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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.settings.development;
import android.app.ActivityManager;
import android.app.IActivityManager;
import android.content.Context;
import android.os.RemoteException;
import androidx.annotation.VisibleForTesting;
import androidx.preference.ListPreference;
import androidx.preference.Preference;
import com.android.settings.R;
import com.android.settings.core.PreferenceControllerMixin;
import com.android.settingslib.development.DeveloperOptionsPreferenceController;
public class BackgroundProcessLimitPreferenceController extends
DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener,
PreferenceControllerMixin {
private static final String APP_PROCESS_LIMIT_KEY = "app_process_limit";
private final String[] mListValues;
private final String[] mListSummaries;
public BackgroundProcessLimitPreferenceController(Context context) {
super(context);
mListValues = context.getResources().getStringArray(R.array.app_process_limit_values);
mListSummaries = context.getResources().getStringArray(R.array.app_process_limit_entries);
}
@Override
public String getPreferenceKey() {
return APP_PROCESS_LIMIT_KEY;
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
writeAppProcessLimitOptions(newValue);
updateAppProcessLimitOptions();
return true;
}
@Override
public void updateState(Preference preference) {
updateAppProcessLimitOptions();
}
@Override
protected void onDeveloperOptionsSwitchDisabled() {
super.onDeveloperOptionsSwitchDisabled();
writeAppProcessLimitOptions(null);
}
private void updateAppProcessLimitOptions() {
try {
final int limit = getActivityManagerService().getProcessLimit();
int index = 0; // default
for (int i = 0; i < mListValues.length; i++) {
int val = Integer.parseInt(mListValues[i]);
if (val >= limit) {
index = i;
break;
}
}
final ListPreference listPreference = (ListPreference) mPreference;
listPreference.setValue(mListValues[index]);
listPreference.setSummary(mListSummaries[index]);
} catch (RemoteException e) {
// intentional no-op
}
}
private void writeAppProcessLimitOptions(Object newValue) {
try {
final int limit = newValue != null ? Integer.parseInt(newValue.toString()) : -1;
getActivityManagerService().setProcessLimit(limit);
updateAppProcessLimitOptions();
} catch (RemoteException e) {
// intentional no-op
}
}
@VisibleForTesting
IActivityManager getActivityManagerService() {
return ActivityManager.getService();
}
}
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