Android实现随机圆形云标签效果

本文实例为大家分享了Android实现圆形云标签效果展示的具体代码，供大家参考，具体内容如下

下面是实现的效果图：

这个适合用于选择 用户的一些兴趣标签，个性名片等。

代码：

Activity

package com.dyl.cloudtags;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Random;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

private KeywordsFlow keywordsFlow;
private String[] keywords;
public static final String SEARCH_HISTORY = "search_history";
private ArrayList<SearchDataPojo> searchItem;
private String longhistory;
private SharedPreferences sp;
private ArrayList<String> history;
private EditText world_shopping_search_input;
private TextView world_city_refresh, clear_history;
private ImageView toSearch;

@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 initView();
 initSearchHistory();
 refreshTags();
}

private void initView() {
 world_shopping_search_input = (EditText) findViewById(R.id.world_shopping_search_input);
 keywordsFlow = (KeywordsFlow) findViewById(R.id.keywordsflow);

world_city_refresh = (TextView) findViewById(R.id.world_city_refresh);
 world_city_refresh.setOnClickListener(new OnClickListener() {

@Override
  public void onClick(View arg0) {
   refreshTags();
  }
 });

clear_history = (TextView) findViewById(R.id.clear_history);
 clear_history.setOnClickListener(new OnClickListener() {

@Override
  public void onClick(View arg0) {
   clearSearchHistory();
  }
 });

toSearch = (ImageView) findViewById(R.id.toSearch);
 toSearch.setOnClickListener(new OnClickListener() {

@Override
  public void onClick(View arg0) {
   saveSearchHistory();
   refreshTags();
  }
 });
}

private void refreshTags() {
 initSearchHistory();
 keywordsFlow.setDuration(800l);
 keywordsFlow.setOnItemClickListener(new OnClickListener() {

@Override
  public void onClick(View v) {
   String keyword = ((TextView) v).getText().toString();// 获得点击的标签
   world_shopping_search_input.setText(keyword);
  }
 });
 // 添加
 feedKeywordsFlow(keywordsFlow, keywords);
 keywordsFlow.go2Show(KeywordsFlow.ANIMATION_IN);
}

private static void feedKeywordsFlow(KeywordsFlow keywordsFlow, String[] arr) {
 Random random = new Random();
 for (int i = 0; i < KeywordsFlow.MAX; i++) {
  int ran = random.nextInt(arr.length);
  String tmp = arr[ran];
  keywordsFlow.feedKeyword(tmp);
 }
}

/**
 * 读取历史搜索记录
 */
private void initSearchHistory() {
 sp = getSharedPreferences(MainActivity.SEARCH_HISTORY, 0);
 longhistory = sp.getString(MainActivity.SEARCH_HISTORY, "");
 if (!longhistory.equals("")) {
  keywords = longhistory.split(",");
  searchItem = new ArrayList<SearchDataPojo>();
  for (int i = 0; i < keywords.length; i++) {
   searchItem.add(new SearchDataPojo().setContent(keywords[i]));
  }
 } else {// 如果SharedPreferences没有值得话，就显示默认的数据
  keywords = new String[] { "口味虾", "牛蛙", "火锅", "真功夫", "料理",
    "密室逃", "天成房", "波比艾" };
 }
}

/*
 * 保存搜索记录
 */
private void saveSearchHistory() {
 String text = world_shopping_search_input.getText().toString().trim();
 Toast.makeText(this, text, Toast.LENGTH_LONG).show();
 if (!text.equals("") && text != null) {
  if (text.length() < 1) {
   return;
  }
  sp = getSharedPreferences(SEARCH_HISTORY, 0);
  String longhistory = sp.getString(SEARCH_HISTORY, "");
  String[] tmpHistory = longhistory.split(",");
  history = new ArrayList<String>(Arrays.asList(tmpHistory));
  if (history.size() > 0) {
   int i;
   for (i = 0; i < history.size(); i++) {
    if (text.equals(history.get(i))) {
     history.remove(i);
     break;
    }
   }
   history.add(0, text);
  }
  if (history.size() > 0) {
   StringBuilder sb = new StringBuilder();
   for (int i = 0; i < history.size(); i++) {
    sb.append(history.get(i) + ",");
   }
   sp.edit().putString(SEARCH_HISTORY, sb.toString()).commit();
  } else {
   sp.edit().putString(SEARCH_HISTORY, text + ",").commit();
  }
  clear_history.setVisibility(View.VISIBLE);
 }
}

