官方Android Camera2 录像示例--停止录像时崩溃修正

官方Android 使用Camera2示例项目地址：https://github.com/android/camera-samples

视频录像示例：https://github.com/android/camera-samples/tree/master/Camera2VideoJava

 官方Camera2VideoFragment.java停止录像代码，原来代码：会导致APP崩溃

    private void stopRecordingVideo() {
        // UI
        mIsRecordingVideo = false;
        mButtonVideo.setText(R.string.record);
        // Stop recording
        mMediaRecorder.stop();
        mMediaRecorder.reset();

        Activity activity = getActivity();
        if (null != activity) {
            Toast.makeText(activity, "Video saved: " + mNextVideoAbsolutePath,
                    Toast.LENGTH_SHORT).show();
            Log.d(TAG, "Video saved: " + mNextVideoAbsolutePath);
        }
        mNextVideoAbsolutePath = null;
        startPreview();
    }

解决方法如下：

    private void stopRecordingVideo() {
        // UI
        mIsRecordingVideo = false;
        mButtonVideo.setText(R.string.record);
        //必须将这一句放置到MediaRecorder停止释放的前面，
        //否则就会造成，接收数据方（Encoder）已经停止了，而发送数据的session还在运行。才会造成以上错误。
        startPreview();
        // Stop recording
        mMediaRecorder.stop();
        mMediaRecorder.reset();

        Activity activity = getActivity();
        if (null != activity) {
            Toast.makeText(activity, "Video saved: " + mNextVideoAbsolutePath,
                    Toast.LENGTH_SHORT).show();
            Log.d(TAG, "Video saved: " + mNextVideoAbsolutePath);
        }
        mNextVideoAbsolutePath = null;
        
    }

另外修改closePreviewSession()方法，增加红色字体代码：

private void closePreviewSession() {
        if (mPreviewSession != null) {
            try {
                mPreviewSession.stopRepeating();
                mPreviewSession.abortCaptures();
            } catch (CameraAccessException e) {
                e.printStackTrace();
            }
            mPreviewSession.close();
            mPreviewSession = null;
        }
    }

参考：https://blog.csdn.net/mengjiangyue/article/details/62435349