代码实现 按钮点击出现不同的图片或者颜色

改变button的颜色

StateListDrawable stateListDrawable = new StateListDrawable();

ColorDrawable colorDrawableNormal = new ColorDrawable();
ColorDrawable colorDrawablePressed = new ColorDrawable();

colorDrawableNormal.setColor(Color.BLUE);
colorDrawablePressed.setColor(Color.RED);

//按下状态
stateListDrawable.addState(new int[]{android.R.attr.state_pressed}, colorDrawablePressed);

//正常状态
stateListDrawable.addState(new int[]{}, colorDrawableNormal);
btn1.setBackground(stateListDrawable);

改变button的背景

StateListDrawable stateListDrawable = new StateListDrawable();

Drawable drawablePressed =  getResources().getDrawable(R.mipmap.ic_action_add);

//按下状态
stateListDrawable.addState(new int[]{android.R.attr.state_pressed}, drawablePressed);

//正常状态
stateListDrawable.addState(new int[]{}, colorDrawableNormal);
btn1.setBackground(stateListDrawable);