如何在框架后面显示预览相机并拍摄包含框架的照片 [英] How to display preview camera behind a frame and take picture include frame

问题描述

我正在尝试使用相机API在android中构建相机应用。

I'm trying build a camera app in android using camera API.

我按照说明进行操作： https://examples.javacodegeeks.com/android/core/hardware/camera-hardware/android-camera- example / ，我已经构建了一个摄像头应用程序

I follow the instructions: https://examples.javacodegeeks.com/android/core/hardware/camera-hardware/android-camera-example/ and I have built one camera app

现在，我需要在框架内显示预览摄像头并拍照以包含框架

Now i need to display preview camera inside a frame and take picture include the frame

请参见以下两张图片：

资源文件夹中的框架： https://i.stack.imgur.com/AaNIQ.png

Frame in resource folder : https://i.stack.imgur.com/AaNIQ.png

照片我想实现： https://i.stack.imgur.com/UWXcq.jpg

任何人都可以给我建议，或者可能的话给我一个简单的例子？

Anyone can give me suggestions or if possible give me a simple example?

我在此搜索过但没有得到正确的电子

I searched about this but didn't get proper example.

非常感谢。

推荐答案

一半答案可以在这里找到： https://stackoverflow.com/a/47240902/192373

Half of the answer can be found here: https://stackoverflow.com/a/47240902/192373.

至于为全分辨率图像捕获保留相同的布局，首先请确保同步预览和图片大小。这并不意味着它们必须相同，但是纵横比应该相同。当长宽比更改以捕获照片时，某些设备会产生怪异的效果。

As for keeping the same layout for full-res picture capture, first of all make sure that you keep preview- and picture- sizes in sync. This does not mean that they must be the same, but the aspect ratios should. Some devices have weird effects when the aspect ratio changes to capture a photo.

下一步，您照常捕获jpeg，将其解压缩为位图，并与帧位图叠加（您可能需要在此处使用高分辨率版本的框架），并将两者结合起来（基于 https://stackoverflow.com / a / 4863551/192373 ）：

Next, you capture the jpeg as usual, unpack it to bitmap, overlay with the frame bitmap (you may need a hi-res version of your frame here) and combine the two (based on https://stackoverflow.com/a/4863551/192373):

public Bitmap combineImages(Bitmap picture, Bitmap frame) {
 Bitmap bmp = Bitmap.createBitmap(picture.getWidth(), picture.getHeight(), Bitmap.Config.ARGB_8888); 

 Canvas comboImage = new Canvas(bmp); 

 comboImage.drawBitmap(picture, 0f, 0f, null); 
 comboImage.drawBitmap(frame, 0f, 0f, null);  

 return bmp; 
} 

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