// 清除历史数据
private void clearSearchHistory() {
 searchItem.removeAll(searchItem);
 sp.edit().clear().commit();
 Toast.makeText(this, "清除历史记录", Toast.LENGTH_LONG).show();
}
}

用于将控件设置为圆形的自定义TextView

package com.dyl.cloudtags;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.util.AttributeSet;
import android.widget.TextView;

public class CircleView extends TextView {

private Paint mBgPaint = new Paint();

PaintFlagsDrawFilter pfd = new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG);

public CircleView(Context context, AttributeSet attrs, int defStyle) {
 super(context, attrs, defStyle);
 // TODO Auto-generated constructor stub
}

public CircleView(Context context, AttributeSet attrs) {
 super(context, attrs);
 // TODO Auto-generated constructor stub
 mBgPaint.setColor(Color.WHITE);
 mBgPaint.setAntiAlias(true);
}

public CircleView(Context context) {
 super(context);
 // TODO Auto-generated constructor stub
 mBgPaint.setColor(Color.WHITE);
 mBgPaint.setAntiAlias(true);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 // TODO Auto-generated method stub
 super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 int measuredWidth = getMeasuredWidth();
 int measuredHeight = getMeasuredHeight();
 int max = Math.max(measuredWidth, measuredHeight);
 setMeasuredDimension(max, max);
}

@Override
public void setBackgroundColor(int color) {
 // TODO Auto-generated method stub
 mBgPaint.setColor(color);
}

/**
 * 设置通知个数显示
 * @param text
 */
public void setNotifiText(int text){
 //  if(text>99){
 //   String string = 99+"+";
 //   setText(string);
 //   return;
 //  }
 setText(text+"");
}

@Override
public void draw(Canvas canvas) {
 // TODO Auto-generated method stub
 canvas.setDrawFilter(pfd);
 canvas.drawCircle(getWidth()/2, getHeight()/2, Math.max(getWidth(), getHeight())/2, mBgPaint);
 super.draw(canvas);
}
}

自定义布局用于动态生成多个控件 核心类

package com.dyl.cloudtags;

import java.util.LinkedList;
import java.util.Random;
import java.util.Vector;
import android.content.Context;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.drawable.GradientDrawable;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationSet;
import android.view.animation.AnimationUtils;
import android.view.animation.Interpolator;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.FrameLayout;

public class KeywordsFlow extends FrameLayout implements OnGlobalLayoutListener {

public static final int IDX_X = 0;
public static final int IDX_Y = 1;
public static final int IDX_TXT_LENGTH = 2;
public static final int IDX_DIS_Y = 3;
/** 由外至内的动画。 */
public static final int ANIMATION_IN = 1;
/** 由内至外的动画。 */
public static final int ANIMATION_OUT = 2;
/** 位移动画类型：从外围移动到坐标点。 */
public static final int OUTSIDE_TO_LOCATION = 1;
/** 位移动画类型：从坐标点移动到外围。 */
public static final int LOCATION_TO_OUTSIDE = 2;
/** 位移动画类型：从中心点移动到坐标点。 */
public static final int CENTER_TO_LOCATION = 3;
/** 位移动画类型：从坐标点移动到中心点。 */
public static final int LOCATION_TO_CENTER = 4;
public static final long ANIM_DURATION = 800l;
public static final int MAX = 12;
public static final int TEXT_SIZE_MAX = 20;
public static final int TEXT_SIZE_MIN = 10;
private OnClickListener itemClickListener;
private static Interpolator interpolator;
private static AlphaAnimation animAlpha2Opaque;
private static AlphaAnimation animAlpha2Transparent;
private static ScaleAnimation animScaleLarge2Normal, animScaleNormal2Large,
  animScaleZero2Normal, animScaleNormal2Zero;
/** 存储显示的关键字。 */
private Vector<String> vecKeywords;
private int width, height;
/**
 * go2Show()中被赋值为true，标识开发人员触发其开始动画显示。<br/>
 * 本标识的作用是防止在填充keywrods未完成的过程中获取到width和height后提前启动动画。<br/>
 * 在show()方法中其被赋值为false。<br/>
 * 真正能够动画显示的另一必要条件：width 和 height不为0。<br/>
 */
private boolean enableShow;
private Random random;

private int txtAnimInType, txtAnimOutType;
/** 最近一次启动动画显示的时间。 */
private long lastStartAnimationTime;
/** 动画运行时间。 */
private long animDuration;
private Context context;
public KeywordsFlow(Context context) {
 super(context);
 init();
}

