Drawables Alpha改变TabHost标签切换

当我在TabHost中的标签之间点击时，我需要改变我的标签页的drawables的alpha值。我这样做：Drawables Alpha改变TabHost标签切换

getTabHost().setOnTabChangedListener(new OnTabChangeListener() { 

         public void onTabChanged(String tabId) { 
          Activity currentActivity = getCurrentActivity(); 
          Log.i("choosed activity", currentActivity.toString()); 
          if (currentActivity instanceof LoginActivity) { 
           Log.i("current activity", "LoginActivity"); 
           getResources().getDrawable(R.drawable.login).setAlpha(255); 
           getResources().getDrawable(R.drawable.signup).setAlpha(80); 
           getResources().getDrawable(R.drawable.close).setAlpha(80); 
          } 
          if (currentActivity instanceof RegisterActivity) { 
           Log.i("current activity", "RegisterActivity"); 
           getResources().getDrawable(R.drawable.login).setAlpha(80); 
           getResources().getDrawable(R.drawable.signup).setAlpha(255); 
           getResources().getDrawable(R.drawable.close).setAlpha(80); 
          } 
});

当前活动确定成功，但alpha只在我翻过设备时才会改变。请告诉我，我该如何解决这个问题？

来源

2013-02-04 user1986958

也许你应该尝试：invalidate()设置新的alpha值后

来源

2013-02-13 13:28:47

Drawables Alpha改变TabHost标签切换

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