blob: ebb1ae13afde556a74b059ad10cf80f21c173fa7 [file] [log] [blame]
/*
* Copyright (C) 2007 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;
import android.app.Activity;
import android.app.LoaderManager;
import android.content.ActivityNotFoundException;
import android.content.ContentResolver;
import android.content.Intent;
import android.content.Loader;
import android.net.Uri;
import android.os.Bundle;
import android.os.SystemProperties;
import android.support.annotation.VisibleForTesting;
import android.support.v4.content.FileProvider;
import android.text.TextUtils;
import android.util.Log;
import android.widget.Toast;
import com.android.settings.users.RestrictedProfileSettings;
import com.android.settingslib.license.LicenseHtmlLoader;
import java.io.File;
/**
* The "dialog" that shows from "License" in the Settings app.
*/
public class SettingsLicenseActivity extends Activity implements
LoaderManager.LoaderCallbacks<File> {
private static final String TAG = "SettingsLicenseActivity";
private static final String DEFAULT_LICENSE_PATH = "/system/etc/NOTICE.html.gz";
private static final String PROPERTY_LICENSE_PATH = "ro.config.license_path";
private static final int LOADER_ID_LICENSE_HTML_LOADER = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final String licenseHtmlPath =
SystemProperties.get(PROPERTY_LICENSE_PATH, DEFAULT_LICENSE_PATH);
if (isFilePathValid(licenseHtmlPath)) {
showSelectedFile(licenseHtmlPath);
} else {
showHtmlFromDefaultXmlFiles();
}
}
@Override
public Loader<File> onCreateLoader(int id, Bundle args) {
return new LicenseHtmlLoader(this);
}
@Override
public void onLoadFinished(Loader<File> loader, File generatedHtmlFile) {
showGeneratedHtmlFile(generatedHtmlFile);
}
@Override
public void onLoaderReset(Loader<File> loader) {
}
private void showHtmlFromDefaultXmlFiles() {
getLoaderManager().initLoader(LOADER_ID_LICENSE_HTML_LOADER, Bundle.EMPTY, this);
}
@VisibleForTesting
Uri getUriFromGeneratedHtmlFile(File generatedHtmlFile) {
return FileProvider.getUriForFile(this, RestrictedProfileSettings.FILE_PROVIDER_AUTHORITY,
generatedHtmlFile);
}
private void showGeneratedHtmlFile(File generatedHtmlFile) {
if (generatedHtmlFile != null) {
showHtmlFromUri(getUriFromGeneratedHtmlFile(generatedHtmlFile));
} else {
Log.e(TAG, "Failed to generate.");
showErrorAndFinish();
}
}
private void showSelectedFile(final String path) {
if (TextUtils.isEmpty(path)) {
Log.e(TAG, "The system property for the license file is empty");
showErrorAndFinish();
return;
}
final File file = new File(path);
if (!isFileValid(file)) {
Log.e(TAG, "License file " + path + " does not exist");
showErrorAndFinish();
return;
}
showHtmlFromUri(Uri.fromFile(file));
}
private void showHtmlFromUri(Uri uri) {
// Kick off external viewer due to WebView security restrictions; we
// carefully point it at HTMLViewer, since it offers to decompress
// before viewing.
final Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "text/html");
intent.putExtra(Intent.EXTRA_TITLE, getString(R.string.settings_license_activity_title));
if (ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) {
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setPackage("com.android.htmlviewer");
try {
startActivity(intent);
finish();
} catch (ActivityNotFoundException e) {
Log.e(TAG, "Failed to find viewer", e);
showErrorAndFinish();
}
}
private void showErrorAndFinish() {
Toast.makeText(this, R.string.settings_license_activity_unavailable, Toast.LENGTH_LONG)
.show();
finish();
}
private boolean isFilePathValid(final String path) {
return !TextUtils.isEmpty(path) && isFileValid(new File(path));
}
@VisibleForTesting
boolean isFileValid(final File file) {
return file.exists() && file.length() != 0;
}
}