65 lines
2.2 KiB
Java
65 lines
2.2 KiB
Java
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.dialer.oem;
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import android.support.annotation.Nullable;
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import com.android.dialer.common.LogUtil;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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/**
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* Hacky way to call the hidden SystemProperties class API. Needed to get the real value of
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* ro.carrier and some other values.
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*/
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class SystemPropertiesAccessor {
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private Method systemPropertiesGetMethod;
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@SuppressWarnings("PrivateApi")
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public String get(String name) {
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Method systemPropertiesGetMethod = getSystemPropertiesGetMethod();
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if (systemPropertiesGetMethod == null) {
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return null;
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}
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try {
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return (String) systemPropertiesGetMethod.invoke(null, name);
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} catch (IllegalArgumentException | IllegalAccessException | InvocationTargetException e) {
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LogUtil.e("SystemPropertiesAccessor.get", "unable to invoke system method", e);
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return null;
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}
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}
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@SuppressWarnings("PrivateApi")
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private @Nullable Method getSystemPropertiesGetMethod() {
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if (systemPropertiesGetMethod != null) {
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return systemPropertiesGetMethod;
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}
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try {
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Class<?> systemPropertiesClass = Class.forName("android.os.SystemProperties");
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if (systemPropertiesClass == null) {
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return null;
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}
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systemPropertiesGetMethod = systemPropertiesClass.getMethod("get", String.class);
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return systemPropertiesGetMethod;
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} catch (ClassNotFoundException | NoSuchMethodException e) {
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LogUtil.e("SystemPropertiesAccessor.get", "unable to access system class", e);
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return null;
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}
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}
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}
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