要求宽高比：宽高640240px
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
app:layout_constraintTop_toBottomOf="@+id/linearLayout1">
<ImageView
android:id="@+id/imageView3"
android:layout_width="match_parent"
android:layout_height="120dp"
android:scaleType="centerCrop"
android:src="@mipmap/image032504" />
</LinearLayout>
int width = ViewUtil.getScreenWidth(context);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width, (width - ViewUtil.dp2px(context, 32)) * 240 / 640);
imageView3.setLayoutParams(params);
Glide.with(context).load(dataBean.getImages()).into(imageView3);
用到所需方法：
private static int mScreenWidth;
/**
* 获取手机屏幕宽度
*
* @param context 上下文
* @return 屏幕的宽度
*/
public static int getScreenWidth(Context context) {
if (mScreenWidth <= 0) {
mScreenWidth = context.getResources().getDisplayMetrics().widthPixels;
}
return mScreenWidth;
}
/**
* 将dp值转换为px值
*/
public static int dp2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}