在Set动态图像选择器上冻结应用程序

Question

I need to set Selector dynamically  

我从How to set an image as a Background to a Button using StateListDrawable (dynamically or programmatically or through code)

获得了帮助

当我尝试设置默认图像时，它不起作用

state.addState(new int[] { },selectedthumb);

请帮帮我

我尝试了什么

StateListDrawable state = new StateListDrawable();
state.addState(new int[] { android.R.attr.state_selected },
                        selectedthumb);
state.addState(new int[] { android.R.attr.state_focused },  thumb);

state.addState(new int[] {  },thumb);

Answer 1

public void selector(Button b,int selectedthumb,int thumb)
    {
        StateListDrawable states = new StateListDrawable();
        states.addState(new int[] {- android.R.attr.state_pressed }, getResources().getDrawable(selectedthumb));
        states.addState(new int[] {}, getResources().getDrawable(thumb));
        b.setBackgroundDrawable(states);
    }

Answer 2

Check this answer 您需要使用所需状态的负值。 E.g：

states.addState(new int[] {-android.R.attr.state_enabled},R.drawable.btn_disabled);