类似微信下拉眼睛UI

public class EyeView extends FrameLayout {    private Paint paint;    private Bitmap bitmap;    public EyeView(Context context) {        super(context);        init();    }    public EyeView(Context context, AttributeSet attrs) {        super(context, attrs);        init();    }    public EyeView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        init();    }    @SuppressLint("NewApi")    private void init() {        setDrawingCacheEnabled(true);        if (Build.VERSION.SDK_INT >= 11) {            setLayerType(LAYER_TYPE_SOFTWARE, null);        }        paint = new Paint(Paint.ANTI_ALIAS_FLAG);    }    @Override    protected void dispatchDraw(Canvas canvas) {        super.dispatchDraw(canvas);        if (bitmap != null) {            paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));            canvas.drawBitmap(bitmap, 0, 0, paint);            paint.setXfermode(null);        }    }    public void setRadius(int radius) {        if (bitmap != null && !bitmap.isRecycled()) {            bitmap.recycle();        }        bitmap = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(bitmap);        canvas.drawCircle(getWidth() / 2f, getHeight() / 2f, radius, paint);        invalidate();    }}

public class PullLayout extends ScrollView {    private View rl_top;    private View ll_weather;    private View ll_content;    private TextView tv;    private EyeView ev;    private ObjectAnimator oa;    private float lastY = -1;    private float detalY = -1;    private int range;    private int tvHeight;    private int tvWidth;    private boolean isTouchOrRunning;    private boolean isActionCancel;    public PullLayout(Context context) {        super(context);    }    public PullLayout(Context context, AttributeSet attrs) {        super(context, attrs);    }    public PullLayout(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);    }    @Override    protected void onFinishInflate() {        super.onFinishInflate();        setVerticalScrollBarEnabled(false);        rl_top = findViewById(R.id.rl_top);        ll_content = findViewById(R.id.ll_content);        tv = (TextView) findViewById(R.id.tv);        ev = (EyeView) findViewById(R.id.ev);        ll_weather = findViewById(R.id.ll_weather);        rl_top.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {            @SuppressWarnings("deprecation")            @Override            public void onGlobalLayout() {                rl_top.getViewTreeObserver().removeGlobalOnLayoutListener(this);                range = rl_top.getHeight();                scrollTo(0, range);                rl_top.getLayoutParams().height = range;            }        });        tv.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {            @SuppressWarnings("deprecation")            @Override            public void onGlobalLayout() {                tv.getViewTreeObserver().removeGlobalOnLayoutListener(this);                tvHeight = tv.getHeight();                tvWidth = tv.getWidth();                ViewHelper.setTranslationY(ll_content, tvHeight);            }        });        ev.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                close();            }        });        tv.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                open();            }        });    }    @Override    public boolean onInterceptTouchEvent(MotionEvent ev) {        switch (ev.getAction()) {            case MotionEvent.ACTION_DOWN:                isActionCancel = false;                isTouchOrRunning = true;                lastY = ev.getY();                break;        }        return super.onInterceptTouchEvent(ev);    }    @Override    public boolean onTouchEvent(MotionEvent ev) {        if (oa != null && oa.isRunning()) {            ev.setAction(MotionEvent.ACTION_UP);            isActionCancel = true;        }        if (isActionCancel && ev.getAction() != MotionEvent.ACTION_DOWN) {            return false;        }        if (ev.getActionIndex() != 0 && getScrollY() < range) {            ev.setAction(MotionEvent.ACTION_UP);            isActionCancel = true;        }        switch (ev.getAction()) {            case MotionEvent.ACTION_MOVE:                isTouchOrRunning = true;                if (getScrollY() != 0) {                    detalY = 0;                    lastY = ev.getY();                } else {                    detalY = ev.getY() - lastY;                    if (detalY > 0) {                        setT((int) -detalY / 5);                        return true;                    }                }                break;            case MotionEvent.ACTION_UP:                isTouchOrRunning = false;                if (getScrollY() < range) {                    if (detalY != 0) {                        reset();                    } else {                        toggle();                    }                    return true;                }                break;        }        return super.onTouchEvent(ev);    }    @Override    protected void onScrollChanged(int l, int t, int oldl, int oldt) {        super.onScrollChanged(l, t, oldl, oldt);        if (t > range) {            return;        } else if (!isTouchOrRunning && t != range) {            scrollTo(0, range);        } else {            animateScroll(t);        }    }    public void setT(int t) {        scrollTo(0, t);        if (t < 0) {            animatePull(t);        }    }    private void animateScroll(int t) {        float percent = (float) t / range;        ViewHelper.setTranslationY(rl_top, t);        ViewHelper.setTranslationY(ll_content, tvHeight * percent);        ViewHelper.setScaleX(tv, 2 - percent);        ViewHelper.setScaleY(tv, 2 - percent);        ViewHelper.setTranslationX(tv, tvWidth * (1 - percent) / 2f);        ViewHelper.setTranslationY(tv, t + tvHeight * (1 - percent) / 2f);        ViewHelper.setTranslationY(ev, -t / 2);        ViewHelper.setTranslationY(ll_weather, -t / 2);        ev.setRadius((int) (range * 0.25f * (1 - percent)));        tv.setTextColor(evaluate(percent, Color.WHITE, Color.BLACK));    }    private void animatePull(int t) {        rl_top.getLayoutParams().height = range - t;        rl_top.requestLayout();        float percent = (float) t / range;        ViewHelper.setScaleX(ev, 1 - percent);        ViewHelper.setScaleY(ev, 1 - percent);        ViewHelper.setScaleX(tv, 2 - percent);        ViewHelper.setScaleY(tv, 2 - percent);        ViewHelper.setTranslationX(tv, tvWidth * (1 - percent) / 2f);        ViewHelper.setTranslationY(ll_weather, t / 2);    }    private Integer evaluate(float fraction, Object startValue, Integer endValue) {        int startInt = (Integer) startValue;        int startA = (startInt >> 24) & 0xff;        int startR = (startInt >> 16) & 0xff;        int startG = (startInt >> 8) & 0xff;        int startB = startInt & 0xff;        int endInt = (Integer) endValue;        int endA = (endInt >> 24) & 0xff;        int endR = (endInt >> 16) & 0xff;        int endG = (endInt >> 8) & 0xff;        int endB = endInt & 0xff;        return (int) ((startA + (int) (fraction * (endA - startA))) << 24)                | (int) ((startR + (int) (fraction * (endR - startR))) << 16)                | (int) ((startG + (int) (fraction * (endG - startG))) << 8)                | (int) ((startB + (int) (fraction * (endB - startB))));    }    public void toggle() {        if (isOpen()) {            close();        } else {            open();        }    }    private Status status;    public enum Status {        Open, Close;    }    public boolean isOpen() {        return status == Status.Open;    }    private void reset() {        if (oa != null && oa.isRunning()) {            return;        }        oa = ObjectAnimator.ofInt(this, "t", (int) -detalY / 5, 0);        oa.setDuration(150);        oa.start();    }    public void close() {        if (oa != null && oa.isRunning()) {            return;        }        oa = ObjectAnimator.ofInt(this, "t", getScrollY(), range);        oa.setInterpolator(new DecelerateInterpolator());        oa.addListener(new AnimatorListener() {            @Override            public void onAnimationStart(Animator arg0) {                isTouchOrRunning = true;            }            @Override            public void onAnimationRepeat(Animator arg0) {            }            @Override            public void onAnimationEnd(Animator arg0) {                isTouchOrRunning = false;                status = Status.Close;            }            @Override            public void onAnimationCancel(Animator arg0) {            }        });        oa.setDuration(250);        oa.start();    }    public void open() {        if (oa != null && oa.isRunning()) {            return;        }        oa = ObjectAnimator.ofInt(this, "t", getScrollY(), (int) (-getScrollY() / 2.2f), 0);        oa.setInterpolator(new DecelerateInterpolator());        oa.addListener(new AnimatorListener() {            @Override            public void onAnimationStart(Animator arg0) {                isTouchOrRunning = true;            }            @Override            public void onAnimationRepeat(Animator arg0) {            }            @Override            public void onAnimationEnd(Animator arg0) {                isTouchOrRunning = false;                status = Status.Open;            }            @Override            public void onAnimationCancel(Animator arg0) {            }        });        oa.setDuration(400);        oa.start();    }}

