android拍照压缩及添加水印3



1.调用拍照(获取原始图片)

[java] view plaincopyprint?

1. Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  
2. String ppName = "example_2012.jpg";  
3. File f1 = new File("/sdcard/mfile/image/" + ppName);  
4. Uri u1 = Uri.fromFile(f1);  
5. intent.putExtra(MediaStore.EXTRA_OUTPUT, u1);  
6. startActivityForResult(intent, CAMERA_ACTIVITY);  

                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);                String ppName = "example_2012.jpg";                File f1 = new File("/sdcard/mfile/image/" + ppName);                Uri u1 = Uri.fromFile(f1);                intent.putExtra(MediaStore.EXTRA_OUTPUT, u1);                startActivityForResult(intent, CAMERA_ACTIVITY);

2.获取本地图片进行处理并回写

[java] view plaincopyprint?

1. private void dealPhotoFile(final String file)  
2. {  
3.     PhotoTask task = new PhotoTask(file);  
4.     task.start();  
5.       
6.     photoTasks.add(task);  
7. }  

    private void dealPhotoFile(final String file)    {        PhotoTask task = new PhotoTask(file);        task.start();                photoTasks.add(task);    }

[java] view plaincopyprint?

1. private class PhotoTask extends Thread  
2. {  
3.     private String file;  
4.       
5.     private boolean isFinished;  
6.       
7.     public PhotoTask(String file)  
8.     {  
9.         this.file = file;  
10.     }  
11.       
12.     @Override  
13.     public void run()  
14.     {  
15.         BufferedOutputStream bos = null;  
16.         Bitmap icon = null;  
17.         try  
18.         {  
19.             BitmapFactory.Options options = new BitmapFactory.Options();  
20.             options.inJustDecodeBounds = true;  
21.             BitmapFactory.decodeFile(file, options); //此时返回bm为空  
22.             float percent =  
23.                 options.outHeight > options.outWidth ? options.outHeight / 960f : options.outWidth / 960f;  
24.               
25.             if (percent < 1)  
26.             {  
27.                 percent = 1;  
28.             }  
29.             int width = (int)(options.outWidth / percent);  
30.             int height = (int)(options.outHeight / percent);  
31.             icon = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);  
32.               
33.             //初始化画布 绘制的图像到icon上    
34.             Canvas canvas = new Canvas(icon);  
35.             //建立画笔    
36.             Paint photoPaint = new Paint();  
37.             //获取跟清晰的图像采样    
38.             photoPaint.setDither(true);  
39.             //过滤一些    
40.             //                    photoPaint.setFilterBitmap(true);  
41.             options.inJustDecodeBounds = false;  
42.               
43.             Bitmap prePhoto = BitmapFactory.decodeFile(file);  
44.             if (percent > 1)  
45.             {  
46.                 prePhoto = Bitmap.createScaledBitmap(prePhoto, width, height, true);  
47.             }  
48.               
49.             canvas.drawBitmap(prePhoto, 0, 0, photoPaint);  
50.               
51.             if (prePhoto != null && !prePhoto.isRecycled())  
52.             {  
53.                 prePhoto.recycle();  
54.                 prePhoto = null;  
55.                 System.gc();  
56.             }  
57.               
58.             //设置画笔    
59.             Paint textPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);  
60.             //字体大小    
61.             textPaint.setTextSize(20.0f);  
62.             //采用默认的宽度    
63.             textPaint.setTypeface(Typeface.DEFAULT);  
64.             //采用的颜色    
65.             textPaint.setColor(Color.YELLOW);  
66.             //阴影设置    
67.             //                textPaint.setShadowLayer(3f, 1, 1, Color.DKGRAY);    
68.               
69.             // 时间水印    
70.             String mark = getCurrTime("yyyy-MM-dd HH:mm:ss");  
71.             float textWidth = textPaint.measureText(mark);  
72.             canvas.drawText(mark, width - textWidth - 10, height - 26, textPaint);  
73.               
74.             bos = new BufferedOutputStream(new FileOutputStream(file));  
75.               
76.             int quaility = (int)(100 / percent > 80 ? 80 : 100 / percent);  
77.             icon.compress(CompressFormat.JPEG, quaility, bos);  
78.             bos.flush();  
79.         }  
80.         catch (Exception e)  
81.         {  
82.             e.printStackTrace();  
83.         }  
84.         finally  
85.         {  
86.             isFinished = true;  
87.             if (bos != null)  
88.             {  
89.                 try  
90.                 {  
91.                     bos.close();  
92.                 }  
93.                 catch (IOException e)  
94.                 {  
95.                     e.printStackTrace();  
96.                 }  
97.             }  
98.             if (icon != null && !icon.isRecycled())  
99.             {  
100.                 icon.recycle();  
101.                 icon = null;  
102.                 System.gc();  
103.             }  
104.         }  
105.     }  
106. }  

