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  • Android 编程下与系统屏幕亮度相关的操作

    部分定制的系统应用中需要去操作手机的屏幕亮度,这时候下面的代码可以满足改变屏幕亮度的需求:

    1. 清单文件中所需要添加的权限

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

    2. 操作系统屏幕亮度的相关代码

    /**
     * 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
     */
    private int getScreenMode() {
        int screenMode = 0;
        try {
            screenMode = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE);
        } catch (Exception localException) {
    
        }
        return screenMode;
    }
    
    /**
     * 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
     */
    private void setScreenMode(int paramInt) {
        try {
            Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, paramInt);
        } catch (Exception localException) {
            localException.printStackTrace();
        }
    }
    
    /**
     * 获得当前屏幕亮度值 0--255
     */
    private int getScreenBrightness() {
        int screenBrightness = 255;
        try {
            screenBrightness = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS);
        } catch (Exception localException) {
    
        }
        return screenBrightness;
    }
    
    /**
     * 设置当前屏幕亮度值 0--255
     */
    private void saveScreenBrightness(int paramInt) {
        try {
            Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, paramInt);
        } catch (Exception localException) {
            localException.printStackTrace();
        }
    }
    
    /**
     * 保存当前的屏幕亮度值,并使之生效
     */
    private void setScreenBrightness(int paramInt) {
        Window localWindow = getWindow();
        WindowManager.LayoutParams localLayoutParams = localWindow.getAttributes();
        float f = paramInt / 255.0F;
        localLayoutParams.screenBrightness = f;
        localWindow.setAttributes(localLayoutParams);
    }
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  • 原文地址:https://www.cnblogs.com/sunzn/p/3025629.html
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