問題與問題標題中說明的一樣。實際上,我想將我的記錄中已有url的圖像加載到RecyclerView
中,並同時將下載的圖像保存到數據庫中。我使用realm.io
和Glide
和我RecyclerViewAdapter
是如下:LazyImage加載到RecyclerView +將LoadedImages保存到數據庫中
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
final ProductModel obj = getData().get(position);
holder.data = obj;
holder.title.setText(obj.getTitle());
if (obj.getImage() == null) {
Glide
.with(context)
.load(obj.getImageUrl())
.fitCenter()
.placeholder(R.drawable.bronteel_logo)
.into(new GlideDrawableImageViewTarget(holder.icon) {
@Override
protected void setResource(GlideDrawable resource) {
// this.getView().setImageDrawable(resource); is about to be called
super.setResource(resource);
// here you can be sure it's already set
((ProductsFragment) mFragment).saveImage(obj, resource);
}
});
} else {
byte[] data = obj.getImage();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inMutable = true;
Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length, options);
holder.icon.setImageBitmap(bmp);
}
}
class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView title;
public ImageView icon;
public ProductModel data;
public MyViewHolder(View view) {
super(view);
title = (TextView) view.findViewById(R.id.textView);
icon = (ImageView) view.findViewById(R.id.imageView);
view.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (data.getImage() != null)
activity.startActivity(new Intent(activity, ProductActivity.class).putExtra("id", data.getId()));
}
}
這裏就是我如何保存圖像:
public void saveImage(final ProductModel data, Drawable drw) {
new AsyncImagePersister(data).execute(drw);
}
private class AsyncImagePersister extends AsyncTask<Drawable, Void, byte[]> {
private final ProductModel data;
AsyncImagePersister(ProductModel data) {
this.data = data;
}
@Override
protected byte[] doInBackground(Drawable... drawables) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
Bitmap bmp = drawableToBitmap(drawables[0]);
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
return stream.toByteArray();
}
@Override
protected void onPostExecute(final byte[] bytes) {
super.onPostExecute(bytes);
realm.executeTransaction(new Realm.Transaction() {
@Override
public void execute(Realm realm) {
data.setImage(bytes);
}
});
}
public Bitmap drawableToBitmap (Drawable drawable) {
Bitmap bitmap = null;
if (drawable instanceof BitmapDrawable) {
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
if(bitmapDrawable.getBitmap() != null) {
return bitmapDrawable.getBitmap();
}
}
if(drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
} else {
bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
}
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
}
然而,從互聯網加載首次圖像時(使用滑翔)它顯示不同地方的錯誤照片,另一方面在取出所有圖像後,保存的圖像到達正確的位置。
那麼我做錯了什麼?請幫忙。謝謝。
我需要將它們保存在數據庫中,因爲我需要在應用程序的其他部分離線加載它們。所以我不能依靠捕捉。如果您有任何想法,我該如何做,我會感謝您的幫助。否則,我知道捕捉選項。 –