Android 内存抖动性能分析 <10>

来源：互联网发布：淘宝网新店怎么推广编辑：程序博客网时间：2024/05/16 14:57

最近刚好做图形处理方面,对图片像素进行处理,可想而知,一张图片如800*800的,那么像素点就有640000个,如果对这么大的一个数据进行运算操作,将会消耗大量内存空间,下面是自己在处理一张图片,让这张图片调整成一张老照片效果,具体操作如下:

<1> : 新建Android工程如下:

<2> : 工程里面还有其他的代码,这里只给出主要涉及的:

DurianMainActivity.java

package org.durian.duriangaussian;import android.app.Activity;import android.graphics.BitmapFactory;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.widget.ImageView;public class DurianMainActivity extends Activity {    private ImageView imageView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.durian_main);        imageView=(ImageView)findViewById(R.id.image);        imageView.setImageBitmap(BitmapFactory.decodeResource(this.getResources(),R.drawable.ghh));    }}

DurianGaussView.java

package org.durian.duriangaussian;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Color;import android.os.AsyncTask;import android.os.Handler;import android.os.Message;import android.util.AttributeSet;import android.util.Log;import android.view.View;/** * Created by Administrator on 2016/1/8. */public class DurianGaussView extends View {    private final static String TAG = "DurianGaussView";    private Bitmap mBitmap;    private Bitmap mOldPhotoMap;    private int mBitmapWidth;    private int mBitmapHeight;    private int mArrayColorLength;    private int mArrayColor[] = null;    private int mInColors[] = null;    private int mOutColors[] = null;    private int count = 0;    private Context mContext;    public DurianGaussView(Context context, AttributeSet attrs) {        super(context, attrs);        initView(context);    }    private void initView(Context context) {        mContext=context;        mBitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.ghh);        mBrightnessBitmap.execute();        mOldPhotoMap= BitmapFactory.decodeResource(context.getResources(), R.drawable.ghh);        mOldPhotoEffort.execute();    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        int index=0;//        canvas.drawBitmap(mBitmap,25.0f,25.0f,null);        canvas.drawBitmap(mOldPhotoMap,500f,25.0f,null);        /*for (int i = 0; i < 100; i++) {            int x = i - 50;            double y = Gauss.gaussFormula(x / 10);        }*/    }    private Handler mHandler=new Handler(){        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            Log.i(TAG,"message what : " +msg.what);            invalidate();        }    };    private OldPhotoEffort mOldPhotoEffort=new OldPhotoEffort();    private class OldPhotoEffort extends AsyncTask<String,Integer,String>{        @Override        protected String doInBackground(String... params) {            Log.i(TAG,"OldPhotoEffort : ...");            mOldPhotoMap=DurianOldPhotoEffort.makeOldPhotoEffort(mContext);            mHandler.sendEmptyMessage(100);            return null;        }        @Override        protected void onPreExecute() {            super.onPreExecute();        }        @Override        protected void onPostExecute(String s) {            super.onPostExecute(s);        }        @Override        protected void onProgressUpdate(Integer... values) {            super.onProgressUpdate(values);        }    }    private BrightnessBitmap mBrightnessBitmap=new BrightnessBitmap();    private class BrightnessBitmap extends AsyncTask<String,Integer,String>{        @Override        protected String doInBackground(String... params) {//            mBitmap=DurianBrightness.decodeBitmap(mContext);            mHandler.sendEmptyMessage(0);            return null;        }        @Override        protected void onPreExecute() {            super.onPreExecute();        }        @Override        protected void onPostExecute(String s) {            super.onPostExecute(s);        }        @Override        protected void onProgressUpdate(Integer... values) {            super.onProgressUpdate(values);        }    }}

上面有两个工作线程,这里屏蔽其中一个功能.

