网站应如何设计,建网站的公司深圳,360网站seo如何做,头像logo在线制作免费在内存非常吃紧的情况下#xff0c;android设备会开始kill部分非系统进程甚至系统进程来保证基本的系统运行。在这种情况下如何获取设备过去某段时间的ram使用情况至关重要。 通过开发者模式中的“内存”可以完美得知设备内存使用信息。 我们可以通过此途径#xff0c;设计一…在内存非常吃紧的情况下android设备会开始kill部分非系统进程甚至系统进程来保证基本的系统运行。在这种情况下如何获取设备过去某段时间的ram使用情况至关重要。 通过开发者模式中的“内存”可以完美得知设备内存使用信息。 我们可以通过此途径设计一套通过广播打印内存信息的方式以应对各种调试情况此文仅将内存信息通过log的形式后台打印获取。
1.发送的广播需要在BroadcastQueue.java特别处理避免被系统拦截。 2.为了避免各种权限问题将此套方案耦合在Settings模组。 3.RamInfo参考开发者模式中的方式获取过去某段时间的内存使用情况。
Index: frameworks/base/services/core/java/com/android/server/am/BroadcastQueue.java--- frameworks/base/services/core/java/com/android/server/am/BroadcastQueue.java (版本 10810)frameworks/base/services/core/java/com/android/server/am/BroadcastQueue.java (版本 10827)-121,6 121,7 sBackgroundActionWhiteListArraySet.add(com.android.settings.action.RAM_INFO);}Index: packages/apps/Settings/src/com/android/settings/applications/RamInfo.java--- packages/apps/Settings/src/com/android/settings/applications/RamInfo.java (不存在的)packages/apps/Settings/src/com/android/settings/applications/RamInfo.java (版本 10827)-0,0 1,120
package com.android.settings.applications;import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.text.format.Formatter;
import android.text.format.Formatter.BytesResult;
import android.util.Log;import com.android.settings.R;
import com.android.settings.Utils;
import com.android.settings.applications.ProcStatsData.MemInfo;import java.util.Collections;
import java.util.Comparator;
import java.util.List;public class RamInfo extends BroadcastReceiver {private static String TAG RamInfo;private PackageManager mPm;Overridepublic void onReceive(Context context, Intent intent) {Log.d(TAG, onReceive: intent.getAction());int index intent.getIntExtra(index, 3); // 0 - 3h, 1 - 6h, 2 - 12h, 3 - 24hmPm context.getPackageManager();ProcStatsData statsManager new ProcStatsData(context, false);statsManager.setDuration(ProcessStatsBase.sDurations[index]);MemInfo memInfo statsManager.getMemInfo();double usedRam memInfo.realUsedRam;double totalRam memInfo.realTotalRam;double freeRam memInfo.realFreeRam;BytesResult usedResult Formatter.formatBytes(context.getResources(), (long) usedRam,Formatter.FLAG_SHORTER);String totalString Formatter.formatShortFileSize(context, (long) totalRam);String freeString Formatter.formatShortFileSize(context, (long) freeRam);CharSequence memString;CharSequence[] memStatesStr context.getResources().getTextArray(R.array.ram_states);int memState statsManager.getMemState();if (memState 0 memState memStatesStr.length - 1) {memString memStatesStr[memState];} else {memString memStatesStr[memStatesStr.length - 1];}String durationString context.getResources().getString(ProcessStatsBase.sDurationLabels[index]);int numApps statsManager.getEntries().size();Log.d(TAG, ********** RAM INFO ( durationString ) **********);// AverageLog.d(TAG, context.getResources().getString(R.string.memory_avg_use) : usedResult.value usedResult.units);// PerformanceLog.d(TAG, context.getResources().getString(R.string.memory_performance) : memString);// Total memoryLog.d(TAG, context.getResources().getString(R.string.total_memory) : totalString);// Average usedLog.d(TAG, context.getResources().getString(R.string.average_used) : (Utils.formatPercentage((long) usedRam, (long) totalRam)));// FreeLog.d(TAG, context.getResources().getString(R.string.free_memory) : freeString);// Memory used by appsLog.d(TAG, context.getResources().getString(R.string.memory_usage_apps) : context.getResources().getQuantityString(R.plurals.memory_usage_apps_summary, numApps, numApps, durationString));boolean mShowMax false;ListProcStatsPackageEntry pkgEntries statsManager.getEntries();// Update everything and get the absolute maximum of memory usage for scaling.for (int i 0, N pkgEntries.size(); i N; i) {ProcStatsPackageEntry pkg pkgEntries.get(i);pkg.updateMetrics();}Collections.sort(pkgEntries, mShowMax ? sMaxPackageEntryCompare : sPackageEntryCompare);for (int i 0; i pkgEntries.size(); i) {ProcStatsPackageEntry pkg pkgEntries.get(i);pkg.retrieveUiData(context, mPm);boolean statsForeground pkg.mRunWeight pkg.mBgWeight;double avgAmount (statsForeground ? pkg.mRunWeight : pkg.mBgWeight) * memInfo.weightToRam;double maxAmount (statsForeground ? pkg.mMaxRunMem : pkg.mMaxBgMem) * memInfo.totalScale * 1024;Log.d(TAG, pkg.mUiLabel ( pkg.mPackage ) { context.getResources().getString(R.string.memory_avg_use) : Formatter.formatShortFileSize(context, (long) avgAmount) context.getResources().getString(R.string.memory_max_use) : Formatter.formatShortFileSize(context, (long) maxAmount) });}Log.d(TAG, ********** RAM INFO END **********);}final static ComparatorProcStatsPackageEntry sPackageEntryComparenew ComparatorProcStatsPackageEntry() {Overridepublic int compare(ProcStatsPackageEntry lhs, ProcStatsPackageEntry rhs) {double rhsWeight Math.max(rhs.mRunWeight, rhs.mBgWeight);double lhsWeight Math.max(lhs.mRunWeight, lhs.mBgWeight);if (lhsWeight rhsWeight) {return 0;}return lhsWeight rhsWeight ? 1 : -1;}};final static ComparatorProcStatsPackageEntry sMaxPackageEntryComparenew ComparatorProcStatsPackageEntry() {Overridepublic int compare(ProcStatsPackageEntry lhs, ProcStatsPackageEntry rhs) {double rhsMax Math.max(rhs.mMaxBgMem, rhs.mMaxRunMem);double lhsMax Math.max(lhs.mMaxBgMem, lhs.mMaxRunMem);if (lhsMax rhsMax) {return 0;}return lhsMax rhsMax ? 1 : -1;}};
}
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Index: packages/apps/Settings/AndroidManifest.xml--- packages/apps/Settings/AndroidManifest.xml (版本 10810)packages/apps/Settings/AndroidManifest.xml (版本 10827)-3603,5 3603,11 /intent-filter/receiver receiver android:name.applications.RamInfointent-filter action android:namecom.android.settings.action.RAM_INFO //intent-filter/receiver /application/manifest
