OpenCV4Android拍摄静止图像

Question

我正在使用下面的代码来使用OnTouch事件捕获静止图像，但是我的应用程序一碰到就会崩溃：

public boolean onTouch(View v, MotionEvent event) {
    Log.i(TAG,"onTouch event");
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
    String currentDateandTime = sdf.format(new Date());
    String fileName = Environment.getExternalStorageDirectory().getPath() +
            "/DCIM/app/sample_picture_" + currentDateandTime + ".jpg";
    Toast.makeText(this, fileName + " saved", Toast.LENGTH_SHORT).show();
    Imgcodecs.imwrite(fileName,mRgba);
    return false;
}

我对opencv很陌生。谢谢你帮忙！

Answer 1

最后我发现了问题！mRgba没有在onCameraViewStarted()中初始化。

public boolean onTouch(View v, MotionEvent event) {
    Log.i(TAG,"onTouch event");
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
    String currentDateandTime = sdf.format(new Date());
    String fileName = Environment.getExternalStorageDirectory().getPath() +
            "/DCIM/app/sample_picture_" + currentDateandTime + ".jpg";
    Toast.makeText(this, fileName + " saved", Toast.LENGTH_SHORT).show();
    Imgcodecs.imwrite(fileName, mIntermediateMat);
    return false;
}