如何将图像加载到不在活动布局中的 imageView？

Question

I am Making an Background app and want to load the images when the first page is running but i need to load the image into ImageView in another activity which is not active(Maybe it is not possible i don't know). This maybe seem a silly question to some of u but tried to solve it for like 2 days and I cant figure it out. So i thought i should ask here. I also Tried to find the answer on the internet but i couldn't find the answer on the internet. If this not possible then please send suggestions if you have any about what should i do. Thanks For Reading And Thinking about it.

Answer 1

I'm not sure if I understand you right, but it looks like you simply need to pass image uri by Intent or other way, get it inside onResume() and then just display it. I don't see any point in loading image into ImageView which isn't visible on the screen.

Of course if you need to load image from background thread into ImageView which is visible you can use

runOnUiThread(new Runnable() {
    public void run() {
        // here you load image
    }
});

Answer 2

I am assuming that, you are trying load image into inactive imageview to achieve faster loading of image. You can use Picasso to cache image before loading it, so when you need the image you'll have it on cache.

Singleton picasso instance

Picasso picasso =  new Picasso.Builder(context).memoryCache(new LruCache(context)).build();

preload the image

 picasso.load("https://image..").fetch();

load the image into imageview

ImageView target = findViewById(..);
picasso.load("https://image..").into(target);