Android实现3D云标签效果

public class TagCloudView extends RelativeLayout { 
RelativeLayout navigation_bar; 
TextView mTextView1; 
private final float TOUCH_SCALE_FACTOR = .8f; 
private float tspeed; 
private TagCloud mTagCloud; 
private float mAngleX =0; 
private float mAngleY =0; 
private float centerX, centerY; 
private float radius; 
private Context mContext; 
private List<TextView  mTextView; 
private List<RelativeLayout.LayoutParams  mParams; 
private int shiftLeft; 
float dowx = 0; 
float dowy = 0; 
float cutx=100; 
float cuty=100; 
public TagCloudView(Context mContext, int width, int height, List<Tag  tagList) { 
this(mContext, width, height, tagList, 6 , 34, 1); 
} 
public TagCloudView(Context mContext, int width, int height, List<Tag  tagList, 
int textSizeMin, int textSizeMax, int scrollSpeed) { 
super(mContext); 
this.mContext= mContext; 
tspeed = scrollSpeed; 
centerX = width / 2; 
centerY = height / 2; 
radius = Math.min(centerX * 0.95f , centerY * 0.95f ); 
shiftLeft = (int)(Math.min(centerX * 0.15f , centerY * 0.15f )); 
mTagCloud = new TagCloud(tagList, (int) radius , textSizeMin, textSizeMax); 
float[] tempColor1 = {0.9412f,0.7686f,0.2f,1}; //rgb Alpha 
//{1f,0f,0f,1} red  {0.3882f,0.21568f,0.0f,1} orange 
//{0.9412f,0.7686f,0.2f,1} light orange 
float[] tempColor2 = {1f,0f,0f,1}; //rgb Alpha 
//{0f,0f,1f,1} blue  {0.1294f,0.1294f,0.1294f,1} grey 
//{0.9412f,0.7686f,0.2f,1} light orange 
mTagCloud.setTagColor1(tempColor1);//higher color 
mTagCloud.setTagColor2(tempColor2);//lower color 
mTagCloud.setRadius((int) radius); 
mTagCloud.create(true); 
mTagCloud.setAngleX(mAngleX); 
mTagCloud.setAngleY(mAngleY); 
mTagCloud.update(); 
mTextView = new ArrayList<TextView (); 
mParams = new ArrayList<RelativeLayout.LayoutParams (); 
Iterator<?  it=mTagCloud.iterator(); 
Tag tempTag; 
int i=0; 
//取出每个数据放到TexView里 
while (it.hasNext()){ 
tempTag= (Tag) it.next();    
tempTag.setParamNo(i); 
mTextView.add(new TextView(this.mContext)); 
mTextView.get(i).setText(tempTag.getText()); 
mParams.add(new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); 
mParams.get(i).addRule(RelativeLayout.ALIGN_PARENT_LEFT); 
mParams.get(i).addRule(RelativeLayout.ALIGN_PARENT_TOP); 
mParams.get(i).setMargins((int) (centerX -shiftLeft + tempTag.getLoc2DX()),(int) (centerY + tempTag.getLoc2DY()),0,0); 
mTextView.get(i).setLayoutParams(mParams.get(i)); 
mTextView.get(i).setSingleLine(true); 
int mergedColor = Color.argb((int)(tempTag.getAlpha() * 255), (int) (tempTag.getColorR() * 255), (int) (tempTag.getColorG() * 255),(int) (tempTag.getColorB() * 255)); 
mTextView.get(i).setTextColor(mergedColor); 
mTextView.get(i).setTextSize((int)(tempTag.getTextSize() * tempTag.getScale())); 
addView(mTextView.get(i)); 
mTextView.get(i).setOnClickListener(OnTagClickListener(tempTag.getUrl())); 
//设置每个TexView有自己指定的标签为自己的位置，以便后期操作 
mTextView.get(i).setTag(i); 
i++; 
} 
/** 用来自动播放的*/ 
new Timer().schedule(new TimerTask() { 
@Override 
public void run() { 
handler.sendEmptyMessage(1); 
} 
}, 0,200); 
} 
@SuppressLint("HandlerLeak") 
Handler handler=new Handler(){ 
@Override 
public void handleMessage(Message msg) { 
super.handleMessage(msg); 
mAngleX = (cuty/radius) *tspeed * TOUCH_SCALE_FACTOR; 
mAngleY = (-cutx/radius) *tspeed * TOUCH_SCALE_FACTOR; 
changPosition(); 
} 
}; 
@Override 
