/*
* Copyright (C) 2008 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 com.android.settings.deviceinfo;
import android.app.ActivityManager;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.DialogInterface.OnCancelListener;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.res.Resources;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.RemoteException;
import android.os.Environment;
import android.os.storage.IMountService;
import android.os.ServiceManager;
import android.os.StatFs;
import android.os.storage.StorageManager;
import android.os.storage.StorageEventListener;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceScreen;
import android.text.format.Formatter;
import android.util.Log;
import android.widget.Toast;
import com.android.settings.R;
import java.io.File;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class Memory extends PreferenceActivity implements OnCancelListener {
private static final String TAG = "Memory";
private static final boolean localLOGV = false;
private static final String MEMORY_SD_SIZE = "memory_sd_size";
private static final String MEMORY_SD_AVAIL = "memory_sd_avail";
private static final String MEMORY_SD_MOUNT_TOGGLE = "memory_sd_mount_toggle";
private static final String MEMORY_SD_FORMAT = "memory_sd_format";
private static final int DLG_CONFIRM_UNMOUNT = 1;
private static final int DLG_ERROR_UNMOUNT = 2;
private Resources mRes;
private Preference mSdSize;
private Preference mSdAvail;
private Preference mSdMountToggle;
private Preference mSdFormat;
// Access using getMountService()
private IMountService mMountService = null;
private StorageManager mStorageManager = null;
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
if (mStorageManager == null) {
mStorageManager = (StorageManager) getSystemService(Context.STORAGE_SERVICE);
mStorageManager.registerListener(mStorageListener);
}
addPreferencesFromResource(R.xml.device_info_memory);
mRes = getResources();
mSdSize = findPreference(MEMORY_SD_SIZE);
mSdAvail = findPreference(MEMORY_SD_AVAIL);
mSdMountToggle = findPreference(MEMORY_SD_MOUNT_TOGGLE);
mSdFormat = findPreference(MEMORY_SD_FORMAT);
}
@Override
protected void onResume() {
super.onResume();
IntentFilter intentFilter = new IntentFilter(Intent.ACTION_MEDIA_SCANNER_STARTED);
intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);
intentFilter.addDataScheme("file");
registerReceiver(mReceiver, intentFilter);
updateMemoryStatus();
}
StorageEventListener mStorageListener = new StorageEventListener() {
@Override
public void onStorageStateChanged(String path, String oldState, String newState) {
Log.i(TAG, "Received storage state changed notification that " +
path + " changed state from " + oldState +
" to " + newState);
updateMemoryStatus();
}
};
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mReceiver);
}
@Override
protected void onDestroy() {
if (mStorageManager != null && mStorageListener != null) {
mStorageManager.unregisterListener(mStorageListener);
}
super.onDestroy();
}
private synchronized IMountService getMountService() {
if (mMountService == null) {
IBinder service = ServiceManager.getService("mount");
if (service != null) {
mMountService = IMountService.Stub.asInterface(service);
} else {
Log.e(TAG, "Can't get mount service");
}
}
return mMountService;
}
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
if (preference == mSdMountToggle) {
String status = Environment.getExternalStorageState();
if (status.equals(Environment.MEDIA_MOUNTED)) {
unmount();
} else {
mount();
}
return true;
} else if (preference == mSdFormat) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setClass(this, com.android.settings.MediaFormat.class);
startActivity(intent);
return true;
}
return false;
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
updateMemoryStatus();
}
};
@Override
public Dialog onCreateDialog(int id, Bundle args) {
switch (id) {
case DLG_CONFIRM_UNMOUNT:
return new AlertDialog.Builder(this)
.setTitle(R.string.dlg_confirm_unmount_title)
.setPositiveButton(R.string.dlg_ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
doUnmount(true);
}})
.setNegativeButton(R.string.cancel, null)
.setMessage(R.string.dlg_confirm_unmount_text)
.setOnCancelListener(this)
.create();
case DLG_ERROR_UNMOUNT:
return new AlertDialog.Builder(this )
.setTitle(R.string.dlg_error_unmount_title)
.setNeutralButton(R.string.dlg_ok, null)
.setMessage(R.string.dlg_error_unmount_text)
.setOnCancelListener(this)
.create();
}
return null;
}
private void doUnmount(boolean force) {
// Present a toast here
Toast.makeText(this, R.string.unmount_inform_text, Toast.LENGTH_SHORT).show();
IMountService mountService = getMountService();
String extStoragePath = Environment.getExternalStorageDirectory().toString();
try {
mSdMountToggle.setEnabled(false);
mSdMountToggle.setTitle(mRes.getString(R.string.sd_ejecting_title));
mSdMountToggle.setSummary(mRes.getString(R.string.sd_ejecting_summary));
mountService.unmountVolume(extStoragePath, force);
} catch (RemoteException e) {
// Informative dialog to user that
// unmount failed.
