3DGallery

工程源码：http://www.drovik.com/android/demo/3DGalleryDemo.rar import android.app.Activity;

import android.content.Context;

003	import android.content.res.TypedArray;

004	import android.graphics.Bitmap;

005	import android.graphics.Bitmap.Config;

006	import android.graphics.BitmapFactory;

007	import android.graphics.Canvas;

008	import android.graphics.LinearGradient;

009	import android.graphics.Matrix;

010	import android.graphics.Paint;

011	import android.graphics.PorterDuff.Mode;

012	import android.graphics.PorterDuffXfermode;

013	import android.graphics.Shader.TileMode;

014	import android.graphics.drawable.BitmapDrawable;

015	import android.os.Bundle;

016	import android.view.Menu;

017	import android.view.View;

018	import android.view.ViewGroup;

019	import android.widget.AdapterView;

020	import android.widget.AdapterView.OnItemSelectedListener;

021	import android.widget.BaseAdapter;

022	import android.widget.ImageView;

023

024	public class MainActivity extends Activity implementsOnItemSelectedListener{

025

026	private CustomGallery gallery;

027	private ImageAdapter imageAdapter;

028

029	private int[] resIds = new int[] { R.drawable.item1, R.drawable.item2,

030	R.drawable.item3, R.drawable.item4, R.drawable.item5,

031	R.drawable.item6, R.drawable.item7, R.drawable.item8,

032	R.drawable.item9, R.drawable.item10, R.drawable.item11,

033	R.drawable.item12, R.drawable.item13, R.drawable.item14,

034	R.drawable.item15 };

035

036

@Override

037	public void onCreate(Bundle savedInstanceState) {

038	super.onCreate(savedInstanceState);

039	setContentView(R.layout.main);

040	gallery = (CustomGallery) findViewById(R.id.gallery);

041	gallery.setSelection(2, true);

042	gallery.setAnimationDuration(1000);

043	imageAdapter = new ImageAdapter(this);

044	gallery.setAdapter(imageAdapter);

045	gallery.setOnItemSelectedListener(this);

046

}

047

048

@Override

049	public boolean onCreateOptionsMenu(Menu menu) {

050	getMenuInflater().inflate(R.menu.main, menu);

051	return true;

052

}

053

054

@Override

055	public void onItemSelected(AdapterView<?> parent, View view, intposition,

056	long id) {

057	// 选中Gallery中某个图像时，在ImageSwitcher组件中放大显示该图像

058

059

}

060

061

@Override

062	public void onNothingSelected(AdapterView<?> parent) {

063

}

064

065	public class ImageAdapter extends BaseAdapter {

066

067	int mGalleryItemBackground;

068

069	private Context mContext;

070

071	public ImageAdapter(Context context) {

072	mContext = context;

073	TypedArray typedArray = obtainStyledAttributes(R.styleable.Gallery);

074	mGalleryItemBackground = typedArray.getResourceId(

075	R.styleable.Gallery_android_galleryItemBackground,0);

076	typedArray.recycle();

077

}

078

079	// 第1点改进，返回一个很大的值，例如，Integer.MAX_VALUE

080	public int getCount() {

081	return Integer.MAX_VALUE;

082

}

083

084	public Object getItem(int position) {

085	return position;

086

}

087

088	public long getItemId(int position) {

089	return position;

090

}

091

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

093	ImageView i = createReflectedImages(mContext, resIds[position%resIds.length]);

094	i.setLayoutParams(new CustomGallery.LayoutParams(120,100));

095	i.setScaleType(ImageView.ScaleType.CENTER_INSIDE);

096	// 设置的抗锯齿,防止图像在旋转的时候出现锯齿

097	BitmapDrawable drawable = (BitmapDrawable) i.getDrawable();

098	drawable.setAntiAlias(true);

099

return i;

100

}

101

}

102

103

/**

104

* 为图片添加倒影

105	* @param mContext

106	* @param imageId

107

* @return

108

*/

109	public ImageView createReflectedImages(Context mContext, intimageId) {

110	Bitmap originalImage = BitmapFactory.decodeResource(

111	mContext.getResources(), imageId);

112	final int reflectionGap = 4;

113	int width = originalImage.getWidth();

114	int height = originalImage.getHeight();

115

116	Matrix matrix = new Matrix();

117	matrix.preScale(1, -1);

118

Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,

120	height / 2, width, height / 2, matrix, false);

121

122	Bitmap bitmapWithReflection = Bitmap.createBitmap(width,

123	(height + height / 2), Config.ARGB_8888);

124

125	Canvas canvas = new Canvas(bitmapWithReflection);

126	canvas.drawBitmap(originalImage, 0, 0, null);

127

128	Paint deafaultPaint = new Paint();

129	canvas.drawRect(0, height, width, height + reflectionGap, deafaultPaint);

130	canvas.drawBitmap(reflectionImage, 0, height + reflectionGap,null);

131

132	Paint paint = new Paint();

133	LinearGradient shader = new LinearGradient(0,

134	originalImage.getHeight(), 0, bitmapWithReflection.getHeight()

135	+ reflectionGap, 0x70ffffff, 0x00ffffff,

136	TileMode.MIRROR);

137

138	paint.setShader(shader);

139	paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));

140	canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()

141	+ reflectionGap, paint);

142

143	ImageView imageView = new ImageView(mContext);

144	imageView.setImageBitmap(bitmapWithReflection);

145

146	return imageView;

147

}

148

149

}