A good menu display animation effect

Let's take a look at the animation effect of a good Android boot menu made by foreigners.

1. First, place some images for animation in the drawable directory.

2 splash. xml:

<? XML version = "1.0" encoding = "UTF-8"?>

<Linearlayout

Xmlns: Android = "http://schemas.android.com/apk/res/android"

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"

Android: Id = "@ + ID/thesplashlayout"

Android: layout_gravity = "center"

>

<Imageview

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"

Android: Id = "@ + ID/splashimageview"

Android: layout_gravity = "center"

>

</Imageview>

3. Main. xml

<? XML version = "1.0" encoding = "UTF-8"?>

<Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android"

Android: Orientation = "vertical"

Android: layout_width = "fill_parent"

Android: layout_height = "fill_parent"

>

<Textview

Android: layout_width = "fill_parent"

Android: layout_height = "wrap_content"

Android: text = "@ string/hello"

/>

</Linearlayout>

3 splashscreen. Java

Here is the core part of the welcome startup class

Public class splashscreen extends activity {

/**

* The thread to process splash screen events

*/

Private thread msplashthread;

/** Called when the activity is first created .*/

@ Override

Public void oncreate (bundle savedinstancestate ){

Super. oncreate (savedinstancestate );

// Splash screen view

Setcontentview (R. layout. Splash );



// Start animating the image

Final imageview splashimageview = (imageview) findviewbyid (R. Id. splashimageview );

Splashimageview. setbackgroundresource (R. drawable. Flag );

Final animationdrawable frameanimation = (animationdrawable) splashimageview. getbackground ();

Splashimageview. Post (New runnable (){

Public void run (){

Frameanimation. Start ();

}

});





Final splashscreen = this;



// The thread to wait for splash screen events

Msplashthread = new thread (){

@ Override

Public void run (){

Try {

Synchronized (this ){

// Wait given period of time or exit on touch

Wait (5000 );

}

}

Catch (interruptedexception ex ){

}

Finish ();



// Run next activity

Intent intent = new intent ();

Intent. setclass (splashscreen, mainactivity. Class );

Startactivity (intent );

Stop ();

}

};



Msplashthread. Start ();



}

@ Override

Public Boolean oncreateoptionsmenu (menu ){

Super. oncreateoptionsmenu (menu );

Return false;

}

 

/**

* Processes splash screen touch events

*/

@ Override

Public Boolean ontouchevent (motionevent EVT)

{

If (EVT. getaction () = motionevent. action_down)

{

Synchronized (msplashthread ){

Msplashthread. policyall ();

}

}

Return true;

}

4. Add a style file under the values directory for better looks.

Styles. xml:

<Resources>

<Style name = "animations" parent = "@ Android: Animation"/>

<Style name = "animations. splashscreen">

<Item name = "Android: windowenteranimation"> @ anim/appear </item>

<Item name = "Android: javaswexitanimation"> @ anim/disappear </item>

</Style>

<Style name = "theme. Transparent" parent = "Android: Theme">

<Item name = "Android: javaswistranslucent"> true </item>

<Item name = "Android: windowbackground"> @ Android: color/transparent </item>

<Item name = "Android: windowcontentoverlay"> @ null </item>

<Item name = "Android: windownotitle"> true </item>

<Item name = "Android: incluwisfloating"> true </item>

<Item name = "Android: backgrounddimenabled"> false </item>

<Item name = "Android: windowanimationstyle"> @ style/animations. splashscreen </item>

</Style>

</Resources>

Note <style name = "animations" parent = "@ Android: Animation"/>

<Style name = "animations. splashscreen">

<Item name = "Android: windowenteranimation"> @ anim/appear </item>

<Item name = "Android: javaswexitanimation"> @ anim/disappear </item>

</Style>

Defines the animation effect when entering and exiting. More details

The anim directory contains the following XML definitions:

Appear. xml:

<Set xmlns: Android = "http://schemas.android.com/apk/res/android">

<Alpha

Android: interpolator = "@ Android: anim/accelerate_interpolator"

Android: fromalpha = "0.0" Android: toalpha = "1.0"

Android: duration= "800"

/>

</Set>

Disppear. xml:

<Set xmlns: Android = "http://schemas.android.com/apk/res/android">

<Alpha

Android: interpolator = "@ Android: anim/decelerate_interpolator"

Android: fromalpha = "1.0" Android: toalpha = "0.0"

Android: duration= "800"

/>

</Set>

Here is the setting of transparency:

Then, in manifest. XML, set the style to be used:

<Activity

Android: Name = "splashscreen"

Android: theme = "@ style/theme. Transparent"

>

<Intent-filter>

<Action Android: Name = "android. Intent. Action. Main"> </Action>

<Category Android: Name = "android. Intent. Category. launcher"> </Category>

</Intent-filter>

</Activity>

You can.

5. Set the animation effect:

Splashimageview. setbackgroundresource (R. drawable. Flag );

Final animationdrawable frameanimation = (animationdrawable) splashimageview. getbackground ();

Splashimageview. Post (New runnable (){

Public void run (){

Frameanimation. Start ();

}

});

Because the animation effect settings cannot be directly set in oncreate, but must be created from the GUI thread

Use the POST method of the imageview class to display the animation when the GUI is created.

Detailed code can be downloaded from the attachment

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