android - How to receive open cv imge in android phone

Question

I want to send a photo in open cv saved in cv::Mat object to android phone and I want to show it in an ImageView on android side I succeed to send the photo data and I received them in an array of integers (int[]) on android But my problem How to make bitmap from them to show as I don't know the construction of photo in android and its relation with open cv Mat;

Answer 1

首先，将 Mat 转换为 Android Bitmap（这是 OpenCV 的 Android 界面的代码）：

try {
    Utils.matToBitmap(mat, bitmap);
} catch (Exception e) {
    bitmap.recycle();
    bitmap = null;
}

然后，将 Bitmap 设置为 ImageView 的内容（您已在 XML 布局文件中定义）：

ImageView imageView = (ImageView) findViewById(R.id.imageView);
imageView.setImageBitmap(bitmap);

如果您将 OpenCV 的 C++ 接口与 Native Development Kit 一起使用，最好在 C++ 中执行第一步并从 C++ 方法返回位图，然后像以前一样在 Java 中执行第二步。