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/*
* Copyright (C) 2017 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.dialer.configprovider;
import android.app.IntentService;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.support.annotation.Nullable;
import com.android.dialer.common.Assert;
import com.android.dialer.common.LogUtil;
import com.android.dialer.storage.StorageComponent;
import com.android.dialer.storage.Unencrypted;
import com.android.dialer.strictmode.StrictModeUtils;
import javax.inject.Inject;
/**
* {@link ConfigProvider} which uses a shared preferences file.
*
* <p>Config flags can be written using adb (with root access), for example:
*
* <pre>
* adb root
* adb shell am startservice -n \
* 'com.android.dialer/.configprovider.SharedPrefConfigProvider\$Service' \
* --ez boolean_flag_name flag_value
* </pre>
*
* <p>(For longs use --el and for strings use --es.)
*
* <p>Flags can be viewed with:
*
* <pre>
* adb shell cat \
* /data/user_de/0/com.android.dialer/shared_prefs/com.android.dialer_preferences.xml
* </pre>
*/
public class SharedPrefConfigProvider implements ConfigProvider {
private static final String PREF_PREFIX = "config_provider_prefs_";
private final SharedPreferences sharedPreferences;
@Inject
SharedPrefConfigProvider(@Unencrypted SharedPreferences sharedPreferences) {
this.sharedPreferences = sharedPreferences;
}
/** Service to write values into {@link SharedPrefConfigProvider} using adb. */
public static class Service extends IntentService {
public Service() {
super("SharedPrefConfigProvider.Service");
}
@Override
protected void onHandleIntent(@Nullable Intent intent) {
if (intent == null || intent.getExtras() == null || intent.getExtras().size() != 1) {
LogUtil.w("SharedPrefConfigProvider.Service.onHandleIntent", "must set exactly one extra");
return;
}
String key = intent.getExtras().keySet().iterator().next();
Object value = intent.getExtras().get(key);
put(key, value);
}
private void put(String key, Object value) {
Editor editor = getSharedPrefs(getApplicationContext()).edit();
String prefixedKey = PREF_PREFIX + key;
if (value instanceof Boolean) {
editor.putBoolean(prefixedKey, (Boolean) value);
} else if (value instanceof Long) {
editor.putLong(prefixedKey, (Long) value);
} else if (value instanceof String) {
editor.putString(prefixedKey, (String) value);
} else {
throw Assert.createAssertionFailException("unsupported extra type: " + value.getClass());
}
editor.apply();
}
}
/** Set a boolean config value. */
public void putBoolean(String key, boolean value) {
sharedPreferences.edit().putBoolean(PREF_PREFIX + key, value).apply();
}
public void putLong(String key, long value) {
sharedPreferences.edit().putLong(PREF_PREFIX + key, value).apply();
}
public void putString(String key, String value) {
sharedPreferences.edit().putString(PREF_PREFIX + key, value).apply();
}
@Override
public String getString(String key, String defaultValue) {
// Reading shared prefs on the main thread is generally safe since a single instance is cached.
return StrictModeUtils.bypass(
() -> sharedPreferences.getString(PREF_PREFIX + key, defaultValue));
}
@Override
public long getLong(String key, long defaultValue) {
// Reading shared prefs on the main thread is generally safe since a single instance is cached.
return StrictModeUtils.bypass(() -> sharedPreferences.getLong(PREF_PREFIX + key, defaultValue));
}
@Override
public boolean getBoolean(String key, boolean defaultValue) {
// Reading shared prefs on the main thread is generally safe since a single instance is cached.
return StrictModeUtils.bypass(
() -> sharedPreferences.getBoolean(PREF_PREFIX + key, defaultValue));
}
private static SharedPreferences getSharedPrefs(Context appContext) {
return StorageComponent.get(appContext).unencryptedSharedPrefs();
}
}
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