Given a view, finds recursively a view with the point inside and which have ID - Android User Interface

Android examples for User Interface:View Find

  1. HOME
  2. Android
  3. User Interface
  4. View Find

Description

Given a view, finds recursively a view with the point inside and which have ID

Demo Code


//package com.java2s;
import android.graphics.Point;
import android.view.View;
import android.view.ViewGroup;

public class Main {
    /**// w w  w .  ja v  a 2s .  com
     * Given a view, finds recursively a view with the point inside and which have ID
     * @param p - coordinates of point 
     * @param v - view object to start search
     * @return the view which meets these conditions, null otherwise
     */
    public static View findViewWithIdBelowPoint(Point p, View v) {
        if (v.getVisibility() != View.VISIBLE)
            return null;
        if (!isPointInsideView(p, v))
            return null;
        if (!(v instanceof ViewGroup)) {
            if (v.getId() != View.NO_ID)
                return v;
            return null;
        }

        // is a ViewGroup, iterate children
        ViewGroup vg = (ViewGroup) v;

        int childCount = vg.getChildCount();

        for (int i = 0; i < childCount; i++) {
            View result = findViewWithIdBelowPoint(p, vg.getChildAt(i));
            if (result != null)
                return result;
        }

        return null;
    }

    /**
     * Determines if given point is inside view
     * @param p - coordinates of point 
     * @param view - view object to compare
     * @return true if the point is within view bounds, false otherwise
     */
    public static boolean isPointInsideView(Point p, View view) {
        if (view == null)
            return false;

        int[] location = new int[2];

        view.getLocationOnScreen(location);

        if (p.x < location[0] || p.y < location[1])
            return false;

        if (location[0] + view.getWidth() < p.x
                || location[1] + view.getHeight() < p.y)
            return false;

        return true;
    }
}

Related Tutorials