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一直对Animation属于可有可无的不在意。看到个样例，认为在不切换的情况下，适当的应用还真是蛮好看的。

包结构：

一个类一个控件。内容简单。

执行效果：

下方的下方箭头会上下移动，页面内的全部散乱的文字都是TextView，以及搜索和带删除的EditText

主Activity

public class MainActivity extends Activity implements OnClickListener {
          private static final int FEEDKEY_START = 1;    private ImageView back_arrow;    private ImageView search_button;    private Animation shakeAnim;    private DeletableEditText searchEdit;    private KeywordsFlow keywordsFlow;    private int STATE = 1;    //页面滚动的数据源    private static String[] keywords = new String[] { "弗拉基米尔", "希维尔", "蒙多",            "茂凯", "潘森", "波比", "拉克丝", "索拉卡", "娑娜", "伊泽瑞尔", "费德提克", " 雷克顿",            "古拉加斯", "卡萨丁", "迦娜", "奥莉安娜", "嘉文四世", " 莫德凯撒", " 崔丝塔娜", "布兰德",            "卡尔玛", "塔里克", "莫甘娜", "凯南", " 兰博", "斯维因" ,"卡尔萨斯"};    private Handler handler = new Handler() {        public void handleMessage(android.os.Message msg) {            switch (msg.what) {            case FEEDKEY_START:                keywordsFlow.rubKeywords();                feedKeywordsFlow(keywordsFlow, keywords);                keywordsFlow.go2Show(KeywordsFlow.ANIMATION_OUT);                sendEmptyMessageDelayed(FEEDKEY_START, 5000);                break;            }        };    };    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);        }    }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_search);        //载入动画效果        shakeAnim = AnimationUtils.loadAnimation(this, R.anim.shake_y);        initView();    }    private void initView() {        keywordsFlow = (KeywordsFlow) findViewById(R.id.keywordsflow);        keywordsFlow.setDuration(1000l);        keywordsFlow.setOnItemClickListener(this);        back_arrow = (ImageView) findViewById(R.id.back_arrow);        back_arrow.setAnimation(shakeAnim);        searchEdit = (DeletableEditText) findViewById(R.id.search_view);        search_button=(ImageView)findViewById(R.id.search_button);        search_button.setOnClickListener(this);        feedKeywordsFlow(keywordsFlow, keywords);        keywordsFlow.go2Show(KeywordsFlow.ANIMATION_IN);        handler.sendEmptyMessageDelayed(FEEDKEY_START, 5000);    }    @Override    public void onClick(View v) {        if (v instanceof TextView) {            String keyword = ((TextView) v).getText().toString().trim();            searchEdit.setText(keyword);            searchEdit.setSelection(keyword.length());        }        if(v.getId()==R.id.search_button&&searchEdit.getText().toString().length()!=0){            Toast.makeText(MainActivity.this, "你搜索了 "+searchEdit.getText().toString(), Toast.LENGTH_SHORT).show();        }    }    @Override    public void onBackPressed()     {        Intent intent = new Intent(Intent.ACTION_MAIN);        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        intent.addCategory(Intent.CATEGORY_HOME);        startActivity(intent);    }    @Override    protected void onDestroy() {        super.onDestroy();        back_arrow.clearAnimation();        handler.removeMessages(FEEDKEY_START);        STATE = 0;    }    @Override    protected void onStop() {        super.onStop();        handler.removeMessages(FEEDKEY_START);        STATE = 0;    }    @Override    public void onPause() {        super.onPause();        handler.removeMessages(FEEDKEY_START);        STATE = 0;    }    @Override    public void onResume() {        super.onResume();        if (STATE == 0) {            keywordsFlow.rubKeywords();            handler.sendEmptyMessageDelayed(FEEDKEY_START, 3000);        }    }       }

分析：

用handle控制每次动画出现的时间。以及效果排列的算法。

提交按钮之所以不用Button由于 instanceof TextView的时候把Button也算进去了，无法做出分辨（Button 继承于TextView）

布局文件：

>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/bg_search" > <LinearLayout android:id="@+id/search_layout" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="25dp" android:layout_marginRight="25dp" android:layout_marginTop="30dp" android:orientation="vertical" > <com.wjj.demo.DeletableEditText android:id="@+id/search_view" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/bg_edittext" android:drawableLeft="@drawable/ic_edittext_search" android:drawablePadding="6dp" android:drawableRight="@drawable/ic_edittext_delete" android:hint="请输入您要搜索的内容..." android:paddingBottom="7dp" android:paddingLeft="9dp" android:paddingRight="8dp" android:paddingTop="7dp" android:singleLine="true" android:textColor="#ffffff" android:textCursorDrawable="@null" android:textSize="16dp" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="3dp" android:orientation="horizontal" > <ImageView android:id="@+id/search_button" android:layout_width="80dp" android:layout_height="40dp" android:src="@drawable/ic_button_search"/> </LinearLayout> </LinearLayout> <com.wjj.demo.KeywordsFlow android:id="@+id/keywordsflow" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/search_layout" /> <ImageView android:id="@+id/back_arrow" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginBottom="14dp" android:src="@drawable/ic_back_arrow" /> </RelativeLayout>

