-
package com.sensor.demo;
-
-
/**
-
* from http://apps.hi.baidu.com/share/detail/53623456
-
*/
-
import android.app.Activity;
-
import android.content.ContentResolver;
-
import android.net.Uri;
-
import android.provider.Settings;
-
import android.provider.Settings.SettingNotFoundException;
-
import android.util.Log;
-
import android.view.WindowManager;
-
-
public class BrightnessTools {
-
/* Android的屏幕亮度好像在2.1+的时候提供了自动调节的功能,
-
* 所以,如果当开启自动调节功能的时候, 我们进行调节好像是没有一点作用的,
-
* 这点让我很是无语,结果只有进行判断,看是否开启了屏幕亮度的自动调节功能。
-
*/
-
-
-
-
/** * 判断是否开启了自动亮度调节 */
-
-
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;
-
}
-
//然后就是要觉得当前的亮度了,这个就比较纠结了:
-
-
/** * 获取屏幕的亮度 */
-
-
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;
-
}
-
-
//那如何修改屏幕的亮度呢?
-
-
-
-
/** * 设置亮度 */
-
-
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);
-
Log.d("lxy", "set lp.screenBrightness == " + lp.screenBrightness);
-
-
activity.getWindow().setAttributes(lp);
-
}
-
-
//那么,能设置了,但是为什么还是会出现,设置了,没反映呢?
-
-
//嘿嘿,那是因为,开启了自动调节功能了,那如何关闭呢?这才是最重要的:
-
-
/** * 停止自动亮度调节 */
-
-
public static void stopAutoBrightness(Activity activity) {
-
-
Settings.System.putInt(activity.getContentResolver(),
-
-
Settings.System.SCREEN_BRIGHTNESS_MODE,
-
-
Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
-
}
-
//能开启,那自然应该能关闭了哟哟,那怎么关闭呢?很简单的:
-
-
/** * 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);
-
-
}
-
-
//至此,应该说操作亮度的差不多都有了,结束!
-
//哎,本来认为是应该结束了,但是悲剧得是,既然像刚才那样设置的话,只能在当前的activity中有作用,一段退出的时候,会发现毫无作用,悲剧,原来是忘记了保存了。汗!
-
-
/** * 保存亮度设置状态 */
-
-
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.registerContentObserver(uri, true, myContentObserver);
-
-
resolver.notifyChange(uri, null);}
-
}
posted @
2016-01-25 15:54
vegatate
阅读(
298)
评论()
编辑
收藏
举报