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Animations

Animations. Animation Category . Tweened Animations Scale animations Rotate animations Alpha animations Translate animations Frame-by-Frame Animations. Procedure to create Tweened Animations. Create an object of AnimationSet Create an object of Animation

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Animations

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  1. Animations Fall 2012 CS2302: Programming Principles

  2. Animation Category • Tweened Animations • Scale animations • Rotate animations • Alpha animations • Translate animations • Frame-by-Frame Animations Fall 2012 CS2302: Programming Principles

  3. Procedure to create Tweened Animations • Create an object of AnimationSet • Create an object of Animation • TranslateAnimation(intfromXType, float fromXValue, inttoXType, float toXValue, intfromYType, float fromYValue, inttoYType, float toYValue) • AlphaAnimation(float fromAlpha, float toAlpha) • ScaleAnimation(float fromX, float toX, float fromY, float toY, intpivotXType, float pivotXValue, intpivotYType, float pivotYValue) • RotateAnimation(float fromDegrees, float toDegrees, intpivotXType, float pivotXValue, intpivotYType, float pivotYValue) • Setting parameters for the object of Animation • Add the object of Animation to the object of AnimationSet • startAnimation(animationSet); Fall 2012 CS2302: Programming Principles

  4. Attributes of Animations Fall 2012 CS2302: Programming Principles

  5. Common Methods of Tweened Animations • setDuration(long durationMills) • set the amount of time (in milliseconds) for the animation to run • setFillAfter(booleanfillAfter) • If fillAfter is set to true, then the animation transformation is applied after the animation is over. • setFillBefore(booleanfillBefore) • If fillBeforeis set to true, then the animation transformation is applied before the animation has started. • setStartOffSet(long startOffset) • Set the delay in milliseconds before the animation runs. • setRepeatCount(intrepeatCount) • Defines how many times the animation should repeat. Fall 2012 CS2302: Programming Principles

  6. Create Tweened Animations by editing xml file • Create a folder called anim under res folder • Create new xml files in the anim folder. Add a set tag in the xml files: <set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator"> </set> • Add rotate, alpha, scale, or translate tag in the set tag. • Use AnimationUtils.loadAnimation to load the xml file, and then create an object of Animation • startAnimation Fall 2012 CS2302: Programming Principles

  7. Alpha Animation’s xml file <set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator"> <alpha android:fromAlpha="1.0" android:toAlpha="0.0" android:startOffset="500" android:duration="500" /> </set> Fall 2012 CS2302: Programming Principles

  8. Rotate Animation’s xml file <set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator"> <rotate android:fromDegrees="0" android:toDegrees="360" android:pivotX="50%" android:pivotY="50%" android:duration="5000" /> </set> Fall 2012 CS2302: Programming Principles

  9. Translate Animation’s xml file <set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator"> <translate android:fromXDelta="50%" android:toXDelta="100%" android:fromYDelta="0%" android:toYDelta="100%" android:duration="2000" /> </set> Fall 2012 CS2302: Programming Principles

  10. Scale Animation’s xml file <set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator"> <scale android:fromXScale="1.0" android:toXScale="0.0" android:fromYScale="1.0" android:toYScale="0.0" android:pivotX="50%" android:pivotY="50%" android:duration="2000" /> </set> Fall 2012 CS2302: Programming Principles

  11. Load xml file • In the MainActivity.java file • Animation animation = (Animation) AnimationUtils.loadAnimation(MainActivity.this, R.anim.translate); • imageView.startAnimation(animation); Fall 2012 CS2302: Programming Principles

  12. Frame-By-Frame Animations • Create a xml file under res/drawable <animation-listxmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="false"> <item android:drawable="@drawable/nv1" android:duration="500" /> <item android:drawable="@drawable/nv2" android:duration="500" /> <item android:drawable="@drawable/nv3" android:duration="500" /> <item android:drawable="@drawable/nv4" android:duration="500" /> </animation-list> Fall 2012 CS2302: Programming Principles

  13. Frame-By-Frame Animations • Load the xml file • imageView.setBackgroundResource(R.drawable.anim); • Get AnimationDrawable • AnimationDrawableanimationDrawable = (AnimationDrawable)imageView.getBackground(); • Start the animation • animatinDrawable.start(); Fall 2012 CS2302: Programming Principles

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