Android提供的ViewPager类太复杂，有时候没有必要使用，所以重写一个HorizontalScrollView来实现类似的效果，也可以当做Gallery来用
思路很简单，就是重写onTouchEvent事件，在手指抬起或者取消的时候，进行smoothScroll的操作，具体请看代码：
布局文件：activity_test.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <com.example.testxinye.MyScrollView 3 xmlns:android="http://schemas.android.com/apk/res/android" 4 android:layout_width="fill_parent" 5 android:layout_height="fill_parent" 6 > 7 <LinearLayout 8 android:id="@+id/container" 9 android:layout_width="match_parent"10 android:layout_height="match_parent"11 android:orientation="horizontal" >12 13 </LinearLayout>14 </com.example.testxinye.MyScrollView>
Activity类：TestActivity.java
1 package com.example.testxinye; 2 3 import android.app.Activity; 4 import android.graphics.Color; 5 import android.os.Bundle; 6 import android.util.DisplayMetrics; 7 import android.widget.ImageView; 8 import android.widget.ImageView.ScaleType; 9 import android.widget.LinearLayout;10 import android.widget.LinearLayout.LayoutParams;11 /**12 * 13 * @author xinye14 *15 */16 public class TestActivity extends Activity {17 private LinearLayout mContainer = null;18 @Override19 protected void onCreate(Bundle savedInstanceState) {20 // TODO Auto-generated method stub21 super.onCreate(savedInstanceState);22 setContentView(R.layout.activity_test);23 24 mContainer = (LinearLayout) findViewById(R.id.container);25 26 LayoutParams params = new LayoutParams(getWinWidth(), getWinHeight());27 28 ImageView imageView1 = new ImageView(this);29 imageView1.setLayoutParams(params);30 imageView1.setImageResource(R.drawable.call_show_medal5);31 imageView1.setScaleType(ScaleType.CENTER);32 mContainer.addView(imageView1);33 34 ImageView imageView2 = new ImageView(this);35 imageView2.setLayoutParams(params);36 imageView2.setImageResource(R.drawable.call_show_medal1);37 imageView2.setScaleType(ScaleType.CENTER);38 imageView2.setBackgroundColor(Color.RED);39 mContainer.addView(imageView2);40 41 ImageView imageView3 = new ImageView(this);42 imageView3.setLayoutParams(params);43 imageView3.setImageResource(R.drawable.call_show_medal2);44 imageView3.setScaleType(ScaleType.CENTER);45 imageView3.setBackgroundColor(Color.GRAY);46 mContainer.addView(imageView3);47 48 49 ImageView imageView4 = new ImageView(this);50 imageView4.setLayoutParams(params);51 imageView4.setImageResource(R.drawable.call_show_medal3);52 imageView4.setScaleType(ScaleType.CENTER);53 imageView4.setBackgroundColor(Color.BLUE);54 mContainer.addView(imageView4);55 56 57 ImageView imageView5 = new ImageView(this);58 imageView5.setLayoutParams(params);59 imageView5.setImageResource(R.drawable.call_show_medal4);60 imageView5.setScaleType(ScaleType.CENTER);61 imageView5.setBackgroundColor(Color.GREEN);62 mContainer.addView(imageView5);63 64 65 66 }67 68 @Override69 protected void onResume() {70 // ((MyScrollView)mContainer.getParent()).init();71 super.onResume();72 }73 74 private int getWinWidth(){75 DisplayMetrics dm = new DisplayMetrics();76 //获取屏幕信息77 getWindowManager().getDefaultDisplay().getMetrics(dm);78 return dm.widthPixels;79 }80 private int getWinHeight(){81 DisplayMetrics dm = new DisplayMetrics();82 //获取屏幕信息83 getWindowManager().getDefaultDisplay().getMetrics(dm);84 return dm.heightPixels;85 }86 }
重写的HorizontalScrollView：MyScrollView.java
1 package com.example.testxinye; 2 3 import java.util.ArrayList; 4 5 import android.content.Context; 6 import android.util.AttributeSet; 7 import android.view.MotionEvent; 8 import android.view.View; 9 import android.view.ViewGroup; 10 import android.widget.HorizontalScrollView; 11 /** 12 * 13 * @author XINYE 14 * 15 */ 16 public class MyScrollView extends HorizontalScrollView { 17 private int subChildCount = 0; 18 private ViewGroup firstChild = null; 19 private int downX = 0; 20 private int currentPage = 0; 21 private ArrayList<Integer> pointList = new ArrayList<Integer>(); 22 23 public MyScrollView(Context context, AttributeSet attrs, int defStyle) { 24 super(context, attrs, defStyle); 25 init(); 26 } 27 28 29 public MyScrollView(Context context, AttributeSet attrs) { 30 super(context, attrs); 31 init(); 32 } 33 34 public MyScrollView(Context context) { 35 super(context); 36 init(); 37 } 38 private void init() { 39 setHorizontalScrollBarEnabled(false); 40 } 41 @Override 42 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 43 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 44 receiveChildInfo(); 45 } 46 public void receiveChildInfo() { 47 48 firstChild = (ViewGroup) getChildAt(0); 49 if(firstChild != null){ 50 subChildCount = firstChild.getChildCount(); 51 for(int i = 0;i < subChildCount;i++){ 52 if(((View)firstChild.getChildAt(i)).getWidth() > 0){ 53 pointList.add(((View)firstChild.getChildAt(i)).getLeft()); 54 } 55 } 56 } 57 58 } 59 @Override 60 public boolean onTouchEvent(MotionEvent ev) { 61 switch (ev.getAction()) { 62 case MotionEvent.ACTION_DOWN: 63 downX = (int) ev.getX(); 64 break; 65 case MotionEvent.ACTION_MOVE:{ 66 67 }break; 68 case MotionEvent.ACTION_UP: 69 case MotionEvent.ACTION_CANCEL:{ 70 if( Math.abs((ev.getX() - downX)) > getWidth() / 4){ 71 if(ev.getX() - downX > 0){ 72 smoothScrollToPrePage(); 73 }else{ 74 smoothScrollToNextPage(); 75 } 76 }else{ 77 smoothScrollToCurrent(); 78 } 79 return true; 80 } 81 } 82 return super.onTouchEvent(ev); 83 } 84 85 private void smoothScrollToCurrent() { 86 smoothScrollTo(pointList.get(currentPage), 0); 87 } 88 89 private void smoothScrollToNextPage() { 90 if(currentPage < subChildCount - 1){ 91 currentPage++; 92 smoothScrollTo(pointList.get(currentPage), 0); 93 } 94 } 95 96 private void smoothScrollToPrePage() { 97 if(currentPage > 0){ 98 currentPage--; 99 smoothScrollTo(pointList.get(currentPage), 0);100 }101 }102 /**103 * 下一页104 */105 public void nextPage(){106 smoothScrollToNextPage();107 }108 /**109 * 上一页110 */111 public void prePage(){112 smoothScrollToPrePage();113 }114 /**115 * 跳转到指定的页面116 * @param page117 * @return118 */119 public boolean gotoPage(int page){120 if(page > 0 && page < subChildCount - 1){121 smoothScrollTo(pointList.get(page), 0);122 currentPage = page;123 return true;124 }125 return false;126 }127 }