ImageSwitcher的使用(一):与Gallery配合使用

package com.example.androidtest;import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.content.res.TypedArray;import android.view.View;import android.view.ViewGroup;import android.view.ViewGroup.LayoutParams;import android.view.animation.AnimationUtils;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageSwitcher;import android.widget.ImageView;import android.widget.ViewSwitcher.ViewFactory;import android.util.Log;public class MainActivity extends Activity implements ViewFactory {Integer[] imageIDs = {R.drawable.ic_launcher, R.drawable.ic_launcher};private ImageSwitcher imageSwitcher;public void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);imageSwitcher = (ImageSwitcher)findViewById(R.id.switcher1);imageSwitcher.setFactory(this);imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left));imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right));Gallery gallery = (Gallery)findViewById(R.id.gallery1);gallery.setAdapter(new ImageAdapter(this));gallery.setOnItemClickListener(new OnItemClickListener() {public void onItemClick(AdapterView<?> parent, View v, int position, long id){imageSwitcher.setImageResource(imageIDs[position]);Log.d("wuli", "position:" + position + " id:" + id);}});}public View makeView(){ImageView imageView = new ImageView(this);imageView.setBackgroundColor(0xff000000);imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);imageView.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));return imageView;}public class ImageAdapter extends BaseAdapter{private Context context;private int itemBackground;public ImageAdapter(Context c){context = c;TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);itemBackground = a.getResourceId(R.styleable.Gallery1_android_galleryItemBackground, 0);a.recycle();}public int getCount(){return imageIDs.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 imageView = new ImageView(context);Log.d("wuli", "position:" + position);imageView.setImageResource(imageIDs[position]);imageView.setScaleType(ImageView.ScaleType.FIT_XY);imageView.setLayoutParams(new Gallery.LayoutParams(150, 120));imageView.setBackgroundResource(itemBackground);return imageView;}}}

在res\values下新建styleable.xml:

<?xml version="1.0" encoding="UTF-8"?><resources>     <declare-styleable name="Gallery1">         <attr name="android:galleryItemBackground" />     </declare-styleable> </resources>

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:background="#ff000000" >  <ImageSwitcher     android:id="@+id/switcher1"     android:layout_width="fill_parent"     android:layout_height="fill_parent"                     android:layout_alignParentLeft="true"     android:layout_alignParentRight="true"     android:layout_alignParentBottom="true" />  <Gallery    android:id="@+id/gallery1"    android:layout_width="fill_parent"     android:layout_height="wrap_content" />    </RelativeLayout>