TextView雜知識

第一：獲取 textview判斷是否有省略號

方法一：getlineCount()  返回值爲0

Layout l = location.getLayout();
         if ( l!= null){
             int lines = location.getLineCount();
             Log.v(TAG, "location有幾行"+lines);
             if ( lines > 1)
              contentLayout.setOrientation(LinearLayout. VERTICAL);
         }   
         

方法二：可用，但是textview有省略號，getlineCount() 也是返回 1

         location.post(new Runnable() {
            @Override
            public void run() {
             Log.v(TAG,"當前"+location.getLineCount());
            }
         });
        

方法三：可用，textview有省略號，getlineCount() 也是返回 1；l.getEllipsisCount(lines-1) > 0 可以判斷是否有省略號

         ViewTreeObserver vto = location.getViewTreeObserver();

         vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

             @Override

             public void onGlobalLayout() {

                Layout l = location.getLayout();

                if ( l != null){

                   int lines = l.getLineCount();
                   Log.v(TAG, "最後一個方法location有幾行"+lines);
                   if ( lines > 0)

                       if ( l.getEllipsisCount(lines-1) > 0)

                   /* 判斷有省略號後的動作*/

                   contentLayout.setOrientation(LinearLayout. VERTICAL);

                } 

             }

         });

第二：代碼動態改變文字顏色

textview.setTextColor(this.getResources().getColor(R.color.white));

第三：代碼改變TextView背景顏色

qianyan_layout.setBackgroundResource(R.color.tab_top_bg);