[Android] frame animation and gap animation

Display a picture frame by frame and connect it into animation

Create a xxx.xml file in the RES / drawable / directory

Add the < animation list > node and set whether to cycle Android: oneshot: "false"

Add an entry < item > node and set the resource Android: drawable = "@ drawable / xxx"

Set the execution time, Android: duration = "100"

Add corresponding pictures frame by frame

Get the ImageView object through findviewbyid()

Call setbackgroundresource() of ImageView object to set background resource. Parameter: resource file

Call the getbackground () method of the ImageView object to get the animationdrawable object

The getbackground () method is executed asynchronously in a separate thread. Therefore, sometimes the following code cannot be played. It is recommended to put it in the button click event or screen touch event

Call the animationdrawable object start() method to start playback

Tweet animation

transparency

Get alphaanimation object, new alphaanimation(), parameters: from 0.0F transparency to 1.0F transparency

Setduration() method of alphaanimation object to set the execution time

Call the startanimation () method of the view object. Parameter: alphaanimation object

zoom

Get scaleanimation object, new scaleanimation(), parameters:

Original width, width after change, original height, height after change, animation.relax_ TO_ Self, o.5f x centered, animation.relax_ TO_ Self, 0.5f y centered

Call the startanimation () method of the view object. Parameter: scaleanimation object

rotate

Get the rotateanimation object, new rotateanimation(), parameters:

Select from 0, rotate 360 degrees, and rotate the center animation.relax_ TO_ Self, o.5f x center, rotation center animation.relax_ TO_ Self, o.5f x centered

Call the startanimation () method of the view object. Parameter: rotateanimation object

translation

Get the translateanimation object, new translateanimation(), parameters:

Relative to parent form animation.relax_ TO_ PARENT，0.0f

Relative to parent form animation.relax_ TO_ PARENT，1.0f

Relative to parent form animation.relax_ TO_ PARENT， 0.0f

Relative to parent form animation.relax_ TO_ PARENT， 1.0f

Call the startanimation () method of the view object. Parameter: translateanimation object

Composite animation

Get the animationset object and new it

Get multiple animation objects above

Call the addanimation () method of the animationset object to add the animation. Parameter: Animation

Just add it many times

Call the startanimation () method of the view object. Parameters: animationset object