How to get distance between views in pixels?

android, android-relativelayout, imageview, java

Solution

To calculate the distance between the bottom of the one view and the top of the other view:

View oneView = ...;
View otherView = ...;

RectF oneRect = calculateRectOnScreen(oneView);
RectF otherRect = calculateRectOnScreen(otherView);

float distance = Math.abs(oneRect.bottom - otherRect.top);

The util method:

public static RectF calculateRectOnScreen(View view) {
    int[] location = new int[2];
    view.getLocationOnScreen(location);
    return new RectF(location[0], location[1], location[0] + view.getMeasuredWidth(), location[1] + view.getMeasuredHeight());
}

In some cases you need to replace the `view.getLocationOnScreen` to `view.getLocationInWindow`.

Problem

As shown in below image. I do have one `relative layout`. I have my `ImageView` in same and I need to get gap in pixels between view starts and this ImageView. My activity is as below. Please advice. I tried various ways like `topY()` but couldn't find solution. ``` <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <LinearLayout android:id="@+id/main_ruler_linear_layout" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:orientation="horizontal" > </LinearLayout> <ImageView android:id="@+id/line_image" android:layout_width="match_parent" android:layout_height="match_parent" android:src="@drawable/line"/> <EditText android:id="@+id/txtRulerCenterPosition" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignTop="@+id/main_ruler_linear_layout" android:layout_marginRight="17dp" android:layout_marginTop="16dp" android:ems="10" android:textSize="5dp" android:focusable="false"/> </RelativeLayout> ```

Original source