title: Camera Preview is too dark in low light android
body: <p>My camera app preview is too dark in low light. If I open my google camera it will increase brightness inside the preview so that our face is visible to take photos. But my preview is completely dark. I have handled the brightness and lightsensor. My Lightsensor works when is some light. I need to make preview is visible. Let me what should I have to handle?</p>
  
  <pre><code> public void initialBrightness() {
          try {
              brightnessMode = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE);
          } catch (Settings.SettingNotFoundException e) {
              e.printStackTrace();
          }
          if (brightnessMode == Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC) {
              Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE,
                      Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
              brightnessModeAuto = true;
          }
          Settings.System.putInt(this.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, 95);
          WindowManager.LayoutParams lp = getWindow().getAttributes();
          lp.screenBrightness = 100;
          getWindow().setAttributes(lp);
  
      } 
  </code></pre>
  
  <p>I'm calling this method in onCreate method before camera preview class is called. </p>