128 lines
4.1 KiB
Java
128 lines
4.1 KiB
Java
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings;
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import android.content.ActivityNotFoundException;
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import android.content.ContentResolver;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.Bundle;
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import android.util.Log;
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import android.widget.Toast;
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import androidx.annotation.VisibleForTesting;
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import androidx.core.content.FileProvider;
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import androidx.fragment.app.FragmentActivity;
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import androidx.loader.app.LoaderManager;
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import androidx.loader.content.Loader;
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import com.android.settingslib.license.LicenseHtmlLoaderCompat;
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import java.io.File;
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/**
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* The "dialog" that shows from "License" in the Settings app.
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*/
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public class SettingsLicenseActivity extends FragmentActivity implements
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LoaderManager.LoaderCallbacks<File> {
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private static final String TAG = "SettingsLicenseActivity";
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private static final String LICENSE_PATH = "/system/etc/NOTICE.html.gz";
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private static final int LOADER_ID_LICENSE_HTML_LOADER = 0;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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File file = new File(LICENSE_PATH);
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if (isFileValid(file)) {
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showHtmlFromUri(Uri.fromFile(file));
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} else {
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showHtmlFromDefaultXmlFiles();
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}
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}
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@Override
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public Loader<File> onCreateLoader(int id, Bundle args) {
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return new LicenseHtmlLoaderCompat(this);
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}
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@Override
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public void onLoadFinished(Loader<File> loader, File generatedHtmlFile) {
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showGeneratedHtmlFile(generatedHtmlFile);
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}
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@Override
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public void onLoaderReset(Loader<File> loader) {
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}
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private void showHtmlFromDefaultXmlFiles() {
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getSupportLoaderManager().initLoader(LOADER_ID_LICENSE_HTML_LOADER, Bundle.EMPTY, this);
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}
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@VisibleForTesting
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Uri getUriFromGeneratedHtmlFile(File generatedHtmlFile) {
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return FileProvider.getUriForFile(this, Utils.FILE_PROVIDER_AUTHORITY,
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generatedHtmlFile);
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}
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private void showGeneratedHtmlFile(File generatedHtmlFile) {
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if (generatedHtmlFile != null) {
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showHtmlFromUri(getUriFromGeneratedHtmlFile(generatedHtmlFile));
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} else {
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Log.e(TAG, "Failed to generate.");
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showErrorAndFinish();
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}
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}
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private void showHtmlFromUri(Uri uri) {
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// Kick off external viewer due to WebView security restrictions; we
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// carefully point it at HTMLViewer, since it offers to decompress
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// before viewing.
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final Intent intent = new Intent(Intent.ACTION_VIEW);
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intent.setDataAndType(uri, "text/html");
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intent.putExtra(Intent.EXTRA_TITLE, getString(R.string.settings_license_activity_title));
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if (ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) {
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intent.addFlags(
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Intent.FLAG_GRANT_READ_URI_PERMISSION
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| Intent.FLAG_GRANT_PREFIX_URI_PERMISSION);
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}
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intent.addCategory(Intent.CATEGORY_DEFAULT);
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intent.setPackage("com.android.htmlviewer");
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try {
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startActivity(intent);
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finish();
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} catch (ActivityNotFoundException e) {
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Log.e(TAG, "Failed to find viewer", e);
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showErrorAndFinish();
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}
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}
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private void showErrorAndFinish() {
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Toast.makeText(this, R.string.settings_license_activity_unavailable, Toast.LENGTH_LONG)
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.show();
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finish();
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}
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@VisibleForTesting
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boolean isFileValid(final File file) {
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return file.exists() && file.length() != 0;
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}
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}
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