protected void onDraw(Canvas canvas){ 
super.onDraw(canvas); 
} 
/** 
* 触发事件 
*/ 
@Override 
public boolean onTouchEvent(MotionEvent e) { 
switch (e.getAction()) { 
case MotionEvent.ACTION_DOWN: 
dowx=e.getX(); 
dowy=e.getY(); 
break; 
case MotionEvent.ACTION_UP: 
float upx=e.getX(); 
float upy=e.getY(); 
cutx=upx-dowx; 
cuty=upy-dowy; 
break; 
case MotionEvent.ACTION_MOVE:  
mAngleX = (cuty/radius) *tspeed * TOUCH_SCALE_FACTOR; 
mAngleY = (-cutx/radius) *tspeed * TOUCH_SCALE_FACTOR; 
changPosition(); 
break; 
} 
return true; 
} 
/** 
* 改变位置 
*/ 
private void changPosition(){ 
mTagCloud.setAngleX(mAngleX); 
mTagCloud.setAngleY(mAngleY); 
mTagCloud.update(); 
Iterator<?  it=mTagCloud.iterator(); 
Tag tempTag; 
while (it.hasNext()){ 
tempTag= (Tag) it.next();    
mParams.get(tempTag.getParamNo()).setMargins(  
(int) (centerX -shiftLeft + tempTag.getLoc2DX()), 
(int) (centerY + tempTag.getLoc2DY()), 
0, 
0); 
mTextView.get(tempTag.getParamNo()).setTextSize((int)(tempTag.getTextSize() * tempTag.getScale())); 
int mergedColor = Color.argb( (int) (tempTag.getAlpha() * 255), 
(int) (tempTag.getColorR() * 255), 
(int) (tempTag.getColorG() * 255), 
(int) (tempTag.getColorB() * 255)); 
mTextView.get(tempTag.getParamNo()).setTextColor(mergedColor); 
mTextView.get(tempTag.getParamNo()).bringToFront(); 
} 
} 
/** 
* 点击事件 
* @param url 
* @return 
*/ 
View.OnClickListener OnTagClickListener(final String url){ 
return new View.OnClickListener(){ 
@Override 
public void onClick(View v) { 
} 
}; 
} 
} 

/** 
* 自定义的迭代器 
* @author Administrator 
* 
*/ 
public class TagCloud implements Iterable<Object { 
private List<Tag  tagCloud; 
private int radius; 
private static final int DEFAULT_RADIUS = 3; 
private static final int TEXT_SIZE_MAX = 30 , TEXT_SIZE_MIN= 4; 
private static final float[] DEFAULT_COLOR1= { 0.886f, 0.725f, 0.188f, 1f}; 
private static final float[] DEFAULT_COLOR2= { 0.3f, 0.3f, 0.3f, 1f}; 
private float[] tagColor1; 
private float[] tagColor2; 
private int textSizeMax, textSizeMin; 
private float sin_mAngleX,cos_mAngleX,sin_mAngleY,cos_mAngleY,sin_mAngleZ,cos_mAngleZ; 
private float mAngleZ=0; 
private float mAngleX =0; 
private float mAngleY =0; 
private int size=0; 
private int smallest,largest; 
private boolean distrEven = true; 
public TagCloud(){ 
this(new ArrayList<Tag ()); 
} 
public TagCloud(List<Tag  tags){ 
this(tags,DEFAULT_RADIUS); 
} 
public TagCloud(List<Tag  tags, int radius){ 
this( tags, radius, DEFAULT_COLOR1, DEFAULT_COLOR2, TEXT_SIZE_MIN, TEXT_SIZE_MAX); 
} 
public TagCloud(List<Tag  tags, int radius,int textSizeMin, int textSizeMax){ 
this( tags, radius, DEFAULT_COLOR1, DEFAULT_COLOR2, textSizeMin, textSizeMax); 
} 
public TagCloud(List<Tag  tags, int radius,float[] tagColor1, float[] tagColor2){ 
this( tags, radius, tagColor1, tagColor2, TEXT_SIZE_MIN, TEXT_SIZE_MAX); 
}   
public TagCloud(List<Tag  tags, int radius, float[] tagColor1, float[] tagColor2, 
int textSizeMin, int textSizeMax){ 
this.tagCloud=tags;  
this.radius = radius; 
this.tagColor1 = tagColor1; 
this.tagColor2 = tagColor2; 
this.textSizeMax = textSizeMax; 
this.textSizeMin = textSizeMin; 
} 
/** 
* 重写的方法 
*/ 
@Override 
public Iterator iterator() { 
return tagCloud.iterator(); 
} 
/** 
* 创建 
* @param distrEven 
*/ 
public void create(boolean distrEven){ 
this.distrEven =distrEven; 