public KeywordsFlow(Context context, AttributeSet attrs) {
 super(context, attrs);
 init();
}

public KeywordsFlow(Context context, AttributeSet attrs, int defStyle) {
 super(context, attrs, defStyle);
 init();
}

private void init() {
 lastStartAnimationTime = 0l;
 animDuration = ANIM_DURATION;
 random = new Random();
 vecKeywords = new Vector<String>(MAX);
 getViewTreeObserver().addOnGlobalLayoutListener(this);
 interpolator = AnimationUtils.loadInterpolator(getContext(),
   android.R.anim.decelerate_interpolator);
 animAlpha2Opaque = new AlphaAnimation(0.0f, 1.0f);
 animAlpha2Transparent = new AlphaAnimation(1.0f, 0.0f);
 animScaleLarge2Normal = new ScaleAnimation(2, 1, 2, 1);
 animScaleNormal2Large = new ScaleAnimation(1, 2, 1, 2);
 animScaleZero2Normal = new ScaleAnimation(0, 1, 0, 1);
 animScaleNormal2Zero = new ScaleAnimation(1, 0, 1, 0);
}

public long getDuration() {
 return animDuration;
}

public void setDuration(long duration) {
 animDuration = duration;
}

public boolean feedKeyword(String keyword) {
 boolean result = false;
 if (vecKeywords.size() < MAX) {
  result = vecKeywords.add(keyword);
 }
 return result;
}

/**
 * 开始动画显示。<br/>
 * 之前已经存在的TextView将会显示退出动画。<br/>
 *
 * @return 正常显示动画返回true；反之为false。返回false原因如下：<br/>
 *   1.时间上不允许，受lastStartAnimationTime的制约；<br/>
 *   2.未获取到width和height的值。<br/>
 */
public boolean go2Show(int animType) {
 if (System.currentTimeMillis() - lastStartAnimationTime > animDuration) {
  enableShow = true;
  if (animType == ANIMATION_IN) {
   txtAnimInType = OUTSIDE_TO_LOCATION;
   txtAnimOutType = LOCATION_TO_CENTER;
  } else if (animType == ANIMATION_OUT) {
   txtAnimInType = CENTER_TO_LOCATION;
   txtAnimOutType = LOCATION_TO_OUTSIDE;
  }
  disapper();
  boolean result = show();
  return result;
 }
 return false;
}

private void disapper() {
 int size = getChildCount();
 for (int i = size - 1; i >= 0; i--) {
  final CircleView txv = (CircleView) getChildAt(i);
  if (txv.getVisibility() == View.GONE) {
   removeView(txv);
   continue;
  }
  FrameLayout.LayoutParams layParams = (LayoutParams) txv
    .getLayoutParams();
  int[] xy = new int[] { layParams.leftMargin, layParams.topMargin,
    txv.getWidth() };
  AnimationSet animSet = getAnimationSet(xy, (width >> 1),
    (height >> 1), txtAnimOutType);
  txv.startAnimation(animSet);
  animSet.setAnimationListener(new AnimationListener() {
   public void onAnimationStart(Animation animation) {
   }

public void onAnimationRepeat(Animation animation) {
   }

public void onAnimationEnd(Animation animation) {
    txv.setOnClickListener(null);
    txv.setClickable(false);
    txv.setVisibility(View.GONE);
   }
  });
 }
}

