| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.support.v4.os; |
| |
| import android.os.Build; |
| import android.os.Environment; |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| /** |
| * Helper for accessing features in {@link Environment} introduced after API |
| * level 4 in a backwards compatible fashion. |
| */ |
| public final class EnvironmentCompat { |
| private static final String TAG = "EnvironmentCompat"; |
| |
| /** |
| * Unknown storage state, such as when a path isn't backed by known storage |
| * media. |
| * |
| * @see #getStorageState(File) |
| */ |
| public static final String MEDIA_UNKNOWN = "unknown"; |
| |
| /** |
| * Returns the current state of the storage device that provides the given |
| * path. |
| * |
| * @return one of {@link #MEDIA_UNKNOWN}, {@link Environment#MEDIA_REMOVED}, |
| * {@link Environment#MEDIA_UNMOUNTED}, |
| * {@link Environment#MEDIA_CHECKING}, |
| * {@link Environment#MEDIA_NOFS}, |
| * {@link Environment#MEDIA_MOUNTED}, |
| * {@link Environment#MEDIA_MOUNTED_READ_ONLY}, |
| * {@link Environment#MEDIA_SHARED}, |
| * {@link Environment#MEDIA_BAD_REMOVAL}, or |
| * {@link Environment#MEDIA_UNMOUNTABLE}. |
| */ |
| public static String getStorageState(File path) { |
| if (Build.VERSION.SDK_INT >= 19) { |
| return EnvironmentCompatKitKat.getStorageState(path); |
| } |
| |
| try { |
| final String canonicalPath = path.getCanonicalPath(); |
| final String canonicalExternal = Environment.getExternalStorageDirectory() |
| .getCanonicalPath(); |
| |
| if (canonicalPath.startsWith(canonicalExternal)) { |
| return Environment.getExternalStorageState(); |
| } |
| } catch (IOException e) { |
| Log.w(TAG, "Failed to resolve canonical path: " + e); |
| } |
| |
| return MEDIA_UNKNOWN; |
| } |
| |
| private EnvironmentCompat() {} |
| } |