Android設置高度

我在嘗試使用展開/摺疊動畫設置線性佈局的高度時遇到了一些問題。下面是我的XML：Android設置高度

<RelativeLayout 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" > 

     <Button 
      android:id="@+id/btnNewsFeed" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:background="@color/lightred" 
      android:minHeight="20dp" 
      android:paddingBottom="5dp" 
      android:text="News feed" 
      android:textColor="#FFFFFF" 
      android:textSize="13dp" /> 

     <LinearLayout 
      android:id="@+id/llNewsFeed" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:layout_below="@+id/btnNewsFeed" 
      android:background="#FFFFFF" 
      android:orientation="vertical" 
      android:visibility="gone" > 

      <ListView 
       android:id="@+id/EventNewsFeedListview" 
       android:layout_width="fill_parent" 
       android:layout_height="fill_parent" 
       android:listSelector="#F6CECE" > 
      </ListView> 
     </LinearLayout> 
    </RelativeLayout>

而當我的按鈕的onClick，它要麼執行擴大（）或COLAPSE（）：

btnNewsFeed.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      if (llNewsFeed.getVisibility() == View.GONE) { 
       expand(); 
      } else { 
       collapse(); 
      } 
     }); 

private void expand() { 
    llNewsFeed.setVisibility(View.VISIBLE); 
    final int widthSpec = View.MeasureSpec.makeMeasureSpec(0, 
      View.MeasureSpec.UNSPECIFIED); 
    final int heightSpec = View.MeasureSpec.makeMeasureSpec(0, 
      View.MeasureSpec.UNSPECIFIED); 
    llNewsFeed.measure(widthSpec, heightSpec); 

    ValueAnimator mAnimator = slideAnimator(0, 
      llNewsFeed.getMeasuredHeight()); 
    mAnimator.start(); 
} 

private ValueAnimator slideAnimator(int start, int end) { 
    ValueAnimator animator = ValueAnimator.ofInt(start, end); 
    animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { 
     public void onAnimationUpdate(ValueAnimator valueAnimator) { 
      int value = (Integer) valueAnimator.getAnimatedValue(); 
      ViewGroup.LayoutParams layoutParams = llNewsFeed 
        .getLayoutParams(); 
      layoutParams.height = value; 
      llNewsFeed.setLayoutParams(layoutParams); 
     } 
    }); 
    return animator; 
} 

private void collapse() { 
    int finalHeight = llNewsFeed.getHeight(); 
    ValueAnimator mAnimator = slideAnimator(finalHeight, 0); 
    mAnimator.addListener(new Animator.AnimatorListener() { 
     public void onAnimationEnd(Animator animator) { 
      llNewsFeed.setVisibility(View.GONE); 
     } 

     public void onAnimationCancel(Animator arg0) { 
     } 

     public void onAnimationRepeat(Animator arg0) { 
     } 

     public void onAnimationStart(Animator arg0) { 
     } 
    }); 
    mAnimator.start(); 
}

但我發現了這樣的輸出：

enter image description here

新聞饋送的高度太小了。我想知道是否有任何方法將它設置爲填充父項？

在此先感謝。

來源

2014-12-03 hyperfkcb

任何想法？因爲我不確定哪個部分出了問題。在llNewsFeed內部，我有一個滾動條上下滾動。但我希望它填補父母 – hyperfkcb 2014-12-03 13:53:06

我想出了一個辦法來解決這個問題：

ValueAnimator mAnimator = slideAnimator(0, 
     llNewsFeed.getMeasuredHeight() * 3);

來源

2014-12-03 13:57:34 hyperfkcb

Android設置高度

回答

相關問題