app_Settings/src/com/android/settings/applications/appinfo/AppLocaleDetails.java

/*
 * Copyright (C) 2021 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.applications.appinfo;

import static com.android.settings.widget.EntityHeaderController.ActionType;

import android.app.Activity;
import android.app.LocaleConfig;
import android.app.LocaleManager;
import android.app.settings.SettingsEnums;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.InstallSourceInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.Bundle;
import android.os.LocaleList;
import android.os.UserHandle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.preference.Preference;

import com.android.settings.R;
import com.android.settings.SettingsPreferenceFragment;
import com.android.settings.Utils;
import com.android.settings.applications.AppInfoBase;
import com.android.settings.widget.EntityHeaderController;
import com.android.settingslib.applications.AppUtils;
import com.android.settingslib.applications.ApplicationsState.AppEntry;
import com.android.settingslib.widget.BannerMessagePreference;
import com.android.settingslib.widget.BannerMessagePreference.AttentionLevel;
import com.android.settingslib.widget.LayoutPreference;

import java.util.Locale;

/**
 * TODO(b/223503670): Implement the unittest.
 * A fragment to show the current app locale info.
 */
public class AppLocaleDetails extends SettingsPreferenceFragment {
    private static final String TAG = "AppLocaleDetails";

    private static final String KEY_APP_DESCRIPTION = "app_locale_description";
    private static final String KEY_WARNINGS = "key_warnings";

    private boolean mCreated = false;
    private String mPackageName;
    private LayoutPreference mPrefOfDescription;
    private ApplicationInfo mApplicationInfo;

    /**
     * Create a instance of AppLocaleDetails.
     * @param packageName Indicates which application need to show the locale picker.
     */
    public static AppLocaleDetails newInstance(String packageName) {
        AppLocaleDetails appLocaleDetails = new AppLocaleDetails();
        Bundle bundle = new Bundle();
        bundle.putString(AppInfoBase.ARG_PACKAGE_NAME, packageName);
        appLocaleDetails.setArguments(bundle);
        return appLocaleDetails;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Bundle bundle = getArguments();
        mPackageName = bundle.getString(AppInfoBase.ARG_PACKAGE_NAME, "");
        if (mPackageName.isEmpty()) {
            Log.d(TAG, "No package name.");
            finish();
        }
        addPreferencesFromResource(R.xml.app_locale_details);
        mPrefOfDescription = getPreferenceScreen().findPreference(KEY_APP_DESCRIPTION);
        mApplicationInfo = getApplicationInfo(mPackageName, getContext().getUserId());
        setWarningMessage();
    }

    // Override here so we don't have an empty screen
    @Override
    public View onCreateView(LayoutInflater inflater,
            ViewGroup container,
            Bundle savedInstanceState) {
        // if we don't have a package, show a page saying this is unsupported
        if (mPackageName.isEmpty()) {
            return inflater.inflate(R.layout.manage_applications_apps_unsupported, null);
        }
        return super.onCreateView(inflater, container, savedInstanceState);
    }

    @Override
    public void onResume() {
        super.onResume();
        refreshUi();
    }

    private void refreshUi() {
        setWarningMessage();
        setDescription();
    }

    @Override
    public int getMetricsCategory() {
        return SettingsEnums.APPS_LOCALE_LIST;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        if (mCreated) {
            Log.w(TAG, "onActivityCreated: ignoring duplicate call");
            return;
        }
        mCreated = true;
        if (mPackageName == null) {
            return;
        }
        // Creates a head icon button of app on this page.
        final Activity activity = getActivity();
        final Preference pref = EntityHeaderController
                .newInstance(activity, this, null /* header */)
                .setRecyclerView(getListView(), getSettingsLifecycle())
                .setIcon(Utils.getBadgedIcon(getContext(), mApplicationInfo))
                .setLabel(mApplicationInfo.loadLabel(getContext().getPackageManager()))
                .setIsInstantApp(AppUtils.isInstant(mApplicationInfo))
                .setPackageName(mPackageName)
                .setUid(mApplicationInfo.uid)
                .setHasAppInfoLink(true)
                .setButtonActions(ActionType.ACTION_NONE, ActionType.ACTION_NONE)
                .setOrder(10)
                .done(activity, getPrefContext());
        getPreferenceScreen().addPreference(pref);
    }