    private class PhotoTask extends Thread    {        private String file;                private boolean isFinished;                public PhotoTask(String file)        {            this.file = file;        }                @Override        public void run()        {            BufferedOutputStream bos = null;            Bitmap icon = null;            try            {                BitmapFactory.Options options = new BitmapFactory.Options();                options.inJustDecodeBounds = true;                BitmapFactory.decodeFile(file, options); //此时返回bm为空                float percent =                    options.outHeight > options.outWidth ? options.outHeight / 960f : options.outWidth / 960f;                                if (percent < 1)                {                    percent = 1;                }                int width = (int)(options.outWidth / percent);                int height = (int)(options.outHeight / percent);                icon = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);                                //初始化画布 绘制的图像到icon上                  Canvas canvas = new Canvas(icon);                //建立画笔                  Paint photoPaint = new Paint();                //获取跟清晰的图像采样                  photoPaint.setDither(true);                //过滤一些                  //                    photoPaint.setFilterBitmap(true);                options.inJustDecodeBounds = false;                                Bitmap prePhoto = BitmapFactory.decodeFile(file);                if (percent > 1)                {                    prePhoto = Bitmap.createScaledBitmap(prePhoto, width, height, true);                }                                canvas.drawBitmap(prePhoto, 0, 0, photoPaint);                                if (prePhoto != null && !prePhoto.isRecycled())                {                    prePhoto.recycle();                    prePhoto = null;                    System.gc();                }                                //设置画笔                  Paint textPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);                //字体大小                  textPaint.setTextSize(20.0f);                //采用默认的宽度                  textPaint.setTypeface(Typeface.DEFAULT);                //采用的颜色                  textPaint.setColor(Color.YELLOW);                //阴影设置                  //                textPaint.setShadowLayer(3f, 1, 1, Color.DKGRAY);                                  // 时间水印                  String mark = getCurrTime("yyyy-MM-dd HH:mm:ss");                float textWidth = textPaint.measureText(mark);                canvas.drawText(mark, width - textWidth - 10, height - 26, textPaint);                                bos = new BufferedOutputStream(new FileOutputStream(file));                                int quaility = (int)(100 / percent > 80 ? 80 : 100 / percent);                icon.compress(CompressFormat.JPEG, quaility, bos);                bos.flush();            }            catch (Exception e)            {                e.printStackTrace();            }            finally            {                isFinished = true;                if (bos != null)                {                    try                    {                        bos.close();                    }                    catch (IOException e)                    {                        e.printStackTrace();                    }                }                if (icon != null && !icon.isRecycled())                {                    icon.recycle();                    icon = null;                    System.gc();                }            }        }    }

[java] view plaincopyprint?

1. private static String getCurrTime(String pattern)  
2. {  
3.     if (pattern == null)  
4.     {  
5.         pattern = "yyyyMMddHHmmss";  
6.     }  
7.     return (new SimpleDateFormat(pattern)).format(new Date());  
8. }  

    private static String getCurrTime(String pattern)    {        if (pattern == null)        {            pattern = "yyyyMMddHHmmss";        }        return (new SimpleDateFormat(pattern)).format(new Date());    }

以下转自eoe关于图片内存溢出的问题处理分享（没有实际验证）

腾讯高级开发工程师-郭大扬【Android图像处理】

实际问题解决分案分享

最有效方法
options.inPurgeable = true;
options.inInputShareable = true;

 

接下来讲一个比较细节的问题，我们做图像处理，老是会遇到out of memory，实在很抓狂，有时候搞半天都不知道为什么。搜索了上百个帖子都说把它压成一半，实际上我就不想压成一半，我就要这么大。我这里摸索到一个比较好的解决方法。我自己觉得百试不爽的加上这两句属性，一个是代表可以擦除的，一个代表可以共享，我现在一般不会遇到内存溢出的情况。