本文主要是android中几个图片处理的工具，包括(拼接图片，截屏，将控件转换成图片，drawable转成图片，保存bitmap到指定路径)_android drawable 保存为 图片

本文主要是android中几个图片处理的工具，包括(拼接图片，截屏，将控件转换成图片，drawable转成图片，保存bitmap到指定路径)

当点击按钮时，将当前手机屏幕中显示的页面以图片的形式保存起来

1. 拼接图片

   1. 竖直拼接

      private Bitmap add2Bitmap(Bitmap first, Bitmap second) {
      
          int width = first.getWidth();       
          int height = first.getHeight() + second.getHeight();
      
          Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
          Canvas canvas = new Canvas(result);
          canvas.drawBitmap(first, 0, 0, null);
          canvas.drawBitmap(second, 0, first.getHeight(), null);
          return result;
      }
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   2. 横向拼接

      private Bitmap add2Bitmap(Bitmap first, Bitmap second) {
      
          int width = first.getWidth() + second.getWidth();
          int height = first.getHeight();
      
          Bitmap result = Bitmap.createBitmap(width,height,Bitmap.Config.ARGB_8888);
          Canvas canvas = new Canvas(result);
          canvas.drawBitmap(first, 0, 0, null);
          canvas.drawBitmap(second, first.getWidth(), 0, null);
          return result;
      }
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2. 截屏-将当前屏幕图片转成Bitmap

       private Bitmap captureScreen(Activity context) {
           View cv = context.getWindow().getDecorView();
           Bitmap bmp = Bitmap.createBitmap(cv.getWidth(), cv.getHeight(), Bitmap.Config.ARGB_8888);
           Canvas canvas = new Canvas(bmp);
           cv.draw(canvas);
           return bmp;
       }
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3. 将当前控件转成Bitmap——WebView

   private Bitmap captureWebView(WebView webView) {
       Picture snapShot = webView.capturePicture();
   
       Bitmap bmp = Bitmap.createBitmap(snapShot.getWidth(), snapShot.getHeight(), Bitmap.Config.ARGB_8888);
       Canvas canvas = new Canvas(bmp);
       snapShot.draw(canvas);
       return bmp;
   }
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4. 将drawable转换成bitmap

   private Bitmap draw2Bit(Drawable drawable) {
   
       int width = drawable.getIntrinsicWidth();
       int height = drawable.getIntrinsicHeight();
       Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565;// 取drawable的颜色格式
       Bitmap bitmap = Bitmap.createBitmap(width, height, config);// 建立对应bitmap
       Canvas canvas = new Canvas(bitmap);// 建立对应bitmap的画布
       drawable.setBounds(0, 0, width, height);
       drawable.draw(canvas);// 把drawable内容画到画布中
       return bitmap;
   }
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5. 保存bitmap到指定路径

       public void saveFile(Bitmap bitmap, String filename) {
   
           try {
               File file = new File(Environment.getExternalStorageDirectory(), filename);
               FileOutputStream fileOutputStream = new FileOutputStream(file);
               if (fileOutputStream != null) {
                   bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fileOutputStream);
   
                   fileOutputStream.flush();
   
                   fileOutputStream.close();
   
               }
   
           } catch (FileNotFoundException e) {
               e.printStackTrace();
           } catch (IOException e) {
               e.printStackTrace();
   
           }
       }
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