positionAll(distrEven); 
sineCosine( mAngleX, mAngleY, mAngleZ); 
updateAll(); 
smallest = 9999; 
largest = 0; 
for (int i=0; i< tagCloud.size(); i++){ 
int j = tagCloud.get(i).getPopularity(); 
largest = Math.max(largest, j); 
smallest = Math.min(smallest, j); 
} 
Tag tempTag; 
for (int i=0; i< tagCloud.size(); i++){ 
tempTag = tagCloud.get(i); 
int j = tempTag.getPopularity(); 
float percentage = ( smallest == largest ) ? 1.0f : ((float)j-smallest) / ((float)largest-smallest); 
float[] tempColor = getColorFromGradient( percentage ); //(rgb Alpha) 
int tempTextSize = getTextSizeGradient( percentage ); 
tempTag.setColorR(tempColor[0]); 
tempTag.setColorG(tempColor[1]); 
tempTag.setColorB(tempColor[2]); 
tempTag.setTextSize(tempTextSize); 
}   
this.size= tagCloud.size(); 
} 
/** 
* create创建完，就需要update 
*/ 
public void update(){ 
if( Math.abs(mAngleX)   .1 || Math.abs(mAngleY)   .1 ){ 
sineCosine( mAngleX, mAngleY, mAngleZ); 
updateAll(); 
} 
} 
/** 
* 计算每个Tag的 
* @param distrEven 是否根据字计算位置 true为是，否则字有覆盖的 
*/ 
private void positionAll(boolean distrEven){ 
double phi = 0; 
double theta = 0; 
int max = tagCloud.size(); 
for (int i=1; i<max+1; i++){ 
if (distrEven){ 
phi = Math.acos(-1.0 + (2.0*i -1.0)/max); 
theta = Math.sqrt(max*Math.PI) * phi; 
} else{ 
phi = Math.random()*(Math.PI); 
theta = Math.random()*(2 * Math.PI); 
} 
tagCloud.get(i-1).setLocX((int)( (radius * Math.cos(theta) * Math.sin(phi)))); 
tagCloud.get(i-1).setLocY((int)(radius * Math.sin(theta) * Math.sin(phi))); 
tagCloud.get(i-1).setLocZ((int)(radius * Math.cos(phi))); 
}   
}  
/** 
* 更新所有的Tag位置 
*/ 
private void updateAll(){ 
int max = tagCloud.size(); 
for (int j=0; j<max; j++){ 
float rx1 = (tagCloud.get(j).getLocX()); 
float ry1 = (tagCloud.get(j).getLocY()) * cos_mAngleX + 
tagCloud.get(j).getLocZ() * -sin_mAngleX; 
float rz1 = (tagCloud.get(j).getLocY()) * sin_mAngleX + 
tagCloud.get(j).getLocZ() * cos_mAngleX;       
float rx2 = rx1 * cos_mAngleY + rz1 * sin_mAngleY; 
float ry2 = ry1; 
float rz2 = rx1 * -sin_mAngleY + rz1 * cos_mAngleY; 
float rx3 = rx2 * cos_mAngleZ + ry2 * -sin_mAngleZ; 
float ry3 = rx2 * sin_mAngleZ + ry2 * cos_mAngleZ; 
float rz3 = rz2; 
tagCloud.get(j).setLocX(rx3); 
tagCloud.get(j).setLocY(ry3); 
tagCloud.get(j).setLocZ(rz3); 
int diameter = 2 * radius; 
float per = diameter / (diameter+rz3); 
tagCloud.get(j).setLoc2DX((int)(rx3 * per)); 
tagCloud.get(j).setLoc2DY((int)(ry3 * per)); 
tagCloud.get(j).setScale(per); 
tagCloud.get(j).setAlpha(per / 2); 
}  
//给Tag排序 
Collections.sort(tagCloud);  
}  
/** 
* 计算字体颜色 
* @param perc 
* @return 
*/ 
private float[] getColorFromGradient(float perc){ 
float[] tempRGB = new float[4]; 
tempRGB[0] = ( perc * ( tagColor1[0] ) ) + ( (1-perc) * ( tagColor2[0] ) ); 
tempRGB[1] = ( perc * ( tagColor1[1] ) ) + ( (1-perc) * ( tagColor2[1] ) ); 
tempRGB[2] = ( perc * ( tagColor1[2] ) ) + ( (1-perc) * ( tagColor2[2] ) ); 
tempRGB[3] = 1; 
return tempRGB; 
} 
/** 
* 计算字体的大小 
* @param perc 
* @return 
*/ 
private int getTextSizeGradient(float perc){ 
int size; 
size = (int)( perc*textSizeMax + (1-perc)*textSizeMin ); 
return size; 
} 
/** 
* 计算圆形的x y z坐标 
* @param mAngleX 
* @param mAngleY 
* @param mAngleZ 
*/ 
private void sineCosine(float mAngleX,float mAngleY,float mAngleZ) { 
double degToRad = (Math.PI / 180); 
