获取和设置系统锁屏,屏幕亮度

一些应用中可用调节屏幕的亮,和锁屏时间.我们可通过调用系统的接口改变其中的值来获得我们想要的结果.

锁屏代码如下:

获取系统锁屏的时间
screenOffTime = Settings.System.getInt(getContentResolver(),
Settings.System.SCREEN_OFF_TIMEOUT);
设置系统锁屏的时间
/**
* 设置系统锁屏时间 (毫秒)
*
* @param context
* @param paramInt
*/
public void setScreenOffTime(int paramInt) {
try {
Settings.System.putInt(getContentResolver(),
Settings.System.SCREEN_OFF_TIMEOUT, paramInt);
} catch (Exception localException) {
localException.printStackTrace();
}
}

屏幕亮度 代码如下:

import android.content.ContentResolver;
import android.content.Context;
import android.net.Uri;
import android.provider.Settings;

public class BrightUtil {
/**
* 获得当前屏幕亮度的模式 SCREEN_BRIGHTNESS_MODE_AUTOMATIC = 1 为自动调节屏幕亮度
* SCREEN_BRIGHTNESS_MODE_MANUAL = 0 为手动调节屏幕亮度
*
* @param context
* @return
*/
public static int getScreenMode(Context context) {
int screenMode = 0;
try {
screenMode = Settings.System.getInt(context.getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS_MODE);
} catch (Exception localException) {
}
return screenMode;
}

/**
* 获得当前屏幕亮度值 (0--255)
*
* @param context
* @return
*/
public static int getScreenBrightness(Context context) {
int screenBrightness = 255;
try {
screenBrightness = Settings.System.getInt(
context.getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS);
} catch (Exception localException) {
}
return screenBrightness;
}

/**
* 设置当前屏幕亮度的模式 SCREEN_BRIGHTNESS_MODE_AUTOMATIC = 1 为自动调节屏幕亮度
* SCREEN_BRIGHTNESS_MODE_MANUAL = 0 为手动调节屏幕亮度
*
* @param context
* @param paramInt
*/
public static void changeScreenMode(Context context, int paramInt) {
try {
if (paramInt == 0) {
stopAutoBrightness(context);
} else {
startAutoBrightness(context);
}
Settings.System.putInt(context.getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS_MODE, paramInt);
} catch (Exception localException) {
localException.printStackTrace();
}
}

/**
* 设置当前屏幕亮度值 0--255
*
* @param context
* @param paramInt
*/
public static void saveScreenBrightness(Context context, int paramInt) {
try {
Settings.System.putInt(context.getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS, paramInt);
} catch (Exception localException) {
localException.printStackTrace();
}
}

/**
* 停止自动亮度调节
*
* @param context
*/
public static void stopAutoBrightness(Context context) {
final ContentResolver resolver = context.getContentResolver();
Settings.System.putInt(resolver,
Settings.System.SCREEN_BRIGHTNESS_MODE,
Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
final Uri uri = android.provider.Settings.System
.getUriFor("screen_brightness");
resolver.notifyChange(uri, null);
}

/**
* 开启亮度自动调节
*
* @param context
*/
public static void startAutoBrightness(Context context) {
final ContentResolver resolver = context.getContentResolver();
Settings.System.putInt(resolver,
Settings.System.SCREEN_BRIGHTNESS_MODE,
Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC);
final Uri uri = android.provider.Settings.System
.getUriFor("screen_brightness");
resolver.notifyChange(uri, null);
}

}

权限如下:

<uses-permission android:name="android.permission.WRITE_SETTINGS" />