首页 / 移动开发 / Android / Android相册效果（使用C#和Java分别实现）

using Android.App;using Android.OS;using Android.Widget;namespace ImageDemo{[Activity（Label = "@string/ApplicationName", MainLauncher = true, Icon = "@drawable/icon"）]public class MainActivity : Activity{private Gallery _gallery;private ImageView _selectedImg;private readonly int[] _imageIds = {Resource.Drawable.test1,Resource.Drawable.test2,Resource.Drawable.test3,Resource.Drawable.test4,Resource.Drawable.test5,Resource.Drawable.test6,Resource.Drawable.test7,Resource.Drawable.test8};protected override void OnCreate（Bundle bundle）{base.OnCreate（bundle）;SetContentView（Resource.Layout.Main）;_gallery = FindViewById<Gallery>（Resource.Id.gallery）;_selectedImg = FindViewById<ImageView>（Resource.Id.currentImg）;_gallery.Adapter = new ImageAdapter（this, _imageIds）;_gallery.ItemSelected += Gallery_ItemSelected;}private void Gallery_ItemSelected（object sender, AdapterView.ItemSelectedEventArgs e）{_selectedImg.SetImageResource（_imageIds[e.Position]）;}}public class ImageAdapter : BaseAdapter{private readonly Context _context;private readonly int[] _imageIds;public ImageAdapter（Context context,int[]imageIds）{_context = context;_imageIds = imageIds;}public override Object GetItem（int position）{return null;}public override long GetItemId（int position）{return 0;}public override int Count{get { return _imageIds.Length; }}public override View GetView（int position, View convertView, ViewGroup parent）{var image = new ImageView（_context）;image.SetImageResource（_imageIds[position]）;image.LayoutParameters = new Gallery.LayoutParams（150, 100）;image.SetScaleType（ImageView.ScaleType.FitXy）;return image;}}}

package com.example.halower.gallerydemo;import android.content.Context;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageView;import static android.widget.Gallery.LayoutParams;public class MainActivity extends ActionBarActivity {private int[] imageIds = {R.drawable.test1,R.drawable.test2,R.drawable.test3,R.drawable.test4,R.drawable.test5,R.drawable.test6,R.drawable.test7,R.drawable.test8};Gallery gallery;ImageView currentView;@Overrideprotected void onCreate（Bundle savedInstanceState） {super.onCreate（savedInstanceState）;setContentView（R.layout.activity_main）;gallery=（Gallery） findViewById（R.id.gallery）;ImageAdapter adapter=new ImageAdapter（this,imageIds）;currentView = （ImageView）findViewById（R.id.currentImg）;gallery.setAdapter（adapter）;gallery.setOnItemSelectedListener（new AdapterView.OnItemSelectedListener（）{@Overridepublic void onItemSelected（AdapterView<?> parent, View view, int position,long id） {currentView.setImageResource（imageIds[position]）;}@Overridepublic void onNothingSelected（AdapterView<?> parent） {}}）;}}class ImageAdapter extends BaseAdapter{Context _context;int[] imageIds;public ImageAdapter（Context context,int[] imageIds）{_context=context;this.imageIds=imageIds;}@Overridepublic int getCount（） {return imageIds.length;}@Overridepublic Object getItem（int position） {return null;}@Overridepublic long getItemId（int position） {return 0;}@Overridepublic View getView（int position, View convertView, ViewGroup parent） {ImageView imageView=new ImageView（_context）;imageView.setImageResource（imageIds[position]）;imageView.setScaleType（ImageView.ScaleType.FIT_XY）;imageView.setLayoutParams（new LayoutParams（70,100））;return imageView;}}

<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:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"><ImageViewandroid:layout_width="320dp"android:layout_height="320dp"android:id="@+id/currentImg"android:layout_centerHorizontal="true" /><Galleryandroid:layout_width="match_parent"android:layout_height="wrap_content"android:unselectedAlpha="0.6"android:spacing="2pt"android:layout_below="@+id/currentImg"android:id="@+id/gallery" /></RelativeLayout>