Android实现微博菜单弹出效果

package com.jerome.weibo;  import android.animation.Animator; import android.animation.Animator.AnimatorListener; import android.animation.ObjectAnimator; import android.animation.ValueAnimator; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.drawable.BitmapDrawable; import android.os.Handler; import android.util.DisplayMetrics; import android.util.Log; import android.view.Gravity; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.view.animation.Animation; import android.view.animation.Animation.AnimationListener; import android.view.animation.AnimationSet; import android.view.animation.TranslateAnimation; import android.widget.ImageView; import android.widget.PopupWindow; import android.widget.RelativeLayout; import android.widget.RelativeLayout.LayoutParams;  public class MoreWindow extends PopupWindow implements OnClickListener{   private String TAG = MoreWindow.class.getSimpleName();  Activity mContext;  private int mWidth;  private int mHeight;  private int statusBarHeight ;  private Bitmap mBitmap= null;  private Bitmap overlay = null;    private Handler mHandler = new Handler();   public MoreWindow(Activity context) {   mContext = context;  }   public void init() {   Rect frame = new Rect();   mContext.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);   statusBarHeight = frame.top;   DisplayMetrics metrics = new DisplayMetrics();   mContext.getWindowManager().getDefaultDisplay()     .getMetrics(metrics);   mWidth = metrics.widthPixels;   mHeight = metrics.heightPixels;      setWidth(mWidth);   setHeight(mHeight);  }    private Bitmap blur() {   if (null != overlay) {    return overlay;   }   long startMs = System.currentTimeMillis();    View view = mContext.getWindow().getDecorView();   view.setDrawingCacheEnabled(true);   view.buildDrawingCache(true);   mBitmap = view.getDrawingCache();      float scaleFactor = 8;//图片缩放比例；   float radius = 10;//模糊程度   int width = mBitmap.getWidth();   int height = mBitmap.getHeight();    overlay = Bitmap.createBitmap((int) (width / scaleFactor),(int) (height / scaleFactor),Bitmap.Config.ARGB_8888);   Canvas canvas = new Canvas(overlay);   canvas.scale(1 / scaleFactor, 1 / scaleFactor);   Paint paint = new Paint();   paint.setFlags(Paint.FILTER_BITMAP_FLAG);   canvas.drawBitmap(mBitmap, 0, 0, paint);    overlay = FastBlur.doBlur(overlay, (int) radius, true);   Log.i(TAG, "blur time is:"+(System.currentTimeMillis() - startMs));   return overlay;  }    private Animation showAnimation1(final View view,int fromY ,int toY) {   AnimationSet set = new AnimationSet(true);   TranslateAnimation go = new TranslateAnimation(0, 0, fromY, toY);   go.setDuration(300);   TranslateAnimation go1 = new TranslateAnimation(0, 0, -10, 2);   go1.setDuration(100);   go1.setStartOffset(250);   set.addAnimation(go1);   set.addAnimation(go);    set.setAnimationListener(new AnimationListener() {     @Override    public void onAnimationEnd(Animation animation) {    }     @Override    public void onAnimationRepeat(Animation animation) {     }     @Override    public void onAnimationStart(Animation animation) {     }    });   return set;  }     public void showMoreWindow(View anchor,int bottomMargin) {   final RelativeLayout layout = (RelativeLayout)LayoutInflater.from(mContext).inflate(R.layout.center_music_more_window, null);   setContentView(layout);      ImageView close= (ImageView)layout.findViewById(R.id.center_music_window_close);   android.widget.RelativeLayout.LayoutParams params =new android.widget.RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);   params.bottomMargin = bottomMargin;   params.addRule(RelativeLayout.BELOW, R.id.more_window_auto);   params.addRule(RelativeLayout.RIGHT_OF, R.id.more_window_collect);   params.topMargin = 200;   params.leftMargin = 18;   close.setLayoutParams(params);      close.setOnClickListener(new OnClickListener() {     @Override    public void onClick(View v) {     if (isShowing()) {      closeAnimation(layout);     }    }    });      showAnimation(layout);   setBackgroundDrawable(new BitmapDrawable(mContext.getResources(), blur()));   setOutsideTouchable(true);   setFocusable(true);   showAtLocation(anchor, Gravity.BOTTOM, 0, statusBarHeight);  }   private void showAnimation(ViewGroup layout){   for(int i=0;i<layout.getChildCount();i++){    final View child = layout.getChildAt(i);    if(child.getId() == R.id.center_music_window_close){     continue;    }    child.setOnClickListener(this);    child.setVisibility(View.INVISIBLE);    mHandler.postDelayed(new Runnable() {          @Override     public void run() {      child.setVisibility(View.VISIBLE);      ValueAnimator fadeAnim = ObjectAnimator.ofFloat(child, "translationY", 600, 0);      fadeAnim.setDuration(300);      KickBackAnimator kickAnimator = new KickBackAnimator();      kickAnimator.setDuration(150);      fadeAnim.setEvaluator(kickAnimator);      fadeAnim.start();     }    }, i * 50);   }     }   private void closeAnimation(ViewGroup layout){   for(int i=0;i<layout.getChildCount();i++){    final View child = layout.getChildAt(i);    if(child.getId() == R.id.center_music_window_close){     continue;    }    child.setOnClickListener(this);    mHandler.postDelayed(new Runnable() {          @Override     public void run() {      child.setVisibility(View.VISIBLE);      ValueAnimator fadeAnim = ObjectAnimator.ofFloat(child, "translationY", 0, 600);      fadeAnim.setDuration(200);      KickBackAnimator kickAnimator = new KickBackAnimator();      kickAnimator.setDuration(100);      fadeAnim.setEvaluator(kickAnimator);      fadeAnim.start();      fadeAnim.addListener(new AnimatorListener() {              @Override       public void onAnimationStart(Animator animation) {        // TODO Auto-generated method stub               }              @Override       public void onAnimationRepeat(Animator animation) {        // TODO Auto-generated method stub               }              @Override       public void onAnimationEnd(Animator animation) {        child.setVisibility(View.INVISIBLE);       }              @Override       public void onAnimationCancel(Animator animation) {        // TODO Auto-generated method stub               }      });     }    }, (layout.getChildCount()-i-1) * 30);        if(child.getId() == R.id.more_window_local){     mHandler.postDelayed(new Runnable() {            @Override      public void run() {       dismiss();      }     }, (layout.getChildCount()-i) * 30 + 80);    }   }     }   @Override  public void onClick(View v) {   switch (v.getId()) {   case R.id.more_window_local:    break;   case R.id.more_window_online:    break;   case R.id.more_window_delete:    break;   case R.id.more_window_collect:    break;   case R.id.more_window_auto:    break;   case R.id.more_window_external:    break;    default:    break;   }  }    public void destroy() {   if (null != overlay) {    overlay.recycle();    overlay = null;    System.gc();   }   if (null != mBitmap) {    mBitmap.recycle();    mBitmap = null;    System.gc();   }  }   } 

package com.jerome.weibo;  import android.animation.TypeEvaluator;  public class KickBackAnimator implements TypeEvaluator<Float> {  private final float s = 1.70158f;  float mDuration = 0f;   public void setDuration(float duration) {   mDuration = duration;  }   public Float evaluate(float fraction, Float startValue, Float endValue) {   float t = mDuration * fraction;   float b = startValue.floatValue();   float c = endValue.floatValue() - startValue.floatValue();   float d = mDuration;   float result = calculate(t, b, c, d);   return result;  }   public Float calculate(float t, float b, float c, float d) {   return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;  } }