showDialogInner(DLG_ERROR_UNMOUNT);
}
}
private void showDialogInner(int id) {
removeDialog(id);
showDialog(id);
}
private boolean hasAppsAccessingStorage() throws RemoteException {
String extStoragePath = Environment.getExternalStorageDirectory().toString();
IMountService mountService = getMountService();
boolean showPidDialog = false;
int stUsers[] = mountService.getStorageUsers(extStoragePath);
if (stUsers != null && stUsers.length > 0) {
return true;
}
ActivityManager am = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
List<ApplicationInfo> list = am.getRunningExternalApplications();
if (list != null && list.size() > 0) {
return true;
}
return false;
}
private void unmount() {
// Check if external media is in use.
try {
if (hasAppsAccessingStorage()) {
if (localLOGV) Log.i(TAG, "Do have storage users accessing media");
// Present dialog to user
showDialogInner(DLG_CONFIRM_UNMOUNT);
} else {
doUnmount(true);
}
} catch (RemoteException e) {
// Very unlikely. But present an error dialog anyway
Log.e(TAG, "Is MountService running?");
showDialogInner(DLG_ERROR_UNMOUNT);
}
}
private void mount() {
IMountService mountService = getMountService();
try {
if (mountService != null) {
mountService.mountVolume(Environment.getExternalStorageDirectory().toString());
} else {
Log.e(TAG, "Mount service is null, can't mount");
}
} catch (RemoteException ex) {
}
}
private void updateMemoryStatus() {
String status = Environment.getExternalStorageState();
String readOnly = "";
if (status.equals(Environment.MEDIA_MOUNTED_READ_ONLY)) {
status = Environment.MEDIA_MOUNTED;
readOnly = mRes.getString(R.string.read_only);
}
mSdFormat.setEnabled(false);
if (status.equals(Environment.MEDIA_MOUNTED)) {
try {
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long totalBlocks = stat.getBlockCount();
long availableBlocks = stat.getAvailableBlocks();
mSdSize.setSummary(formatSize(totalBlocks * blockSize));
mSdAvail.setSummary(formatSize(availableBlocks * blockSize) + readOnly);
mSdMountToggle.setEnabled(true);
mSdMountToggle.setTitle(mRes.getString(R.string.sd_eject));
mSdMountToggle.setSummary(mRes.getString(R.string.sd_eject_summary));
} catch (IllegalArgumentException e) {
// this can occur if the SD card is removed, but we haven't received the
// ACTION_MEDIA_REMOVED Intent yet.
status = Environment.MEDIA_REMOVED;
}
} else {
mSdSize.setSummary(mRes.getString(R.string.sd_unavailable));
mSdAvail.setSummary(mRes.getString(R.string.sd_unavailable));
if (status.equals(Environment.MEDIA_UNMOUNTED) ||
status.equals(Environment.MEDIA_NOFS) ||
status.equals(Environment.MEDIA_UNMOUNTABLE) ) {
mSdFormat.setEnabled(true);
mSdMountToggle.setEnabled(true);
mSdMountToggle.setTitle(mRes.getString(R.string.sd_mount));
mSdMountToggle.setSummary(mRes.getString(R.string.sd_mount_summary));
} else {
mSdMountToggle.setEnabled(false);
mSdMountToggle.setTitle(mRes.getString(R.string.sd_mount));
mSdMountToggle.setSummary(mRes.getString(R.string.sd_insert_summary));
}
}
File path = Environment.getDataDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
findPreference("memory_internal_avail").setSummary(formatSize(availableBlocks * blockSize));
}
private String formatSize(long size) {
return Formatter.formatFileSize(this, size);
}
public void onCancel(DialogInterface dialog) {
finish();
}
}