android:onClick --new attribute from SDK 1.6

From android 1.6 adds a new feature for the declaration of the “on-click” listener for a Button. In addition to the classic approach of defining some object (such as the activity) as implementing the    View.OnClickListener interface, you can now take a somewhat simpler approach:

•  Define some method on your Activity that holds the button that takes a single View parameter, has a void return value, and is public.

•  In your layout XML, on the Button element, include the  android:onClick attribute with the name of the method you defined in  the previous step.

For example,  we might have a method on our Activity that looks like:

public void updateTime(View view){
    	((Button)view).setText("android:onClick attributes");
}

Then , we could use this XML declaration for the Button itself, including android:onClick

<Button android:layout_width="fill_parent"
		android:layout_height="fill_parent" android:id="@+id/button"
		android:onClick="updateTime"></Button>

OK, now we can run the code , click the button and we get the new text for the button.

 

评论

1 楼 ray_linn 2011-01-24  

google简直是小白啊，只有onClick其他事件都没有。。。