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先看看我們今天要實現(xiàn)功能的效果圖：

來看下我們今天要介紹的主角：

PullToZoomInListView

Github地址如下：

https://github.com/matrixxun/PullToZoomInListView

一個下拉放大的空間，這種效果在ios應用中很常見，Android中不少應用也有它的身影，玩過QQ的人都知道，QQ空間動態(tài)界面有著這幾個功能（下拉刷新，圖片放大，上拉加載更多，標題欄漸變，圖標變化）

本著不重復造輪子，在前人的基礎(chǔ)上而外添加了些功能：

1、添加了一個footer

2、添加了一個監(jiān)聽器，用于監(jiān)聽下拉刷新和上拉加載更多

3、添加了一個判斷是否有更多數(shù)據(jù)的方法

修改后的PullToZoomInListView代碼如下：

public class PullToZoomListView extends ListView implements AbsListView.OnScrollListener {
    private View footerView;    private TextView tv_footer_text;    private View fl_progress_bar;    private boolean isNoMore = false;    private boolean isLoad = false;    private static final Interpolator sInterpolator = new Interpolator() {        public float getInterpolation(float paramAnonymousFloat) {            float f = paramAnonymousFloat - 1.0F;            return 1.0F + f * (f * (f * (f * f)));        }    };    int mActivePointerId = -1;    private FrameLayout mHeaderContainer;    private int mHeaderHeight;
    public int getmHeaderHeight() {        return mHeaderHeight;    }
    /**     * 設置頭部的高度     *     * @param mHeaderHeight     */    public void setmHeaderHeight(int mHeaderHeight) {        this.mHeaderHeight = mHeaderHeight;        AbsListView.LayoutParams lp = new AbsListView.LayoutParams(DensityUtil.dp2px(mContext,                AbsListView.LayoutParams.MATCH_PARENT), mHeaderHeight);        getHeaderContainer().setLayoutParams(lp);    }
    private ImageView mHeaderImage;    float mLastMotionY = -1.0F;    float mLastScale = -1.0F;    float mMaxScale = -1.0F;    private AbsListView.OnScrollListener mOnScrollListener;    private ScalingRunnalable mScalingRunnalable;    private int mScreenHeight;    private ImageView mShadow;
    private Context mContext;
    public PullToZoomListView(Context paramContext) {        super(paramContext);        init(paramContext);        mContext = paramContext;    }
    public PullToZoomListView(Context paramContext, AttributeSet paramAttributeSet) {        super(paramContext, paramAttributeSet);        init(paramContext);        mContext = paramContext;    }
    public PullToZoomListView(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {        super(paramContext, paramAttributeSet, paramInt);        init(paramContext);        mContext = paramContext;    }
    private void endScraling() {        if (this.mHeaderContainer.getBottom() >= this.mHeaderHeight)            Log.d("mmm", "endScraling");        this.mScalingRunnalable.startAnimation(100L);    }
    private void init(Context paramContext) {        DisplayMetrics localDisplayMetrics = new DisplayMetrics();        ((Activity) paramContext).getWindowManager().getDefaultDisplay().getMetrics(localDisplayMetrics);        this.mScreenHeight = localDisplayMetrics.heightPixels;        this.mHeaderContainer = new FrameLayout(paramContext);
        this.mHeaderImage = new ImageView(paramContext);        mHeaderImage.setScaleType(ImageView.ScaleType.CENTER_CROP);        int i = localDisplayMetrics.widthPixels;        setHeaderViewSize(i, (int) (9.0F * (i / 16.0F)));        this.mShadow = new ImageView(paramContext);        FrameLayout.LayoutParams localLayoutParams = new FrameLayout.LayoutParams(-1, -2);        localLayoutParams.gravity = Gravity.CENTER;        this.mShadow.setLayoutParams(localLayoutParams);        this.mHeaderContainer.addView(this.mHeaderImage);        this.mHeaderContainer.addView(this.mShadow);        // addHeaderView(this.mHeaderContainer);        footerView = LayoutInflater.from(paramContext).inflate(R.layout.zoomlistview_footer, null);        tv_footer_text = (TextView) footerView.findViewById(R.id.tv_footer_text);        fl_progress_bar = footerView.findViewById(R.id.fl_progress_bar);        //addFooterView        addFooterView(footerView);        this.mScalingRunnalable = new ScalingRunnalable();        super.setOnScrollListener(this);    }
    private void onSecondaryPointerUp(MotionEvent paramMotionEvent) {        int i = (paramMotionEvent.getAction()) >> 8;        if (paramMotionEvent.getPointerId(i) == this.mActivePointerId)            if (i != 0) {                this.mLastMotionY = paramMotionEvent.getY(0);                this.mActivePointerId = paramMotionEvent.getPointerId(0);                return;            }    }
    private void reset() {        this.mActivePointerId = -1;        this.mLastMotionY = -1.0F;        this.mMaxScale = -1.0F;        this.mLastScale = -1.0F;    }
    public ImageView getHeaderView() {        return this.mHeaderImage;    }
    public FrameLayout getHeaderContainer() {        return mHeaderContainer;    }
    public void setHeaderView() {        addHeaderView(this.mHeaderContainer);    }
    /*     * public boolean onInterceptTouchEvent(MotionEvent ev) {     *     * final int action = ev.getAction() & MotionEvent.ACTION_MASK; float     * mInitialMotionX= 0; float mLastMotionX= 0;     *     * float mInitialMotionY= 0; float mLastMotionY = 0;     *     * boolean isIntercept=false; switch (action) { case     * MotionEvent.ACTION_DOWN:     *     * mLastMotionY=ev.getY(); break;     *     * case MotionEvent.ACTION_MOVE: mInitialMotionY = ev.getY();     *     * if(Math.abs(mInitialMotionY-mLastMotionY)>50) { isIntercept=true; }     * break;     *     * }     *     * return isIntercept; }     */
    protected void onLayout(boolean paramBoolean, int paramInt1, int paramInt2, int paramInt3, int paramInt4) {        super.onLayout(paramBoolean, paramInt1, paramInt2, paramInt3, paramInt4);        if (this.mHeaderHeight == 0)            this.mHeaderHeight = this.mHeaderContainer.getHeight();    }
    @Override    public void onScroll(AbsListView paramAbsListView, int paramInt1, int paramInt2, int paramInt3) {
        float f = this.mHeaderHeight - this.mHeaderContainer.getBottom();        if ((f > 0.0F) && (f < this.mHeaderHeight)) {            Log.d("mmm", "1");            int i = (int) (0.65D * f);            this.mHeaderImage.scrollTo(0, -i);        } else if (this.mHeaderImage.getScrollY() != 0) {            Log.d("mmm", "2");            this.mHeaderImage.scrollTo(0, 0);        }        if (this.mOnScrollListener != null) {            this.mOnScrollListener.onScroll(paramAbsListView, paramInt1, paramInt2, paramInt3);        }    }
    public void onScrollStateChanged(AbsListView paramAbsListView, int paramInt) {        if (this.mOnScrollListener != null) {            this.mOnScrollListener.onScrollStateChanged(paramAbsListView, paramInt);        }        if (paramAbsListView.getLastVisiblePosition() == (getCount() - 1)) {            if (isNoMore) {                footerView.setVisibility(View.GONE);                footerView.setPadding(0, -200, 0, 0);            } else {                footerView.setVisibility(View.VISIBLE);                footerView.setPadding(0, 0, 0, 0);                tv_footer_text.setText(R.string.load_more_loading);                fl_progress_bar.setVisibility(View.VISIBLE);                startLoadMore();            }        }    }
    /**     * 是否還有更多數(shù)據(jù)     * @param hasNoMore     */    public void setLoadFinish(boolean hasNoMore) {        fl_progress_bar.setVisibility(View.GONE);        isLoad = false;        isNoMore = hasNoMore;        if (isNoMore) {            tv_footer_text.setText(R.string.load_more_loaded_no_more);        } else {            tv_footer_text.setText(R.string.load_more_loading);        }    }
    @Override    public boolean dispatchTouchEvent(MotionEvent paramMotionEvent) {
        Log.d("mmm=dispatchTouchEvent=", "" + (0xFF & paramMotionEvent.getAction()));        switch (0xFF & paramMotionEvent.getAction()) {            case MotionEvent.ACTION_OUTSIDE:            case MotionEvent.ACTION_DOWN:                if (!this.mScalingRunnalable.mIsFinished) {                    this.mScalingRunnalable.abortAnimation();                }                this.mLastMotionY = paramMotionEvent.getY();                this.mActivePointerId = paramMotionEvent.getPointerId(0);                this.mMaxScale = (this.mScreenHeight / this.mHeaderHeight);                this.mLastScale = (this.mHeaderContainer.getBottom() / this.mHeaderHeight);                break;        }        return super.dispatchTouchEvent(paramMotionEvent);    }
    public boolean onTouchEvent(MotionEvent paramMotionEvent) {        Log.d("mmm=========******", "" + (0xFF & paramMotionEvent.getAction()));        switch (0xFF & paramMotionEvent.getAction()) {            case MotionEvent.ACTION_OUTSIDE:            case MotionEvent.ACTION_DOWN:                if (!this.mScalingRunnalable.mIsFinished) {                    this.mScalingRunnalable.abortAnimation();                }                this.mLastMotionY = paramMotionEvent.getY();                this.mActivePointerId = paramMotionEvent.getPointerId(0);                this.mMaxScale = (this.mScreenHeight / this.mHeaderHeight);                this.mLastScale = (this.mHeaderContainer.getBottom() / this.mHeaderHeight);                break;            case MotionEvent.ACTION_MOVE:                Log.d("mmm", "mActivePointerId" + mActivePointerId);                int j = paramMotionEvent.findPointerIndex(this.mActivePointerId);                if (j == -1) {                    Log.e("PullToZoomListView", "Invalid pointerId=" + this.mActivePointerId + " in onTouchEvent");                } else {                    if (this.mLastMotionY == -1.0F)                        this.mLastMotionY = paramMotionEvent.getY(j);                    if (this.mHeaderContainer.getBottom() >= this.mHeaderHeight) {                        ViewGroup.LayoutParams localLayoutParams = this.mHeaderContainer.getLayoutParams();                        float f = ((paramMotionEvent.getY(j) - this.mLastMotionY + this.mHeaderContainer.getBottom())                                / this.mHeaderHeight - this.mLastScale)                                / 2.0F + this.mLastScale;                        if ((this.mLastScale <= 1.0D) && (f < this.mLastScale)) {                            localLayoutParams.height = this.mHeaderHeight;                            this.mHeaderContainer.setLayoutParams(localLayoutParams);                            return super.onTouchEvent(paramMotionEvent);                        }                        this.mLastScale = Math.min(Math.max(f, 1.0F), this.mMaxScale);                        localLayoutParams.height = ((int) (this.mHeaderHeight * this.mLastScale));                        if (localLayoutParams.height < this.mScreenHeight)                            this.mHeaderContainer.setLayoutParams(localLayoutParams);                        this.mLastMotionY = paramMotionEvent.getY(j);                        return true;                    }                    this.mLastMotionY = paramMotionEvent.getY(j);                }                break;            case MotionEvent.ACTION_UP:                reset();                endScraling();                break;            case MotionEvent.ACTION_CANCEL:                int i = paramMotionEvent.getActionIndex();                this.mLastMotionY = paramMotionEvent.getY(i);                this.mActivePointerId = paramMotionEvent.getPointerId(i);                break;            case MotionEvent.ACTION_POINTER_DOWN:                onSecondaryPointerUp(paramMotionEvent);
                try {                    this.mLastMotionY = paramMotionEvent.getY(paramMotionEvent.findPointerIndex(this.mActivePointerId));                } catch (IllegalArgumentException e) {                    // TODO: handle exception                }                break;            case MotionEvent.ACTION_POINTER_UP:        }        return super.onTouchEvent(paramMotionEvent);    }
    public void setHeaderViewSize(int paramInt1, int paramInt2) {        Object localObject = this.mHeaderContainer.getLayoutParams();        if (localObject == null)            localObject = new AbsListView.LayoutParams(paramInt1, paramInt2);        ((ViewGroup.LayoutParams) localObject).width = paramInt1;        ((ViewGroup.LayoutParams) localObject).height = paramInt2;        this.mHeaderContainer.setLayoutParams((ViewGroup.LayoutParams) localObject);        this.mHeaderHeight = paramInt2;    }
    public void setOnScrollListener(AbsListView.OnScrollListener paramOnScrollListener) {        this.mOnScrollListener = paramOnScrollListener;    }
    public void setShadow(int paramInt) {        this.mShadow.setBackgroundResource(paramInt);    }
    class ScalingRunnalable implements Runnable {        long mDuration;        boolean mIsFinished = true;        float mScale;        long mStartTime;
        ScalingRunnalable() {        }
        public void abortAnimation() {            this.mIsFinished = true;        }
        public boolean isFinished() {            return this.mIsFinished;        }
        public void run() {            float f2;            ViewGroup.LayoutParams localLayoutParams;            if ((!this.mIsFinished) && (this.mScale > 1.0D)) {                float f1 = ((float) SystemClock.currentThreadTimeMillis() - (float) this.mStartTime)                        / (float) this.mDuration;                f2 = this.mScale - (this.mScale - 1.0F) * PullToZoomListView.sInterpolator.getInterpolation(f1);                localLayoutParams = PullToZoomListView.this.mHeaderContainer.getLayoutParams();                if (f2 > 1.0F) {                    Log.d("mmm", "f2>1.0");                    localLayoutParams.height = PullToZoomListView.this.mHeaderHeight;                    localLayoutParams.height = ((int) (f2 * PullToZoomListView.this.mHeaderHeight));                    PullToZoomListView.this.mHeaderContainer.setLayoutParams(localLayoutParams);                    PullToZoomListView.this.post(this);
                    startReload();//FIXME                    return;                }                this.mIsFinished = true;            }        }
        public void startAnimation(long paramLong) {            this.mStartTime = SystemClock.currentThreadTimeMillis();            this.mDuration = paramLong;            this.mScale = ((float) (PullToZoomListView.this.mHeaderContainer.getBottom()) / PullToZoomListView.this.mHeaderHeight);            this.mIsFinished = false;            PullToZoomListView.this.post(this);        }    }
    /**     * 加載更多     */    private void startLoadMore() {        if (mListViewListener != null && !isLoad) {            isLoad = true;            mListViewListener.onLoadMore();        }    }
    /**     * 下拉刷新     */    private void startReload() {        if (mListViewListener != null && !isLoad) {            isLoad = true;            mListViewListener.onReload();        }    }
    public void setPullToZoomListViewListener(PullToZoomListViewListener l) {        mListViewListener = l;    }
    public interface PullToZoomListViewListener {        void onReload();
        void onLoadMore();    }
    private PullToZoomListViewListener mListViewListener;}??

接下來看下MainActivity的布局文件：

xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context="commumu.parallaxheader.MainActivity">
            android:id="@+id/ptzlv_container"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:dividerHeight="0dp"        android:fadingEdge="none"        android:listSelector="@android:color/transparent"        android:scrollbarStyle="outsideOverlay" />
            android:id="@+id/rl_top"        android:layout_width="match_parent"        android:layout_height="@dimen/nav_top_bar_height"        android:background="@drawable/bg_nav_panel"        android:gravity="center">

                    android:id="@+id/tv_nick"            android:layout_width="wrap_content"            android:layout_height="match_parent"            android:layout_centerHorizontal="true"            android:gravity="center_vertical"            android:text="生活如此多嬌"            android:textColor="@android:color/white"            android:textSize="@dimen/text_title_big_size"            android:textStyle="bold" />
                    android:layout_width="wrap_content"            android:layout_toLeftOf="@+id/tv_nick"            android:layout_height="match_parent">                            style="?android:attr/progressBarStyleSmall"                android:id="@+id/progressBar"                android:layout_width="35dp"                android:layout_centerVertical="true"                android:layout_height="35dp"                android:indeterminateDrawable="@drawable/bg_refresh_loding"                android:visibility="gone" />        
                    android:id="@+id/rl_userinfo_top_avatar"            android:layout_width="40dp"            android:layout_height="46dp"            android:layout_alignParentBottom="true"            android:layout_toLeftOf="@id/tv_nick"            android:visibility="gone">
                            android:id="@+id/iv_avatar"                android:layout_width="35dp"                android:layout_height="35dp"                android:layout_centerInParent="true"                android:background="@android:color/transparent"                android:scaleType="centerCrop"                android:src="@drawable/icon_default_avatar" />
                            android:id="@+id/iv_certified"                android:layout_width="12dp"                android:layout_height="12dp"                android:layout_alignParentBottom="true"                android:layout_alignParentRight="true"                android:layout_marginBottom="4dp"                android:layout_marginRight="4dp"                android:scaleType="centerCrop"                android:src="@drawable/icon_authenticate"                android:visibility="visible" />        
                    android:id="@+id/ib_back"            android:layout_width="45dp"            android:layout_height="match_parent"            android:layout_alignParentLeft="true"            android:background="@drawable/bg_actionbar_selector"            android:gravity="center_vertical"            android:padding="12dp"            android:scaleType="centerCrop"            android:src="@drawable/icon_back_white" />
                    android:id="@+id/ib_notification"            android:layout_width="45dp"            android:layout_height="match_parent"            android:layout_alignParentRight="true"            android:background="@android:color/transparent"            android:gravity="center_vertical"            android:padding="10dp"            android:scaleType="centerCrop"            android:src="@drawable/icon_setting_white"            android:visibility="visible" />

我們先來理一理思路，仔細分析下有哪些功能和變化

功能分析：

1、下拉刷新，圖片放大
2、上拉標題欄漸變，返回圖片變化
3、上拉加載更多

好了，思路是有了，接下來看看如何實現(xiàn)，來看看MainActivity的具體實現(xiàn)

public class MainActivity extends AppCompatActivity implements PullToZoomListView.PullToZoomListViewListener, AbsListView.OnScrollListener {
    private Context mContext;    private PullToZoomListView ptzlv_container;    private RelativeLayout mRlTop;    private TextView tv_nick;    private ArrayAdapter mAdapter;    private RoundImageView iv_avatar;    private ImageView iv_certified;    private ImageButton ib_back;    private ImageButton ib_notification;    private ImageView mTopCerfitied;    private ViewGroup.MarginLayoutParams mRlAvatarViewLayoutParams;    private RoundImageView riv_avatar;    private RelativeLayout mRlAvatarView;    private ProgressBar pb_loading;    private View mNavHeaderView;    private View mHeaderView;
    private List adapterData = new ArrayList<>();    private boolean loadMore = false;    private int mTopAlpha;    private boolean mTopBgIsDefault = true;

    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mContext = this;        initView();        initData();
        StatusBarUtils.from(this)                .setTransparentStatusbar(true)//狀態(tài)欄是否透明                .setTransparentNavigationbar(false)//Navigationbar是否透明                .setActionbarView(mRlTop)//view是否透明                .setLightStatusBar(false)//狀態(tài)欄字體是否為亮色                .process();    }
    private void initData() {        if (loadMore) {            adapterData.add("Java");            adapterData.add("Android");            adapterData.add("IOS");            adapterData.add("Php");            adapterData.add("C");            adapterData.add("C++");            adapterData.add("C#");            adapterData.add(".NET");            adapterData.add("Ruby");            adapterData.add("Python");            adapterData.add("Go");        } else {            adapterData.add("Activity");            adapterData.add("Service");            adapterData.add("Content Provider");            adapterData.add("Intent");            adapterData.add("BroadcastReceiver");            adapterData.add("ADT");            adapterData.add("Sqlite3");            adapterData.add("HttpClient");            adapterData.add("DDMS");            adapterData.add("Android Studio");            adapterData.add("Fragment");            adapterData.add("Loader");        }        mAdapter.notifyDataSetChanged();    }
    private void initView() {        mHeaderView = View.inflate(mContext, R.layout.header_userinfo, null);        mNavHeaderView = View.inflate(mContext, R.layout.header_nav_layout, null);        riv_avatar = (RoundImageView) mHeaderView.findViewById(R.id.riv_avatar);        ptzlv_container = (PullToZoomListView) findViewById(R.id.ptzlv_container);        mRlTop = (RelativeLayout) findViewById(R.id.rl_top);        tv_nick = (TextView) findViewById(R.id.tv_nick);        iv_avatar = (RoundImageView) findViewById(R.id.iv_avatar);        iv_certified = (ImageView) findViewById(R.id.iv_certified);        ib_back = (ImageButton) findViewById(R.id.ib_back);        ib_notification = (ImageButton) findViewById(R.id.ib_notification);        mRlAvatarView = (RelativeLayout) findViewById(R.id.rl_userinfo_top_avatar);        mTopCerfitied = (ImageView) findViewById(R.id.iv_certified);        mRlTop = (RelativeLayout) findViewById(R.id.rl_top);        pb_loading = (ProgressBar) findViewById(R.id.progressBar);        mRlAvatarViewLayoutParams = (ViewGroup.MarginLayoutParams) mRlAvatarView.getLayoutParams();
        //設置背景圖        ptzlv_container.getHeaderView().setImageResource(R.drawable.icon_scroller_header);        ptzlv_container.getHeaderView().setScaleType(ImageView.ScaleType.CENTER_CROP);        //設置header大小        ptzlv_container.setHeaderViewSize(ViewGroup.LayoutParams.MATCH_PARENT, DensityUtil.dp2px(mContext, 280));        //設置headerView        ptzlv_container.getHeaderContainer().addView(mHeaderView);        ptzlv_container.setHeaderView();
        //添加headerView        ptzlv_container.addHeaderView(mNavHeaderView);        mAdapter = new ArrayAdapter(MainActivity.this,                android.R.layout.simple_list_item_1, adapterData);        //設置Adapter        ptzlv_container.setAdapter(mAdapter);
        ptzlv_container.setOnScrollListener(this);        //添加刷新監(jiān)聽和加載更多監(jiān)聽        ptzlv_container.setPullToZoomListViewListener(this);
    }
    private Handler mHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            switch (msg.what) {                case 1:                    updateImageBgUI();                    break;                case 2:                    updateImageBgUI();                    mAdapter.notifyDataSetChanged();                    break;                case 3:                    pb_loading.setVisibility(View.INVISIBLE);                    break;                case 4:                    loadMore = true;                    initData();                    ptzlv_container.setLoadFinish(true);                    break;            }        }    };

