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Android 图片处理方法大全

Android编程 , 评论(3) , 引用(0) , 阅读(1577) 大 | 中 | 小

整理了一下目前Android开发中图片的各种处理方法：

Java代码

1.     
2.    /**     
3.      * 使头像变灰     
4.      * @param drawable     
5.      */      
6.     public static void porBecomeGrey(ImageView imageView, Drawable drawable) {      
7.         drawable.mutate();          
8.         ColorMatrix cm = new ColorMatrix();          
9.         cm.setSaturation(0);          
10.         ColorMatrixColorFilter cf = new ColorMatrixColorFilter(cm);          
11.         drawable.setColorFilter(cf);       
12.         imageView.setImageDrawable(drawable);      
13.     }  

 

Java 代码 复制内容到剪贴板

1.     
2. Drawable drawable = new FastBitmapDrawable(bitmap);    

Java 代码 复制内容到剪贴板

1.     
2. public byte[] getBitmapByte(Bitmap bitmap){        
3.     ByteArrayOutputStream out = new ByteArrayOutputStream();        
4.     bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);        
5.     try {        
6.         out.flush();        
7.         out.close();        
8.     } catch (IOException e) {        
9.         e.printStackTrace();        
10.     }        
11.     return out.toByteArray();        
12. }        
13.         
14.         
15. public Bitmap getBitmapFromByte(byte[] temp){        
16.     if(temp != null){        
17.         Bitmap bitmap = BitmapFactory.decodeByteArray(temp, 0, temp.length);        
18.         return bitmap;        
19.     }else{        
20.         return null;        
21.     }        
22. }    

Java 代码 复制内容到剪贴板

1.     
2. /**     
3.      * 将Drawable转化为Bitmap     
4.      * @param drawable     
5.      * @return     
6.      */      
7.     public static Bitmap drawableToBitmap(Drawable drawable) {      
8.         int width = drawable.getIntrinsicWidth();      
9.         int height = drawable.getIntrinsicHeight();      
10.         Bitmap bitmap = Bitmap.createBitmap(width, height, drawable      
11.                 .getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888      
12.                 : Bitmap.Config.RGB_565);      
13.         Canvas canvas = new Canvas(bitmap);      
14.         drawable.setBounds(0, 0, width, height);      
15.         drawable.draw(canvas);      
16.         return bitmap;      
17.     }  

Java 代码 复制内容到剪贴板

1.     
2. /**     
3.     * 获取图片的倒影     
4.     * @param bitmap     
5.     * @return     
6.     */      
7.     public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) {      
8.         final int reflectionGap = 4;      
9.         int width = bitmap.getWidth();      
10.         int height = bitmap.getHeight();      
11.       
12.         Matrix matrix = new Matrix();      
13.         matrix.preScale(1, -1);      
14.       
15.         Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0, height / 2,      
16.                 width, height / 2, matrix, false);      
17.       
18.         Bitmap bitmapWithReflection = Bitmap.createBitmap(width,      
19.                 (height + height / 2), Config.ARGB_8888);      
20.       
21.         Canvas canvas = new Canvas(bitmapWithReflection);      
22.         canvas.drawBitmap(bitmap, 0, 0, null);      
23.         Paint deafalutPaint = new Paint();      
24.         canvas.drawRect(0, height, width, height + reflectionGap, deafalutPaint);      
25.       
26.         canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);      
27.       
28.         Paint paint = new Paint();      
29.         LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0,      
30.                 bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff,      
31.                 0x00ffffff, TileMode.CLAMP);      
32.         paint.setShader(shader);      
33.         paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));      
34.         canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()      
35.                 + reflectionGap, paint);      
36.         return bitmapWithReflection;      
37.     }  

Java 代码 复制内容到剪贴板

1.     
2. /**     
3.     * 把图片变成圆角       
4.     * @param bitmap 需要修改的图片       
5.     * @param pixels 圆角的弧度       
6.     * @return 圆角图片       
7.     */          
8.    public static Bitmap toRoundCorner(Bitmap bitmap, int pixels) {          
9.            
10.        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);          
11.        Canvas canvas = new Canvas(output);          
12.            
13.        final int color = 0xff424242;          
14.        final Paint paint = new Paint();          
15.        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());          
16.        final RectF rectF = new RectF(rect);          
17.        final float roundPx = pixels;          
18.            
19.        paint.setAntiAlias(true);          
20.        canvas.drawARGB(0, 0, 0, 0);          
21.        paint.setColor(color);          
22.        canvas.drawRoundRect(rectF, roundPx, roundPx, paint);          
23.            
24.        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));          
25.        canvas.drawBitmap(bitmap, rect, rect, paint);          
26.            
27.        return output;          
28.    }    

