android中无限循环滑动的gallery实例

1.点击图片有变暗的效果，使用imageview.setAlpha(),并且添加ontouchListener

 1 public void init() { 2         dots = new ImageView[len]; 3         for (int j = 0; j < len; j++) { 4             // 添加图片 5             final ImageView iv = new ImageView(this); 6             iv.setImageResource(res[j]); 7             views.add(iv); 8             iv.setOnTouchListener(new OnTouchListener() { 9 10                 @Override11                 public boolean onTouch(View v, MotionEvent event) {12                     if (event.getAction() == MotionEvent.ACTION_DOWN) {13                         iv.setAlpha(70);14                         slideHandler.removeCallbacks(slideRun);15                     }16                     return false;17                 }18             });19             // 添加索引20             ImageView imageView = new ImageView(this);21             imageView.setLayoutParams(new LayoutParams(15, 15));22             dots[j] = imageView;23             TextView tv = new TextView(this);24             tv.setText("  ");25             if (j == 0) {26                 // 默认进入程序后第一张图片被选中;27                 dots[j].setBackgroundResource(R.drawable.yst_i_pageon);28             } else {29                 dots[j].setBackgroundResource(R.drawable.yst_i_pageoff);30             }31 32             layout_point.addView(tv);33             layout_point.addView(imageView);34         }35         gallery.setAdapter(new ImageAdapter());36         gallery.setSelection((Integer.MAX_VALUE / 2) - (Integer.MAX_VALUE / 2)37                 % len);38         gallery.setOnItemSelectedListener(selectListener);39         ((MyGallery) gallery).setViews(views);40         // TODO 定时滑动41         startSlide();42     }

2.无限滑动，自定义adapter,设置count为最大值，图片总数循环从0到图片的总长度

 1 public class ImageAdapter extends BaseAdapter { 2  3         public int getCount() { 4             if (views != null) { 5                 return Integer.MAX_VALUE; 6             } else { 7                 return 0; 8             } 9         }10 11         public Object getItem(int position) {12             if (position >= len) {13                 position = position % len;14             }15 16             return position;17         }18 19         public long getItemId(int position) {20             if (position >= len) {21                 position = position % len;22             }23             return position;24         }25 26         public View getView(int position, View convertView, ViewGroup parent) {27             View view = convertView;28             if (position >= len) {29                 position = position % len;30             }31             if (view == null) {32                 view = views.get(position);33             }34 35             return view;36         }37     }

View Code

3.自动滑动，自定义gallery,重写onFling方法，触摸时，停止滑动，弹起时继续滑动

 1 public class MyGallery extends Gallery { 2  3     private List<ImageView> views; 4     /** 左边 */ 5     public static final int LEFT = 0; 6     /** 右边 */ 7     public static final int RIGHT = 1; 8  9     public MyGallery(Context context) {10         super(context);11         // TODO Auto-generated constructor stub12     }13 14     public MyGallery(Context context, AttributeSet attrs, int defStyle) {15         super(context, attrs, defStyle);16         // TODO Auto-generated constructor stub17     }18 19     public MyGallery(Context context, AttributeSet attrs) {20         super(context, attrs);21         // TODO Auto-generated constructor stub22     }23 24     /** 设置视图 */25     public void setViews(List<ImageView> views) {26         this.views = views;27     }28 29     @Override30     public boolean onTouchEvent(MotionEvent event) {31         // TODO Auto-generated method stub32         if (event.getAction() == MotionEvent.ACTION_UP) {33             // 遍历views 设置alpha34             if (views != null && !views.isEmpty()) {35                 for (ImageView iv : views) {36                     iv.setAlpha(255);37                 }38             }39             Context context = this.getContext();40             if (context != null && context instanceof MainActivity) {41                    MainActivity main=(MainActivity) context;42                    main.startSlide();43             }44         }45         return super.onTouchEvent(event);46     }47 48     /** 滑动 direction=1向右，-1向左 */49     public void slide(int direction) {50         // MotionEvent e1 = MotionEvent.obtain(SystemClock.uptimeMillis(),51         // SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN,52         // 89.333336f, 265.33334f, 0);53         // MotionEvent e2 = MotionEvent.obtain(SystemClock.uptimeMillis(),54         // SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, 300.0f,55         // 238.00003f, 0);56         if (direction == this.RIGHT)57             this.onFling(null, null, -1200, 0);58         else {59             this.onFling(null, null, 1200, 0);60         }61     }62 }

View Code

下面贴出完整代码：
布局xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@android:color/background_light"    tools:context=".MainActivity" >    <LinearLayout        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_centerInParent="true"        android:gravity="center"        android:orientation="vertical" >        <com.allen.gallery.MyGallery            android:id="@+id/mygallery"            android:layout_width="fill_parent"            android:layout_height="160dp"            android:fadingEdge="horizontal|vertical"            android:fadingEdgeLength="20dp" />        <LinearLayout            android:id="@+id/layout_dots"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginTop="10dp"            android:orientation="horizontal" >        </LinearLayout>    </LinearLayout></RelativeLayout>

