Question

是否可以通过java更改按钮上的drawable？

实施例;我有一个这样的按钮。

<Button 
style="@style/Buttons" 
android:id="@+id/butFavTeam"
android:drawableBottom="@drawable/venue"/>

我想用我的drawable目录中的另一个更改当前的drawableBottom图像。

Answer 1

你看过这个方法了吗？

/*
Sets the Drawables (if any) to appear to the left of, above, to the right of, and below the text. Use 0 if you do not want a Drawable there. The Drawables' bounds will be set to their intrinsic bounds.
*/
public void  setCompoundDrawablesWithIntrinsicBounds  (Drawable left, Drawable top, Drawable right, Drawable bottom)

试试这个：

/*remember to first clear the callback of the drawable you are replacing to prevent memory leaks...
* Get the Drawables for the button by calling: myButton.getCompoundDrawables(), then loop through that calling myOldDrawable.setCallback(null);
* e.g:*/

for(Drawable myOldDrawable : myButton.getCompoundDrawables())
{
   myOldDrawable.setCallback(null);
}

//use null where you don't want a drawable
myButton.setCompoundDrawablesWithIntrinsicBounds(null,null,null, myNewDrawable);

我希望有所帮助。

Answer 2

刚刚找到它。

Drawable myIcon = this.getResources().getDrawable(R.drawable.myVenue);
butFavTeam.setCompoundDrawablesWithIntrinsicBounds(null, null, null, myIcon);

Answer 3

顺便说一下......确保你不小心使用方法setCompoundDrawables（）。它采用与setCompoundDrawablesWithIntrinsicBounds（）相同的参数，但显然也期待一些边界细节。

我因此而懒散地接受了第一种预先输入方法。我发布这个，以防你也无法弄清楚图像没有显示的原因。

用java改变drawableBottom

3 个答案: