Loading and saving images into file on sd card

[ViHtarb]

How make loading and saving images into file?
I try use this method:

private Target target = new Target() {
    @Override
    public void onBitmapLoaded(final Bitmap bitmap, Picasso.LoadedFrom from) {
        File file = new File(Environment.getExternalStorageDirectory().getPath()  + "/saved.jpg");
        try {
            file.createNewFile();
            FileOutputStream ostream = new FileOutputStream(file);
            bitmap.compress(Bitmap.CompressFormat.JPEG,100,ostream);
            ostream.close();
         } catch (Exception e) {
            e.printStackTrace();
         }
    }

    @Override
    public void onBitmapFailed(Drawable errorDrawable) {}

    @Override
    public void onPrepareLoad(Drawable placeHolderDrawable) {}
};

@Override
public void onClick(View v) {
    Picasso.with(context).load("url").into(target);
}

On first click calling only onPrepareLoad method.
Method onBitmapLoaded calling only on second and more clicks.

I need to calling onBitmapLoaded method on first click.

PS. images for loading in HD size;
PSS. if loading smaller images all wonderful

[luccasmaso]

You can simplify and let the OkHttpDownloader from Picasso to handle caching images to disk. Picasso supports disk caching through it's HTTP client.

For example:

mBuilder = new Picasso.Builder(context) 
                  .loggingEnabled(BuildConfig.DEBUG) 
                  .indicatorsEnabled(BuildConfig.DEBUG) 
                  .downloader(new OkHttpDownloader(context, DISK_CACHE_SIZE)) 
                  .build();

mBuilder.load("url").into(target);

[LikeWather]

<uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_PHONE_STATE" />

have this???

[jzeferino]

@luccasmaso using the line new OkHttpDownloader(context, DISK_CACHE_SIZE) will cache all downloaded images to disk?

[luccasmaso]

As far as I know, yes.
https://square.github.io/picasso/2.x/picasso/com/squareup/picasso/OkHttpDownloader.html#OkHttpDownloader-java.io.File-long-

Read more about this in this stackoverflow answer: http://stackoverflow.com/a/23281195/255932

[altaf933]

I have implemented this function by a interface after downloaded successfully than it will callback into my class.

[JakeWharton]

This seems like a dupe of #506.