Android - getHeight() 和 getWidth()

Question

我正在 relativeLayout 中动态创建一些 ImageView，但我需要根据屏幕的高度和宽度改变大小。在我设置高度时，尚未创建 View 和布局，这意味着 getHeight() 和 getWidth() 返回 0。我查看了其他线程在 StackOverflow 上，但似乎没有一个足够具体地解决我的问题。

我正在一个 fragment 中完成所有这些工作，如果能提供有关如何解决此问题的任何指导，我将不胜感激。她是我的一小段代码。

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState){
    View v = inflater.inflate(R.layout.fragment_hello_moon, parent, false);

    RelativeLayout rl = (RelativeLayout) v.findViewById(R.id.l1);
    tl.setBackgroundColor(Color.RED);

    ArrayList<ImageView> imgViews = new ArrayList<ImageView>();

    //Cant get height or width of parent as hasnt been created yet
    int numberOfBells = 16;
    int height = rl.getHeight() / numberOfBells;
    int width = rl.getWidth() / 2;

    final ImageView imageTopL = new ImageView(getActivity());

    if (true){
        imageTopL.setId(1);
        imageTopL.setImageResource(R.drawable.bell_dl_256);

        RelativeLayout.LayoutParams params1 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);

        params1.addRule(RelativeLayout.ALIGN_PARENT_TOP);
        params1.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
        params1.setMargins(50,10,0,10);

        imageTopL.setLayoutParams(params1);

        //Need the size to vary depending on the height/width
        imageTopL.getLayoutParams().height = height;
        imageTopL.getLayoutParams().width = width;

        imageTopL.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                imageTopL.setImageResource(R.drawable.bell_ul_256);
            }
        });

        imgViews.add(imageTopL);
    }
  for(ImageView i : imgViews){
        rl.addView(i);
    }

    return v;
}

Answer 1

要获取屏幕的大小，您可以尝试:

 DisplayMetrics metrics = this.getResources().getDisplayMetrics();
  int width = metrics.widthPixels;
  int height = metrics.heightPixels;

看这个:Get screen dimensions in pixels