如何将设备作为LDPI MDPI HDPI或XHDPI查找

Question

没有应用程序的任何代码段，如何获得屏幕分辨率和屏幕长度。我怎么能找到设备是ldpi，mdpi，hdpi还是xhdpi？

Answer 1

修改 使用DisplayMetrics获取屏幕密度

getResources().getDisplayMetrics().densityDpi;

这将返回表示以下常量的int值。 DisplayMetrics.DENSITY_LOW ,DisplayMetrics.DENSITY_MEDIUM, DisplayMetrics.DENSITY_HIGH, DisplayMetrics.DENSITY_XHIGH

  int density= getResources().getDisplayMetrics().densityDpi;

switch(density)
{
case DisplayMetrics.DENSITY_LOW:
   Toast.makeText(context, "LDPI", Toast.LENGTH_SHORT).show();
    break;
case DisplayMetrics.DENSITY_MEDIUM:
     Toast.makeText(context, "MDPI", Toast.LENGTH_SHORT).show();
    break;
case DisplayMetrics.DENSITY_HIGH:
    Toast.makeText(context, "HDPI", Toast.LENGTH_SHORT).show();
    break;
case DisplayMetrics.DENSITY_XHIGH:
     Toast.makeText(context, "XHDPI", Toast.LENGTH_SHORT).show();
    break;
}

这将返回  以下常量基于thsi，您可以识别设备

---

试试这个

int screenSize = getResources().getConfiguration().screenLayout &
        Configuration.SCREENLAYOUT_SIZE_MASK;

switch(screenSize) {
    case Configuration.SCREENLAYOUT_SIZE_LARGE:
        Toast.makeText(this, "Large screen",Toast.LENGTH_LONG).show();
        break;
    case Configuration.SCREENLAYOUT_SIZE_NORMAL:
        Toast.makeText(this, "Normal screen",Toast.LENGTH_LONG).show();
        break;
    case Configuration.SCREENLAYOUT_SIZE_SMALL:
        Toast.makeText(this, "Small screen",Toast.LENGTH_LONG).show();
        break;
    default:
        Toast.makeText(this, "Screen size is neither large, normal or small" , Toast.LENGTH_LONG).show();
}

来源Identifying screen resolutions

Answer 2

DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int density = dm.densityDpi;

密度变量是DisplayMetrics中定义的常量，对应于不同的dpis。