个回答

• Li成伟

  2016-06-27 11:30:22

  已采纳

  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();
                  }
              }
          }
      }

  
  

  0

• qq_不想问_0

  2015-12-21 14:19:02

  这个貌似网上一堆啊  随便拿个来就可以用啊

  0