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/*
* Copyright (C) 2012 The CyanogenMod 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 com.cyanogenmod.filemanager.util;
import android.content.Context;
import android.os.Environment;
import android.os.storage.StorageManager;
import android.os.storage.StorageVolume;
import com.cyanogenmod.filemanager.FileManagerApplication;
import com.cyanogenmod.filemanager.R;
import java.io.File;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.Locale;
/**
* A helper class with useful methods for deal with storages.
*/
public final class StorageHelper {
private static StorageVolume[] sStorageVolumes;
/**
* Method that returns the storage volumes defined in the system. This method uses
* reflection to retrieve the method because CM10 has a {@link Context}
* as first parameter, that AOSP hasn't.
*
* @param ctx The current context
* @param reload If true, re-query the volumes and do not return the already cached list.
* @return StorageVolume[] The storage volumes defined in the system
*/
@SuppressWarnings("boxing")
public static synchronized StorageVolume[] getStorageVolumes(Context ctx, boolean reload) {
if (sStorageVolumes == null || reload) {
//IMP!! Android SDK doesn't have a "getVolumeList" but is supported by CM10.
//Use reflect to get this value (if possible)
try {
StorageManager sm = (StorageManager) ctx.getSystemService(Context.STORAGE_SERVICE);
Method method = sm.getClass().getMethod("getVolumeList"); //$NON-NLS-1$
sStorageVolumes = (StorageVolume[])method.invoke(sm);
} catch (Exception ex) {
//Ignore. Android SDK StorageManager class doesn't have this method
//Use default android information from environment
try {
File externalStorage = Environment.getExternalStorageDirectory();
String path = externalStorage.getCanonicalPath();
String description = null;
if (path.toLowerCase(Locale.ROOT).indexOf("usb") != -1) { //$NON-NLS-1$
description = ctx.getString(R.string.usb_storage);
} else {
description = ctx.getString(R.string.external_storage);
}
// Android SDK has a different constructor for StorageVolume. In CM10 the
// description is a resource id. Create the object by reflection
Constructor<StorageVolume> constructor =
StorageVolume.class.
getConstructor(
String.class,
String.class,
boolean.class,
boolean.class,
int.class,
boolean.class,
long.class);
StorageVolume sv =
constructor.newInstance(path, description, false, false, 0, false, 0);
sStorageVolumes = new StorageVolume[]{sv};
} catch (Exception ex2) {
/**NON BLOCK**/
}
}
if (sStorageVolumes == null) {
sStorageVolumes = new StorageVolume[]{};
}
}
return sStorageVolumes;
}
/**
* Method that returns the storage volume description. This method uses
* reflection to retrieve the description because CM10 has a {@link Context}
* as first parameter, that AOSP hasn't.
*
* @param ctx The current context
* @param volume The storage volume
* @return String The description of the storage volume
*/
public static String getStorageVolumeDescription(Context ctx, StorageVolume volume) {
try {
Method method = volume.getClass().getMethod(
"getDescription", //$NON-NLS-1$
new Class[]{Context.class});
if (method == null) {
// AOSP
method = volume.getClass().getMethod("getDescription"); //$NON-NLS-1$
return (String)method.invoke(volume);
}
// CM10
return (String)method.invoke(volume, ctx);
} catch (Throwable _throw) {
// Returns the volume storage path
return volume.getPath();
}
}
/**
* Method that returns if the path is in a volume storage
*
* @param path The path
* @return boolean If the path is in a volume storage
*/
public static boolean isPathInStorageVolume(String path) {
String fso = FileHelper.getAbsPath(path);
StorageVolume[] volumes =
getStorageVolumes(FileManagerApplication.getInstance().getApplicationContext(),
false);
int cc = volumes.length;
for (int i = 0; i < cc; i++) {
StorageVolume vol = volumes[i];
if (fso.startsWith(vol.getPath())) {
return true;
}
}
return false;
}
/**
* Method that returns if the path is a storage volume
*
* @param path The path
* @return boolean If the path is a storage volume
*/
public static boolean isStorageVolume(String path) {
StorageVolume[] volumes =
getStorageVolumes(FileManagerApplication.getInstance().getApplicationContext(),
false);
int cc = volumes.length;
for (int i = 0; i < cc; i++) {
StorageVolume vol = volumes[i];
String p = new File(path).getAbsolutePath();
String v = new File(vol.getPath()).getAbsolutePath();
if (p.compareTo(v) == 0) {
return true;
}
}
return false;
}
/**
* Method that return the chrooted path of an absolute path. xe: /storage/sdcard0 --> sdcard0.
*
* @param path The path
* @return String The chrooted path
*/
public static String getChrootedPath(String path) {
StorageVolume[] volumes =
getStorageVolumes(FileManagerApplication.getInstance().getApplicationContext(),
false);
int cc = volumes.length;
for (int i = 0; i < cc; i++) {
StorageVolume vol = volumes[i];
File p = new File(path);
File v = new File(vol.getPath());
if (p.getAbsolutePath().startsWith(v.getAbsolutePath())) {
return v.getName() + path.substring(v.getAbsolutePath().length());
}
}
return null;
}
}
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