Show a Toast which is positioned to the left of a given View. The message in the Toast is the content description of the View.

ShowToastLeftOfView.java

/**
 * Shows a {@link Toast} which is positioned to the left of a given {@link View}.
 * The message in the {@link Toast} is the content description of the {@link View}.
 * <p>
 * Much of the code in this method is inspired by <a href="https://stackoverflow.com/a/21026866/1071320">this</a> StackOverflow answer.
 */
private void showContentDescriptionOfViewAsToast(View view) {
    // toasts are positioned relative to the decor view and views relative to their parents;
    // we have to gather additional data to have a common coordinate system
    Rect rect = new Rect();
    getActivity().getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);

    int[] viewLocation = new int[2];
    view.getLocationInWindow(viewLocation);

    // covert view's absolute position to a position which is relative to the decor view
    int viewLeft = viewLocation[0] - rect.left;
    int viewTop = viewLocation[1] - rect.top;

    Toast toast = Toast.makeText(getContext(), view.getContentDescription(), Toast.LENGTH_SHORT);

    int toastHeight = getToastHeight(toast);
    int viewHeight = view.getHeight();

    int screenWidthPixels = getResources().getDisplayMetrics().widthPixels;
    int horizontalMargin = getResources().getDimensionPixelOffset(R.dimen.view_horizontal_margin);

    int toastXOffset = (screenWidthPixels - viewLeft) + horizontalMargin;
    int toastYOffset;

    if (viewHeight > toastHeight) {
        toastYOffset = viewTop + ((viewHeight - toastHeight) / 2);
    } else {
        toastYOffset = viewTop - ((toastHeight - viewHeight) / 2);
    }

    toast.setGravity(Gravity.RIGHT | Gravity.TOP, toastXOffset, toastYOffset);
    toast.show();

    return true;
}

/**
 * @return the measured height of the given {@link Toast}.
 */
private int getToastHeight(Toast toast) {
    DisplayMetrics displayMetrics = getResources().getDisplayMetrics();

    int widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, View.MeasureSpec.UNSPECIFIED);
    int heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, View.MeasureSpec.UNSPECIFIED);

    toast.getView().measure(widthMeasureSpec, heightMeasureSpec);

    return toast.getView().getMeasuredHeight();
}