Basic learning of frame animation of Android animation

preface

In Android, there are two ways to implement Animation: tween animation and frame animation. Gradient animation produces animation effects by constantly making image transformations (translation, scaling, rotation, etc.) on the objects in the scene. Frame animation is to play the prepared images in sequence to produce animation effects, similar to movies.

Let's learn the basic knowledge of frame by frame animation in Android.

Principle: visual persistence of human eyes

Method:

1. In Java code (New animationdrawable(). Addframe (getdrawable (r.drawable. A), 200);)

SDK seems to require that the minimum version must be > = 21

2. Define animation resources in XML file

The renderings are as follows

code

1. Prepare picture resources

Put the picture resources in the drawable hdpi directory

2. Create an animation list file in the drawable directory

anim_ frame. xml

3. In the layout file, add ImageView and set its background attribute to the animation resource XML

activity_ main. xml

4. In Java, get the animation resources, call start() to start the animation, and stop() to stop the animation

summary

The above is the whole content of this article. I hope it can be helpful to Android developers. If you have any questions, you can leave a message.