Android更改图像按钮背景

Question

I cannot seem to change the background image of my image button. Heres the code i'm currently trying to use:

ImageButton imgButton = (ImageButton) findViewById(R.id.showSportsButton);
imgButton.setBackgroundResource(R.drawable.tab2_selected);

However this seem to be placing the new image on top of the old image leaving me with 2 images overlapping each other.

Does anyone know why this is??

Answer 1

为了解决这个问题，您应该实施

imgButton.setImageResource(R.drawable. tab2_selected);

Answer 2

使用此方法：

imgButon.setBackground(getActivity().getDrawable(R.drawable.your_icon));

Answer 3

在xml文件中， <Button>写入： android:backgroud="@drawable/your_file"

Answer 4

Make sure you are on same activity. If you are changing background of different activity first create the constructor then use object to change button.

Activity obj= new activity();
obj.imgButton.setBackgroundResource(R.drawable.tab2_selected);

and also check that oncreate() method has void return type if you are using only findviewbyid .