picasso | 易学教程

Xamarin导入第三方jar包(aar包)

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导入第三方jar包(aar包一样) 在一些功能上我们可以需要用到第三方依赖包，才能实现功能，不可能自己从头开始写。就从安卓来说，它们的依赖包是 jar 格式的，这些都是 JAVA 源码编译过来的，我们的 Xamarin 插件确实基于 C# 开发的，怎么将这些 jar 包引用呢？aar包也可以参考这篇博客。这里官方给出了解决方法，分三步走：第一步新建依赖包项目新建一个Java Bingdings Library，注意的是这里命名规范一定要大写开头。第二步管理Jar包在Jars文件中，添加你需要的 jar 包这里需要注意的是，如果你导入的 jar 包，依赖其他的 jar 包，那么需要你把该 jar 包中的所有依赖包一起添加进来，不然会编译报错，这里拿 picasso-2.x.x.jar 包做演示。导入Jar包在Jars，右击，添加现有项，选择你需要添加的 jar 包，你也可以直接把 jar 包，拖入到这个文件中。设置Jar包编译 jar 很容易，只需要一个操作就是更改该 jar 包的属性。点击需要编译的 jar 包，在下发有个 Build Action 属性，将它设置为下方图的值。编译Jar包最后只需要在依赖项目中，右击选择生成，如果没有报错，那么恭喜你编译成功，如果报错了，那么请检查依赖版本是否和你开发版本一直，如下图：第三步添加依赖

Android + Picasso: changing URL cache expiration

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I am using Picasso to download and display images in views all accros my application. Those images are changing very rarely (they are considered valid for a few months). Is there a simple way to ask Picasso (or the underlying okHttp) to keep those images on disc for this much time? Disk caching happens "below" Picasso inside the HTTP client. In fact, this process is completely transparent. We never explicitly ask for a cached-version or an internet-version, the HTTP client will make the decision internally and do the right thing. Because we opted to leverage the HTTP client for caching, we're

Doesn't Picasso support to download images which uses https protocol

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Hello I am using the Picasso library to download the images from URL. URL : https://fbcdn-profile-a.akamaihd.net/hprofile-ak-prn2/t1.0-1/s200x200/1472865_191408954385576_14109897_n.jpg URL is using https protocol, here it is not working for me to download the images of https protocol using Picasso . Doesn't it support to download the images which uses https protocol, it worked for me only if I use http proctocol ? Here I am trying to get bitmap which is using https protocol com.squareup.picasso.Target target = new com.squareup.picasso.Target() { @Override public void onBitmapLoaded(Bitmap

Picasso image load callback

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问题 I want to use Picasso to load three consecutive images one on top of each other in a listview. Using the methods Picasso provides makes this easy. However because these images are loading in at different times it causes a flickering effect as the images come in. For example sometimes image 2 appears before image 1, and when image 1 loads it causes an unnatural stutter. It would be better if I could set the listview's visibility to invisible until all the images are available to be shown.

Appcompat CardView and Picasso no rounded Corners

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问题 I do not know where Exactly i Should Adress this issue, if it is my fault, there is something in the Picasso Lib Wrong or in the Cardview Library. Basicly i have a CardView containing an image (Full Card Covered) and A TextView overlaying. When Running the Code on a Android 5.0 Device, everything works fine and the Image Gets its Rounded Corners . However if i run it on a pre 5.0 device, the image overlaps the Cardlayout and does not have rounded Corners. You can See a Comparison on this

Android Picasso Configure LruCache Size

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问题 I am using the trending Picasso in my Project, but I have dumped the heap and it looks like this. Now yesterday it gives me 48M for LruCache used in Picasso. How could I specify the size of it? Note: my loaded images are apparently large. If someone came up with fit() or centerCrop() , I've read that those functions reduce image size, right? But sometimes I have to display small images in the ListView in full view. Now, do those functions cache a scaled down image? 回答1: By default, Picasso

Recyclerview painfully slow to load cached images form Picasso

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I have implemented a RecyclerView that contains mainly images which is loading in through Picasso. My problem is that as soon as I scroll down or up the view, the placeholder image appears for approx. a second before it is replaced by the actual image. It scrolls very smoothly, but is practically unusable. This happens every time something scrolls off the screen. Picasso is clearly caching the images to the disk, as they load faster than the initial load time, but they are definitely instantly reloading from the cache. What did i implement incorrectly? My adapter code: public class

Picasso IllegalArgumentException Target must not be null

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I'm trying to set image by using Picasso library on my project. When I click image of the View,I'm getting an error on Picasso execution. Logcat of the app java.lang.IllegalArgumentException: Target must not be null. at com.squareup.picasso.RequestCreator.into(RequestCreator.java:340) at com.squareup.picasso.RequestCreator.into(RequestCreator.java:326) at com.zafer.celaloglu.FragmentsandActivities.UnfoldableDetailsFragment.openDetails(UnfoldableDetailsFragment.java:89) at com.zafer.celaloglu.model.PaintingsAdapter.onClick(PaintingsAdapter.java:52) at android.view.View.performClick(View.java

Create “loading” animation easily

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问题 I have an android listView with an image in each item. It takes a while till the image is loaded. How can I add a "loading" animation every time the image is loaded? Should I use a .gif ? Or create my own animation and stop it on onPostExecute() ? How can I do this if I use "picasso" because there all the async task is black box to the developer and I cannot stop any animation? 回答1: Use following code: MainActivity.java @Override protected void onCreate(Bundle savedInstanceState) { super

Loading Image using picasso inside AsyncTask

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问题 I'm using picasso to load an image as a background for my activity, I want to use an AsyncTask, while the image is loading, when done the progress bar dismisses to give better appearance to my application, Here is my code : private class RemoteDataTask extends AsyncTask<Void, Void, Void> { @Override protected void onPreExecute() { super.onPreExecute(); mProgressDialog = new ProgressDialog(MainActivity.this); mProgressDialog.setMessage("Chargement..."); mProgressDialog.setIndeterminate(false);