Get the location of a view. - Android User Interface

Android examples for User Interface:View Position

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

Description

Get the location of a view.

Demo Code

/*/*from   w w  w .  j av  a2s.  c o  m*/
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;

import android.view.Gravity;

import android.view.View;

public class Main {
    /**
     * Get the location of a view. Use the gravity param to specify which part of the view to
     * return.
     * 
     * @param v View to find
     * @param gravity A combination of (TOP, CENTER_VERTICAL, BOTTOM) and (LEFT, CENTER_HORIZONTAL,
     *        RIGHT)
     * @param xy Result
     */
    private static void getStartLocation(View v, int gravity, int[] xy) {
        v.getLocationOnScreen(xy);

        final int viewWidth = v.getWidth();
        final int viewHeight = v.getHeight();

        switch (gravity & Gravity.VERTICAL_GRAVITY_MASK) {
        case Gravity.TOP:
            break;
        case Gravity.CENTER_VERTICAL:
            xy[1] += viewHeight / 2;
            break;
        case Gravity.BOTTOM:
            xy[1] += viewHeight - 1;
            break;
        default:
            // Same as top -- do nothing
        }

        switch (gravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
        case Gravity.LEFT:
            break;
        case Gravity.CENTER_HORIZONTAL:
            xy[0] += viewWidth / 2;
            break;
        case Gravity.RIGHT:
            xy[0] += viewWidth - 1;
            break;
        default:
            // Same as left -- do nothing
        }
    }
}

Related Tutorials