Android 摄像头高斯模糊的示例代码

/**
 * 转换数据并进行模糊处理
 */
public Bitmap blur(byte[] data, Camera camera,float blurvaule){
  Camera.Size previewSize = camera.getParameters().getPreviewSize();
  if (yuvType == null)
  {
    yuvType = new Type.Builder(rs, Element.U8(rs)).setX(data.length);
    in = Allocation.createTyped(rs, yuvType.create(), Allocation.USAGE_SCRIPT);

    rgbaType = new Type.Builder(rs, Element.RGBA_8888(rs)).setX(previewSize.width).setY(previewSize.height);
    out = Allocation.createTyped(rs, rgbaType.create(), Allocation.USAGE_SCRIPT);
  }

  in.copyFrom(data);

  yuvToRgbIntrinsic.setInput(in);
  yuvToRgbIntrinsic.forEach(out);

  Bitmap bmpout = Bitmap.createBitmap(previewSize.width, previewSize.height, Bitmap.Config.ARGB_8888);
  out.copyTo(bmpout);
  //return adjustPhotoRotation(blurBitmap(bmpout,blurvaule),90);
  return blurBitmap(bmpout,blurvaule);
}


/**
 * 模糊处理Bitmap
 * @param bitmap
 * @return
 */
private Bitmap blurBitmap(Bitmap bitmap,float vaule) {
  // 用需要创建高斯模糊bitmap创建一个空的bitmap
  Bitmap outBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
  // 初始化Renderscript，这个类提供了RenderScript context，
  // 在创建其他RS类之前必须要先创建这个类，他控制RenderScript的初始化，资源管理，释放
  // 创建高斯模糊对象

  // 创建Allocations，此类是将数据传递给RenderScript内核的主要方法，
  // 并制定一个后备类型存储给定类型
  Allocation allIn = Allocation.createFromBitmap(rs, bitmap);
  Allocation allOut = Allocation.createFromBitmap(rs, outBitmap);
  // 设定模糊度
  blurScript.setRadius(vaule);
  // Perform the Renderscript
  blurScript.setInput(allIn);
  blurScript.forEach(allOut);
  // Copy the final bitmap created by the out Allocation to the outBitmap
  allOut.copyTo(outBitmap);
  // recycle the original bitmap
  bitmap.recycle();
  // After finishing everything, we destroy the Renderscript.
  rs.destroy();
  return outBitmap;
}

defaultConfig {
  .......

  renderscriptTargetApi 21
  renderscriptSupportModeEnabled true
}