Question

我有一个使用Scala Play Framework（2.3.X）的应用程序。我的一个类需要在日志中写东西。为此，我使用

public class VideoCapture extends Activity implements OnClickListener, SurfaceHolder.Callback { MediaRecorder recorder; SurfaceHolder holder; boolean recording = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); recorder = new MediaRecorder(); initRecorder(); setContentView(R.layout.main); SurfaceView cameraView = (SurfaceView) findViewById(R.id.CameraView); holder = cameraView.getHolder(); holder.addCallback(this); holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); cameraView.setClickable(true); cameraView.setOnClickListener(this); } private void initRecorder() { recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT); recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT); CamcorderProfile cpHigh = CamcorderProfile .get(CamcorderProfile.QUALITY_HIGH); recorder.setProfile(cpHigh); recorder.setOutputFile("/sdcard/videocapture_example.mp4"); recorder.setMaxDuration(50000); // 50 seconds recorder.setMaxFileSize(5000000); // Approximately 5 megabytes } private void prepareRecorder() { recorder.setPreviewDisplay(holder.getSurface()); try { recorder.prepare(); } catch (IllegalStateException e) { e.printStackTrace(); finish(); } catch (IOException e) { e.printStackTrace(); finish(); } } public void onClick(View v) { if (recording) { recorder.stop(); recording = false; // Let's initRecorder so we can record again initRecorder(); prepareRecorder(); } else { recording = true; recorder.start(); } } public void surfaceCreated(SurfaceHolder holder) { prepareRecorder(); } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } public void surfaceDestroyed(SurfaceHolder holder) { if (recording) { recorder.stop(); recording = false; } recorder.release(); finish(); } }

在Play应用程序下运行时，此工作正常。

但是当我使用外部独立应用程序（例如play.Logger.info("message")方法）运行此类时，日志不会出现在application.log

如何设置一个既可以在Play运行时也可以在Play外运行课程的记录器？

Answer 1

您可以尝试SLF4J LoggerFactory。如果你使用sbt，那么你可以在build.sbt中添加它，如下所示：

libraryDependencies ++= Seq("org.slf4j" % "slf4j-api" % "1.7.5",
                            "org.slf4j" % "slf4j-simple" % "1.7.5")

然后：

import org.slf4j.Logger
import org.slf4j.LoggerFactory

class SayHi {
  val logger = LoggerFactory.getLogger(classOf[SayHi])
  logger.info("Hi!")
}

object Main extends App {
  val p = new SayHi
}

在play框架之外记录类

1 个答案: