Android adjusts screen brightness implementation code _android

When adjusting the brightness of the screen, set the current activity brightness, and then save the brightness of the system.

1 onCreate () Check the system brightness and set the Seekbar:

     private void Screenbrightness_check () {///First turn off the system's brightness auto-adjust try {if (and Roid.provider.Settings.System.getInt (Getcontentresolver (), android.provider.Settings.System.SCREEN_BRIGHTNESS_ MODE) = = = Android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC) {Android . Provider. Settings.System.putInt (Getcontentresolver (), Android.provider.Settings.System.SCREEN_BRIGHTNESS_MO
              DE, Android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
              The catch (Settingnotfoundexception e) {//TODO auto-generated catch block
          E.printstacktrace (); //Gets the current brightness, and returns 255 intscreenbrightness= (int) (Android.provider.Settings.System.getInt Getcontentreso
          Lver (), Android.provider.Settings.System.SCREEN_BRIGHTNESS, 255)); Text, enterThe degree bar shows mseekbar_light.setprogress (intscreenbrightness);
         
     Mtextview_light.settext ("" +intscreenbrightness*100/255); }

2 Drag Seekbar to set the current activity brightness and save As System brightness:
         

Screen brightness private void setscreenbritness (int brightness) {//Do not allow screen full dark if (brightness<=1)
          {Brightness=1;
          //Set screen brightness for current activity windowmanager.layoutparams LP = This.getwindow (). GetAttributes (); 
          0 to 1, adjust brightness dark to full bright lp.screenbrightness = float.valueof (brightness/255f);
    
          This.getwindow (). SetAttributes (LP); Save As System brightness Method 1 Android.provider.Settings.System.putInt (Getcontentresolver (), ANDROID.PROVIDER.S Ettings.
         
          system.screen_brightness, brightness); 
Save As System brightness Method 2//URI URI = Android.provider.Settings.System.getUriFor ("screen_brightness");  
Android.provider.Settings.System.putInt (Getcontentresolver (), "screen_brightness", brightness); 
Resolver.registercontentobserver (URI, True, Mycontentobserver);
         
          Getcontentresolver (). Notifychange (URI, NULL); Change LightThe degree text displays Mtextview_light.settext ("" +brightness*100/255); }