自己定义EditText

public class DeletableEditText extends EditText{
          private Drawable mRightDrawable;    private boolean isHasFocus;    public DeletableEditText(Context context) {        super(context);        init();    }    public DeletableEditText(Context context, AttributeSet attrs) {        super(context, attrs);        init();    }    public DeletableEditText(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        init();    }    private void init(){        //getCompoundDrawables:        //Returns drawables for the left, top, right, and bottom borders.        Drawable [] drawables=this.getCompoundDrawables();        //取得right位置的Drawable        //即我们在布局文件里设置的android:drawableRight        mRightDrawable=drawables[2];            //设置焦点变化的监听        this.setOnFocusChangeListener(new FocusChangeListenerImpl());        //设置EditText文字变化的监听        this.addTextChangedListener(new TextWatcherImpl());        //初始化时让右边clean图标不可见        setClearDrawableVisible(false);    }    /**     * 当手指抬起的位置在clean的图标的区域     * 我们将此视为进行清除操作     * getWidth():得到控件的宽度     * event.getX():抬起时的坐标(改坐标是相对于控件本身而言的)     * getTotalPaddingRight():clean的图标左边缘至控件右边缘的距离     * getPaddingRight():clean的图标右边缘至控件右边缘的距离     * 于是:     * getWidth() - getTotalPaddingRight()表示:     * 控件左边到clean的图标左边缘的区域     * getWidth() - getPaddingRight()表示:     * 控件左边到clean的图标右边缘的区域     * 所以这两者之间的区域刚好是clean的图标的区域     */    @Override    public boolean onTouchEvent(MotionEvent event) {        switch (event.getAction()) {        case MotionEvent.ACTION_UP:            boolean isClean =(event.getX() > (getWidth() - getTotalPaddingRight()))&&                             (event.getX() < (getWidth() - getPaddingRight()));            if (isClean) {                setText("");            }            break;        default:            break;        }        return super.onTouchEvent(event);    }    private class FocusChangeListenerImpl implements OnFocusChangeListener{
              @Override        public void onFocusChange(View v, boolean hasFocus) {             isHasFocus=hasFocus;             if (isHasFocus) {                 boolean isVisible=getText().toString().length()>=1;                 setClearDrawableVisible(isVisible);            } else {                 setClearDrawableVisible(false);            }        }    }    //当输入结束后推断是否显示右边clean的图标    private class TextWatcherImpl implements TextWatcher{
              @Override        public void afterTextChanged(Editable s) {             boolean isVisible=getText().toString().length()>=1;             setClearDrawableVisible(isVisible);        }        @Override        public void beforeTextChanged(CharSequence s, int start, int count,int after) {        }        @Override        public void onTextChanged(CharSequence s, int start, int before,int count) {        }    }       //隐藏或者显示右边clean的图标    protected void setClearDrawableVisible(boolean isVisible) {        Drawable rightDrawable;        if (isVisible) {            rightDrawable = mRightDrawable;        } else {            rightDrawable = null;        }        //使用代码设置该控件left, top, right, and bottom处的图标        setCompoundDrawables(getCompoundDrawables()[0],getCompoundDrawables()[1],                              rightDrawable,getCompoundDrawables()[3]);    }     // 显示一个动画,以提示用户输入    public void setShakeAnimation() {        this.startAnimation(shakeAnimation(5));    }    //CycleTimes动画反复的次数    public Animation shakeAnimation(int CycleTimes) {        Animation translateAnimation = new TranslateAnimation(0, 10, 0, 10);        translateAnimation.setInterpolator(new CycleInterpolator(CycleTimes));        translateAnimation.setDuration(1000);        return translateAnimation;    }}

自己定义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 = 10; public static final int TEXT_SIZE_MAX = 21; public static final int TEXT_SIZE_MIN = 14; 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，标识开发者触发其開始动画显示。<br/> * 本标识的作用是防止在填充keywrods未完毕的过程中获取到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还有一必要条件：width 和 height不为0。

<br/> */

private boolean enableShow; private Random random; /** * @see ANIMATION_IN * @see ANIMATION_OUT * @see OUTSIDE_TO_LOCATION * @see LOCATION_TO_OUTSIDE * @see LOCATION_TO_CENTER * @see CENTER_TO_LOCATION * */ private int txtAnimInType, txtAnimOutType; /** 近期一次启动动画显示的时间。 */ private long lastStartAnimationTime; /** 动画执行时间。 */ private long animDuration; public KeywordsFlow(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(); } public KeywordsFlow(Context context, AttributeSet attrs) { super(context, attrs); init(); } public KeywordsFlow(Context context) { super(context); 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; } /** * 開始动画显示。

<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原因例如以下：<br/> * 1.时间上不同意，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 TextView txt = (TextView) getChildAt(i); if (txt.getVisibility() == View.GONE) { removeView(txt); continue; } FrameLayout.LayoutParams layParams = (LayoutParams) txt .getLayoutParams(); // Log.d("ANDROID_LAB", txt.getText() + " leftM=" + // layParams.leftMargin + " topM=" + layParams.topMargin // + " width=" + txt.getWidth()); int[] xy = new int[] { layParams.leftMargin, layParams.topMargin, txt.getWidth() }; AnimationSet animSet = getAnimationSet(xy, (width >> 1), (height >> 1), txtAnimOutType); txt.startAnimation(animSet); animSet.setAnimationListener(new AnimationListener() { public void onAnimationStart(Animation animation) { } public void onAnimationRepeat(Animation animation) { } public void onAnimationEnd(Animation animation) { txt.setOnClickListener(null); txt.setClickable(false); txt.setVisibility(View.GONE); } }); } } private boolean show() { if (width > 0 && height > 0 && vecKeywords != null && vecKeywords.size() > 0 && enableShow) { enableShow = false; lastStartAnimationTime = System.currentTimeMillis(); // 找到中心点 int xCenter = width >> 1, yCenter = height >> 1; // 关键字的个数。 int size = vecKeywords.size(); int xItem = width / size, yItem = height / size; Log.d("ANDROID_LAB", "--------------------------width=" + width + " height=" + height + " xItem=" + xItem + " yItem=" + yItem + "---------------------------"); LinkedList<Integer> listX = new LinkedList<Integer>(), listY = new LinkedList<Integer>(); for (int i = 0; i < size; i++) { // 准备随机候选数，分别相应x/y轴位置 listX.add(i * xItem); listY.add(i * yItem + (yItem >> 2)); Log.e("Search", "ListX:" + (i * xItem) + "#listY:" + (i * yItem + (yItem >> 2))); } // TextView[] txtArr = new TextView[size]; LinkedList<TextView> listTxtTop = new LinkedList<TextView>(); LinkedList<TextView> listTxtBottom = new LinkedList<TextView>(); for (int i = 0; i < size; i++) { String keyword = vecKeywords.get(i); // 随机颜色 // int ranColor = 0xff000000 | random.nextInt(0x0077ffff); // 随机位置。糙值 int xy[] = randomXY(random, listX, listY, xItem); // 随机字体大小 int txtSize = TEXT_SIZE_MIN + random.nextInt(TEXT_SIZE_MAX - TEXT_SIZE_MIN + 1); // 实例化TextView final TextView txt = new TextView(getContext()); txt.setOnClickListener(itemClickListener); txt.setText(keyword); txt.setTextColor(Color.parseColor("#8cffffff")); txt.setTextSize(TypedValue.COMPLEX_UNIT_SP, txtSize); txt.setShadowLayer(1, 1, 1, 0xdd696969); txt.setGravity(Gravity.CENTER); // txt.setBackgroundColor(Color.RED); // 获取文本长度 Paint paint = txt.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; // 降低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) { // 降低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); txt.setTag(xy); if (xy[IDX_Y] > yCenter) { listTxtBottom.add(txt); } else { listTxtTop.add(txt); } } attach2Screen(listTxtTop, xCenter, yCenter, yItem); attach2Screen(listTxtBottom, xCenter, yCenter, yItem); return true; } return false; } /** 修正TextView的Y坐标将将其加入到容器上。 */ private void attach2Screen(LinkedList<TextView> listTxt, int xCenter, int yCenter, int yItem) { int size = listTxt.size(); sortXYList(listTxt, size); for (int i = 0; i < size; i++) { TextView txt = listTxt.get(i); int[] iXY = (int[]) txt.getTag(); // Log.d("ANDROID_LAB", "fix[ " + txt.getText() + " ] x:" + // iXY[IDX_X] + " y:" + iXY[IDX_Y] + " r2=" // + iXY[IDX_DIS_Y]); // 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 // 对于能够一路下降到中心点的，则该值也是其应调整的大小 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，在同一側 if (yDistance * (kXY[IDX_Y] - yCenter) > 0) { // Log.d("ANDROID_LAB", "compare:" + // listTxt.get(k).getText()); 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; } // Log.d("ANDROID_LAB", "break"); break inner; } } } // Log.d("ANDROID_LAB", txt.getText() + " yMove=" + yMove); 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个须要再次排序 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(txt, layParams); // 动画 AnimationSet animSet = getAnimationSet(iXY, xCenter, yCenter, txtAnimInType); txt.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; } /** * 依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<TextView> 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]) { TextView iTmp = listTxt.get(i); TextView 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; } 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(); } /** 直接清除全部的TextView。在清除之前不会显示动画。 */ public void rubAllViews() { removeAllViews(); } public void setOnItemClickListener(OnClickListener listener) { itemClickListener = listener; } }

整个呈现效果还是满美观的，然后详细内容能够看源代码，拿来就能用

源代码地址： 訪问password b1b7