http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2014/0924/1712.html
private StateListDrawable addStateDrawable(Context context, int idNormal, int idPressed, int idFocused) { StateListDrawable sd = new StateListDrawable(); Drawable normal = idNormal == -1 ? null : context.getResources().getDrawable(idNormal); Drawable pressed = idPressed == -1 ? null : context.getResources().getDrawable(idPressed); Drawable focus = idFocused == -1 ? null : context.getResources().getDrawable(idFocused); //注意该处的顺序,只要有一个状态与之相配,背景就会被换掉 //所以不要把大范围放在前面了,如果sd.addState(new[]{},normal)放在第一个的话,就没有什么效果了 sd.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_focused}, focus); sd.addState(new int[]{android.R.attr.state_pressed, android.R.attr.state_enabled}, pressed); sd.addState(new int[]{android.R.attr.state_focused}, focus); sd.addState(new int[]{android.R.attr.state_pressed}, pressed); sd.addState(new int[]{android.R.attr.state_enabled}, normal); sd.addState(new int[]{}, normal); return sd; }