Picasso开源图片加载利器使用初探

Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);

Picasso.with(context).load(url).into(view);

Picasso.with(context).load(url) .resize(50,50).centerCrop().into(imageView)

//这里的placeholder将resource传入通过getResource.getDrawable取资源，所以可以是张图片也可以是color id

Picasso.with(context).load(url).placeholder(R.drawable.user_placeholder).error(R.drawable.user_placeholder_error).into(imageView);

Picasso.with(context).load(R.drawable.landing_screen).into(imageView1);

Picasso.with(context).load("file:///android_asset/DvpvklR.png").into(imageView2);

Picasso.with(context).load(new File(...)).into(imageView3);

//这里显示notification的图片

Picasso.with(activity).load(Data.URLS[new Random().nextInt(Data.URLS.length)]).resizeDimen(R.dimen.notification_icon_width_height,? ?R.dimen.notification_icon_width_height).into(remoteViews,R.id.photo,NOTIFICATION_ID,notification);

//这里是通过设置tag标签，就是当前传过来的context，这样就可以根据这个context tag来pause和resume显示了

Picasso.with(context).load(url).placeholder(R.drawable.placeholder).error(R.drawable.error).fit().tag(context).into(view);

//监听onScrollStateChanged的时候调用执行

picasso.resumeTag(context);

picasso.pauseTag(context);

Picasso.with(context).load(contactUri).placeholder(R.drawable.contact_picture_placeholder).tag(context).into(holder.icon);

@Override protected void onPause() {

? ? super.onPause();

? ? if (isFinishing()) {

? ? ? // Always cancel the request here,this is safe to call even if the image has been loaded.

? ? ? // This ensures that the anonymous callback we have does not prevent the activity from

? ? ? // being garbage collected. It also prevents our callback from getting invoked even after the

? ? ? // activity has finished.

? ? ? Picasso.with(this).cancelRequest(imageView);

? ? }

? }

// Trigger the download of the URL asynchronously into the image view.

? ? Picasso.with(context)

? ? ? ? .load(url)

? ? ? ? .placeholder(R.drawable.placeholder)

? ? ? ? .error(R.drawable.error)

? ? ? ? .resizeDimen(R.dimen.list_detail_image_size,R.dimen.list_detail_image_size)

? ? ? ? .centerInside()

? ? ? ? .tag(context)

? ? ? ? .into(holder.image);