1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.tv.common.util; 18 19 import android.util.Log; 20 import java.lang.reflect.InvocationTargetException; 21 import java.lang.reflect.Method; 22 23 /** 24 * Proxy class that gives an access to a hidden API {@link android.os.SystemProperties#getBoolean}. 25 */ 26 public class SystemPropertiesProxy { 27 private static final String TAG = "SystemPropertiesProxy"; 28 29 private SystemPropertiesProxy() {} 30 31 public static boolean getBoolean(String key, boolean def) throws IllegalArgumentException { 32 try { 33 Class SystemPropertiesClass = Class.forName("android.os.SystemProperties"); 34 Method getBooleanMethod = 35 SystemPropertiesClass.getDeclaredMethod( 36 "getBoolean", String.class, boolean.class); 37 getBooleanMethod.setAccessible(true); 38 return (boolean) getBooleanMethod.invoke(SystemPropertiesClass, key, def); 39 } catch (InvocationTargetException 40 | IllegalAccessException 41 | NoSuchMethodException 42 | ClassNotFoundException e) { 43 Log.e(TAG, "Failed to invoke SystemProperties.getBoolean()", e); 44 } 45 return def; 46 } 47 48 public static int getInt(String key, int def) throws IllegalArgumentException { 49 try { 50 Class SystemPropertiesClass = Class.forName("android.os.SystemProperties"); 51 Method getIntMethod = 52 SystemPropertiesClass.getDeclaredMethod("getInt", String.class, int.class); 53 getIntMethod.setAccessible(true); 54 return (int) getIntMethod.invoke(SystemPropertiesClass, key, def); 55 } catch (InvocationTargetException 56 | IllegalAccessException 57 | NoSuchMethodException 58 | ClassNotFoundException e) { 59 Log.e(TAG, "Failed to invoke SystemProperties.getInt()", e); 60 } 61 return def; 62 } 63 64 public static String getString(String key, String def) throws IllegalArgumentException { 65 try { 66 Class SystemPropertiesClass = Class.forName("android.os.SystemProperties"); 67 Method getIntMethod = 68 SystemPropertiesClass.getDeclaredMethod("get", String.class, String.class); 69 getIntMethod.setAccessible(true); 70 return (String) getIntMethod.invoke(SystemPropertiesClass, key, def); 71 } catch (InvocationTargetException 72 | IllegalAccessException 73 | NoSuchMethodException 74 | ClassNotFoundException e) { 75 Log.e(TAG, "Failed to invoke SystemProperties.get()", e); 76 } 77 return def; 78 } 79 } 80
