Android app Click Event and touch event processing

 

I. Differences between click events and touch events:

Click Event: For a button, the system responds to both the button and the touch screen event;

Touch event: For a button, only the touch screen event is returned;

Therefore, we recommend that you use the click event to process the button control.

 

Ii. Click Event Processing Template

Import Android. View. View. onclicklistener;

 

Public class XXXX activityextends Activity

{

Private onclicklistener otl_conn = (onclicklistener) New clicklistenerconn ();

Private button bv = NULL;

 

Protected void oncreate (bundle savedinstancestate)

{

Super. oncreate (savedinstancestate );

Setcontentview (R. layout. xxxx );

 

Bv = (button) findviewbyid (R. Id. xxxxbutton );

BV. setonclicklistener (otl_conn );

}

 

Class clicklistenerconn implements onclicklistener

{

Public void onclick (view v ){

Xxxxxx ......

}

}

}

 

Layout/xxxx. xml

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

Android: layout_width = "fill_parent" Android: layout_height = "fill_parent"

Android: Orientation = "vertical" Android: Background = "# fff">

 

<Button Android: Id = "@ + ID/connbutton"

Android: text = "Connect"

Android: textcolor = "#000"

Android: textsize = "20sp"

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"/>

</Linearlayout>

 

 

3. Touch event processing Template

Import Android. View. View. ontouchlistener;

 

Public class XXXX activityextends Activity

{

Private ontouchlistener otl_conn = (ontouchlistener) New touchlistenerconn ();

Private button bv = NULL;

 

Protected void oncreate (bundle savedinstancestate)

{

Super. oncreate (savedinstancestate );

Setcontentview (R. layout. xxxx );

 

Bv = (button) findviewbyid (R. Id. xxxxbutton );

BV. setontouchlistener (otl_conn );

}

 

Class touchlistenerconn implements ontouchlistener

{

Public Boolean ontouch (view V, motionevent event ){

Switch (event. getaction ()){

Case motionevent. action_down:

XXXX ....;

Break;

}

Return true;

}

}

}

 

Layout/xxxx. xml

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

Android: layout_width = "fill_parent" Android: layout_height = "fill_parent"

Android: Orientation = "vertical" Android: Background = "# fff">

 

<Button Android: Id = "@ + ID/connbutton"

Android: text = "Connect"

Android: textcolor = "#000"

Android: textsize = "20sp"

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"/>

</Linearlayout>

 

4. Click Event Processing another simplified Template

Import Android. View. View. onclicklistener;

 

Public class XXXX activityextends activity implements view. onclicklistener

{

Protected void oncreate (bundle savedinstancestate)

{

Super. oncreate (savedinstancestate );

Setcontentview (R. layout. xxxx );

 

Findviewbyid (R. Id. connbutton). setonclicklistener (this );

}

 

Public void onclick (view v ){

Switch (V. GETID ()){

Case R. Id. connbutton:

Xxxxxx ......

Break;

}

}

}

 

 

Reprinted please indicate the source: http://blog.csdn.net/ccwwff/archive/2010/08/18/5821419.aspx