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/ImageFilterC  C++ for ios
  https://github.com/daizhenjun/ImageFilterForWindowsPhone  Windows Phone7
  https://github.com/daizhenjun/ImageFilterForAndroid  Android 2.1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Gallery view 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>();

	@Override
	public 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;
		}

		@Override
		protected void onPreExecute() {
			// TODO Auto-generated method stub
			super.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;
		}
		
		@Override
		protected 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