keep screen on

android/app/src/main/java/tw/moonjuice/light_sensor_capture/MainActivity.java

@@ -9,6 +9,7 @@ import android.hardware.SensorEventListener;
 import android.hardware.SensorManager;
 import android.os.Bundle;
 import android.os.Environment;
+import android.view.WindowManager;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
@@ -47,6 +48,7 @@ public class MainActivity extends FlutterActivity implements EventChannel.Stream
     protected void onResume() {
         super.onResume();
         mSensorManager.registerListener(this, mLightSensor, SensorManager.SENSOR_DELAY_FASTEST);
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
     }
 
     @Override