SystemSettingUtil工具类

`public class SystemSettingUtil {

private static final int LOG_DOMAIN = 218107648;
private static final String TAG = "SystemSettingUtil";
private static final HiLogLabel LOG_LABEL = new HiLogLabel(0, LOG_DOMAIN, TAG);
private static final String LOG_FORMAT = "%{public}s";

private static final String GET_GLOBAL = "GET_global";
private static final String GET_SECURE = "GET_secure";
private static final String GET_SYSTEM = "GET_system";
private static final String SETTING_VALUE = "value";
private static final String SYSTEM_SETTING = "dataability:///settings";

public static String getGlobal(String key) {
    return getSettingValueAsString(key, GET_GLOBAL);
}

public static String getSecure(String key) {
    return getSettingValueAsString(key, GET_SECURE);
}

public static String getSystem(String key) {
    return getSettingValueAsString(key, GET_SYSTEM);
}

public static String getSettingValueAsString(String key, String method) {
    if (TextTool.isNullOrEmpty(key)) {
        HiLog.warn(LOG_LABEL, LOG_FORMAT, "getSettingValueAsString -> key is null or empty");
        return "";
    } else if (TextTool.isNullOrEmpty(method)) {
        HiLog.warn(LOG_LABEL, LOG_FORMAT, "getSettingValueAsString -> method is null or empty");
        return "";
    } else {
        try {
            return DataAbilityHelper.creator(ContextUtil.getHapGlobalContext()).call(Uri.parse(SYSTEM_SETTING),
                    method, key, null).getString(SETTING_VALUE, "");
        } catch (IllegalArgumentException | IllegalStateException | DataAbilityRemoteException e) {
            HiLog.error(LOG_LABEL, LOG_FORMAT, "getSettingValueAsString -> Exception");
            return "";
        }
    }
}

}`

ContextUtil工具类

`public class ContextUtil {

private static Context sHapGlobalContext;

public static Context getHapGlobalContext() {
    return sHapGlobalContext;
}

public static void setHapGlobalContext(Context context) {
    if (context != null) {
        sHapGlobalContext = context;
    }
}

}`

使用方法：

在MyApplication onInitialize调用ContextUtil.setHapGlobalContext(this)设置全局Context；

调用SystemSettingUtil.getXXX。

注：key常量可使用hdc shell执行以下命令获取。

settings list system

settings list secure

settings list global

代码里怎么区分用户是否调整了系统字体大小设置里【显示大小】？

https://developer.huawei.com/consumer/cn/forum/topic/0202539565144520016?fid=23

(出处: 论坛首页)

解决方案：

private static final String INIT_DPI = "init_dpi"; private static final String DISPLAY_DENSITY_FORCED = "display_density_forced"; SystemSettingUtil.getSecure(INIT_DPI); SystemSettingUtil.getSecure(DISPLAY_DENSITY_FORCED);

display_density_forced为空即显示大小为默认，display_density_forced<init_dpi显示大小为小，display_density_forced>init_dpi显示大小为大，未修改过显示大小时两项都为空。

原文链接：https://developer.huawei.com/consumer/cn/forum/topic/0202553488903740688?fid=0101303901040230869
原作者：π