的Android Studio無法解析法addRule（）

Question

ViewGroup.LayoutParams layoutParams = new RelativeLayout.LayoutParams(containerWidth, fragmentHeight); 
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 

，我得到：錯誤：無法找到符號方法addRule（INT）

的Android Studio版本0.4.5

Answer 1

因爲使用ViewGroup.LayoutParams

ViewGroup.LayoutParams layoutParams = new RelativeLayout.LayoutParams(containerWidth, fragmentHeight); 
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 

但該方法addRule是在子類RelativeLayout.LayoutParams實現的，所以你可能要改用：

RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(containerWidth, fragmentHeight); 
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 

看到documentation of RelativeLayout.LayoutParams here

Answer 2

應該

RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(containerWidth, fragmentHeight); 
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);