextView personName;
TextView personAge;
ParseImageView personPhoto;
TextView personPhoto1;
PersonViewHolder(View itemView) {
super(itemView);
cv = (CardView)itemView.findViewById(R.id.cv);
personName = (TextView)itemView.findViewById(R.id.person_name);
personAge = (TextView)itemView.findViewById(R.id.person_age);
personPhoto = (ParseImageView)itemView.findViewById(R.id.person_photo);
personPhoto1 = (TextView)itemView.findViewById(R.id.person_photo1);
}
}
List<Person> persons;
RVAdapter(List<Person> persons){
this.persons = persons;
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
@Override
public PersonViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item, viewGroup, false);
PersonViewHolder pvh = new PersonViewHolder(v);
return pvh;
}
@Override
public void onBindViewHolder(PersonViewHolder personViewHolder, int i) {
personViewHolder.personName.setText(persons.get(i).name);
personViewHolder.personAge.setText(persons.get(i).age);
personViewHolder.personPhoto.setParseFile(persons.get(0).photoId);
personViewHolder.personPhoto1.setText(persons.get(i).photoId1);
//personViewHolder.personPhoto.setParseFile(persons.get(2).photoId);
}
@Override
public int getItemCount() {
return persons.size();
}
}
我的数据包含我的回收者视图数据:
class Person {
String name;
String age;
ParseFile photoId;
String photoId1;
Person(String name, String age, ParseFile photoId,String photoId1) {
this.name = name;
this.age = age;
this.photoId = photoId;
this.photoId1 = photoId1;
}
}
答案 0 :(得分:3)
我会告诉你一个例子。这个例子将依赖于使用Picasso(Glide也可以!)因为您可能需要为大量图像执行此操作,并且使用Picasso可以节省时间。
首先,通过Gradle添加picasso:
compile 'com.squareup.picasso:picasso:2.5.2'
其次,对单个图像执行以下示例:
ParseFile image = persons.get(i).getParseFile("imageName");
Uri imageUri = Uri.parse(image.getUrl());
Picasso.with(context).load(uri.toString()).into(imageView);
请注意这是多么容易,并且由于您正在保存Parse,因此请使用适当的命名(即image_01234.jpg)保存文件,其中结束位是时间戳或您拥有的内容。
答案 1 :(得分:1)
我建议您使用像Picasso,Glide,Fresco,ImageRequest(Volley)这样的库,它具有许多功能,可以帮助您完成此任务。
properties
您应该使用imageView
Picasso.with(context).load("http://www.tecnologia.net/wp-content/uploads/2015/05/Los-mejores-trucos-para-Android.png").into(yourImageView);
Glide.with(context).load("http://www.tecnologia.net/wp-content/uploads/2015/05/Los-mejores-trucos-para-Android.png").into(yourImageView);
您的适配器
Glide.with(context).load("your_link_from_parse").into(yourImageView);
不要忘记在您的proyect中导入库。
查看此链接http://inthecheesefactory.com/blog/get-to-know-glide-recommended-by-google/en