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/*
* Copyright (C) 2018 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.google.android.setupcompat.internal;
import static java.util.concurrent.TimeUnit.NANOSECONDS;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Context;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.util.Log;
import com.google.android.setupcompat.logging.MetricKey;
import com.google.android.setupcompat.logging.SetupMetricsLogger;
import com.google.android.setupcompat.util.WizardManagerHelper;
/** Fragment used to detect lifecycle of an activity for metrics logging. */
public class LifecycleFragment extends Fragment {
private static final String LOG_TAG = LifecycleFragment.class.getSimpleName();
private static final String FRAGMENT_ID = "lifecycle_monitor";
private MetricKey metricKey;
private long startInNanos;
private long durationInNanos = 0;
public LifecycleFragment() {
setRetainInstance(true);
}
/**
* Attaches the lifecycle fragment if it is not attached yet.
*
* @param activity the activity to detect lifecycle for.
* @return fragment to monitor life cycle.
*/
public static LifecycleFragment attachNow(Activity activity) {
if (WizardManagerHelper.isAnySetupWizard(activity.getIntent())) {
SetupCompatServiceInvoker.get(activity.getApplicationContext())
.bindBack(
LayoutBindBackHelper.getScreenName(activity),
LayoutBindBackHelper.getExtraBundle(activity));
if (VERSION.SDK_INT > VERSION_CODES.M) {
FragmentManager fragmentManager = activity.getFragmentManager();
if (fragmentManager != null && !fragmentManager.isDestroyed()) {
Fragment fragment = fragmentManager.findFragmentByTag(FRAGMENT_ID);
if (fragment == null) {
LifecycleFragment lifeCycleFragment = new LifecycleFragment();
try {
fragmentManager.beginTransaction().add(lifeCycleFragment, FRAGMENT_ID).commitNow();
fragment = lifeCycleFragment;
} catch (IllegalStateException e) {
Log.e(
LOG_TAG,
"Error occurred when attach to Activity:" + activity.getComponentName(),
e);
}
} else if (!(fragment instanceof LifecycleFragment)) {
Log.wtf(
LOG_TAG,
activity.getClass().getSimpleName() + " Incorrect instance on lifecycle fragment.");
return null;
}
return (LifecycleFragment) fragment;
}
}
}
return null;
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
metricKey = MetricKey.get("ScreenDuration", getActivity().getClass().getSimpleName());
}
@Override
public void onDetach() {
super.onDetach();
SetupMetricsLogger.logDuration(getActivity(), metricKey, NANOSECONDS.toMillis(durationInNanos));
}
@Override
public void onResume() {
super.onResume();
startInNanos = ClockProvider.timeInNanos();
}
@Override
public void onPause() {
super.onPause();
durationInNanos += (ClockProvider.timeInNanos() - startInNanos);
}
}
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