Animation use & mdash; View Animation, Animation viewanimation

Animation use-View Animation, Animation viewanimation

View Animation defines the following four Animation effects:

Scale, translation, rotation, and alpha)

 

Scaling Animation:

ScaleAnimation(float fromX, float toX, float fromY, float toY, float pivotX, float pivotY)

See the constructor of ScaleAnimation. The meaning of each parameter is clear.

FromX: The width before scaling the object.

ToX: The size of object x to be scaled

The other two parameters with Y are similar.

 

Displacement Animation:

TranslateAnimation(float fromXDelta, float toXDelta, float fromYDelta, float toYDelta)

FromXDelte: X coordinate before the object executes the animation

ToXDelte: The x coordinate of the moving target when the object is stopped.

 

Rotation Animation:

RotateAnimation(float fromDegrees, float toDegrees, float pivotX, float pivotY)

FromDegrees: angle before Rotation

ToDegrees: How many degrees the object should be rotated

The last two parameters are used to control the rotation center.

 

Transparent Animation:

AlphaAnimation(float fromAlpha, float toAlpha)

The values of the two parameters can only be between 0 and 1, 0 is completely transparent, 1 and not transparent

 

Instance code:

Package com. whathecode. viewanimation; import android. OS. bundle; import android. support. v7.app. actionBarActivity; import android. view. view; import android. view. animation. alphaAnimation; import android. view. animation. animationSet; import android. view. animation. cycleInterpolator; import android. view. animation. rotateAnimation; import android. view. animation. scaleAnimation; import android. view. animation. translateAnimation; import android. widget. imageView; public class MainActivity extends ActionBarActivity {@ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main);} public void onclickMove (View view) {ImageView img = (ImageView) findViewById (R. id. image); TranslateAnimation ta = new TranslateAnimation (0, 10, 0, 0); ta. setInterpolator (new CycleInterpolator (7f); ta. setDuration (1, 1000); img. startAnimation (ta);} public void onclickScale (View view) {ImageView img = (ImageView) findViewById (R. id. image);/*** set the zooming center value */int zooming Tx = img. getWidth ()/2; int equalty = img. getHeight ()/2; // initialize the scaling object ScaleAnimation sa = new ScaleAnimation (1f, 0.5f, 1f, 0.5f, 0000tx, 0000ty); // set the interpolation device, it is used to control the animation behavior. Here, it controls the number of animation repetitions 3 sa. setInterpolator (new CycleInterpolator (3f); // The animation speed sa. setDuration (1, 1500); img. startAnimation (sa);} public void onclickRotate (View view) {ImageView img = (ImageView) findViewById (R. id. image); int destination Tx = img. getWidth ()/2; int equalty = img. getHeight ()/2; RotateAnimation ra = new RotateAnimation (0, 360f, 0000tx, 0000ty); ra. setDuration (1, 1000); img. startAnimation (ra);} public void onclickAlpha (View view) {ImageView img = (ImageView) findViewById (R. id. image); AlphaAnimation aa = new AlphaAnimation (1f, 0.5f); aa. setDuration (1, 1500); img. startAnimation (aa);} public void startAnimSet (View view) {ImageView img = (ImageView) findViewById (R. id. image); int destination Tx = img. getWidth ()/2; int equalty = img. getHeight ()/2; RotateAnimation ra = new RotateAnimation (0, 360f, 0000tx, 0000ty); ra. setDuration (1000); AlphaAnimation aa = new AlphaAnimation (1f, 0.5f); aa. setDuration (1500); // Initialize an empty animation set AnimationSet as = new AnimationSet (false); // Add an animation as to the set. addAnimation (ra);. addAnimation (aa); img. startAnimation ();}}

Effect:

<? Xml version = "1.0" encoding = "UTF-8"?> <Set xmlns: android = "http://schemas.android.com/apk/res/android" android: interpolator = "@ [package:] anim/interpolator_resource" android: extends interpolator = ["true" | "false"]> <alpha android: fromAlpha = "float" android: toAlpha = "float"/> <scale android: fromXScale = "float" android: toXScale = "float" android: fromYScale = "float" android: toYScale = "float" android: paitx = "float" android: required ty = "float"/> <translate android: fromXDelta = "float" android: toXDelta = "float" android: fromYDelta = "float" android: toYDelta = "float"/> <rotate android: fromDegrees = "float" android: toDegrees = "float" android: effectx = "float" android: ty = "float"/> <set>... </set>

Instance code:

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"    android:shareInterpolator="false">    <translate         android:fromXDelta="0"        android:toXDelta="200"        android:duration="1500"/>        <alpha         android:fromAlpha="1"        android:toAlpha="0.5"        android:duration="1500"        /></set>

How to load resources:

Public void loadAnimRes (View view) {// use the loadAnimationUtils class to load the animation resource AnimationSet as = (AnimationSet) AnimationUtils. loadAnimation (this, R. anim. animset); img. startAnimation ();}

Effect: