Android仿京東首頁畫軸效果

更新時(shí)間：2016年12月22日 10:56:40 作者：冷不冷

這篇文章主要為大家詳細(xì)介紹了Android仿京東首頁畫軸效果，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

記得之前京東首頁有一個(gè)效果,有一個(gè)畫軸,然后可以滾動(dòng)畫軸,去打開畫(不知道怎么去形容這個(gè)效果,就叫做畫軸效果吧- -!),然后去做相關(guān)操作,剛開始看到這個(gè)效果,想法是動(dòng)態(tài)的去改變一個(gè)ImageView的高度,基本效果也就出來了,不過滾動(dòng)部分的內(nèi)容,當(dāng)時(shí)接觸的也不是很多,只是看過一些大牛的博客,略微了解了一點(diǎn),當(dāng)時(shí)也忙著寫項(xiàng)目,也就沒去多想,前些天忽然想到這個(gè)效果,就想著實(shí)現(xiàn)一下,不過京東新版本好像去掉這個(gè)東西了,只能憑著自己的記憶來大概搞一下,也是對(duì)滑動(dòng)這部分內(nèi)容的一個(gè)小練習(xí)吧.

先看一下效果圖:

一、需求分析

看到效果之后,先來分析一下:
首先是需要一個(gè)可以滑動(dòng)的畫軸,并且這個(gè)畫軸需要一定的滑動(dòng)空間,有滑動(dòng)的效果,這個(gè)用Scroller幫助完成就可以了.
然后看一下畫軸點(diǎn)擊移動(dòng)時(shí)候的背景圖,是跟隨畫軸移動(dòng),動(dòng)態(tài)改變高度的.這個(gè)用一個(gè)ImageView來搞定,設(shè)置ImageView的scaleType就可以了,不過這個(gè)地方有一些小問題,下面會(huì)說.

二、具體實(shí)現(xiàn)

簡(jiǎn)單分析完,來實(shí)現(xiàn)一下,先來做一下畫軸.創(chuàng)建一個(gè)ScrollPaintView繼承自RelativeLayout,因?yàn)樾枰欢ǖ幕瑒?dòng)空間,所以需要是一個(gè)ViewGroup.

ScrollPaintView的一些基本屬性:

public class ScrollPaintView extends RelativeLayout {
 /**
 * TAG
 */
 private static final String TAG = "ScrollPaintView";
 /**
 * 默認(rèn)滾軸高度
 */
 private final int DEFAULT_PAINT_SCROLL_HEIGHT = 25;
 /**
 * 默認(rèn)滾動(dòng)的速度
 */
 private final int DEFAULT_SCROLL_SPEED = 1000;
 /**
 * 默認(rèn)分割點(diǎn)高度
 */
 private final int DEFAULT_PARTITION_NODE = 150;
 /**
 * 默認(rèn)畫軸文字大小
 */
 private final int DEFAULT_PAINT_SCROLL_TXT_SIZE = 16;
 /**
 * Scroller
 */
 private Scroller mScroller;
 /**
 * 滾軸Iv
 */
 private ImageView mPaintScrollImageView;
 /**
 * 滾軸Tv
 */
 private TextView mPaintScrollTextView;
 /**
 * 圖畫Iv
 */
 private ImageView mPaintView;
 /**
 * 畫軸圖
 */
 private Bitmap mPaintScrollBp;
 /**
 * 畫軸高度
 */
 private int mPaintIvHeight;
 /**
 * 畫軸文字
 */
 private String mPaintScrollTxt;
 /**
 * 畫軸文字大小
 */
 private float mPaintScrollTxtSize;
 /**
 * 畫軸文字顏色
 */
 private int mPaintScrollTxtColor;
 /**
 * 圖畫開始時(shí)的高度
 */
 private int mPaintStartHeight;
 /**
 * 上一次獲取的Y
 */
 private int mLastY;
 /**
 * 滾動(dòng)速度
 */
 private int mScrollSpeed;
 /**
 * 分隔節(jié)點(diǎn)
 */
 private int partitionNode;
 /**
 * 是否是向上滾動(dòng)
 */
 private boolean isScrllerTop = false;
 /**
 * 是否正在點(diǎn)擊
 */
 private boolean isClick = false;
 /**
 * 布局參數(shù)
 */
 private LayoutParams lpp;
 /**
 * 屏幕高度
 */
 private int screenHeight;
 /**
 * 屏幕寬度
 */
 private int screenWidth;
 /**
 * 回調(diào)監(jiān)聽
 */
 private ScrollPaintCompleteListener listener;
 /**
 * 上一次滾動(dòng)的Y值
 */
 private int lastScrollY;

 /**
 * 構(gòu)造方法
 */
 public ScrollPaintView(Context context, AttributeSet attrs, int defStyleAttr) {
 super(context, attrs, defStyleAttr);
 // 獲取屬性
 TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.ScrollPaintView);
 mPaintIvHeight = (int) ta.getDimension(R.styleable.ScrollPaintView_paintScrollHeight, TypedValue.applyDimension(
  TypedValue.COMPLEX_UNIT_DIP, DEFAULT_PAINT_SCROLL_HEIGHT, getResources().getDisplayMetrics()));
 mScrollSpeed = ta.getInteger(R.styleable.ScrollPaintView_scrollSpeed, DEFAULT_SCROLL_SPEED);
 partitionNode = ta.getInteger(R.styleable.ScrollPaintView_scrollPartitionNode, DEFAULT_PARTITION_NODE);
 mPaintScrollBp = drawableToBitamp(ta.getDrawable(R.styleable.ScrollPaintView_paintScrollSrc));
 mPaintScrollTxt = ta.getString(R.styleable.ScrollPaintView_paintScrollTxt);
 mPaintScrollTxtColor = ta.getColor(R.styleable.ScrollPaintView_paintScrollTxtColor, Color.BLACK);
 mPaintScrollTxtSize = px2sp(ta.getDimensionPixelSize(R.styleable.ScrollPaintView_paintScrollTxtSize, DEFAULT_PAINT_SCROLL_TXT_SIZE));
 ta.recycle();
 }
}

看一下創(chuàng)建畫軸:

 /**
 * 創(chuàng)建滾軸
 */
 private void makePaintScroll() {
 // 如果已經(jīng)存在,則不再創(chuàng)建
 if (null != mPaintScrollImageView || null != mPaintScrollTextView) {
  return;
 }
 // 創(chuàng)建滾軸
 mPaintScrollImageView = new ImageView(getContext());
 LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
 lp.height = mPaintIvHeight;
 mPaintScrollImageView.setLayoutParams(lp);
 mPaintScrollImageView.setScaleType(ImageView.ScaleType.FIT_XY);
 mPaintScrollImageView.setImageBitmap(null == mPaintScrollBp ? makeDefaultScroll() : mPaintScrollBp);
 addView(mPaintScrollImageView);
 // 創(chuàng)建文字
 mPaintScrollTextView = new TextView(getContext());
 LayoutParams lpt = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
 lpt.height = mPaintIvHeight;
 mPaintScrollTextView.setLayoutParams(lpt);
 mPaintScrollTextView.setText(null == mPaintScrollTxt ? "" : mPaintScrollTxt);
 mPaintScrollTextView.setTextSize(mPaintScrollTxtSize);
 mPaintScrollTextView.setTextColor(mPaintScrollTxtColor);
 mPaintScrollTextView.setGravity(Gravity.CENTER);
 addView(mPaintScrollTextView);
 }

 /**
 * 設(shè)置默認(rèn)的滾軸
 *
 * @return
 */
 private Bitmap makeDefaultScroll() {
 Bitmap defaultBp = Bitmap.createBitmap(screenWidth, mPaintIvHeight,
  Bitmap.Config.ARGB_8888);
 //填充顏色
 defaultBp.eraseColor(Color.parseColor("#FF0000"));
 return defaultBp;

 }

創(chuàng)建了一個(gè)畫軸ImageView和一個(gè)文字TextView作為初始的畫軸,如果沒有傳入畫軸的圖片,則默認(rèn)去創(chuàng)建一個(gè)畫軸.不難理解,接著去配合Scroller,讓畫軸滾動(dòng)起來.

簡(jiǎn)單滾動(dòng):

 /**
 * 處理View
 */
 private void handleView() {
 // 初始化Scroller
 mScroller = new Scroller(getContext());
 // 畫軸點(diǎn)擊效果
 mPaintScrollImageView.setOnTouchListener(new OnTouchListener() {
  @Override
  public boolean onTouch(View view, MotionEvent event) {
  int x = (int) event.getRawX();
  int y = (int) event.getRawY();
  int action = event.getAction();
  switch (action) {
   case MotionEvent.ACTION_DOWN: 
   isClick = true;
   mLastY = y;
   if (!mScroller.isFinished()) { // 如果上次的調(diào)用沒有執(zhí)行完就取消。
    mScroller.abortAnimation();
   }
   return true;
   case MotionEvent.ACTION_MOVE: 
   // 移動(dòng)的距離
   int dy = y - mLastY;
   mLastY = y;
   // 滑動(dòng)
   scrollBy(0, -dy);
   return true;
   case MotionEvent.ACTION_UP:
   mScroller.startScroll(getScrollX(), getScrollY(), -getScrollX(), -getScrollY(), 1000);
   invalidate();
   return true;
  }
  return false;
  }
 });
 }

 /**
 * 滑動(dòng)處理
 */
 @Override
 public void computeScroll() {
 if (mScroller.computeScrollOffset()) { // 計(jì)算新位置，并判斷上一個(gè)滾動(dòng)是否完成。 
  scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
  invalidate();
  }
 }

這樣滑動(dòng)處理就做完了,在布局中引用一下,看一下效果

activity_main:

 <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="#eeeeee"
 tools:context="com.example.junweiliu.scrollpaintdemo.MainActivity">
  <!--畫軸控件-->
 <com.example.junweiliu.scrollpaintdemo.widget.ScrollPaintView
  android:id="@+id/spv_paint"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  app:paintScrollHeight="25dp"
  app:paintScrollSrc="@mipmap/paint_scroll_img"
  app:paintScrollTxt="拉我看看"
  app:paintScrollTxtColor="#FF000000"
  app:paintScrollTxtSize="16sp"
 >
 </com.example.junweiliu.scrollpaintdemo.widget.ScrollPaintView>
</RelativeLayout>

效果圖:

滾動(dòng)條基本能用了,接著來設(shè)置一個(gè)ImageView來配合使用下,先獲取到一個(gè)ImageView,然后拖動(dòng)畫軸時(shí),來動(dòng)態(tài)改變ImageView的高度,在做這部分內(nèi)容前,先來考慮下,因?yàn)樾枨笮枰氖菆D畫整體不會(huì)變形,是一點(diǎn)一點(diǎn)拉開的感覺,就像是打開一幅畫一樣,那么用哪種scaleType能滿足呢.試了好多種,來分別看一下:

相關(guān)代碼:

提供一個(gè)設(shè)置ImageView的方法
在MotionEvent.ACTION_MOVE:中動(dòng)態(tài)改變ImageView的高度
滑動(dòng)時(shí)動(dòng)態(tài)改變ImageView的高度

 /**
 * 設(shè)置paintView
 *
 * @param paintView
 */
 public void setPaintView(ImageView paintView) {
 if (null == paintView) {
  Log.e(TAG, "設(shè)置的View為空");
  return;
 }
 mPaintView = paintView;
 }

MotionEvent.ACTION_MOVE:

 // 滑動(dòng)處理 
 case MotionEvent.ACTION_MOVE: 
 ...
 // 動(dòng)態(tài)改變高度
 if (Math.abs(getScrollY()) > 0) {
    lpp.height = mPaintStartHeight + Math.abs(getScrollY());
    mPaintView.setLayoutParams(lpp);
   }

滑動(dòng)處理:

 /**
 * 滑動(dòng)處理
 */
 @Override
 public void computeScroll() {
 if (mScroller.computeScrollOffset()) { // 計(jì)算新位置，并判斷上一個(gè)滾動(dòng)是否完成。
  // 請(qǐng)求處理點(diǎn)擊事件,防止父控件滑動(dòng)
  requestDisallowInterceptTouchEvent(true);
  scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
  // 重新設(shè)置顯示的控件高度
  if (0 < Math.abs(mScroller.getCurrY())) {
  if (!isScrllerTop) {
   lpp.height = mPaintStartHeight + Math.abs(mScroller.getCurrY()) + mPaintIvHeight / 2;
  } else {
   lpp.height = mPaintStartHeight + Math.abs(mScroller.getCurrY()) - mPaintIvHeight / 2;
  }
  } else {
  lpp.height = mPaintStartHeight;
  }
  mPaintView.setLayoutParams(lpp);
  invalidate();
 }
}

設(shè)置不同scaleType效果,簡(jiǎn)單試幾個(gè)效果:

fitXY:

這里寫圖片描述

centerCrop:

這里寫圖片描述

matrix:

這里寫圖片描述

觀察一下,好像那個(gè)效果都不是很好,不過matrix拉開的效果和預(yù)期需要的是一樣的,不過用matrix之后,就沒有辦法設(shè)置其他scaleType了,沒辦法把圖片進(jìn)行縮放了,這腫么辦呢,其實(shí)很簡(jiǎn)單,只需要把顯示的圖片提前進(jìn)行一下縮放就可以了.

處理圖片相關(guān):

 /**
 * 設(shè)置paintView
 *
 * @param paintView
 */
 public void setPaintView(ImageView paintView) {
 if (null == paintView) {
  Log.e(TAG, "設(shè)置的View為空");
  return;
 }
 // 處理圖片,對(duì)圖片按照屏幕寬高比進(jìn)行縮放
 Bitmap bp = drawableToBitamp(paintView.getDrawable());
 paintView.setImageBitmap(scaleBitmal(bp));
 // 設(shè)置縮放形式
 paintView.setScaleType(ImageView.ScaleType.MATRIX);
 mPaintView = paintView;
 }
 /**
 * drawable轉(zhuǎn)bitmap
 *
 * @param drawable
 * @return
 */
 private Bitmap drawableToBitamp(Drawable drawable) {
 if (null == drawable) {
  return null;
 }
 if (drawable instanceof BitmapDrawable) {
  BitmapDrawable bd = (BitmapDrawable) drawable;
  return bd.getBitmap();
 }
 int w = drawable.getIntrinsicWidth();
 int h = drawable.getIntrinsicHeight();
 Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
 Canvas canvas = new Canvas(bitmap);
 drawable.setBounds(0, 0, w, h);
 drawable.draw(canvas);
 return bitmap;
 }


 /**
 * 按照屏幕寬高縮放圖片
 *
 * @param bp
 * @return
 */
 private Bitmap scaleBitmal(Bitmap bp) {
 // 寬度比例
 float scaleW = (float) screenWidth / (float) bp.getWidth();
 // 高度比例
 float scaleH = (float) screenHeight / (float) bp.getHeight();
 // 矩陣,用于縮放圖片
 Matrix matrix = new Matrix();
 matrix.postScale(scaleW, scaleH);
 // 縮放后的圖片
 Bitmap scaleBp = Bitmap.createBitmap(bp, 0, 0, bp.getWidth(), bp.getHeight(), matrix, true);
 return scaleBp;
 }

看一下效果:

這里寫圖片描述

效果還不錯(cuò),接下來就是做一下細(xì)節(jié)上的處理,設(shè)置一個(gè)臨界點(diǎn),讓畫軸向上或者向下滾動(dòng),設(shè)置邊界點(diǎn),讓畫軸不越界等等.還有一般都是在ScrollView中使用到這個(gè)效果,所以要去處理一下事件沖突,當(dāng)然還有去重寫一下onMeasure方法,不然會(huì)出現(xiàn)不顯示的情況.(相信大家也遇到過ScrollView里邊嵌套ListView導(dǎo)致ListView顯示不全)這里就不再詳細(xì)介紹了.直接貼下代碼.

三、完整代碼

MainActivity:

package com.example.junweiliu.scrollpaintdemo;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.junweiliu.scrollpaintdemo.widget.ScrollPaintView;

public class MainActivity extends AppCompatActivity {
  private static final String TAG = "MainActivity";
  /**
   * 需要顯示的IV
   */
  private ImageView mPaintIv;
  /**
   * 畫軸
   */
  private ScrollPaintView mScrollPaintView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();

  }

  /**
   * 初始化控件
   */
  private void initView() {
    mPaintIv = (ImageView) findViewById(R.id.iv_paint);
    mScrollPaintView = (ScrollPaintView) findViewById(R.id.spv_paint);
    mScrollPaintView.setPaintView(mPaintIv);
    mPaintIv.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        Toast.makeText(MainActivity.this, "功夫!", Toast.LENGTH_SHORT).show();
      }
    });
    mScrollPaintView.setScrollPaintCompleteListener(new ScrollPaintView.ScrollPaintCompleteListener() {
      @Override
      public void onScrollTouch(TextView tv) {
        mPaintIv.setVisibility(View.VISIBLE);
      }

      @Override
      public void onScrollTop(TextView tv) {
//        Log.e(TAG, "收縮了");
        tv.setText("拉我看看");
        if (View.VISIBLE == mPaintIv.getVisibility()) {
          mPaintIv.setVisibility(View.GONE);
        }
      }

      @Override
      public void onScrollBottom(TextView tv) {
//        Log.e(TAG, "展開了");
        tv.setText("到底了");
        Intent intent = new Intent(MainActivity.this, DetailActivity.class);
        startActivity(intent);
        // 延遲800毫秒重置位置
        new Handler(new Handler.Callback() {
          @Override
          public boolean handleMessage(Message message) {
            mScrollPaintView.replaceScroll();
            return false;
          }
        }).sendEmptyMessageDelayed(0, 600);
      }

      @Override
      public void onScrollMove(TextView tv) {
//        Log.e(TAG, "移動(dòng)了");
        tv.setText("請(qǐng)上下拖動(dòng)");
      }
    });
  }
}

ScrollPaintView:

package com.example.junweiliu.scrollpaintdemo.widget;

import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.Scroller;
import android.widget.TextView;

import com.example.junweiliu.scrollpaintdemo.R;

/**
 * Created by junweiliu on 16/12/10.
 */
public class ScrollPaintView extends RelativeLayout {
  /**
   * TAG
   */
  private static final String TAG = "ScrollPaintView";
  /**
   * 默認(rèn)滾軸高度
   */
  private final int DEFAULT_PAINT_SCROLL_HEIGHT = 25;
  /**
   * 默認(rèn)滾動(dòng)的速度
   */
  private final int DEFAULT_SCROLL_SPEED = 1000;
  /**
   * 默認(rèn)分割點(diǎn)高度
   */
  private final int DEFAULT_PARTITION_NODE = 150;
  /**
   * 默認(rèn)畫軸文字大小
   */
  private final int DEFAULT_PAINT_SCROLL_TXT_SIZE = 16;
  /**
   * Scroller
   */
  private Scroller mScroller;
  /**
   * 滾軸Iv
   */
  private ImageView mPaintScrollImageView;
  /**
   * 滾軸Tv
   */
  private TextView mPaintScrollTextView;
  /**
   * 圖畫Iv
   */
  private ImageView mPaintView;
  /**
   * 畫軸圖
   */
  private Bitmap mPaintScrollBp;
  /**
   * 畫軸高度
   */
  private int mPaintIvHeight;
  /**
   * 畫軸文字
   */
  private String mPaintScrollTxt;
  /**
   * 畫軸文字大小
   */
  private float mPaintScrollTxtSize;
  /**
   * 畫軸文字顏色
   */
  private int mPaintScrollTxtColor;
  /**
   * 圖畫開始時(shí)的高度
   */
  private int mPaintStartHeight;
  /**
   * 上一次獲取的Y
   */
  private int mLastY;
  /**
   * 滾動(dòng)速度
   */
  private int mScrollSpeed;
  /**
   * 分隔節(jié)點(diǎn)
   */
  private int partitionNode;
  /**
   * 是否是向上滾動(dòng)
   */
  private boolean isScrllerTop = false;
  /**
   * 是否正在點(diǎn)擊
   */
  private boolean isClick = false;
  /**
   * 布局參數(shù)
   */
  private LayoutParams lpp;
  /**
   * 屏幕高度
   */
  private int screenHeight;
  /**
   * 屏幕寬度
   */
  private int screenWidth;
  /**
   * 回調(diào)監(jiān)聽
   */
  private ScrollPaintCompleteListener listener;
  /**
   * 上一次滾動(dòng)的Y值
   */
  private int lastScrollY;

  /**
   * 回調(diào)接口
   */
  public interface ScrollPaintCompleteListener {
    /**
     * 點(diǎn)擊時(shí)的回調(diào)
     */
    public void onScrollTouch(TextView tv);

    /**
     * 收縮時(shí)的回調(diào)
     */
    public void onScrollTop(TextView tv);

    /**
     * 展開時(shí)的回調(diào)
     */
    public void onScrollBottom(TextView tv);

    /**
     * 滾動(dòng)中的回調(diào)
     */
    public void onScrollMove(TextView tv);

  }


  public ScrollPaintView(Context context) {
    this(context, null);
  }

  public ScrollPaintView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
  }

  public ScrollPaintView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    // 獲取屬性
    TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.ScrollPaintView);
    mPaintIvHeight = (int) ta.getDimension(R.styleable.ScrollPaintView_paintScrollHeight, TypedValue.applyDimension(
        TypedValue.COMPLEX_UNIT_DIP, DEFAULT_PAINT_SCROLL_HEIGHT, getResources().getDisplayMetrics()));
    mScrollSpeed = ta.getInteger(R.styleable.ScrollPaintView_scrollSpeed, DEFAULT_SCROLL_SPEED);
    partitionNode = ta.getInteger(R.styleable.ScrollPaintView_scrollPartitionNode, DEFAULT_PARTITION_NODE);
    mPaintScrollBp = drawableToBitamp(ta.getDrawable(R.styleable.ScrollPaintView_paintScrollSrc));
    mPaintScrollTxt = ta.getString(R.styleable.ScrollPaintView_paintScrollTxt);
    mPaintScrollTxtColor = ta.getColor(R.styleable.ScrollPaintView_paintScrollTxtColor, Color.BLACK);
    mPaintScrollTxtSize = px2sp(ta.getDimensionPixelSize(R.styleable.ScrollPaintView_paintScrollTxtSize, DEFAULT_PAINT_SCROLL_TXT_SIZE));
    ta.recycle();
    init();
    makePaintScroll();
    handleView();
  }

  /**
   * 設(shè)置paintView
   *
   * @param paintView
   */
  public void setPaintView(ImageView paintView) {
    if (null == paintView) {
      Log.e(TAG, "設(shè)置的View為空");
      return;
    }
    // 處理圖片,對(duì)圖片按照屏幕寬高比進(jìn)行縮放
    Bitmap bp = drawableToBitamp(paintView.getDrawable());
    paintView.setImageBitmap(scaleBitmal(bp));
    // 設(shè)置縮放形式
    paintView.setScaleType(ImageView.ScaleType.MATRIX);
    mPaintView = paintView;
  }

  /**
   * 設(shè)置回調(diào)
   */
  public void setScrollPaintCompleteListener(ScrollPaintCompleteListener listener) {
    if (null != listener) {
      this.listener = listener;
    }
  }

  /**
   * 初始化
   */
  private void init() {
    mScroller = new Scroller(getContext());
    lpp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
    // 獲取屏幕信息
    DisplayMetrics displayMetrics = new DisplayMetrics();
    ((Activity) getContext()).getWindowManager().getDefaultDisplay()
        .getMetrics(displayMetrics);
    // 屏幕高度
    screenHeight = displayMetrics.heightPixels;
    // 屏幕寬度
    screenWidth = displayMetrics.widthPixels;
  }


  /**
   * 創(chuàng)建滾軸
   */
  private void makePaintScroll() {
    // 如果已經(jīng)存在,則不再創(chuàng)建
    if (null != mPaintScrollImageView || null != mPaintScrollTextView) {
      return;
    }
    // 創(chuàng)建滾軸
    mPaintScrollImageView = new ImageView(getContext());
    LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
    lp.height = mPaintIvHeight;
    mPaintScrollImageView.setLayoutParams(lp);
    mPaintScrollImageView.setScaleType(ImageView.ScaleType.FIT_XY);
    mPaintScrollImageView.setImageBitmap(null == mPaintScrollBp ? makeDefaultScroll() : mPaintScrollBp);
    addView(mPaintScrollImageView);
    // 創(chuàng)建文字
    mPaintScrollTextView = new TextView(getContext());
    LayoutParams lpt = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
    lpt.height = mPaintIvHeight;
    mPaintScrollTextView.setLayoutParams(lpt);
    mPaintScrollTextView.setText(null == mPaintScrollTxt ? "" : mPaintScrollTxt);
    mPaintScrollTextView.setTextSize(mPaintScrollTxtSize);
    mPaintScrollTextView.setTextColor(mPaintScrollTxtColor);
    mPaintScrollTextView.setGravity(Gravity.CENTER);
    addView(mPaintScrollTextView);
  }


  /**
   * 測(cè)量方法
   *
   * @param widthMeasureSpec
   * @param heightMeasureSpec
   */
  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    if (null != mPaintView && getTop() + mPaintIvHeight != mPaintView.getHeight()) {
      // 重新設(shè)置圖畫高度
      mPaintStartHeight = getTop() + mPaintIvHeight / 2;
      lpp.height = mPaintStartHeight;
      mPaintView.setLayoutParams(lpp);
    }
    // 測(cè)量狀態(tài)欄高度
    Rect frame = new Rect();
    ((Activity) getContext()).getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
    int statusBarHeight = frame.top;
    // 高度為屏幕高度減去狀態(tài)欄高度和top的高度
    setMeasuredDimension(screenWidth, screenHeight - getTop() - statusBarHeight);
  }

  /**
   * 處理View
   */
  private void handleView() {
    mPaintScrollImageView.setOnTouchListener(new OnTouchListener() {
      @Override
      public boolean onTouch(View view, MotionEvent event) {
        if (null == mPaintView) {
          Log.e(TAG, "設(shè)置的View為空");
          return true;
        }
        // 獲取點(diǎn)擊的XY坐標(biāo)
        int x = (int) event.getRawX();
        int y = (int) event.getRawY();
        int action = event.getAction();
        switch (action) {
          case MotionEvent.ACTION_DOWN: {
            // 請(qǐng)求處理點(diǎn)擊事件
            requestDisallowInterceptTouchEvent(true);
            isClick = true;
            mLastY = y;
            if (!mScroller.isFinished()) { // 如果上次的調(diào)用沒有執(zhí)行完就取消。
              mScroller.abortAnimation();
            }
            if (null != listener) {
              listener.onScrollTouch(mPaintScrollTextView);
            }
            return true;
          }
          case MotionEvent.ACTION_MOVE: {
            // 移動(dòng)的距離
            int dy = y - mLastY;
            mLastY = y;
            // 滑動(dòng)
            scrollBy(0, -dy);
            // 如果是向上滑動(dòng)并且是在初始位置,則不去做處理
            if (getScrollY() >= 0 && dy <= 0) {
              lpp.height = mPaintStartHeight;
              mPaintView.setLayoutParams(lpp);
              scrollTo(0, 0);
              return true;
            }
            // 如果是向下滑動(dòng)并且超過屏幕高度,則不去處理
            if (Math.abs(getScrollY()) >= getHeight() - mPaintIvHeight && dy >= 0) {
              lpp.height = mPaintStartHeight + getHeight() - mPaintIvHeight;
              mPaintView.setLayoutParams(lpp);
              scrollTo(0, -(getHeight() - mPaintIvHeight));
              return true;
            }
            // 滾動(dòng)回調(diào)
            if (null != listener) {
              listener.onScrollMove(mPaintScrollTextView);
            }
            // 重新設(shè)置顯示的控件高度
            if (Math.abs(getScrollY()) > 0) {
              lpp.height = mPaintStartHeight + Math.abs(getScrollY());
              mPaintView.setLayoutParams(lpp);
            }
            return true;
          }
          case MotionEvent.ACTION_UP:
            // 恢復(fù)事件處理
            requestDisallowInterceptTouchEvent(false);
            isClick = false;
            // 沒有發(fā)生移動(dòng)
            if (getScrollY() >= 0) {
              if (null != listener) {
                listener.onScrollTop(mPaintScrollTextView);
              }
              return true;
            }
            if (-getScrollY() < partitionNode) {  // 如果小于臨界值,則返回起始坐標(biāo)
              // XY都從滑動(dòng)的距離回去，最后一個(gè)參數(shù)是多少毫秒內(nèi)執(zhí)行完這個(gè)動(dòng)作。
              isScrllerTop = true;
              mScroller.startScroll(getScrollX(), getScrollY(), -getScrollX(), -getScrollY(), mScrollSpeed);
            } else {  // 如果大于臨界值,則展開
              isScrllerTop = false;
              mScroller.startScroll(getScrollX(), getScrollY(), -getScrollX(), -(getHeight() - (-getScrollY()) - mPaintIvHeight), mScrollSpeed);
            }
            invalidate();
            return true;
        }
        return false;
      }
    });
  }


  /**
   * 滑動(dòng)處理
   */
  @Override
  public void computeScroll() {
    if (mScroller.computeScrollOffset()) { // 計(jì)算新位置，并判斷上一個(gè)滾動(dòng)是否完成。
      // 請(qǐng)求處理點(diǎn)擊事件,防止父控件滑動(dòng)
      requestDisallowInterceptTouchEvent(true);
      scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
      // 重新設(shè)置顯示的控件高度
      if (0 < Math.abs(mScroller.getCurrY())) {
        if (!isScrllerTop) {
          lpp.height = mPaintStartHeight + Math.abs(mScroller.getCurrY()) + mPaintIvHeight / 2;
        } else {
          lpp.height = mPaintStartHeight + Math.abs(mScroller.getCurrY()) - mPaintIvHeight / 2;
        }
      } else {
        lpp.height = mPaintStartHeight;
      }
      mPaintView.setLayoutParams(lpp);
      invalidate();
    } else {
      // 重新設(shè)置畫圖高度,防止高度異常
      if (mPaintView.getHeight() > mPaintStartHeight + Math.abs(mScroller.getCurrY()) && !isScrllerTop && mScroller.getStartY() > 0) {
        lpp.height = mPaintStartHeight + Math.abs(mScroller.getCurrY());
        mPaintView.setLayoutParams(lpp);
      }
    }
    // 防止多次調(diào)用
    if (lastScrollY != mScroller.getCurrY()) {
      // 收縮完成
      if (mScroller.getCurrY() >= 0 && !isClick) {
        if (null != listener) {
          listener.onScrollTop(mPaintScrollTextView);
        }
      }
      // 展開完成
      if (-mScroller.getCurrY() >= getHeight() - mPaintIvHeight && !isClick) {
        if (null != listener) {
          listener.onScrollBottom(mPaintScrollTextView);
        }
      }
      lastScrollY = mScroller.getCurrY();
    }
  }

  /**
   * 重置滾動(dòng)
   */
  public void replaceScroll() {
    // 重置信息
    scrollTo(0, 0);
    mScroller.setFinalY(0);
    lastScrollY = 0;
    lpp.height = mPaintStartHeight;
    mPaintView.setLayoutParams(lpp);
    if (null != listener) {
      listener.onScrollTop(mPaintScrollTextView);
    }
  }

  /**
   * drawable轉(zhuǎn)bitmap
   *
   * @param drawable
   * @return
   */
  private Bitmap drawableToBitamp(Drawable drawable) {
    if (null == drawable) {
      return null;
    }
    if (drawable instanceof BitmapDrawable) {
      BitmapDrawable bd = (BitmapDrawable) drawable;
      return bd.getBitmap();
    }
    int w = drawable.getIntrinsicWidth();
    int h = drawable.getIntrinsicHeight();
    Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    drawable.setBounds(0, 0, w, h);
    drawable.draw(canvas);
    return bitmap;
  }


  /**
   * 按照屏幕寬高縮放圖片
   *
   * @param bp
   * @return
   */
  private Bitmap scaleBitmal(Bitmap bp) {
    // 寬度比例
    float scaleW = (float) screenWidth / (float) bp.getWidth();
    // 高度比例
    float scaleH = (float) screenHeight / (float) bp.getHeight();
    // 矩陣,用于縮放圖片
    Matrix matrix = new Matrix();
    matrix.postScale(scaleW, scaleH);
    // 縮放后的圖片
    Bitmap scaleBp = Bitmap.createBitmap(bp, 0, 0, bp.getWidth(), bp.getHeight(), matrix, true);
    return scaleBp;
  }

  /**
   * 設(shè)置默認(rèn)的滾軸
   *
   * @return
   */
  private Bitmap makeDefaultScroll() {
    Bitmap defaultBp = Bitmap.createBitmap(screenWidth, mPaintIvHeight,
        Bitmap.Config.ARGB_8888);
    //填充顏色
    defaultBp.eraseColor(Color.parseColor("#FF0000"));
    return defaultBp;

  }


  /**
   * 將px值轉(zhuǎn)換為sp值，保證文字大小不變
   */
  public int px2sp(float pxValue) {
    final float fontScale = getContext().getResources().getDisplayMetrics().scaledDensity;
    return (int) (pxValue / fontScale + 0.5f);
  }

