When adjusting the screen brightness, set the current activity brightness first, and then save it as system brightness.
1 Check the system brightness in onCreate() and set seekBar:
private void screenBrightness_check()
{
//First turn off the system's brightness automatic adjustment try
{
if((getContentResolver(),.SCREEN_BRIGHTNESS_MODE) == .SCREEN_BRIGHTNESS_MODE_AUTOMATIC)
{
(getContentResolver(),
.SCREEN_BRIGHTNESS_MODE,
.SCREEN_BRIGHTNESS_MODE_MANUAL);
}
}
catch (SettingNotFoundException e)
{
// TODO Auto-generated catch block
();
}
//Get the current brightness, if the acquisition fails, return 255 intScreenBrightness=(int)((getContentResolver(),
.SCREEN_BRIGHTNESS,
255));
//Text and progress bar display mSeekBar_light.setProgress(intScreenBrightness);
mTextView_light.setText(""+intScreenBrightness*100/255);
}
2 When dragging seekBar, set the current activity brightness and save it as system brightness:
//Screen Brightness private void setScreenBritness(int brightness)
{
//Don't let the screen be completely dark if(brightness<=1)
{
brightness=1;
}
//Set the screen brightness of the current activity lp = ().getAttributes();
//0 to 1, adjust the brightness to full brightness = (brightness/255f);
().setAttributes(lp);
//Save as system brightness method 1 (getContentResolver(),
.SCREEN_BRIGHTNESS,
brightness);
//Save as system brightness method 2// Uri uri = ("screen_brightness");
// (getContentResolver(), "screen_brightness", brightness);
// // (uri, true, myContentObserver);
// getContentResolver().notifyChange(uri, null);
//Change brightness text display mTextView_light.setText(""+brightness*100/255);
}