如何解决Android程序“从不本地读取”中的警告？ [英] how to solve warning in android program "never read locally"

问题描述

为什么我会收到警告：

The field testscreen.ScaleAnimToShow.mVanishAfter is never read locally testscreen.java /testscreen/src/com/testscreen  line 186    Java Problem

来自以下代码？

public class ScaleAnimToShow extends ScaleAnimation{
       private View mView;
       private LayoutParams mLayoutParams;
       private int mMarginBottomFromY, mMarginBottomToY;
       private boolean mVanishAfter = false;

       public ScaleAnimToShow(float toX, float fromX, float toY, float fromY, int duration, View view,boolean vanishAfter){
           super(fromX, toX, fromY, toY);
           openLayout = view;
           setDuration(duration);
           mView = view;
           mVanishAfter = vanishAfter;
           mLayoutParams = (LayoutParams) view.getLayoutParams();
           mView.setVisibility(View.VISIBLE);
           int height = mView.getHeight();
           //mMarginBottomFromY = (int) (height * fromY) + mLayoutParams.bottomMargin + height;
           //mMarginBottomToY = (int) (0 - ((height * toY) + mLayoutParams.bottomMargin)) + height;
           mMarginBottomFromY = 0;
           mMarginBottomToY = height;
           Log.v("CZ",".................height..." + height + " , mMarginBottomFromY...." + mMarginBottomFromY  + " , mMarginBottomToY.." +mMarginBottomToY);
       }

推荐答案

这是因为您拥有该字段会在内存中占用一些空间，但是永远不会在程序中的任何地方读取该内容。

That's because you have the field that occupies some space in memory but which is never read anywhere in your program.

您可以解决此警告：

• 删除此字段。如果您不使用它，请不要将其保留在代码中。
  
  或


• 添加 @SuppressWarnings（ unused）批注。当通过注释使用此字段或出于其他原因要将其保留在代码中时，这可能很有用。

• Remove this field. If you don't use it, don't keep it in your code.
  or
• Add @SuppressWarnings("unused") annotation. This may be useful when this field is used via annotation, or you want to keep it in code for other reasons.

@SuppressWarnings("unused")
private boolean mVanishAfter = false;

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