private boolean show() {
 if (width > 0 && height > 0 && vecKeywords != null
   && vecKeywords.size() > 0 && enableShow) {
  enableShow = false;
  lastStartAnimationTime = System.currentTimeMillis();
  int xCenter = width >> 1, yCenter = height >> 1;
  int size = vecKeywords.size();
  int xItem = width / size, yItem = height / size;
  LinkedList<Integer> listX = new LinkedList<Integer>(), listY = new LinkedList<Integer>();
  for (int i = 0; i < size; i++) {
   // 准备随机候选数，分别对应x/y轴位置
   listX.add(i * xItem);
   listY.add(i * yItem + (yItem >> 2));
  }
  LinkedList<CircleView> listTxtTop = new LinkedList<CircleView>();
  LinkedList<CircleView> listTxtBottom = new LinkedList<CircleView>();
  for (int i = 0; i < size; i++) {
   String keyword = vecKeywords.get(i);
   // 随机位置，糙值
   int xy[] = randomXY(random, listX, listY, xItem);
   // 实例化TextView
   final CircleView txv = new CircleView(getContext());
   txv.setBackgroundResource(R.drawable.text_view_border);
   txv.setGravity(Gravity.CENTER);
   txv.setOnClickListener(itemClickListener);
   txv.setText(keyword);
   txv.setTextColor(Color.WHITE);
   txv.setPadding(8, 6, 8, 6);
   txv.setSingleLine(true);
   int r = random.nextInt(256);
   int g= random.nextInt(256);
   int b = random.nextInt(256);
   int mColor = Color.rgb(r, g, b);
   GradientDrawable myGrad = (GradientDrawable)txv.getBackground();
   myGrad.setColor(mColor);
//    txv.setBackgroundColor(mColor);
   // 获取文本长度
   Paint paint = txv.getPaint();
   int strWidth = (int) Math.ceil(paint.measureText(keyword));
   xy[IDX_TXT_LENGTH] = strWidth;
   // 第一次修正:修正x坐标
   if (xy[IDX_X] + strWidth > width - (xItem >> 1)) {
    int baseX = width - strWidth;
    // 减少文本右边缘一样的概率
    xy[IDX_X] = baseX - xItem + random.nextInt(xItem >> 1);
   } else if (xy[IDX_X] == 0) {
    // 减少文本左边缘一样的概率
    xy[IDX_X] = Math.max(random.nextInt(xItem), xItem / 3);
   }
   xy[IDX_DIS_Y] = Math.abs(xy[IDX_Y] - yCenter);
   txv.setTag(xy);
   if (xy[IDX_Y] > yCenter) {
    listTxtBottom.add(txv);
   } else {
    listTxtTop.add(txv);
   }
  }
  attach2Screen(listTxtTop, xCenter, yCenter, yItem);
  attach2Screen(listTxtBottom, xCenter, yCenter, yItem);
  return true;
 }
 return false;
}

/** 修正TextView的Y坐标将将其添加到容器上。 */
private void attach2Screen(LinkedList<CircleView> listTxt, int xCenter,
  int yCenter, int yItem) {
 int size = listTxt.size();
 sortXYList(listTxt, size);
 for (int i = 0; i < size; i++) {
  CircleView txv = listTxt.get(i);
  int[] iXY = (int[]) txv.getTag();
  // 第二次修正:修正y坐标
  int yDistance = iXY[IDX_Y] - yCenter;
  // 对于最靠近中心点的，其值不会大于yItem<br/>
  // 对于可以一路下降到中心点的，则该值也是其应调整的大小<br/>
  int yMove = Math.abs(yDistance);
  inner: for (int k = i - 1; k >= 0; k--) {
   int[] kXY = (int[]) listTxt.get(k).getTag();
   int startX = kXY[IDX_X];
   int endX = startX + kXY[IDX_TXT_LENGTH];
   // y轴以中心点为分隔线，在同一侧
   if (yDistance * (kXY[IDX_Y] - yCenter) > 0) {
    if (isXMixed(startX, endX, iXY[IDX_X], iXY[IDX_X]
      + iXY[IDX_TXT_LENGTH])) {
     int tmpMove = Math.abs(iXY[IDX_Y] - kXY[IDX_Y]);
     if (tmpMove > yItem) {
      yMove = tmpMove;
     } else if (yMove > 0) {
      // 取消默认值。
      yMove = 0;
     }
     break inner;
    }
   }
  }
  if (yMove > yItem) {
   int maxMove = yMove - yItem;
   int randomMove = random.nextInt(maxMove);
   int realMove = Math.max(randomMove, maxMove >> 1) * yDistance
     / Math.abs(yDistance);
   iXY[IDX_Y] = iXY[IDX_Y] - realMove;
   iXY[IDX_DIS_Y] = Math.abs(iXY[IDX_Y] - yCenter);
   // 已经调整过前i个需要再次排序
   sortXYList(listTxt, i + 1);
  }
  FrameLayout.LayoutParams layParams = new FrameLayout.LayoutParams(
    FrameLayout.LayoutParams.WRAP_CONTENT,
    FrameLayout.LayoutParams.WRAP_CONTENT);
  layParams.gravity = Gravity.LEFT | Gravity.TOP;
  layParams.leftMargin = iXY[IDX_X];
  layParams.topMargin = iXY[IDX_Y];
  addView(txv, layParams);
  // 动画
  AnimationSet animSet = getAnimationSet(iXY, xCenter, yCenter,
    txtAnimInType);
  txv.startAnimation(animSet);
 }
}

