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);
}
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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"
/>
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希望本文所述对大家android程序设计有所帮助。