Android图片缩放

Question

I always have problems when using images. I want to use an image as splash screen. So I imported all resolutions (ldpi to xxhdpi) of my image using Multisource-Drawable in Android Studio. Then, I created a imageview in my Activity and set Width and Height to 150dp both. It seems to use the ldpi resource and the image get very blurry.

What's the best way to import images in Android Studio to general use?

[UPDATE]

Android is chosing the right size, but not how I want. I fixed it by adding a 512x512 png file and then setting its Width And Height to 150dp

Answer 1

I think your question may have two separate answers. First, you are assuming that an image is the best way to set up a splash screen. This is not so, as the content would have to be called after the app has already finished setting up. That would mean your user sees a flash (or more) of a blank screen before the splash screen is shown. Second, you would like to know the best way to import images into Android Studio. Here are the two different answers:

#1 The best way to implement a splash screen is to have a theme called on a blank activity. The theme would include your desired image and background color. The reason for this is to eliminate the short break before content is called. Click here for a link describing more and giving a tutorial.

#2 In my opinion, the simplest and most robust way to add an image resource is to use the Image Asset import feature. Follow these steps:

1. Right click on " res " (in the Project View) -> New -> Image Asset
2. On Icon Type choose Action Bar and Tab Icons
3. For Asset Type choose Image
4. Choose the image path (on your computer)
5. Give your image a name (no UPPERCASE, only lowercase and underscores, etc)
6. Next -> Finish

Answer 2

使图像视图的高度和宽度wrap_content并将其重力设置为中心。