毕加索没有显示图像(Picasso not showing images)

我有一个应用程序从内部存储中获取图像，并且必须在ImageView中显示它们。由于图像的加载会对应用程序的性能产生影响，因此我想异步进行。我提出了这个问题，并被告知使用毕加索。该应用程序现在很快，但没有显示图像。这是我用来将图像放入ImageView的代码：

Picasso.with(c).load(path).resize(dpToPx(80), dpToPx(80)).centerCrop().into(holder.foto);

这是适配器，我使用的注释行没有Picasso。这样，显示了图像，但它延迟了UI：

public class FotoAdapter extends BaseAdapter { private ArrayList<BeanFotos> fotos; private LayoutInflater inflater=null; Context c; Handler handler; public FotoAdapter(Context c, ArrayList<BeanFotos> fotos){ this.fotos=fotos; inflater=LayoutInflater.from(c); this.c=c; } @Override public int getCount() { if(fotos!=null){ return fotos.size(); } return 0; } @Override public Object getItem(int position) { return fotos.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { convertView=inflater.inflate(R.layout.foto_layout, null); holder=new ViewHolder(); holder.lat=(TextView)convertView.findViewById(R.id.textlat); holder.lon=(TextView)convertView.findViewById(R.id.textlon); holder.foto=(ImageView)convertView.findViewById(R.id.foto); convertView.setTag(holder); }else{ holder = (ViewHolder) convertView.getTag(); } String path=fotos.get(position).getFotoPath(); Picasso.with(c).load(path).resize(dpToPx(80), dpToPx(80)).centerCrop().into(holder.foto); /*Bitmap foto= BitmapFactory.decodeFile(path); int bmWidth=foto.getHeight(); int bmHeight=foto.getHeight(); int ivWidth; int ivHeigth; int new_width; int new_height; ivWidth=dpToPx(80); new_width=ivWidth; new_height = (int) Math.floor((double) bmHeight *( (double) new_width / (double) bmWidth)); Bitmap newbitMap = Bitmap.createScaledBitmap(foto, new_width, new_height, true);*/ holder.lat.setText(fotos.get(position).getLatitud().toString()); holder.lon.setText(fotos.get(position).getLongitud().toString()); //holder.foto.setImageBitmap(newbitMap); return convertView; } private int dpToPx(int dp) { float density = c.getResources().getDisplayMetrics().density; return Math.round((float)dp * density); } static class ViewHolder { public TextView lat; public TextView lon; public ImageView foto; } }

使用毕加索和展示图像会很棒，但如果不可能，我该怎么办？

谢谢。

I have an app that gets images from internal storage, and must show them in an ImageView. Since the loading of the images has an impact in performance in the app, I would like to do it asynchronously. I made this question, and was told to use Picasso. The app now goes fast, but is not showing the image. This is the code I am using to put the image in the ImageView:

Picasso.with(c).load(path).resize(dpToPx(80), dpToPx(80)).centerCrop().into(holder.foto);

This is the adapter, with the commented lines I used without Picasso. That way, the Image is shown, but it delays the UI:

public class FotoAdapter extends BaseAdapter { private ArrayList<BeanFotos> fotos; private LayoutInflater inflater=null; Context c; Handler handler; public FotoAdapter(Context c, ArrayList<BeanFotos> fotos){ this.fotos=fotos; inflater=LayoutInflater.from(c); this.c=c; } @Override public int getCount() { if(fotos!=null){ return fotos.size(); } return 0; } @Override public Object getItem(int position) { return fotos.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { convertView=inflater.inflate(R.layout.foto_layout, null); holder=new ViewHolder(); holder.lat=(TextView)convertView.findViewById(R.id.textlat); holder.lon=(TextView)convertView.findViewById(R.id.textlon); holder.foto=(ImageView)convertView.findViewById(R.id.foto); convertView.setTag(holder); }else{ holder = (ViewHolder) convertView.getTag(); } String path=fotos.get(position).getFotoPath(); Picasso.with(c).load(path).resize(dpToPx(80), dpToPx(80)).centerCrop().into(holder.foto); /*Bitmap foto= BitmapFactory.decodeFile(path); int bmWidth=foto.getHeight(); int bmHeight=foto.getHeight(); int ivWidth; int ivHeigth; int new_width; int new_height; ivWidth=dpToPx(80); new_width=ivWidth; new_height = (int) Math.floor((double) bmHeight *( (double) new_width / (double) bmWidth)); Bitmap newbitMap = Bitmap.createScaledBitmap(foto, new_width, new_height, true);*/ holder.lat.setText(fotos.get(position).getLatitud().toString()); holder.lon.setText(fotos.get(position).getLongitud().toString()); //holder.foto.setImageBitmap(newbitMap); return convertView; } private int dpToPx(int dp) { float density = c.getResources().getDisplayMetrics().density; return Math.round((float)dp * density); } static class ViewHolder { public TextView lat; public TextView lon; public ImageView foto; } }

Would be great to use Picasso and show the Image, but if that is not possible, what could I do?

Thank you.