Question

Picasso和GridView存在问题。有一些网址，我希望应用程序获取它们并在GridView中显示它们。使用INTERNET permission和New Activity即可显示清单。

这是activity_gallery.xml：

<GridView xmlns:android='http://schemas.android.com/apk/res/android'
android:id="@+id/gridView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="90dp"
android:numColumns="auto_fit"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:stretchMode="columnWidth"
android:layout_gravity="center"
/>

这是我的GalleryActivity：

public class GalleryActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_gallery);

    GridView gridview = (GridView) findViewById(R.id.gridView);
    gridview.setAdapter(new ImageAdapter(this));

   }
}

而Adapter就是ImageAdapter：

public class ImageAdapter extends BaseAdapter {
private Context mContext;

public ImageAdapter(Context c) {
    mContext = c;
}

public int getCount() {
    return mThumbIds.length;
}

public Object getItem(int position) {
    return null;
}

public long getItemId(int position) {
    return 0;
}

public View getView(int position, View convertView, ViewGroup parent) {
    ImageView imageView;
    if (convertView == null) {
        imageView = new ImageView(mContext);
        imageView.setLayoutParams(new GridView.LayoutParams(200, 200));
    } else {
        imageView = (ImageView) convertView;
    }



    Log.i("milad", "Before");
    Picasso.with(mContext).load(mThumbIds[position]).centerCrop().into(imageView);
    Log.i("milad", "After");
    return imageView;

}

String[] mThumbIds  =
        {"http://30shahid.ir/Upload/pictures/gallery/2015/08/11/IMG_4995_e.jpg",
         "http://30shahid.ir/Upload/pictures/gallery/2015/08/11/IMG_502kkk7.jpg",
         "http://30shahid.ir/Upload/pictures/gallery/2015/08/11/IMG_49o74.jpg",
         "http://30shahid.ir/Upload/pictures/gallery/2015/08/11/13940515184958618_PhotoL.jpg",
        };
}

正如我的代码所提到的，我得到两个日志： Picasso.with(mContext).load(mThumbIds[0]).centerCrop().into(imageView);
我得到Before登录LOGCAT，但没有After日志。这意味着Picasso Line存在问题请帮助，谢谢。

Answer 1

我猜你最近在GridView中提交图像时遇到了问题我最近使用了通用图像加载器库

    private static class ImageAdapter extends BaseAdapter {
    private  final String[] IMAGE_URLS ;

    private LayoutInflater inflater;

    private DisplayImageOptions options;

    ImageAdapter(Context context,String source[]) {
        inflater = LayoutInflater.from(context);
        IMAGE_URLS=source;

        options = new DisplayImageOptions.Builder()
                .showImageOnLoading(R.mipmap.ico_place_holder)
                .showImageForEmptyUri(R.drawable.ic_empty)
                .showImageOnFail(R.drawable.ic_error)
                .cacheInMemory(true)
                .cacheOnDisk(true)
                .considerExifParams(true)
                .bitmapConfig(Bitmap.Config.RGB_565)
                .build();
    }



    @Override
    public int getCount() {
        return IMAGE_URLS.length;
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final ViewHolder holder;
        View view = convertView;
        if (view == null) {
            view = inflater.inflate(R.layout.item_grid_image, parent, false);
            holder = new ViewHolder();
            assert view != null;
            holder.imageView = (ImageView) view.findViewById(R.id.image);
            holder.progressBar = (ProgressBar) view.findViewById(R.id.progress);
            view.setTag(holder);
        } else {
            holder = (ViewHolder) view.getTag();
        }

        ImageLoader.getInstance()
                .displayImage(IMAGE_URLS[position], holder.imageView, options, new SimpleImageLoadingListener() {
                    @Override
                    public void onLoadingStarted(String imageUri, View view) {
                        holder.progressBar.setProgress(0);
                        holder.progressBar.setVisibility(View.VISIBLE);
                    }

                    @Override
                    public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
                        holder.progressBar.setVisibility(View.GONE);
                    }

                    @Override
                    public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
                        holder.progressBar.setVisibility(View.GONE);
                    }
                }, new ImageLoadingProgressListener() {
                    @Override
                    public void onProgressUpdate(String imageUri, View view, int current, int total) {
                        holder.progressBar.setProgress(Math.round(100.0f * current / total));
                    }
                });

        return view;
    }
}

static class ViewHolder {
    ImageView imageView;
    ProgressBar progressBar;
}

愿这对你有所帮助。享受编码。

Picasso和GridView的问题

1 个答案: