本文实例讲述了android编程获取并设置activity亮度的方法。分享给大家供大家参考，具体如下：
此api只适合2.1以上版本：
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/** * 判断是否开启了自动亮度调节 * * @param acontext * @return */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;}/** * 获取屏幕的亮度 * * @param activity * @return */public static int getscreenbrightness(activity activity) { int nowbrightnessvalue = 0; contentresolver resolver = activity.getcontentresolver(); try { nowbrightnessvalue = android.provider.settings.system.getint( resolver, settings.system.screen_brightness); } catch (exception e) { e.printstacktrace(); } return nowbrightnessvalue;}/** * 设置亮度 * * @param activity * @param brightness */public static void setbrightness(activity activity, int brightness) { // settings.system.putint(activity.getcontentresolver(), // settings.system.screen_brightness_mode, // settings.system.screen_brightness_mode_manual); windowmanager.layoutparams lp = activity.getwindow().getattributes(); lp.screenbrightness = float.valueof(brightness) * (1f / 255f); activity.getwindow().setattributes(lp);}/** * 停止自动亮度调节 * * @param activity */public static void stopautobrightness(activity activity) { settings.system.putint(activity.getcontentresolver(), settings.system.screen_brightness, settings.system.screen_brightness_mode_manual);}/** * 开启亮度自动调节 * * @param activity */public static void startautobrightness(activity activity) { settings.system.putint(activity.getcontentresolver(), settings.system.screen_brightness_mode, settings.system.screen_brightness_mode_automatic);}/** * 保存亮度设置状态 * * @param resolver * @param brightness */public static void savebrightness(contentresolver resolver, int brightness) { uri uri = android.provider.settings.system .geturifor("screen_brightness"); android.provider.settings.system.putint(resolver, "screen_brightness", brightness); resolver.notifychange(uri, null);} |
使用seekbar进行亮度控制：
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sseekbar = (seekbar) findviewbyid(r.id.seek_bar);sseekbar.setonseekbarchangelistener(new onseekbarchangelistener() { @override public void onstoptrackingtouch(seekbar seekbar) { // todo auto-generated method stub } @override public void onstarttrackingtouch(seekbar seekbar) { } @override public void onprogresschanged(seekbar seekbar, int progress, boolean fromuser) { if (progress < 10) { } else { setbrightness(test2activity.this, progress); } }});//获取当前亮度的位置int a =getscreenbrightness(this);sseekbar.setprogress(a); |
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<seekbar android:id="@+id/seek_bar" android:layout_width="200dp" android:layout_height="wrap_content" android:layout_alignparentbottom="true" android:max="255" android:maxheight="8dp" android:minheight="8dp" android:paddingbottom="5dp" android:paddingleft="13dp" android:paddingright="13dp" android:progress="0" /> |
希望本文所述对大家android程序设计有所帮助。
