使用ImageSwitcher和Gallery实现图片的浏览

一.

mainactivity

package com.example.ui6;import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.view.Menu;import android.view.View;import android.view.ViewGroup;import android.view.ViewGroup.LayoutParams;import android.view.Window;import android.view.animation.AnimationUtils;import android.widget.AdapterView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageSwitcher;import android.widget.ImageView;import android.widget.ViewSwitcher.ViewFactory;public class MainActivity extends Activity implements OnItemSelectedListener,ViewFactory {private ImageSwitcher is;private Gallery gallery;private Integer[] mThumbIds = { R.drawable.a, R.drawable.b,R.drawable.c, R.drawable.d, R.drawable.e, };private Integer[] mImageIds = { R.drawable.a, R.drawable.b,R.drawable.c, R.drawable.d, R.drawable.e, };@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.activity_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);}@Overridepublic 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.f);return i;}private Context mContext;}@Overridepublic void onItemSelected(AdapterView parent, View view, int position,long id) {is.setImageResource(mImageIds[position]);}@Overridepublic void onNothingSelected(AdapterView parent) {}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}

二.

activity_main.java:

<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" >    <ImageSwitcher        android:id="@+id/switcher"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true" />    <Gallery        android:id="@+id/gallery"        android:layout_width="match_parent"        android:layout_height="60dp"        android:layout_alignParentBottom="true"        android:layout_alignParentLeft="true"        android:background="#55000000"        android:gravity="center_vertical"        android:spacing="16dp" /></RelativeLayout>