android图片特效，图片过滤

本实例是使用原图片进行简单的过滤处理成自己想要的效果，过滤图片的处理类使用的是daizhj提供的，github上面有下载：

源码下载：
https://github.com/daizhenjun/ImageFilterCC++forios
https://github.com/daizhenjun/ImageFilterForWindowsPhoneWindowsPhone7
https://github.com/daizhenjun/ImageFilterForAndroidAndroid2.1版本及以上
原文链接:http://www.cnblogs.com/daizhj/archive/2012/06/21/2557550.html

下面的效果是基于以上作者提供的处理包做优化和实现的。

效果如下：

1.首先实选择列表从最左边开始排序并且默认选中第一项，这里为了实现从最左边开始所以使用HorizontalScrollView结合GridView实现Galleryview图片效果图，代码如下：

<?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 view 图片效果图 -->   <HorizontalScrollView    android:id="@+id/galleryScroll"android:layout_width="fill_parent"android:layout_height="90dip"android:scrollbars="none"android:focusable="false"android:layout_alignParentBottom="true"android:background="@drawable/camera_filter_review_bg"><FrameLayout android:layout_width="fill_parent"android:layout_height="fill_parent"android:focusable="false"android:layout_gravity="center_vertical"><LinearLayout android:layout_width="770dp"android:layout_height="wrap_content" android:orientation="horizontal"android:focusable="false"android:gravity="center"android:layout_gravity="center"><GridView android:id="@+id/gallery" android:layout_width="fill_parent"android:gravity="center" android:layout_height="wrap_content"android:horizontalSpacing="1.0dip" android:verticalSpacing="1.0dip"android:stretchMode="spacingWidthUniform" android:numColumns="auto_fit"android:columnWidth="70dip"android:focusable="false"android:cacheColorHint="#00000000"android:listSelector="#00000000"android:layout_gravity="center"></GridView></LinearLayout></FrameLayout></HorizontalScrollView></LinearLayout>

2.下面把主界面代码贴出来，主要是加载数据，以及异步渲染图片操作。

import java.util.ArrayList;import java.util.List;import HaoRan.ImageFilter.AutoAdjustFilter;import HaoRan.ImageFilter.ColorQuantizeFilter;import HaoRan.ImageFilter.FeatherFilter;import HaoRan.ImageFilter.IImageFilter;import HaoRan.ImageFilter.Image;import HaoRan.ImageFilter.OldPhotoFilter;import HaoRan.ImageFilter.R;import HaoRan.ImageFilter.RainBowFilter;import HaoRan.ImageFilter.SepiaFilter;import HaoRan.ImageFilter.VignetteFilter;import HaoRan.ImageFilter.VintageFilter;import HaoRan.ImageFilter.WaterWaveFilter;import HaoRan.ImageFilter.XRadiationFilter;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.AsyncTask;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.GridView;import android.widget.ImageView;import android.widget.ProgressBar;public class ImageFilterMain extends Activity {private ImageView imageView;private ProgressBar mProgressBar;private List<FilterInfo> filterArray = new ArrayList<FilterInfo>();@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);imageView= (ImageView) findViewById(R.id.cropimage_filter_show_iv);mProgressBar = (ProgressBar) findViewById(R.id.progress_large);//注：在android系统上，手机图片尺寸尽量控制在480*480范围内,否则在高斯运算时可以造成内存溢出的问题Bitmap bitmap = BitmapFactory.decodeResource(ImageFilterMain.this.getResources(), R.drawable.image);imageView.setImageBitmap(bitmap);loadData();LoadImageFilter();}private void LoadImageFilter() {GridView gallery = (GridView) findViewById(R.id.gallery);final ImageAdapter filterAdapter = new ImageAdapter(ImageFilterMain.this,filterArray);gallery.setAdapter(filterAdapter);gallery.setNumColumns(11);gallery.setOnItemClickListener(new AdapterView.OnItemClickListener() {public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {filterAdapter.changeStatus(position);filterAdapter.notifyDataSetChanged();IImageFilter filter = (IImageFilter) filterAdapter.getItem(position);//开始渲染new processImageTask(ImageFilterMain.this, filter).execute();}});}/** * 加载图片filter */private void loadData(){    filterArray.add(new FilterInfo(R.drawable.saturationmodity_filter,null/* 此处会生成原图效果 */,true));filterArray.add(new FilterInfo(R.drawable.vignette_filter,new VignetteFilter(),false));filterArray.add(new FilterInfo(R.drawable.autoadjust_filter,new AutoAdjustFilter(),false));filterArray.add(new FilterInfo(R.drawable.colorquantize_filter,new ColorQuantizeFilter(),false));filterArray.add(new FilterInfo(R.drawable.waterwave_filter,new WaterWaveFilter(),false));filterArray.add(new FilterInfo(R.drawable.vintage_filter,new VintageFilter(),false));filterArray.add(new FilterInfo(R.drawable.oldphoto_filter,new OldPhotoFilter(),false));filterArray.add(new FilterInfo(R.drawable.sepia_filter,new SepiaFilter(),false));filterArray.add(new FilterInfo(R.drawable.rainbow_filter,new RainBowFilter(),false));filterArray.add(new FilterInfo(R.drawable.feather_filter,new FeatherFilter(),false));filterArray.add(new FilterInfo(R.drawable.xradiation_filter,new XRadiationFilter(),false));}//渲染，过滤图片异步任务public class processImageTask extends AsyncTask<Void, Void, Bitmap> {private IImageFilter filter;        private Activity activity = null;public processImageTask(Activity activity, IImageFilter imageFilter) {this.filter = imageFilter;this.activity = activity;}@Overrideprotected void onPreExecute() {// TODO Auto-generated method stubsuper.onPreExecute();mProgressBar.setVisibility(View.VISIBLE);}public Bitmap doInBackground(Void... params) {Image img = null;try    {Bitmap bitmap = BitmapFactory.decodeResource(activity.getResources(), R.drawable.image);img = new Image(bitmap);if (filter != null) {img = filter.process(img);img.copyPixelsFromBuffer();}return img.getImage();    }catch(Exception e){if (img != null && img.destImage.isRecycled()) {img.destImage.recycle();img.destImage = null;System.gc(); // 提醒系统及时回收}}finally{if (img != null && img.image.isRecycled()) {img.image.recycle();img.image = null;System.gc(); // 提醒系统及时回收}}return null;}@Overrideprotected void onPostExecute(Bitmap result) {if(result != null){super.onPostExecute(result);imageView.setImageBitmap(result);}mProgressBar.setVisibility(View.GONE);}}}

3.最好把代码附上，有需要的可以自己下载慢慢研究

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