在配置文件中写死了当选中的时候背景图片是pressed_application_background,如何在程序中动态的设置,为每一个对象设置不同的选中背景图片
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:drawable="@drawable/pressed_application_background" />
<item android:state_window_focused="true" android:state_focused="true" android:drawable="@drawable/focused_application_background" />
<item android:state_window_focused="false" android:state_focused="true" android:drawable="@android:color/transparent" />
</selector>