Android learning notes-java Implementation of tween animation

Android learning notes-java Implementation of tween animation
Android animations are divided into Tween animations and Frame animations. I recently learned about body tween animations. Now I will introduce my learning experiences and related knowledge as follows. Tween, also known as a compensation animation, allows you to zoom in, zoom in, rotate, or gradient objects. First, Tween animation has four main implementation classes: 1. AlphaAnimation: gradient (color) animation, which mainly controls transparency change animation. It is often constructed using AlphaAnimation (float fromAlpha, float toAlpha). fromAlpha: transparency at the beginning of the animation (value range: 0.0 to 1.0); toAlpha: transparency at the end of the animation; 2. ScaleAnimation: mainly controls the size change, often using ScaleAnimation (float fromX, float toX, float fromY, float toY, int should txtype, float should txvalue, int should tytype, float should tyvalue) to construct; fromX: scaling scale at the animation start X coordinate (relative to the size of the original image); toX: Scaling scale at the animation end X coordinate; fromY: scaling at the animation start Y coordinate ToY: The scaling scale on the Y coordinate of the Animation end; the scaling mode (type) on the X coordinate. The values are Animation. ABSOLUTE, Animation. RELATIVE_TO_SELF: relative to itself, Animation. RELATIVE_TO_PARENT; pivotXValue: the center position of the scaling on X coordinate; configurtytype: Scaling mode on Y coordinate. The values include Animation. ABSOLUTE, Animation. RELATIVE_TO_SELF, Animation. RELATIVE_TO_PARENT; equaltyvalue: Center Position of scaling on Y coordinate; 3. TranslateAnimation: Mainly used to control animation implementation class of position transformation. It is often used to translate eanimation (float fromXDelta, float toXDelta, float fromYDelta, Float toYDelta) to construct; fromXDelta: X coordinate of the animation start; toXDelta: X coordinate of the animation end; fromYDelta: Y coordinate of the animation start; toYDelta: Y coordinate of the animation end; 4. Rotate: mainly controls the animation implementation class of rotation. It is often constructed using RotateAnimation (float fromDegrees, float toDegrees, int rotate txtype, float rotate txvalue, int rotate tytype, float rotate tyvalue); fromDegrees: rotation start angle; toDegrees: rotation end angle; pivotXType, pivotXValue, pivotYType, and pivotYValue are similar to scaling animation ScaleAnimation; Second: included shared methods // set playing time animatio N. setDuration (2000); // set the number of repeat times, remembering the number of repeat animation. setRepeatCount (2); // set the duplicate mode. There are two RESTART Methods: re-start and REVERSE: Start animation in REVERSE order. setRepeatMode (AlphaAnimation. REVERSE); // start playback iv. startAnimation (animation); 3: instance, layout file we write like this, <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" xmlns: tools = "http://schemas.android.com/tools" android: layout_width = "match_parent" android: layout_height = "match_par Ent "android: orientation =" vertical "android: paddingBottom =" @ dimen/activity_vertical_margin "android: paddingLeft =" @ dimen/activity_horizontal_margin "android: paddingRight = "@ dimen/activity_horizontal_margin" android: paddingTop = "@ dimen/activity_vertical_margin" tools: context = "com. ftf. tween. mainActivity "> <LinearLayout android: layout_width =" fill_parent "android: layout_height =" wrap_content "android: ori Entation = "horizontal"> <Button android: onClick = "click" android: text = "Transparency" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: orientation = "horizontal"/> <Button android: onClick = "click2" android: text = "zoom" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: orientation = "horizontal"/> <Button android: onClick = "click3" android: text = "Rotate" andro Id: layout_width = "wrap_content" android: layout_height = "wrap_content" android: orientation = "horizontal"/> <Button android: onClick = "click4" android: text = "Translation" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: orientation = "horizontal"/> <Button android: onClick = "click5" android: text = "Combination" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: orie Ntation = "horizontal"/> </LinearLayout> <LinearLayout android: layout_width = "match_parent" android: layout_height = "match_parent" android: gravity = "center"> <ImageView android: id = "@ + id/iv" android: src = "@ drawable/ic_launcher" android: layout_width = "wrap_content" android: layout_height = "wrap_content"/> </LinearLayout> in the activity, write: // public void click (View view) {AlphaAnimation Animation = new AlphaAnimation (0.0f, 1.0f); animation. setDuration (2000); animation. setRepeatCount (2); animation. setRepeatMode (AlphaAnimation. REVERSE); iv. startAnimation (animation);} public void click2 (View view) {ScaleAnimation animation = new ScaleAnimation (0.2f, 2.0f, 0.2f, 2.0f, Animation. RELATIVE_TO_SELF, 0.5f, Animation. RELATIVE_TO_SELF, 0.5f); animation. setDuration (2000); animation. setRepe AtCount (2); animation. setRepeatMode (AlphaAnimation. REVERSE); iv. startAnimation (animation);} public void click3 (View view) {RotateAnimation animation = new RotateAnimation (0,360, Animation. RELATIVE_TO_SELF, 0.5f, Animation. RELATIVE_TO_SELF, 0.5f); animation. setDuration (2000); animation. setRepeatCount (2); animation. setRepeatMode (AlphaAnimation. REVERSE); iv. startAnimation (animation);} public void Click4 (View view) {TranslateAnimation animation = new TranslateAnimation (Animation. RELATIVE_TO_PARENT, 0.2f, Animation. RELATIVE_TO_PARENT, 1.0f, Animation. RELATIVE_TO_PARENT, 0.2f, Animation. RELATIVE_TO_PARENT, 1.0f); animation. setDuration (2000); animation. setRepeatCount (2); animation. setRepeatMode (AlphaAnimation. REVERSE); iv. startAnimation (animation);} public void click5 (View view) {// set the Mixed Mode, That is, put multiple playback effects together. AnimationSet set = new AnimationSet (false); TranslateAnimation pa = new TranslateAnimation (Animation. RELATIVE_TO_PARENT, 0.2f, Animation. RELATIVE_TO_PARENT, 1.0f, Animation. RELATIVE_TO_PARENT, 0.2f, Animation. RELATIVE_TO_PARENT, 1.0f); pa. setDuration (1, 2000); pa. setRepeatCount (2); pa. setRepeatMode (AlphaAnimation. REVERSE); RotateAnimation ra = new RotateAnimation (0,360, Animation. RELATIVE_TO_SELF, 0.5f, Animation. RELATIVE_TO_SELF, 0.5f); ra. setDuration (1, 2000); ra. setRepeatCount (2); ra. setRepeatMode (AlphaAnimation. REVERSE); ScaleAnimation sa = new ScaleAnimation (0.2f, 2.0f, 0.2f, 2.0f, Animation. RELATIVE_TO_SELF, 0.5f, Animation. RELATIVE_TO_SELF, 0.5f); sa. setDuration (1, 2000); sa. setRepeatCount (2); sa. setRepeatMode (AlphaAnimation. REVERSE); set. addAnimation (sa); set. addAnimation (ra); set. addAnimation (pa); iv. startAnimation (set );}