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.support.annotation.VisibleForTesting; 21 import android.support.v7.preference.Preference; 22 import android.support.v7.preference.PreferenceScreen; 23 import android.text.format.Formatter; 24 25 import com.android.settings.R; 26 import com.android.settings.applications.ProcStatsData; 27 import com.android.settings.applications.ProcessStatsBase; 28 import com.android.settings.core.PreferenceControllerMixin; 29 import com.android.settingslib.development.DeveloperOptionsPreferenceController; 30 import com.android.settingslib.utils.ThreadUtils; 31 32 public class MemoryUsagePreferenceController extends DeveloperOptionsPreferenceController implements 33 PreferenceControllerMixin { 34 35 private static final String MEMORY_USAGE_KEY = "memory"; 36 37 private ProcStatsData mProcStatsData; 38 MemoryUsagePreferenceController(Context context)39 public MemoryUsagePreferenceController(Context context) { 40 super(context); 41 } 42 43 @Override getPreferenceKey()44 public String getPreferenceKey() { 45 return MEMORY_USAGE_KEY; 46 } 47 48 @Override displayPreference(PreferenceScreen screen)49 public void displayPreference(PreferenceScreen screen) { 50 super.displayPreference(screen); 51 52 mProcStatsData = getProcStatsData(); 53 setDuration(); 54 } 55 56 @Override updateState(Preference preference)57 public void updateState(Preference preference) { 58 // This is posted on the background thread to speed up fragment launch time for dev options 59 // mProcStasData.refreshStats(true) takes ~20ms to run. 60 ThreadUtils.postOnBackgroundThread(() -> { 61 mProcStatsData.refreshStats(true); 62 final ProcStatsData.MemInfo memInfo = mProcStatsData.getMemInfo(); 63 final String usedResult = Formatter.formatShortFileSize(mContext, 64 (long) memInfo.realUsedRam); 65 final String totalResult = Formatter.formatShortFileSize(mContext, 66 (long) memInfo.realTotalRam); 67 ThreadUtils.postOnMainThread( 68 () -> mPreference.setSummary(mContext.getString(R.string.memory_summary, 69 usedResult, totalResult))); 70 }); 71 } 72 73 @VisibleForTesting setDuration()74 void setDuration() { 75 mProcStatsData.setDuration(ProcessStatsBase.sDurations[0] /* 3 hours */); 76 } 77 78 @VisibleForTesting getProcStatsData()79 ProcStatsData getProcStatsData() { 80 return new ProcStatsData(mContext, false); 81 } 82 } 83