}

activity_main:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#eeeeee"
    tools:context="com.example.junweiliu.scrollpaintdemo.MainActivity">
  <ScrollView
      android:layout_width="match_parent"
      android:layout_height="match_parent">
    <RelativeLayout android:layout_width="match_parent"
            android:layout_height="match_parent">
      <!--頭部圖片部分-->
      <ImageView
          android:id="@+id/iv_banner"
          android:layout_width="match_parent"
          android:layout_height="200dp"
          android:scaleType="fitXY"
          android:src="@mipmap/show_banner"/>
      <!--中間內(nèi)容部分-->
      <LinearLayout
          android:id="@+id/ll_first"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_below="@+id/iv_banner"
          android:layout_marginTop="20dp"
          android:orientation="horizontal"
          android:padding="16dp">
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_a"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="藝術(shù)片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_b"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="懷舊片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_c"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="科幻片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_d"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="動(dòng)畫片"
              android:textColor="#666666"/>
        </LinearLayout>
      </LinearLayout>
      <LinearLayout
          android:id="@+id/ll_sencond"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_below="@+id/ll_first"
          android:layout_marginTop="20dp"
          android:orientation="horizontal"
          android:padding="16dp">
        <LinearLayout

            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_a"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="藝術(shù)片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_b"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="懷舊片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_c"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="科幻片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_d"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="動(dòng)畫片"
              android:textColor="#666666"/>
        </LinearLayout>
      </LinearLayout>
      <LinearLayout
          android:id="@+id/ll_threeth"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_below="@+id/ll_sencond"
          android:layout_marginTop="20dp"
          android:orientation="horizontal"
          android:padding="16dp">
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_a"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="藝術(shù)片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_b"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="懷舊片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_c"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="科幻片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_d"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="動(dòng)畫片"
              android:textColor="#666666"/>
        </LinearLayout>
      </LinearLayout>
      <LinearLayout
          android:id="@+id/ll_fourth"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_below="@+id/ll_threeth"
          android:layout_marginTop="20dp"
          android:orientation="horizontal"
          android:padding="16dp">
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_a"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="藝術(shù)片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_b"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="懷舊片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="16dp"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_c"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="科幻片"
              android:textColor="#666666"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:orientation="vertical">
          <ImageView
              android:layout_width="80dp"
              android:layout_height="120dp"
              android:scaleType="fitXY"
              android:src="@mipmap/movie_playbill_d"/>
          <TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_marginTop="10dp"
              android:gravity="center"
              android:text="動(dòng)畫片"
              android:textColor="#666666"/>
        </LinearLayout>
      </LinearLayout>

      <!--需要顯示的圖-->
      <ImageView
          android:id="@+id/iv_paint"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:scaleType="matrix"
          android:src="@mipmap/show_img"
          android:visibility="gone"/>
      <!--畫軸控件-->
      <com.example.junweiliu.scrollpaintdemo.widget.ScrollPaintView
          android:id="@+id/spv_paint"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:layout_below="@+id/iv_banner"
          app:paintScrollHeight="25dp"
          app:paintScrollSrc="@mipmap/paint_scroll_img"
          app:paintScrollTxt="拉我看看"
          app:paintScrollTxtColor="#FF000000"
          app:paintScrollTxtSize="16sp"
      >
      </com.example.junweiliu.scrollpaintdemo.widget.ScrollPaintView>
    </RelativeLayout>
  </ScrollView>
</RelativeLayout>

attr:

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <!--畫軸的高度-->
  <attr name="paintScrollHeight" format="dimension"/>
  <!--畫軸的圖片-->
  <attr name="paintScrollSrc" format="reference"/>
  <!--畫軸文字-->
  <attr name="paintScrollTxt" format="string"/>
  <!--畫軸文字顏色-->
  <attr name="paintScrollTxtColor" format="color"/>
  <!--畫軸文字大小-->
  <attr name="paintScrollTxtSize" format="dimension"/>
  <!--滾動(dòng)速度-->
  <attr name="scrollSpeed" format="integer"/>
  <!--分割節(jié)點(diǎn)-->
  <attr name="scrollPartitionNode" format="integer"/>
  <declare-styleable name="ScrollPaintView">
    <attr name="paintScrollHeight"/>
    <attr name="paintScrollSrc"/>
    <attr name="paintScrollTxt"/>
    <attr name="paintScrollTxtColor"/>
    <attr name="paintScrollTxtSize"/>
    <attr name="scrollSpeed"/>
    <attr name="scrollPartitionNode"/>
  </declare-styleable>
</resources>

四、問題

滾動(dòng)的時(shí)間不宜設(shè)置太短,因?yàn)閯?dòng)態(tài)設(shè)置ImageView高度時(shí)可能出現(xiàn)繪制速度趕不上滾動(dòng)的速度,會(huì)出現(xiàn)錯(cuò)位,當(dāng)然時(shí)間設(shè)置太短,也看不到這種滑動(dòng)的效果了.暫時(shí)想到的做法就是這樣,應(yīng)該還會(huì)有更好的方法.

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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