地球仪式分布的控件,球体控件

效果:

本人爱好做android各种好玩的效果和交互，欢迎大家交流。

引用大神的成果
http://www.open-open.com/lib/view/open1455706317480.html

原来的效果是这样的

虽然我添加了3D翻转，还有光照背景，看起来华丽，但其实不知道在什么地方用得上。又修改了代码，添加了滑动停止后，自动锁定最靠近中央的item，作为一个选择菜单使用，跟日期选择控件有点类似。
给这个控件的每个item添加触发点击事件，应该是不太需要的吧。
毕竟，每个都要点击，然后触发比如查看大图之类，还不如用最直观的gridview呢。

代码:
从大神的工程的基础上重构了实体类Tag.java的一些属性名字，比如用简单的x,y,z表示子控件的3d空间坐标

public class Tag {

    private int popularity;  //this is the importance/popularity of the Tag
    public float x, y, z; //the center of the 3D Tag
    private float loc2DX, loc2DY;
    private float scale;
    private float[] argb;
    private static final int DEFAULT_POPULARITY = 5;

修改了TagCloudView.java。

去掉onLayout方法，改沿用继承FrameLayout了，修改updateChild方法，view的位置，大小，透明度，X，Y旋转计算直接完成，然后invalidate()重新绘制。
修改onTouchEvent，不再根据触摸点离中心有多远，而是根据手指滑动距离，决定X，Y方向的角度偏转

修改对惯性摩擦阻力的一些参数（run方法），由于修改了角度偏转方法，如果还按原来的参数，则阻力太小，根本停不下来

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.os.Handler;
import android.os.Looper;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver;
import android.widget.FrameLayout;

import com.dxtx.common.R;


/**
 * Copyright © 2016 moxun
 * <p/>
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the “Software”),
 * to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * <p/>
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * <p/>
 * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
 * OR OTHER DEALINGS IN THE SOFTWARE.
 */


public class TagCloudView extends FrameLayout implements Runnable, TagsAdapter.OnDataSetChangeListener {
   
    //    private final float TOUCH_SCALE_FACTOR = .8f;
    private final float TOUCH_SCALE_FACTOR = 12f;
    private final float TRACKBALL_SCALE_FACTOR = 10;
    private float tspeed = 2f;
    private TagCloud mTagCloud;
    private float mAngleX = 0.5f;
    private float mAngleY = 0.5f;
    private float centerX, centerY;
    private float radius;
    private float radiusPercent = 0.9f;

    private float[] darkColor = new float[]{
  1f, 0f, 0f, 1};
    private float[] lightColor = new float[]{
  0.9412f, 0.7686f, 0.2f, 1};
    private int sphereColor = Color.WHITE;

    private State touch_state = State.Scroll;
    private Tag selectTag;
    private int selectIndex;

    private float minLockError;

    private enum State {
        Touch, Calm, AutoLock, Scroll
    }

    private boolean autoSelect = false;

    private Handler handler = new Handler(Looper.getMainLooper());

    private TagsAdapter tagsAdapter;

    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    private Paint glancePaint;
    private RectF glanceRect = new RectF();
    private RectF shadowRect = new RectF();
    private Bitmap glanceBitmap, shadowBitmap;

    public TagCloudView(Context context) {
        super(context);
        setFocusableInTouchMode(true);
        init(context, null);
    }

    public TagCloudView(Context context, AttributeSet attrs) {
        super(context, attrs);
        setFocusableInTouchMode(true);
        init(context, attrs);
    }

    public TagCloudView(Context context, AttributeSet attrs, int defStyleAttr) {