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/*
* Copyright (C) 2008 The Android Open Source Project
* Copyright (C) 2015 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.android.settings;
import android.app.Activity;
import android.app.Fragment;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.UserInfo;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.os.Environment;
import android.os.Process;
import android.os.SystemProperties;
import android.os.UserHandle;
import android.os.UserManager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import com.android.internal.logging.MetricsLogger;
import java.util.List;
/**
* Confirm and execute a reset of the device to a clean "just out of the box"
* state. Multiple confirmations are required: first, a general "are you sure
* you want to do this?" prompt, followed by a keyguard pattern trace if the user
* has defined one, followed by a final strongly-worded "THIS WILL ERASE EVERYTHING
* ON THE PHONE" prompt. If at any time the phone is allowed to go to sleep, is
* locked, et cetera, then the confirmation sequence is abandoned.
*
* This is the initial screen.
*/
public class MasterClear extends InstrumentedFragment {
private static final String TAG = "MasterClear";
private static final int KEYGUARD_REQUEST = 55;
//must match MasterClearReceiver.java extra
public static final String EXTRA_WIPE_MEDIA = "wipe_media";
private View mContentView;
private Button mInitiateButton;
private View mExternalStorageContainer;
private View mInternalStorageContainer;
private CheckBox mInternalStorage;
private CheckBox mExternalStorage;
/**
* Keyguard validation is run using the standard {@link ConfirmLockPattern}
* component as a subactivity
* @param request the request code to be returned once confirmation finishes
* @return true if confirmation launched
*/
private boolean runKeyguardConfirmation(int request) {
Resources res = getActivity().getResources();
return new ChooseLockSettingsHelper(getActivity(), this).launchConfirmationActivity(
request, res.getText(R.string.master_clear_title));
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode != KEYGUARD_REQUEST) {
return;
}
// If the user entered a valid keyguard trace, present the final
// confirmation prompt; otherwise, go back to the initial state.
if (resultCode == Activity.RESULT_OK) {
showFinalConfirmation();
} else {
establishInitialState();
}
}
private void showFinalConfirmation() {
MasterClearConfirm.createInstance(mInternalStorage.isChecked(),
mExternalStorage.isChecked()) .show(getFragmentManager(),
MasterClearConfirm.class.getSimpleName());
}
/**
* If the user clicks to begin the reset sequence, we next require a
* keyguard confirmation if the user has currently enabled one. If there
* is no keyguard available, we simply go to the final confirmation prompt.
*/
private final Button.OnClickListener mInitiateListener = new Button.OnClickListener() {
public void onClick(View v) {
if (!runKeyguardConfirmation(KEYGUARD_REQUEST)) {
showFinalConfirmation();
}
}
};
/**
* In its initial state, the activity presents a button for the user to
* click in order to initiate a confirmation sequence. This method is
* called from various other points in the code to reset the activity to
* this base state.
*
* <p>Reinflating views from resources is expensive and prevents us from
* caching widget pointers, so we use a single-inflate pattern: we lazy-
* inflate each view, caching all of the widget pointers we'll need at the
* time, then simply reuse the inflated views directly whenever we need
* to change contents.
*/
private void establishInitialState() {
mInitiateButton = (Button) mContentView.findViewById(R.id.initiate_master_clear);
mInitiateButton.setOnClickListener(mInitiateListener);
mInternalStorage = (CheckBox) mContentView.findViewById(R.id.erase_internal);
mInternalStorageContainer = mContentView.findViewById(R.id.erase_internal_container);
mExternalStorageContainer = mContentView.findViewById(R.id.erase_external_container);
mExternalStorage = (CheckBox) mContentView.findViewById(R.id.erase_external);
boolean hasExternalStorage = false;
/**
* Here we do some logic to ensure the proper states are initialized.
* - hide internal memory section if device doesn't support it
* - force internal memory to be erased if the device is encrypted
* - show and hide the sd card section if the device supports this (and its inserted)
* TODO: mutli SD card support: no devices we support have this, but that might change
*/
if (Environment.isExternalStorageEmulated()) {
// we may have to force wipe internal storage due to encryption.
mInternalStorageContainer.setEnabled(!isExtStorageEncrypted()
&& !Environment.isExternalStorageRemovable());
mInternalStorageContainer.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mInternalStorage.toggle();
}
});
if (!mInternalStorageContainer.isEnabled()) {
// force internal wipe
mInternalStorage.setChecked(true);
TextView internalSummaryText = (TextView) mContentView.findViewById(
R.id.erase_storage_checkbox_description);
internalSummaryText.setText(
R.string.factory_reset_erase_stored_content_summary_forced);
}
} else {
// there's no storage emulation; hide internal storage
mInternalStorageContainer.setVisibility(View.GONE);
// primary storage can be removed. but does it exist?
}
hasExternalStorage = Environment.isExternalStorageRemovable()
&& Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
mExternalStorageContainer.setVisibility(hasExternalStorage ? View.VISIBLE : View.GONE);
mExternalStorageContainer.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mExternalStorage.toggle();
}
});
StringBuffer contentDescription = new StringBuffer();
getContentDescription(mInternalStorageContainer, contentDescription);
mInternalStorageContainer.setContentDescription(contentDescription);
}
private void getContentDescription(View v, StringBuffer description) {
if (v instanceof ViewGroup) {
ViewGroup vGroup = (ViewGroup) v;
for (int i = 0; i < vGroup.getChildCount(); i++) {
View nextChild = vGroup.getChildAt(i);
getContentDescription(nextChild, description);
}
} else if (v instanceof TextView) {
TextView vText = (TextView) v;
description.append(vText.getText());
description.append(","); // Allow Talkback to pause between sections.
}
}
private boolean isExtStorageEncrypted() {
String state = SystemProperties.get("vold.decrypt");
return !"".equals(state);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (!Process.myUserHandle().isOwner()
|| UserManager.get(getActivity()).hasUserRestriction(
UserManager.DISALLOW_FACTORY_RESET)) {
return inflater.inflate(R.layout.master_clear_disallowed_screen, null);
}
mContentView = inflater.inflate(R.layout.master_clear_cm, null);
establishInitialState();
return mContentView;
}
@Override
protected int getMetricsCategory() {
return MetricsLogger.MASTER_CLEAR;
}
}
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