Android 根据 if 语句更改布局

Question

我正在尝试根据屏幕尺寸扩充 View ，以便我可以使用不同的布局

我试过以下方法

double screen_size = 8

if screen_size >= 10 {
    layoutInflator =(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View row = layoutInflator.inflate(R.layout.mylist, parent, false);
} 

if screen_size >= 5 && screen_size  <=9){
    layoutInflator =(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View row = layoutInflator.inflate(R.layout.mylist2, parent, false);
} 

TextView textview1 = (TextView) row.findViewById(R.id.textView1);

我在 Textview 上收到一个错误，说即使正在运行 if 语句，也无法解析 row

如果我改成

double screen_size = 8

if screen_size >= 10 {
    layoutInflator =(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View row = layoutInflator.inflate(R.layout.mylist2, parent, false);
} 

if screen_size >= 5 && screen_size  <=9){
    layoutInflator =(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View row = layoutInflator.inflate(R.layout.mylist2, parent, false);
    } 

View row = layoutInflator.inflate(R.layout.mylist, parent, false);

TextView textview1 = (TextView) row.findViewById(R.id.textView1);

它运行良好但总是运行布局 mylist 而不是 mylist2

我哪里出错了

感谢任何帮助

标记

Answer 1

在 if 语句之外声明 row，如下所示:

double screen_size = 8
View row = null;

if (screen_size >= 10 {
    layoutInflator =(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    row = layoutInflator.inflate(R.layout.mylist2, parent, false);
} 

if (screen_size >= 5 && screen_size  <=9){
    layoutInflator =(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    row = layoutInflator.inflate(R.layout.mylist2, parent, false);
} 

TextView textview1 = (TextView) row.findViewById(R.id.textView1);