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/*
* 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.content.ActivityNotFoundException;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import androidx.annotation.VisibleForTesting;
import androidx.core.content.FileProvider;
import androidx.fragment.app.FragmentActivity;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.Loader;
import com.android.settingslib.license.LicenseHtmlLoaderCompat;
import java.io.File;
/**
* The "dialog" that shows from "License" in the Settings app.
*/
public class SettingsLicenseActivity extends FragmentActivity implements
LoaderManager.LoaderCallbacks<File> {
private static final String TAG = "SettingsLicenseActivity";
private static final String LICENSE_PATH = "/system/etc/NOTICE.html.gz";
private static final int LOADER_ID_LICENSE_HTML_LOADER = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
File file = new File(LICENSE_PATH);
if (isFileValid(file)) {
showHtmlFromUri(Uri.fromFile(file));
} else {
showHtmlFromDefaultXmlFiles();
}
}
@Override
public Loader<File> onCreateLoader(int id, Bundle args) {
return new LicenseHtmlLoaderCompat(this);
}
@Override
public void onLoadFinished(Loader<File> loader, File generatedHtmlFile) {
showGeneratedHtmlFile(generatedHtmlFile);
}
@Override
public void onLoaderReset(Loader<File> loader) {
}
private void showHtmlFromDefaultXmlFiles() {
getSupportLoaderManager().initLoader(LOADER_ID_LICENSE_HTML_LOADER, Bundle.EMPTY, this);
}
@VisibleForTesting
Uri getUriFromGeneratedHtmlFile(File generatedHtmlFile) {
return FileProvider.getUriForFile(this, Utils.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 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.FLAG_GRANT_PREFIX_URI_PERMISSION);
}
intent.addCategory(Intent.CATEGORY_DEFAULT);
ComponentName componentName = new ComponentName(
"com.android.htmlviewer", "com.android.htmlviewer.HTMLViewerActivity");
intent.setComponent(componentName);
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();
}
@VisibleForTesting
boolean isFileValid(final File file) {
return file.exists() && file.length() != 0;
}
}
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