the animation of Android developmentThe use(v)
This blog is mainly about the use of animationlisenter in animation, and the invocation of some life-cycle functions of this class, with the following code examples:
Mainactivity.java:
Package Com.example.animationlistener;
Import Android.os.Bundle;
Import android.app.Activity;
Import Android.view.Menu;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.view.ViewGroup;
Import Android.view.ViewGroup.LayoutParams;
Import android.view.animation.AlphaAnimation;
Import android.view.animation.Animation;
Import Android.view.animation.Animation.AnimationListener;
Import Android.widget.Button;
Import Android.widget.ImageView;
public class Mainactivity extends Activity {
Private ViewGroup viewgroup = null;
Private Button AddButton = null;
Private Button RemoveButton = null;
Private ImageView ImageView = null;
@Override
protected void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.main);
AddButton = (Button) Findviewbyid (R.id.addbutton);
Addbutton.setonclicklistener (New Addbuttonlistener ());
RemoveButton = (Button) Findviewbyid (R.id.removebutton);
Removebutton.setonclicklistener (New Removebuttonlistener ());
ViewGroup = (viewgroup) Findviewbyid (r.id.layout_id);
ImageView = (ImageView) Findviewbyid (r.id.myimage);
}
Remove ImageView Control
Class Removebuttonlistener implements onclicklistener{
@Override
public void OnClick (View v) {
TODO auto-generated Method Stub
Create an animated object with fade-out effect
Alphaanimation alphaanimation = new Alphaanimation (1.0f, 0.0f);
Alphaanimation.setduration (2000);
Setting up listeners for animation objects
Alphaanimation.setanimationlistener (New Removeanimationlistener ());
Imageview.startanimation (alphaanimation);
}
}
Adding ImageView controls
Class Addbuttonlistener implements onclicklistener{
@Override
public void OnClick (View v) {
TODO auto-generated Method Stub
Alphaanimation alphaanimation = new Alphaanimation (0.0f, 1.0f);
Alphaanimation.setduration (2000);
Create a ImageView control in the current activity
ImageView Addimageview = new ImageView (mainactivity.this);
Set the ID for ImageView
Addimageview.setid (R.id.myimage);
To set a picture resource for a ImageView control
Addimageview.setimageresource (R.drawable.ic_launcher);
ViewGroup represents the entire layout in the Main.xml
Add ImageView to the layout
Viewgroup.addview (Addimageview, New Layoutparams (Layoutparams.fill_parent, layoutparams.wrap_content));
Alphaanimation.setanimationlistener (New Addanimationlistener ());
ImageView = Addimageview;
Addimageview.startanimation (alphaanimation);
}
}
Animationlinstener is called when the animation animation effect starts and ends, and the correlation function is invoked.
Class Removeanimationlistener implements animationlistener{
Call this method when the animation effect ends
@Override
public void Onanimationend (Animation Animation) {
TODO auto-generated Method Stub
System.out.println ("Animation end");
To remove ImageView from the layout
Viewgroup.removeview (ImageView);
}
This method is called when the animation effect executes repeatedly
@Override
public void Onanimationrepeat (Animation Animation) {
TODO auto-generated Method Stub
System.out.println ("Animation repeat");
}
This method is called when the animation effect starts executing
@Override
public void Onanimationstart (Animation Animation) {
TODO auto-generated Method Stub
System.out.println ("Animation start");
}
}
@Override
public boolean Oncreateoptionsmenu (Menu menu) {
Inflate the menu; This adds items to the action bar if it is present.
Getmenuinflater (). Inflate (R.menu.main, menu);
return true;
}
}
Main layout file Main.xml:
<relativelayout xmlns:android= "Http://schemas.android.com/apk/res/android"
Xmlns:tools= "Http://schemas.android.com/tools"
Android:id= "@+id/layout_id"
Android:layout_width= "Match_parent"
android:layout_height= "Match_parent"
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= ". Mainactivity ">
<textview
Android:id= "@+id/mytext"
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"
android:text= "@string/hello_world"/>
<imageview
Android:id= "@+id/myimage"
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
android:src= "@drawable/ic_launcher"
android:layout_below= "@id/mytext"
/>
<button
Android:id= "@+id/addbutton"
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
android:layout_below= "@id/myimage"
android:text= "Add Image"
/>
<button
Android:id= "@+id/removebutton"
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
android:layout_below= "@id/addbutton"
android:text= "Remove Image"
/>
</RelativeLayout>
Android Development Animation (Fri)
