ImageView动态设置宽高

要求宽高比：宽高640240px
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
app:layout_constraintTop_toBottomOf="@+id/linearLayout1">

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);
}