    private void setWarningMessage() {
        BannerMessagePreference warningPreference =
                (BannerMessagePreference) getPreferenceScreen().findPreference(KEY_WARNINGS);
        try {
            InstallSourceInfo installSourceInfo =
                    getContext().getPackageManager().getInstallSourceInfo(mPackageName);
            if (mApplicationInfo.isSystemApp()
                    && installSourceInfo.getInstallingPackageName() == null) {
                warningPreference.setAttentionLevel(AttentionLevel.MEDIUM);
                warningPreference.setPositiveButtonOnClickListener(mBannerButtonClickListener);
                warningPreference.setPositiveButtonText(R.string.warnings_button_update);
                warningPreference.setVisible(true);
            } else {
                warningPreference.setVisible(false);
            }
        } catch (NameNotFoundException e) {
            Log.e(TAG, "Exception while retrieving the package installer of " + mPackageName, e);
        }
    }

    private void setDescription() {
        int res = getAppDescription();
        if (res != -1) {
            mPrefOfDescription.setVisible(true);
            TextView description = (TextView) mPrefOfDescription.findViewById(R.id.description);
            description.setText(getContext().getString(res));
        }
    }

    private OnClickListener mBannerButtonClickListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            startActivity(getAppSearchIntent(mPackageName));
        }
    };

    private static Intent getAppSearchIntent(String pkg) {
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setData(Uri.parse("market://details?id=" + pkg));
        return intent;
    }

    private ApplicationInfo getApplicationInfo(String packageName, int userId) {
        ApplicationInfo applicationInfo;
        try {
            applicationInfo = getContext().getPackageManager()
                    .getApplicationInfoAsUser(packageName, /* flags= */ 0, userId);
            return applicationInfo;
        } catch (PackageManager.NameNotFoundException e) {
            Log.w(TAG, "Application info not found for: " + packageName);
            return null;
        }
    }

    private int getAppDescription() {
        LocaleList packageLocaleList = getPackageLocales();
        String[] assetLocaleList = getAssetLocales();
        // TODO add apended url string, "Learn more", to these both sentenses.
        if ((packageLocaleList != null && packageLocaleList.isEmpty())
                || (packageLocaleList == null && assetLocaleList.length == 0)) {
            return R.string.desc_no_available_supported_locale;
        }
        return -1;
    }

    private String[] getAssetLocales() {
        try {
            PackageManager packageManager = getContext().getPackageManager();
            String[] locales = packageManager.getResourcesForApplication(
                    packageManager.getPackageInfo(mPackageName, PackageManager.MATCH_ALL)
                            .applicationInfo).getAssets().getNonSystemLocales();
            if (locales == null) {
                Log.i(TAG, "[" + mPackageName + "] locales are null.");
            }
            if (locales.length <= 0) {
                Log.i(TAG, "[" + mPackageName + "] locales length is 0.");
                return new String[0];
            }
            String locale = locales[0];
            Log.i(TAG, "First asset locale - [" + mPackageName + "] " + locale);
            return locales;
        } catch (PackageManager.NameNotFoundException e) {
            Log.w(TAG, "Can not found the package name : " + mPackageName + " / " + e);
        }
        return new String[0];
    }

    private LocaleList getPackageLocales() {
        try {
            LocaleConfig localeConfig =
                    new LocaleConfig(getContext().createPackageContext(mPackageName, 0));
            if (localeConfig.getStatus() == LocaleConfig.STATUS_SUCCESS) {
                return localeConfig.getSupportedLocales();
            }
        } catch (PackageManager.NameNotFoundException e) {
            Log.w(TAG, "Can not found the package name : " + mPackageName + " / " + e);
        }
        return null;
    }

    /** Gets per app's default locale */
    public static Locale getAppDefaultLocale(Context context, String packageName) {
        LocaleManager localeManager = context.getSystemService(LocaleManager.class);
        try {
            LocaleList localeList = (localeManager == null)
                    ? null : localeManager.getApplicationLocales(packageName);
            return localeList == null ? null : localeList.get(0);
        } catch (IllegalArgumentException e) {
            Log.w(TAG, "package name : " + packageName + " is not correct. " + e);
        }
        return null;
    }

    /**
     * TODO (b209962418) Do a performance test to low end device.
     * @return Return the summary to show the current app's language.
     */
    public static CharSequence getSummary(Context context, AppEntry entry) {
        final UserHandle userHandle = UserHandle.getUserHandleForUid(entry.info.uid);
        final Context contextAsUser = context.createContextAsUser(userHandle, 0);
        Locale appLocale = getAppDefaultLocale(contextAsUser, entry.info.packageName);
        if (appLocale == null) {
            return context.getString(R.string.preference_of_system_locale_summary);
        } else {
            return appLocale.getDisplayName(appLocale);
        }
    }
}