Java 代码 复制内容到剪贴板

1.     
2. /**     
3.      * 缩放图片     
4.      * @param bmp     
5.      * @param width     
6.      * @param height     
7.      * @return     
8.      */      
9.     public static Bitmap PicZoom(Bitmap bmp, int width, int height) {      
10.         int bmpWidth = bmp.getWidth();      
11.         int bmpHeght = bmp.getHeight();      
12.         Matrix matrix = new Matrix();      
13.         matrix.postScale((float) width / bmpWidth, (float) height / bmpHeght);      
14.       
15.         return Bitmap.createBitmap(bmp, 0, 0, bmpWidth, bmpHeght, matrix, true);      
16.     }  

Java 代码 复制内容到剪贴板

1.     
2. /**     
3.      * @param photoPath --原图路经     
4.      * @param aFile     --保存缩图     
5.      * @param newWidth  --缩图宽度     
6.      * @param newHeight --缩图高度     
7.      */      
8.     public static boolean bitmapToFile(String photoPath, File aFile, int newWidth, int newHeight) {      
9.         BitmapFactory.Options options = new BitmapFactory.Options();      
10.         options.inJustDecodeBounds = true;      
11.         // 获取这个图片的宽和高      
12.         Bitmap bitmap = BitmapFactory.decodeFile(photoPath, options);      
13.         options.inJustDecodeBounds = false;      
14.        
15.         //计算缩放比      
16.         options.inSampleSize = reckonThumbnail(options.outWidth, options.outHeight, newWidth, newHeight);      
17.       
18.         bitmap = BitmapFactory.decodeFile(photoPath, options);      
19.       
20.         try {      
21.             ByteArrayOutputStream baos = new ByteArrayOutputStream();      
22.             bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);      
23.             byte[] photoBytes = baos.toByteArray();      
24.       
25.             if (aFile.exists()) {      
26.                 aFile.delete();      
27.             }      
28.             aFile.createNewFile();      
29.       
30.             FileOutputStream fos = new FileOutputStream(aFile);      
31.             fos.write(photoBytes);      
32.             fos.flush();      
33.             fos.close();      
34.       
35.             return true;      
36.         } catch (Exception e1) {      
37.             e1.printStackTrace();      
38.             if (aFile.exists()) {      
39.                 aFile.delete();      
40.             }      
41.             Log.e("Bitmap To File Fail", e1.toString());      
42.             return false;      
43.         }      
44.     }  

Java 代码 复制内容到剪贴板

1.     
2. /**     
3.      * 计算缩放比     
4.      * @param oldWidth     
5.      * @param oldHeight     
6.      * @param newWidth     
7.      * @param newHeight     
8.      * @return     
9.      */      
10.     public static int reckonThumbnail(int oldWidth, int oldHeight, int newWidth, int newHeight) {      
11.         if ((oldHeight > newHeight && oldWidth > newWidth)      
12.                 || (oldHeight <= newHeight && oldWidth > newWidth)) {      
13.             int be = (int) (oldWidth / (float) newWidth);      
14.             if (be <= 1)      
15.                 be = 1;      
16.             return be;      
17.         } else if (oldHeight > newHeight && oldWidth <= newWidth) {      
18.             int be = (int) (oldHeight / (float) newHeight);      
19.             if (be <= 1)      
20.                 be = 1;      
21.             return be;      
22.         }      
23.       
24.         return 1;      
25.     }  

Android边框圆角

XML/HTML 代码 复制内容到剪贴板

1.     
2. <?xml version="1.0" encoding="utf-8"?>          
3. <shape xmlns:android="http://schema...android">            
4.     <solid android:color="#000000" />            
5.     <corners android:topLeftRadius="10dp"           
6.                     android:topRightRadius="10dp"            
7.                 android:bottomRightRadius="10dp"           
8.                 android:bottomLeftRadius="10dp"/>            
9. shape>    

解释：solid的表示填充颜色,为了简单，这里用的是黑色。

而corners则是表示圆角，注意的是这里bottomRightRadius是左下角而不是右下角，bottomLeftRadius右下角。
当然上面的效果也可以像下面一样设置,如下: "5dp" />  

 

源码下载：

下载文件 点击这里下载文件

 

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