1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.settings.development; 18 19 import android.content.Context; 20 import android.text.format.Formatter; 21 22 import androidx.annotation.VisibleForTesting; 23 import androidx.preference.Preference; 24 import androidx.preference.PreferenceScreen; 25 26 import com.android.settings.R; 27 import com.android.settings.applications.ProcStatsData; 28 import com.android.settings.applications.ProcessStatsBase; 29 import com.android.settings.core.PreferenceControllerMixin; 30 import com.android.settingslib.development.DeveloperOptionsPreferenceController; 31 import com.android.settingslib.utils.ThreadUtils; 32 33 public class MemoryUsagePreferenceController extends DeveloperOptionsPreferenceController implements 34 PreferenceControllerMixin { 35 36 private static final String MEMORY_USAGE_KEY = "memory"; 37 38 private ProcStatsData mProcStatsData; 39 MemoryUsagePreferenceController(Context context)40 public MemoryUsagePreferenceController(Context context) { 41 super(context); 42 } 43 44 @Override getPreferenceKey()45 public String getPreferenceKey() { 46 return MEMORY_USAGE_KEY; 47 } 48 49 @Override displayPreference(PreferenceScreen screen)50 public void displayPreference(PreferenceScreen screen) { 51 super.displayPreference(screen); 52 53 mProcStatsData = getProcStatsData(); 54 setDuration(); 55 } 56 57 @Override updateState(Preference preference)58 public void updateState(Preference preference) { 59 // This is posted on the background thread to speed up fragment launch time for dev options 60 // mProcStasData.refreshStats(true) takes ~20ms to run. 61 ThreadUtils.postOnBackgroundThread(() -> { 62 mProcStatsData.refreshStats(true); 63 final ProcStatsData.MemInfo memInfo = mProcStatsData.getMemInfo(); 64 final String usedResult = Formatter.formatShortFileSize(mContext, 65 (long) memInfo.realUsedRam); 66 final String totalResult = Formatter.formatShortFileSize(mContext, 67 (long) memInfo.realTotalRam); 68 ThreadUtils.postOnMainThread( 69 () -> mPreference.setSummary(mContext.getString(R.string.memory_summary, 70 usedResult, totalResult))); 71 }); 72 } 73 74 @VisibleForTesting setDuration()75 void setDuration() { 76 mProcStatsData.setDuration(ProcessStatsBase.sDurations[0] /* 3 hours */); 77 } 78 79 @VisibleForTesting getProcStatsData()80 ProcStatsData getProcStatsData() { 81 return new ProcStatsData(mContext, false); 82 } 83 } 84