Transparency gradients, rotate animations, zoom animations, comment animations for Android animations

This is one of the little things I did when I was learning Android. The rotation, panning, zooming, and transparency of the image can be achieved.

First, we're going to create an Android project.

Add your own pictures to your drawable-mdpi

Then in the Res directory, create a directory with a name of Anim (animation), and implement the operation of the picture in that directory

First, Anim_alpha.xml defines an animation that implements a transparent gradient. The animation is completely opaque--fully transparent ———— > completely opaque

<pre name= "code" class= "HTML" ><?xml version= "1.0" encoding= "Utf-8"? ><set xmlns:android= "/http Schemas.android.com/apk/res/android "><alpha android:fromalpha=" 1 "    android:toalpha=" 0 "    android: Fillafter= "true"    android:repeatmode= "reverse"    android:repeatcount= "1"    android:duration= "$"/> </set>

Then you create a anim_rotate.xml file that defines an animation that implements rotation, from zero to 720 and from 360 to zero.

<?xml version= "1.0" encoding= "Utf-8"? ><set xmlns:android= "Http://schemas.android.com/apk/res/android" ><rotate     android:interpolator= "@android: Anim/accelerate_interpolator"    android:fromdegrees= "0"    android:todegrees= "720"    android:pivotx= "50%"    android:pivoty= "50%"    android:duration= ">" </rotate><rotate     android:interpolator= "@android: Anim/accelerate_interpolator"    android: startoffset= "android:fromdegrees="    android:todegrees= "0"    android:pivotx= "50%    " Android:pivoty= "50%"    android:duration= "></rotate></set>"

Create a file with a name of Anim_scale.xml defines an animation that implements scaling, which first enlarges the original image by twice times and then shrinks it to its original size;

<?xml version= "1.0" encoding= "Utf-8"? ><set  xmlns:android= "http://schemas.android.com/apk/res/ Android "><scale android:fromxscale=" 1 "    android:interpolator=" @android: Anim/decelerate_interpolator "    android:fromyscale= "1"    android:toxscale= "2.0"    android:toyscale= "2.0"    android:pivotx= "50%"    android:pivoty= "50%"    android:fillafter= "true"    android:repeatcount= "1"    android:repeatmode= " Reverse "    android:duration=" "/></set>"

Create a file with a name that is anim_translate.xml the translation of the picture moves from the left to the right and then from the right to the left

<?xml version= "1.0" encoding= "Utf-8"? ><set xmlns:android= "Http://schemas.android.com/apk/res/android" ><translate     android:fromxdelta= "0"    android:toxdelta= "860"    android:fromydelta= "0"    Android : Toydelta= "0"    android:fillafter= "true"    android:repeatmode= "reverse"    android:repeatcount= "1"    android:duration= "></translate> </set>"

So we're going to write main next. Xml:

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "android:id=" @+id/linearlayout1 "android:layout_width=" fill_parent "android:layout_height=" fill_parent "android:orientation=" vertical "> <linearlayout android:id=" @+id/linearlayout2 "Android:orienta tion= "Horizontal" android:layout_width= "Match_parent" android:layout_height= "wrap_content" > <Butto        n android:id= "@+id/button1" android:layout_width= "wrap_content" android:layout_height= "Wrap_content"        android:text= "Rotate"/> <button android:id= "@+id/button2" android:layout_width= "Wrap_content"        android:layout_height= "wrap_content" android:text= "Pan"/> <button android:id= "@+id/button3" Android:layout_width= "Wrap_content" android:layout_height= "wrap_content" android:text= "Zoom"/> &L T Button Android:id= "@+id/buTton4 "android:layout_width=" wrap_content "android:layout_height=" wrap_content "android:text=" Transparency gradient " /> </LinearLayout> <imageview android:id= "@+id/imageview1" Android:layout_width= "W Rap_content "android:layout_height=" wrap_content "android:layout_marginleft=" 50px "android:src=" @draw Able/cat "/></linearlayout>

And then modify Mainactivity.java.

Package Com.mingrisoft;import Android.app.activity;import Android.os.bundle;import android.view.view;import Android.view.view.onclicklistener;import Android.view.animation.animation;import Android.view.animation.animationutils;import Android.widget.button;import Android.widget.imageview;public Class Mainactivity extends Activity {@Overridepublic void onCreate (Bundle savedinstancestate) {super.oncreate ( Savedinstancestate); Setcontentview (R.layout.main); final Animation rotate=animationutils.loadanimation (this, r.anim.anim_rotate);//get "rotate" animation resources final Animation translate=animationutils.loadanimation (this, r.anim.anim_ translate);//get "Pan" animation resources final Animation scale=animationutils.loadanimation (this, r.anim.anim_scale);//get "zoom" Animation Resources Final Animation alpha=animationutils.loadanimation (this, r.anim.anim_alpha);//get "Transparency change" animation resource final ImageView iv= ( ImageView) Findviewbyid (R.ID.IMAGEVIEW1);//Get the Imageviewbutton button1= (Button) Findviewbyid (r.id.button1) to apply the animation effect ;//Get the "Rotate" button button1.setonclicklistener (new OnclicklIstener () {public void OnClick (View v) {iv.startanimation (rotate);//play "rotate" animation}); Button button2= (button) Findviewbyid (r.id.button2);//Get the pan button Button2.setonclicklistener (new Onclicklistener () { public void OnClick (View v) {iv.startanimation (translate);//play "Pan" animation}); Button button3= (button) Findviewbyid (r.id.button3);//Gets the Zoom button Button3.setonclicklistener (new Onclicklistener () { public void OnClick (View v) {iv.startanimation (scale);//play "Zoom" animation}); Button button4= (button) Findviewbyid (r.id.button4);//Gets the Transparency gradient button Button4.setonclicklistener (new Onclicklistener () { public void OnClick (View v) {iv.startanimation (alpha);//play "Transparency gradient" animation});}}

So our little animation is done.

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Transparency gradients, rotate animations, zoom animations, comment animations for Android animations