可循环显示图像的Android Gallery组件

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在main.xml文件中定义的Gallery和ImageSwitcher组件的代码如下：

代码

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

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

android:orientation="vertical" android:layout_width="fill_parent"

android:layout_height="fill_parent">

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

android:layout_height="wrap_content" android:layout_marginTop="30dp" />

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

android:layout_width="fill_parent" android:layout_height="wrap_content"

android:layout_marginTop="30dp" />

< /LinearLayout>

本例中Main类的完整代码如下：

代码

package net.blogjava.mobile;

import android.app.Activity;

import android.content.Context;

import android.content.res.TypedArray;

import android.os.Bundle;

import android.view.View;

import android.view.ViewGroup;

import android.view.animation.AnimationUtils;

import android.widget.AdapterView;

import android.widget.BaseAdapter;

import android.widget.Gallery;

import android.widget.ImageSwitcher;

import android.widget.ImageView;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.Gallery.LayoutParams;

import android.widget.ViewSwitcher.ViewFactory;

public class Main extends Activity implements OnItemSelectedListener,

ViewFactory

{

private Gallery gallery;

private ImageSwitcher imageSwitcher;

private ImageAdapter imageAdapter;

private int[] resIds = new int[]

{ R.drawable.item1, R.drawable.item2, R.drawable.item3,