    /**     * 更新圖片背景     */    private void updateImageBgUI() {        int[] location = new int[2];        riv_avatar.getLocationOnScreen(location);        if (location[1] < 255) {            mTopBgIsDefault = false;            //mRlAvatarView  visible    //            if (location[1] <= 46 && location[1] >= 0) {    //                mRlAvatarView.setVisibility(View.VISIBLE);    //                mRlAvatarViewLayoutParams.topMargin = DensityUtil.dp2px(mContext, location[1]);    //                mRlAvatarView.setLayoutParams(mRlAvatarViewLayoutParams);    //            } else {    //                // mRlAvatarView  marginTop > 46  invisible    //                if (mRlAvatarView.getVisibility() != View.VISIBLE) {    //                    mRlAvatarView.setVisibility(View.VISIBLE);    //                }    //                // out of screen    //                if (location[1] < 0 && ((ViewGroup.MarginLayoutParams) mRlAvatarView.getLayoutParams()).topMargin != 0) {    //                    mRlAvatarViewLayoutParams.topMargin = 0;    //                    mRlAvatarView.setLayoutParams(mRlAvatarViewLayoutParams);    //                }    //                // mRlAvatarView  marginTop > 46  invisible    //                if (location[1] > 46 && mRlAvatarView.getVisibility() != View.INVISIBLE) {    //                    mRlAvatarView.setVisibility(View.INVISIBLE);    //                }    //            }
            if (ptzlv_container.getFirstVisiblePosition() >= 1 || location[1] < 0) {                if (mTopAlpha != 255) {                    mRlTop.setBackgroundColor(Color.argb(255, 66, 66, 66));                    mTopAlpha = 255;                    ib_back.setImageResource(R.drawable.icon_back_bold_white);                }            } else {                mTopAlpha = 255 - location[1];                mRlTop.setBackgroundColor(Color.argb(mTopAlpha, 66, 66, 66));                ib_back.setImageResource(R.drawable.icon_back_white);            }        } else {            setDefaultImageBg();        }    }
    /**     * 設置默認背景     */    private void setDefaultImageBg() {        if (!mTopBgIsDefault) {            mTopBgIsDefault = true;            mRlTop.setBackgroundResource(R.drawable.bg_nav_panel);            tv_nick.setTextColor(getResources().getColor(android.R.color.white));        }    }
    @Override    public void onReload() {        mHandler.removeMessages(3);        pb_loading.setVisibility(View.VISIBLE);        mHandler.sendEmptyMessageDelayed(3, 1000);        Toast.makeText(mContext, "更新中...", Toast.LENGTH_SHORT).show();    }
    @Override    public void onLoadMore() {        mHandler.removeMessages(4);        mHandler.sendEmptyMessageDelayed(4, 1000);        Toast.makeText(mContext, "加載中,請稍后...", Toast.LENGTH_SHORT).show();    }

    @Override    public void onScrollStateChanged(AbsListView view, int scrollState) {        if (scrollState == SCROLL_STATE_IDLE) {            mHandler.removeMessages(1);            mHandler.sendEmptyMessage(1);        }    }
    @Override    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {        mHandler.removeMessages(1);        mHandler.sendEmptyMessage(1);    }}

源碼地址：

https://github.com/diycoder/ParallaxHeader/tree/master

到這里就結(jié)束啦。

Android仿QQ空間動態(tài)頁及標題欄漸變

功能分析：