sin_mAngleX= (float) Math.sin( mAngleX * degToRad); 
cos_mAngleX= (float) Math.cos( mAngleX * degToRad); 
sin_mAngleY= (float) Math.sin( mAngleY * degToRad); 
cos_mAngleY= (float) Math.cos( mAngleY * degToRad); 
sin_mAngleZ= (float) Math.sin( mAngleZ * degToRad); 
cos_mAngleZ= (float) Math.cos( mAngleZ * degToRad); 
} 
/** 
* 以下是get set方法 
* @return 
*/ 
public int getRadius() { 
return radius; 
} 
public void setRadius(int radius) { 
this.radius = radius; 
} 
public float[] getTagColor1() { 
return tagColor1; 
} 
public void setTagColor1(float[] tagColor) { 
this.tagColor1 = tagColor; 
} 
public float[] getTagColor2() { 
return tagColor2; 
} 
public void setTagColor2(float[] tagColor2) { 
this.tagColor2 = tagColor2; 
} 
public float getRvalue(float[] color) { 
if (color.length 0) 
return color[0]; 
else 
return 0; 
} 
public float getGvalue(float[] color) { 
if (color.length 0) 
return color[1]; 
else 
return 0; } 
public float getBvalue(float[] color) { 
if (color.length 0) 
return color[2]; 
else 
return 0; } 
public float getAlphaValue(float[] color) { 
if (color.length  = 4) 
return color[3]; 
else 
return 0;  
}   
public float getAngleX() { 
return mAngleX; 
} 
public void setAngleX(float mAngleX) { 
this.mAngleX = mAngleX; 
} 
public float getAngleY() { 
return mAngleY; 
} 
public void setAngleY(float mAngleY) { 
this.mAngleY = mAngleY; 
} 
public int getSize() { 
return size; 
}  
} 

/** 
* Comparable接口 可以自定义排序方式 
* @author Administrator 
* 
*/ 
public class Tag implements Comparable<Tag { 
private String text, url; 
private int popularity; 
private int textSize; 
private float locX, locY, locZ; 
private float loc2DX, loc2DY; 
private float scale; 
private float colorR, colorG, colorB, alpha; 
private static final int DEFAULT_POPULARITY = 1; 
private int paramNo; 
public Tag(String text, int popularity) { 
this(text, 0f, 0f, 0f, 1.0f, popularity, ""); 
}  
public Tag(String text, int popularity, String url) { 
this(text, 0f, 0f, 0f, 1.0f, popularity, url); 
}  
public Tag(String text,float locX, float locY, float locZ) { 
this(text, locX, locY, locZ, 1.0f, DEFAULT_POPULARITY, ""); 
} 
public Tag(String text,float locX, float locY, float locZ, float scale) { 
this(text, locX, locY, locZ, scale, DEFAULT_POPULARITY, ""); 
} 
public Tag(String text,float locX, float locY, float locZ, float scale, int popularity, 
String url) { 
this.text = text; 
this.locX = locX; 
this.locY = locY; 
this.locZ = locZ; 
this.loc2DX = 0; 
this.loc2DY=0; 
this.colorR= 0.5f; 
this.colorG= 0.5f; 
this.colorB= 0.5f; 
this.alpha = 1.0f; 
this.scale = scale; 
this.popularity= popularity; 
this.url = url; 
}  
@Override 
public int compareTo(Tag another) { 
//排序方式 
return (int)(another.locZ - locZ); 
} 
public float getLocX() { 
return locX; 
} 
public void setLocX(float locX) { 
this.locX = locX; 
} 
public float getLocY() { 
return locY; 
} 
public void setLocY(float locY) { 
this.locY = locY; 
} 
public float getLocZ() { 
return locZ; 
} 
public void setLocZ(float locZ) { 
this.locZ = locZ; 
} 
public float getScale() { 
return scale; 
} 
public void setScale(float scale) { 
this.scale = scale; 
} 
public String getText() { 
return text; 
} 
public void setText(String text) { 
this.text = text; 
} 
public float getColorR() { 
return colorR; 
} 
public void setColorR(float colorR) { 