public AnimationSet getAnimationSet(int[] xy, int xCenter, int yCenter,
  int type) {
 AnimationSet animSet = new AnimationSet(true);
 animSet.setInterpolator(interpolator);
 if (type == OUTSIDE_TO_LOCATION) {
  animSet.addAnimation(animAlpha2Opaque);
  animSet.addAnimation(animScaleLarge2Normal);
  TranslateAnimation translate = new TranslateAnimation((xy[IDX_X]
    + (xy[IDX_TXT_LENGTH] >> 1) - xCenter) << 1, 0,
    (xy[IDX_Y] - yCenter) << 1, 0);
  animSet.addAnimation(translate);
 } else if (type == LOCATION_TO_OUTSIDE) {
  animSet.addAnimation(animAlpha2Transparent);
  animSet.addAnimation(animScaleNormal2Large);
  TranslateAnimation translate = new TranslateAnimation(0, (xy[IDX_X]
    + (xy[IDX_TXT_LENGTH] >> 1) - xCenter) << 1, 0,
    (xy[IDX_Y] - yCenter) << 1);
  animSet.addAnimation(translate);
 } else if (type == LOCATION_TO_CENTER) {
  animSet.addAnimation(animAlpha2Transparent);
  animSet.addAnimation(animScaleNormal2Zero);
  TranslateAnimation translate = new TranslateAnimation(0,
    (-xy[IDX_X] + xCenter), 0, (-xy[IDX_Y] + yCenter));
  animSet.addAnimation(translate);
 } else if (type == CENTER_TO_LOCATION) {
  animSet.addAnimation(animAlpha2Opaque);
  animSet.addAnimation(animScaleZero2Normal);
  TranslateAnimation translate = new TranslateAnimation(
    (-xy[IDX_X] + xCenter), 0, (-xy[IDX_Y] + yCenter), 0);
  animSet.addAnimation(translate);
 }
 animSet.setDuration(animDuration);
 return animSet;
}

/**
 * 根据与中心点的距离由近到远进行冒泡排序。
 *
 * @param endIdx
 *   起始位置。
 * @param txtArr
 *   待排序的数组。
 *
 */
private void sortXYList(LinkedList<CircleView> listTxt, int endIdx) {
 for (int i = 0; i < endIdx; i++) {
  for (int k = i + 1; k < endIdx; k++) {
   if (((int[]) listTxt.get(k).getTag())[IDX_DIS_Y] < ((int[]) listTxt
     .get(i).getTag())[IDX_DIS_Y]) {
    CircleView iTmp = listTxt.get(i);
    CircleView kTmp = listTxt.get(k);
    listTxt.set(i, kTmp);
    listTxt.set(k, iTmp);
   }
  }
 }
}

/** A线段与B线段所代表的直线在X轴映射上是否有交集。 */
private boolean isXMixed(int startA, int endA, int startB, int endB) {
 boolean result = false;
 if (startB >= startA && startB <= endA) {
  result = true;
 } else if (endB >= startA && endB <= endA) {
  result = true;
 } else if (startA >= startB && startA <= endB) {
  result = true;
 } else if (endA >= startB && endA <= endB) {
  result = true;
 }
 return result;
}

//得到随机坐标
private int[] randomXY(Random ran, LinkedList<Integer> listX,
  LinkedList<Integer> listY, int xItem) {
 int[] arr = new int[4];
 arr[IDX_X] = listX.remove(ran.nextInt(listX.size()));
 arr[IDX_Y] = listY.remove(ran.nextInt(listY.size()));
 return arr;
}

public void onGlobalLayout() {
 int tmpW = getWidth();
 int tmpH = getHeight();
 if (width != tmpW || height != tmpH) {
  width = tmpW;
  height = tmpH;
  show();
 }
}

public Vector<String> getKeywords() {
 return vecKeywords;
}

public void rubKeywords() {
 vecKeywords.clear();
}

/** 直接清除所有的TextView。在清除之前不会显示动画。 */
public void rubAllViews() {
 removeAllViews();
}

public void setOnItemClickListener(OnClickListener listener) {
 itemClickListener = listener;
}
}

package com.dyl.cloudtags;

/**
* 搜索记录
* @author dengyalan
*
*/
public class SearchDataPojo {

private String content = "";

public String getContent() {
 return content;
}

public SearchDataPojo setContent(String content) {
 this.content = content;
 return this;
}
}

源码下载：Android实现圆形云标签效果

来源：https://blog.csdn.net/shaoyezhangliwei/article/details/49281619