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watak


ImageSwitcher  

翻译人:wallace2010

译者博客:http://blog.csdn.net/springiscoming2008

版本:Android 2.2 r1

 

public class ImageSwitcher extends ViewSwitcher

 

java.lang.Object

android.view.View

                android.view.ViewGroup

                       android.widget.FrameLayout

                              android.widget.ViewAnimator

                                     android.widget.ViewSwitcher

                                            android.widget.ImageSwitcher

 

类概述

        

(译者注:ImageSwitcherAndroid中控制图片展示效果的一个控件,如:幻灯片效果...,颇有感觉啊,做相册一绝。)

 

公共方法

         public void setImageDrawable (Drawable drawable)

         绘制图片

 

public void setImageResource (int resid)

设置图片资源库

 

public void setImageURI (Uri uri)

设置图片地址

        

补充

         文章链接

                   Android ImageSwitcher

                   Image Switcher View | Android Developer Tutorial

         示例代码(本文代码转载自这里

                   java文件

public class mainactivity extends Activity implements

  OnItemSelectedListener, ViewFactory {

 private ImageSwitcher is;

 private Gallery gallery;

 

 private Integer[] mThumbIds = { R.drawable.b, R.drawable.c,

   R.drawable.d, R.drawable.f, R.drawable.g,

   };

 

 private Integer[] mImageIds = { R.drawable.b, R.drawable.c,

   R.drawable.d, R.drawable.f, R.drawable.g, };

 

@Override

 protected void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  requestWindowFeature(Window.FEATURE_NO_TITLE);

  setContentView(R.layout.main);

 

  is = (ImageSwitcher) findViewById(R.id.switcher);

  is.setFactory(this);

 

  is.setInAnimation(AnimationUtils.loadAnimation(this,

    android.R.anim.fade_in));

  is.setOutAnimation(AnimationUtils.loadAnimation(this,

    android.R.anim.fade_out));

 

  gallery = (Gallery) findViewById(R.id.gallery);

 

  gallery.setAdapter(new ImageAdapter(this));

  gallery.setOnItemSelectedListener(this);

 }

 

 @Override

 public View makeView() {

  ImageView i = new ImageView(this);

  i.setBackgroundColor(0xFF000000);

  i.setScaleType(ImageView.ScaleType.FIT_CENTER);

  i.setLayoutParams(new ImageSwitcher.LayoutParams(

    LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

  return i;

 }

 

 public class ImageAdapter extends BaseAdapter {

  public ImageAdapter(Context c) {

   mContext = c;

  }

 

  public int getCount() {

   return mThumbIds.length;

  }

 

  public Object getItem(int position) {

   return position;

  }

 

  public long getItemId(int position) {

   return position;

  }

 

  public View getView(int position, View convertView, ViewGroup parent) {

   ImageView i = new ImageView(mContext);

 

   i.setImageResource(mThumbIds[position]);

   i.setAdjustViewBounds(true);

   i.setLayoutParams(new Gallery.LayoutParams(

     LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

   i.setBackgroundResource(R.drawable.e);

   return i;

  }

 

  private Context mContext;

 

 }

 

 @Override

 public void onItemSelected(AdapterView<?> parent, View view, int position,

   long id) {

  is.setImageResource(mImageIds[position]);

 

 }

 

 @Override

 public void onNothingSelected(AdapterView<?> parent) {

 }

}

                   xml文件

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

   

    <ImageSwitcher android:id="@+id/switcher"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_alignParentTop="true"

        android:layout_alignParentLeft="true"

    />

   

    <Gallery android:id="@+id/gallery"

        android:background="#55000000"

        android:layout_width="match_parent"

        android:layout_height="60dp"

        android:layout_alignParentBottom="true"

        android:layout_alignParentLeft="true"

       

        android:gravity="center_vertical"

        android:spacing="16dp"

    />

</RelativeLayout>


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