android 随机云标签(圆形)

简介: android 随机云标签(圆形)

下面是实现的效果图:

image.png

image.png

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;
  }
}


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