Android game development system control-ImageButton

Android game development system control-ImageButton

ImageButton is similar to Button. The difference is that ImageButton can customize an image as a Button;

Because the image replaces the button, you need to customize the effect of pressing and lifting ImageButton.

The following is an example of learning ImageButton:

Create an ImageButton Project

Simulator running effect:

Press the button:

 


Lift button:






 

Project source code:

Modify main. xml as follows:

[Html]
<? Xml version = "1.0" encoding = "UTF-8"?>
<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
Android: orientation = "vertical">
 
<ImageButton
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: id = "@ + id/imageBtn"
Android: background = "@ drawable/nopress"/>
 
</LinearLayout>
<? Xml version = "1.0" encoding = "UTF-8"?>
<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
Android: orientation = "vertical">

<ImageButton
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: id = "@ + id/imageBtn"
Android: background = "@ drawable/nopress"/>

</LinearLayout>
 

The ImageButtonActivity. java code is modified as follows:

[Java]
Package com. ImageButton;
 
Import android. app. Activity;
Import android. OS. Bundle;
Import android. view. MotionEvent;
Import android. view. View;
Import android. view. View. OnTouchListener;
Import android. widget. ImageButton;
 
Public class ImageButtonActivity extends Activity {
Private ImageButton Ibtn;
/** Called when the activity is first created .*/
@ Override
Public void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. main );
Ibtn = (ImageButton) findViewById (R. id. imageBtn );
// Add a touch screen listener for the image button
Ibtn. setOnTouchListener (new OnTouchListener (){
Public boolean onTouch (View v, MotionEvent event ){
// The current user is press
If (event. getAction () = MotionEvent. ACTION_DOWN ){
// Set the image button background image

Ibtn. setBackgroundDrawable (getResources (). getDrawable (R. drawable. press ));
// The user is currently up
} Else if (event. getAction () = MotionEvent. ACTION_UP ){

Ibtn. setBackgroundDrawable (getResources (). getDrawable (R. drawable. nopress ));
}
Return false;
}
});
}
}

 

Author wwj