<com.bluemor.pulllayout.PullLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="match_parent" >        <RelativeLayout            android:id="@+id/rl_top"            android:layout_width="match_parent"            android:layout_height="wrap_content" >            <ImageView                android:id="@+id/iv"                android:layout_width="match_parent"                android:layout_height="match_parent"                android:scaleType="centerCrop"                android:src="@drawable/weather_bg_rain" />            <com.bluemor.pulllayout.EyeView                android:id="@+id/ev"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_alignParentRight="true"                android:layout_centerVertical="true"                android:layout_marginRight="30dp"                android:background="@drawable/selector_bg" >                <ImageView                    android:layout_width="match_parent"                    android:layout_height="wrap_content"                    android:scaleType="centerCrop"                    android:src="@drawable/eye" />            </com.bluemor.pulllayout.EyeView>            <LinearLayout                android:id="@+id/ll_weather"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_alignParentBottom="true"                android:layout_marginBottom="30dp"                android:layout_marginLeft="30dp"                android:orientation="horizontal" >                <TextView                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:drawableTop="@drawable/weather_mostly_cloudy"                    android:gravity="center"                    android:text="10°~17°\r\n星期三"                    android:textColor="@android:color/white"                    android:textSize="12sp" />                <TextView                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:layout_marginLeft="30dp"                    android:drawableTop="@drawable/weather_drizzle"                    android:gravity="center"                    android:text="11°~18°\r\n星期四"                    android:textColor="@android:color/white"                    android:textSize="12sp" />            </LinearLayout>        </RelativeLayout>        <FrameLayout            android:id="@+id/fl_bottom"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:layout_below="@id/rl_top"            android:background="#F4F4F4" >            <LinearLayout                android:id="@+id/ll_content"                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:orientation="vertical"                android:paddingBottom="50dp"                android:paddingTop="10dp" >                <ImageView                    android:layout_width="match_parent"                    android:layout_height="wrap_content"                    android:src="@drawable/clip" />                <ImageView                    android:layout_width="match_parent"                    android:layout_height="wrap_content"                    android:src="@drawable/clip2" />                <ImageView                    android:layout_width="match_parent"                    android:layout_height="wrap_content"                    android:src="@drawable/clip2" />            </LinearLayout>        </FrameLayout>        <TextView            android:id="@+id/tv"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_marginBottom="10dp"            android:layout_marginLeft="25dp"            android:layout_marginRight="25dp"            android:layout_marginTop="10dp"            android:background="@drawable/selector_bg"            android:paddingBottom="5dp"            android:paddingTop="5dp"            android:text="BlueMor"            android:textSize="25sp" />    </RelativeLayout></com.bluemor.pulllayout.PullLayout>

demo下载地址：http://download.csdn.net/detail/u014600432/8291613