99 lines
3.2 KiB
Java
99 lines
3.2 KiB
Java
/*
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* Copyright (C) 2008 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.prefs;
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import java.io.File;
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/**
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* Manages the location of the android files (including emulator files, ddms config, debug keystore)
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*/
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public final class AndroidLocation {
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/**
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* Virtual Device folder inside the path returned by {@link #getFolder()}
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*/
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public static final String FOLDER_AVD = "avd";
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/**
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* Throw when the location of the android folder couldn't be found.
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*/
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public static final class AndroidLocationException extends Exception {
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private static final long serialVersionUID = 1L;
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public AndroidLocationException(String string) {
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super(string);
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}
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}
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private static String sPrefsLocation = null;
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/**
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* Returns the folder used to store android related files.
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* @return an OS specific path, terminated by a separator.
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* @throws AndroidLocationException
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*/
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public final static String getFolder() throws AndroidLocationException {
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if (sPrefsLocation == null) {
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String home = findValidPath("ANDROID_SDK_HOME", "user.home", "HOME");
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// if the above failed, we throw an exception.
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if (home == null) {
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throw new AndroidLocationException(
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"Unable to get the home directory. Make sure the user.home property is set up");
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} else {
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sPrefsLocation = home + File.separator + ".android" + File.separator;
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// make sure the folder exists!
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File f = new File(sPrefsLocation);
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if (f.exists() == false) {
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f.mkdir();
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} else if (f.isFile()) {
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throw new AndroidLocationException(sPrefsLocation +
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" is not a directory! This is required to run Android tools.");
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}
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}
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}
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return sPrefsLocation;
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}
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/**
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* Checks a list of system properties and/or system environment variables for validity, and
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* existing director, and returns the first one.
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* @param names
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* @return the content of the first property/variable.
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*/
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private static String findValidPath(String... names) {
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for (String name : names) {
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String path;
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if (name.indexOf('.') != -1) {
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path = System.getProperty(name);
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} else {
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path = System.getenv(name);
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}
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if (path != null) {
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File f = new File(path);
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if (f.isDirectory()) {
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return path;
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}
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}
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}
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return null;
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}
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}
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