DurianOldPhotoEffort.java

package org.durian.duriangaussian;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.util.Log;/** * Created by Administrator on 2016/1/13. */public class DurianOldPhotoEffort {    private final static String TAG="DurianOldPhotoEffort";    public static Bitmap makeOldPhotoEffort(Context context){        Bitmap bitmap= BitmapFactory.decodeResource(context.getResources(),R.drawable.ghh);        int bitmapWidth=bitmap.getWidth();        int bitmapHeight=bitmap.getHeight();        int pixLength=bitmapHeight*bitmapWidth;        int inPixs[]=new int[pixLength];        int outPixs[]=new int[pixLength];        int tr=0,tg=0,tb=0,ta=0;        int index=0;        int color=0;        Log.i(TAG, "123**********************");        for (int row=0;row<bitmapHeight;row++){            for (int col=0;col<bitmapWidth;col++){                index=row*bitmapWidth+col;                color=bitmap.getPixel(col,row);                inPixs[index]=color;            }        }        Log.i(TAG, "456**********************");        int fr=0,fg=0,fb=0;        int rows=0,cols=0;        for (rows=0;rows<bitmapHeight;rows++){            tr=0;tg=0;tb=0;ta=0;            for (cols=0;cols<bitmapWidth;cols++){                index=rows*bitmapWidth+cols;                ta=(inPixs[index]>>24) & 0xFF;                tr=(inPixs[index]>>16) & 0xFF;                tg=(inPixs[index]>>8) & 0xFF;                tb=(inPixs[index]) & 0xFF;                //                /*int fr=(int)colorBlend(noise(),(tr*0.393)+(tg*0.769)+(tb*0.189),tr);                int fg=(int)colorBlend(noise(),(tr*0.349)+(tg*0.686)+(tb*0.168),tg);                int fb=(int)colorBlend(noise(),(tr*0.272)+(tg*0.534)+(tb*0.131),tb);*/                fr=(int)colorBlend(noise(),(tr*0.393)+(tg*0.769)+(tb*0.189),tr);                fg=(int)colorBlend(noise(),(tr*0.349)+(tg*0.686)+(tb*0.168),tg);                fb=(int)colorBlend(noise(),(tr*0.272)+(tg*0.534)+(tb*0.131),tb);                outPixs[index]=(ta<<24) | (clamp(fr)<<16) | (clamp(fg)<<8) | clamp(fb);                bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);                bitmap.setPixel(cols,rows,outPixs[index]);            }        }        Log.i(TAG, "789**********************");        return bitmap;    };    private static double noise(){        return Math.random()*0.5+0.5;    }    private static double colorBlend(double scale,double dest,double src){        return (scale*dest+(1.0-scale)*src);    }    private static int clamp(int c){        return c>255?255:((c<0)?0:c);    }    public String toString(){        return "Effect from Photoshop App !";    }}

布局文件:

<LinearLayout 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:orientation="vertical">    <ImageView        android:id="@+id/image"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <org.durian.duriangaussian.DurianGaussView        android:id="@+id/durianview"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

里面用到的图片:

<3> : 运行的结果,图片将不会被处理,控制台一直报:

01-14 00:45:27.745  15021-15036/org.durian.duriangaussian I/art﹕ Background partial concurrent mark sweep GC freed 30(1200B) AllocSpace objects, 11(24MB) LOS objects, 33% free, 32MB/48MB, paused 6.652ms total 35.034ms

<4> : 内存图:

右上角的Free和Allocated 旁边内存量大小将不断的变化,从上面的图形来看,内存抖动的非常厉害.

<5> : 解决上面的内存抖动,首先想到的是可能是下面导致的:

//用注释部分的,将会导致内存疯狂抖动                /*int fr=(int)colorBlend(noise(),(tr*0.393)+(tg*0.769)+(tb*0.189),tr);                int fg=(int)colorBlend(noise(),(tr*0.349)+(tg*0.686)+(tb*0.168),tg);                int fb=(int)colorBlend(noise(),(tr*0.272)+(tg*0.534)+(tb*0.131),tb);*/                //但是由于下面运算量,还是会疯狂抖动                fr=(int)colorBlend(noise(),(tr*0.393)+(tg*0.769)+(tb*0.189),tr);                fg=(int)colorBlend(noise(),(tr*0.349)+(tg*0.686)+(tb*0.168),tg);                fb=(int)colorBlend(noise(),(tr*0.272)+(tg*0.534)+(tb*0.131),tb);

所以把这里和相关的代码全部用到fr,fg等地方全部屏蔽掉,但是再次运行的时候发现还是不行.

继续查找:

bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);                bitmap.setPixel(cols,rows,outPixs[index]);

发现这段代码的确有问题,bitmap反复copy,我靠,有点低级错误呀.看来需要把这一句代码放在for循环外面:

bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);

调整为:

Log.i(TAG, "456**********************");        int fr=0,fg=0,fb=0;        int rows=0,cols=0;        bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);        for (rows=0;rows<bitmapHeight;rows++){            tr=0;tg=0;tb=0;ta=0;            for (cols=0;cols<bitmapWidth;cols++){                index=rows*bitmapWidth+cols;                ta=(inPixs[index]>>24) & 0xFF;                tr=(inPixs[index]>>16) & 0xFF;                tg=(inPixs[index]>>8) & 0xFF;                tb=(inPixs[index]) & 0xFF;                fr=(int)colorBlend(noise(),(tr*0.393)+(tg*0.769)+(tb*0.189),tr);                fg=(int)colorBlend(noise(),(tr*0.349)+(tg*0.686)+(tb*0.168),tg);                fb=(int)colorBlend(noise(),(tr*0.272)+(tg*0.534)+(tb*0.131),tb);                outPixs[index]=(ta<<24) | (clamp(fr)<<16) | (clamp(fg)<<8) | clamp(fb);                bitmap.setPixel(cols,rows,outPixs[index]);            }        }        Log.i(TAG, "789**********************");

然后再重新运行:

好了问题就解决了,一行代码之差.

整个app运行效果:

左上角是没有调整的原图,下面是经过处理过的,照片发黄的效果了.

1 0

Android 内存抖动 性能分析 <10>

Android 内存抖动性能分析 <10>