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| 1 | +// Copyright 2022 Google LLC |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +package com.google.firebase.perf.application; |
| 16 | + |
| 17 | +import androidx.annotation.NonNull; |
| 18 | +import androidx.core.app.FrameMetricsAggregator; |
| 19 | +import androidx.fragment.app.Fragment; |
| 20 | +import androidx.fragment.app.FragmentActivity; |
| 21 | +import androidx.fragment.app.FragmentManager; |
| 22 | +import com.google.firebase.perf.logging.AndroidLogger; |
| 23 | +import com.google.firebase.perf.transport.TransportManager; |
| 24 | +import com.google.firebase.perf.util.Clock; |
| 25 | +import com.google.firebase.perf.util.Constants; |
| 26 | + |
| 27 | +public class FragmentStateMonitor extends FragmentManager.FragmentLifecycleCallbacks { |
| 28 | + private static final AndroidLogger logger = AndroidLogger.getInstance(); |
| 29 | + private final FragmentActivity activity; |
| 30 | + private final Clock clock; |
| 31 | + private final TransportManager transportManager; |
| 32 | + private final AppStateMonitor appStateMonitor; |
| 33 | + private final FrameMetricsAggregator frameMetricsAggregator; |
| 34 | + |
| 35 | + public FragmentStateMonitor( |
| 36 | + FragmentActivity activity, |
| 37 | + Clock clock, |
| 38 | + TransportManager transportManager, |
| 39 | + AppStateMonitor appStateMonitor, |
| 40 | + FrameMetricsAggregator fma) { |
| 41 | + this.activity = activity; |
| 42 | + this.clock = clock; |
| 43 | + this.transportManager = transportManager; |
| 44 | + this.appStateMonitor = appStateMonitor; |
| 45 | + this.frameMetricsAggregator = fma; |
| 46 | + } |
| 47 | + |
| 48 | + /** |
| 49 | + * Fragment screen trace name is prefix "_st_" concatenates with Fragment's class name. |
| 50 | + * |
| 51 | + * @param fragment fragment object. |
| 52 | + * @return Fragment screen trace name. |
| 53 | + */ |
| 54 | + public static String getFragmentScreenTraceName(Fragment fragment) { |
| 55 | + return Constants.SCREEN_TRACE_PREFIX + fragment.getClass().getSimpleName(); |
| 56 | + } |
| 57 | + |
| 58 | + @Override |
| 59 | + public void onFragmentResumed(@NonNull FragmentManager fm, @NonNull Fragment f) { |
| 60 | + super.onFragmentResumed(fm, f); |
| 61 | + // Start Fragment screen trace |
| 62 | + logger.debug("FragmentMonitor %s.onFragmentResumed", f.getClass().getSimpleName()); |
| 63 | + } |
| 64 | + |
| 65 | + @Override |
| 66 | + public void onFragmentPaused(@NonNull FragmentManager fm, @NonNull Fragment f) { |
| 67 | + super.onFragmentPaused(fm, f); |
| 68 | + // Stop Fragment screen trace |
| 69 | + logger.debug("FragmentMonitor %s.onFragmentPaused ", f.getClass().getSimpleName()); |
| 70 | + } |
| 71 | +} |
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