this.colorR = colorR; 
} 
public float getColorG() { 
return colorG; 
} 
public void setColorG(float colorG) { 
this.colorG = colorG; 
} 
public float getColorB() { 
return colorB; 
} 
public void setColorB(float colorB) { 
this.colorB = colorB; 
} 
public float getAlpha() { 
return alpha; 
} 
public void setAlpha(float alpha) { 
this.alpha = alpha; 
} 
public int getPopularity() { 
return popularity; 
} 
public void setPopularity(int popularity) { 
this.popularity = popularity; 
} 
public int getTextSize() { 
return textSize; 
} 
public void setTextSize(int textSize) { 
this.textSize = textSize; 
} 
public float getLoc2DX() { 
return loc2DX; 
} 
public void setLoc2DX(float loc2dx) { 
loc2DX = loc2dx; 
} 
public float getLoc2DY() { 
return loc2DY; 
} 
public void setLoc2DY(float loc2dy) { 
loc2DY = loc2dy; 
} 
public int getParamNo() { 
return paramNo; 
} 
public void setParamNo(int paramNo) { 
this.paramNo = paramNo; 
} 
public String getUrl() { 
return url; 
} 
public void setUrl(String url) { 
this.url = url; 
} 
} 

private TagCloudView mTagCloudView; 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
WindowManager.LayoutParams.FLAG_FULLSCREEN); 
Display display = getWindowManager().getDefaultDisplay(); 
@SuppressWarnings("deprecation") 
int width = display.getWidth(); 
@SuppressWarnings("deprecation") 
int height = display.getHeight(); 
List<Tag  myTagList= createTags(); 
mTagCloudView = new TagCloudView(this, width, height, myTagList ); 
setContentView(mTagCloudView); 
mTagCloudView.requestFocus(); 
mTagCloudView.setFocusableInTouchMode(true); 
} 
private List<Tag  createTags(){ 
List<Tag  tempList = new ArrayList<Tag (); 
tempList.add(new Tag("Google", 7, "http://www.google.com")); 
tempList.add(new Tag("Yahoo", 3, "www.yahoo.com")); 
tempList.add(new Tag("CNN", 4, "www.cnn.com")); 
tempList.add(new Tag("MSNBC", 5, "www.msnbc.com")); 
tempList.add(new Tag("CNBC", 5, "www.CNBC.com")); 
tempList.add(new Tag("Facebook", 7, "www.facebook.com")); 
tempList.add(new Tag("Youtube", 3, "www.youtube.com")); 
tempList.add(new Tag("BlogSpot", 5, "www.blogspot.com")); 
tempList.add(new Tag("Bing", 3, "www.bing.com")); 
tempList.add(new Tag("Wikipedia", 8, "www.wikipedia.com")); 
tempList.add(new Tag("Twitter", 5, "www.twitter.com")); 
tempList.add(new Tag("Msn", 1, "www.msn.com")); 
tempList.add(new Tag("Amazon", 3, "www.amazon.com")); 
tempList.add(new Tag("Ebay", 7, "www.ebay.com")); 
tempList.add(new Tag("LinkedIn", 5, "www.linkedin.com")); 
tempList.add(new Tag("Live", 7, "www.live.com")); 
tempList.add(new Tag("Microsoft", 3, "www.microsoft.com")); 
tempList.add(new Tag("Flicker", 1, "www.flicker.com")); 
tempList.add(new Tag("Apple", 5, "www.apple.com")); 
tempList.add(new Tag("Paypal", 5, "www.paypal.com")); 
tempList.add(new Tag("Craigslist", 7, "www.craigslist.com")); 
tempList.add(new Tag("Imdb", 2, "www.imdb.com")); 
tempList.add(new Tag("Ask", 4, "www.ask.com")); 
tempList.add(new Tag("Weibo", 1, "www.weibo.com")); 
tempList.add(new Tag("Tagin!", 8, "http://scyp.idrc.ocad.ca/projects/tagin")); 
tempList.add(new Tag("Shiftehfar", 8, "www.shiftehfar.org")); 
tempList.add(new Tag("Soso", 5, "www.google.com")); 
tempList.add(new Tag("XVideos", 3, "www.xvideos.com")); 
tempList.add(new Tag("BBC", 5, "www.bbc.co.uk")); 
return tempList; 
}