Drawables Alpha改變TabHost標籤切換

當我在TabHost中的標籤之間點擊時，我需要改變我的標籤頁的drawables的alpha值。我這樣做：Drawables Alpha改變TabHost標籤切換

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); 
          } 
});

當前活動確定成功，但alpha只在我翻過設備時纔會改變。請告訴我，我該如何解決這個問題？

來源

2013-02-04 user1986958

也許你應該嘗試：invalidate()設置新的alpha值後

來源

2013-02-13 13:28:47

Drawables Alpha改變TabHost標籤切換

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