2.完整的实现代码：

  1 package com.allen.gallery;  2   3 import java.util.ArrayList;  4 import java.util.List;  5   6 import android.app.Activity;  7 import android.os.Bundle;  8 import android.os.Handler;  9 import android.view.MotionEvent; 10 import android.view.View; 11 import android.view.View.OnTouchListener; 12 import android.view.ViewGroup; 13 import android.view.ViewGroup.LayoutParams; 14 import android.widget.AdapterView; 15 import android.widget.BaseAdapter; 16 import android.widget.Gallery; 17 import android.widget.ImageView; 18 import android.widget.LinearLayout; 19 import android.widget.TextView; 20  21 public class MainActivity extends Activity { 22     private List<ImageView> views = new ArrayList<ImageView>(); 23     /** 图片资源 */ 24     private int[] res = new int[] { R.drawable.image1, R.drawable.image2, 25             R.drawable.image3, R.drawable.image4 }; 26     private ImageView[] dots; 27     int len = 4; 28     int currentItem = 0;// 当前选中的viewPager的item 29     private Gallery gallery; 30     private LinearLayout layout_point; 31     /** 定时滑动 */ 32     private final Handler slideHandler = new Handler(); 33     /** 滑动 */ 34     private final Runnable slideRun = new Runnable() { 35  36         @Override 37         public void run() { 38             // TODO Auto-generated method stub 39             currentItem++; 40             currentItem = checkPosition(currentItem); 41             ((MyGallery) gallery).slide(MyGallery.RIGHT); 42             slideHandler.postDelayed(this, 2000); 43         } 44     }; 45  46     @Override 47     protected void onCreate(Bundle savedInstanceState) { 48         super.onCreate(savedInstanceState); 49         setContentView(R.layout.activity_main); 50         // 初始化中间 51         layout_point = (LinearLayout) this.findViewById(R.id.layout_dots); 52         gallery = (Gallery) findViewById(R.id.mygallery); 53         gallery.setSpacing(20); 54         init(); 55     } 56  57     public void init() { 58         dots = new ImageView[len]; 59         for (int j = 0; j < len; j++) { 60             // 添加图片 61             final ImageView iv = new ImageView(this); 62             iv.setImageResource(res[j]); 63             views.add(iv); 64             iv.setOnTouchListener(new OnTouchListener() { 65  66                 @Override 67                 public boolean onTouch(View v, MotionEvent event) { 68                     if (event.getAction() == MotionEvent.ACTION_DOWN) { 69                         iv.setAlpha(70); 70                         slideHandler.removeCallbacks(slideRun); 71                     } 72                     return false; 73                 } 74             }); 75             // 添加索引 76             ImageView imageView = new ImageView(this); 77             imageView.setLayoutParams(new LayoutParams(15, 15)); 78             dots[j] = imageView; 79             TextView tv = new TextView(this); 80             tv.setText("  "); 81             if (j == 0) { 82                 // 默认进入程序后第一张图片被选中; 83                 dots[j].setBackgroundResource(R.drawable.yst_i_pageon); 84             } else { 85                 dots[j].setBackgroundResource(R.drawable.yst_i_pageoff); 86             } 87  88             layout_point.addView(tv); 89             layout_point.addView(imageView); 90         } 91         gallery.setAdapter(new ImageAdapter()); 92         gallery.setSelection((Integer.MAX_VALUE / 2) - (Integer.MAX_VALUE / 2) 93                 % len); 94         gallery.setOnItemSelectedListener(selectListener); 95         ((MyGallery) gallery).setViews(views); 96         // TODO 定时滑动 97         startSlide(); 98     } 99 100     private AdapterView.OnItemSelectedListener selectListener = new AdapterView.OnItemSelectedListener() {101 102         @Override103         public void onItemSelected(AdapterView<?> parent, View view,104                 int position, long id) {105             // TODO Auto-generated method stub106             if (position >= len) {107                 position = position % len;108                 currentItem = position;109             }110             selectPage();111         }112 113         @Override114         public void onNothingSelected(AdapterView<?> parent) {115             // TODO Auto-generated method stub116         }117     };118 119     public class ImageAdapter extends BaseAdapter {120 121         public int getCount() {122             if (views != null) {123                 return Integer.MAX_VALUE;124             } else {125                 return 0;126             }127         }128 129         public Object getItem(int position) {130             if (position >= len) {131                 position = position % len;132             }133 134             return position;135         }136 137         public long getItemId(int position) {138             if (position >= len) {139                 position = position % len;140             }141             return position;142         }143 144         public View getView(int position, View convertView, ViewGroup parent) {145             View view = convertView;146             if (position >= len) {147                 position = position % len;148             }149             if (view == null) {150                 view = views.get(position);151             }152 153             return view;154         }155     }156 157     /** 开始滑动 */158     public void startSlide() {159         slideHandler.postDelayed(slideRun, 2000);160     }161 162     public int checkPosition(int position) {163         if (position >= len) {164             position = position % len;165         }166 167         return position;168     }169 170     /** 设置当前选中页 */171     private void selectPage() {172         /** 设置当前显示的页码 */173         for (int i = 0; i < len; i++) {174             dots[currentItem].setBackgroundResource(R.drawable.yst_i_pageon);175             if (currentItem != i) {176                 dots[i].setBackgroundResource(R.drawable.yst_i_pageoff);177             }178         }179     }180 }

点击我

下载就不用了吧。。。

android中无限循环滑动的gallery实例

android中无限循环滑动的gallery实例

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