Android 亮度調節

private void setBrightness( int barValue) {

int birghtness = barValue + MIN_BRIGHTNESS;

LayoutParams lp = getWindow().getAttributes();

lp. screenBrightness = (birghtness / 255.0F); // 預覽亮度, 一個浮點數0-1

getWindow().setAttributes(lp);

Settings.System. putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS , birghtness);// brightness設置屏幕亮度，值爲30-255

}

 

 

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

// 停止自動亮度調節

public static void stopAutoBrightness(Activity activity) {

 

Settings.System.putInt(activity.getContentResolver(),

Settings.System.SCREEN_BRIGHTNESS_MODE,

Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);

}

 

// 開啓自動亮度調節

public static void startAutoBrightness(Activity activity) {

 

Settings.System.putInt(activity.getContentResolver(),

Settings.System.SCREEN_BRIGHTNESS_MODE,

Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC);

}