Brightness adjustment function set by mobile phone

From: http://blog.csdn.net/cys410/article/details/7346114

1. brightness settings

// Determine whether to automatically adjust public static Boolean isautobrightness (contentresolver acontentresolver) {Boolean automicbrightness = false; try {automicbrightness = settings. system. getint (acontentresolver, settings. system. screen_brightness_mode) = settings. system. screen_brightness_mode_automatic;} catch (settingnotfoundexception e) {e. printstacktrace ();} return automicbrightness;} // obtain the current brightness public static int getscreenbrightness (context) {int nowbrightnessvalue = 0; contentresolver resolver = context. getcontentresolver (); try {nowbrightnessvalue = android. provider. settings. system. getint (Resolver, settings. system. screen_brightness);} catch (exception e) {e. printstacktrace ();} return nowbrightnessvalue;} // sets the brightness of the current screen. Public static void setbrightness (activity context, int brightness) {windowmanager. layoutparams Lp = context. getwindow (). getattributes (); LP. screenbrightness = float. valueof (brightness) * (1f/255f); context. getwindow (). setattributes (LP);} // turn off the screen brightness to automatically adjust public static void stopautobrightness (activity) {settings. system. putint (activity. getcontentresolver (), settings. system. screen_brightness_mode, settings. system. screen_brightness_mode_manual);} // enable the screen brightness to automatically adjust public static void startautobrightness (activity) {settings. system. putint (activity. getcontentresolver (), settings. system. screen_brightness_mode, settings. system. screen_brightness_mode_automatic);} // Save the brightness of the screen. Public static void savebrightness (contentresolver resolver, int brightness) {URI uri = android. provider. settings. system. geturifor ("screen_brighness"); settings. system. putint (Resolver, "screen_brightness", brightness); resolver. policychange (Uri, null );}

2. xml configuration file

Main. xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <Button        android:id="@+id/btn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="btn" /></LinearLayout>

Dialog. xml

<? XML version = "1.0" encoding = "UTF-8"?> <Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android" Android: layout_width = "fill_parent" Android: layout_height = "fill_parent" Android: Orientation = "vertical"> <checkbox Android: id = "@ + ID/CB" Android: layout_width = "220dip" Android: layout_height = "wrap_content" Android: text = "My name is xiaoq"/> <seekbar Android: id = "@ + ID/seek" Android: layout_width = "fill_parent" Android: layout_height = "wrap_content" Android: layout_margin = "10dip" drag seekbar to manually adjust = "" Android: max = "500"/> </linearlayout>

3. Activity

Private Boolean FF = false; private button BTN; private seekbar Sb; private checkbox CB; private view V1; private alertdialog ALT; private int m; @ overridepublic void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. main); BTN = (button) This. findviewbyid (R. id. BTN); FF = This. getsharedpreferences ("hoperun", mode_private ). getboolean ("checkable", true); M = This. get Sharedpreferences ("hoperun", mode_private ). getint ("light", brightutil. getscreenbrightness (this); toast. maketext (this, m + "", 10000 ). show (); V1 = This. mm (this); BTN. setonclicklistener (New onclicklistener () {@ overridepublic void onclick (view v) {dialogactivity. this. alt = new alertdialog. builder (dialogactivity. this ). setview (V1 ). settitle ("test "). seticon (R. drawable. ic_launcher ). setmessage ("Current brightness is" + M ). setp Ositivebutton ("ddddd", new dialoginterface. onclicklistener () {@ overridepublic void onclick (dialoginterface dialog, int which) {editor ET = dialogactivity. this. getsharedpreferences ("hoperun", mode_private ). edit (); If (FF) et. putboolean ("checkable", ff); else {et. putboolean ("checkable", ff); toast. maketext (dialogactivity. this, M + "", 10000 ). show (); et. putint ("light", m);} et. commit ();}}). show () ;}}); handle () ;} Private view mm (dialogactivity) {v1 = layoutinflater. from (this ). inflate (R. layout. dialog, null); sb = (seekbar) v1.findviewbyid (R. id. seek); Cb = (checkbox) v1.findviewbyid (R. id. CB); Return V1;} private void handle () {If (FF) {If (! Brightutil. isautobrightness (this. getcontentresolver () brightutil. startautobrightness (this); CB. setchecked (true); sb. setvisibility (sb. gone); M = brightutil. getscreenbrightness (this); brightutil. setbrightness (this, m);} else {If (brightutil. isautobrightness (this. getcontentresolver () {brightutil. stopautobrightness (this);} CB. setchecked (false); sb. setvisibility (sb. visible); sb. setprogress (m); sb. setonseekbarch Angelistener (New onseekbarchangelistener () {@ overridepublic void onprogresschanged (seekbar, int progress, Boolean fromuser) {M = progress; brightutil. setbrightness (dialogactivity. this, m); Alt. setmessage ("Current brightness is" + M); toast. maketext (dialogactivity. this, M + "", 10000 ). show () ;}@ overridepublic void onstarttrackingtouch (seekbar) {M = seekbar. getprogress (); brightutil. setbrightness (dialogacti Invalid. this, m); Alt. setmessage ("Current brightness is" + M); toast. maketext (dialogactivity. this, M + "", 10000 ). show () ;}@ overridepublic void onstoptrackingtouch (seekbar) {M = seekbar. getprogress (); brightutil. setbrightness (dialogactivity. this, m); Alt. setmessage ("Current brightness is" + M); toast. maketext (dialogactivity. this, M + "", 10000 ). show () ;}}) ;}cb. setoncheckedchangelistener (New oncheckedchangelistener () {@ overridepublic Void oncheckedchanged (compoundbutton buttonview, Boolean ischecked) {If (CB. ischecked () {If (! Brightutil. isautobrightness (dialogactivity. this. getcontentresolver () brightutil. startautobrightness (dialogactivity. this); CB. setchecked (true); sb. setvisibility (sb. gone); Alt. setmessage ("Current brightness:" + brightutil. getscreenbrightness (dialogactivity. this); FF = true;} else {FF = false; If (brightutil. isautobrightness (dialogactivity. this. getcontentresolver () {brightutil. stopautobrightness (dialogactivity. this);} CB. setchecked (false); sb. setvisibility (sb. visible); M = dialogactivity. this. getsharedpreferences ("hoperun", mode_private ). getint ("light", brightutil. getscreenbrightness (dialogactivity. this); sb. setprogress (m); Alt. setmessage ("Current brightness:" + M); sb. setonseekbarchangelistener (New onseekbarchangelistener () {@ overridepublic void onprogresschanged (seekbar, int progress, Boolean fromuser) {M = progress; brightutil. setbrightness (dialogactivity. this, m); Alt. setmessage ("Current brightness is" + M); toast. maketext (dialogactivity. this, brightutil. getscreenbrightness (dialogactivity. this) + "", 10000 ). show () ;}@ overridepublic void onstarttrackingtouch (seekbar) {M = seekbar. getprogress (); brightutil. setbrightness (dialogactivity. this, m); Alt. setmessage ("Current brightness is" + M);} @ overridepublic void onstoptrackingtouch (seekbar) {M = seekbar. getprogress (); brightutil. setbrightness (dialogactivity. this, m); Alt. setmessage ("Current brightness is" + M); toast. maketext (dialogactivity. this, brightutil. getscreenbrightness (dialogactivity. this) + "", 10000 ). show ();}});}}});}

 

Note:

This has not been tested on a real machine. I will test it on my mobile phone and delete it.