android - 如何在Android中增加相机的亮度

Question

如何更改相机的亮度级别？

Answer 1

使用@appleskin 指出的相机参数，这些方法中的任何一种都有帮助吗？ setWhiteBalance()或setExposureCompensation()

Answer 2

您可以传递您的相机参数。

Answer 3

试试 parameters.set("iso", 400); 或您的设备支持的任何 int 值

Answer 4

使用以下方式来增加或减少亮度（它用于活动，因此您也可以在任何地方用于相机或活动），它工作正常。所以它对任何人都有帮助。

在您的活动中调用以下函数：

    private void setSeekbar() {

    seekBar.setMax(255);
    float curBrightnessValue = 0;
    try {
        curBrightnessValue = android.provider.Settings.System.getInt(
                getContentResolver(),
                android.provider.Settings.System.SCREEN_BRIGHTNESS);
    } catch (SettingNotFoundException e) {
        e.printStackTrace();
    }

    int screen_brightness = (int) curBrightnessValue;
    seekBar.setProgress(screen_brightness);

    seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
        public void onStopTrackingTouch(SeekBar seekBar) {
            // Nothing handled here
        }

        public void onStartTrackingTouch(SeekBar seekBar) {
            // Nothing handled here
        }

        public void onProgressChanged(SeekBar seekBar, int progress,
                boolean fromUser) {
            // Set the minimal brightness level
            // if seek bar is 20 or any value below
            screenBrightness(progress);
            editor.putInt("brightness",progress);
            editor.commit();
        }
    });
  }

screenBrightness 的方法：

 private void screenBrightness(double newBrightnessValue) {
    /*
     * WindowManager.LayoutParams settings = getWindow().getAttributes();
     * settings.screenBrightness = newBrightnessValue;
     * getWindow().setAttributes(settings);
     */
          WindowManager.LayoutParams lp = getWindow().getAttributes();
          float newBrightness = (float) newBrightnessValue;
          lp.screenBrightness = newBrightness / (float) 255;
          getWindow().setAttributes(lp);
 }

在SeekBarChangeListener之前调用以下方法：

  void changeBrightnessMode() {

    try {
        int brightnessMode = Settings.System.getInt(getContentResolver(),
                Settings.System.SCREEN_BRIGHTNESS_MODE);
        if (brightnessMode == Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC) {
            Settings.System.putInt(getContentResolver(),
                    Settings.System.SCREEN_BRIGHTNESS_MODE,
                    Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
        }

    } catch (Exception e) {
        // do something useful

    }
}