Make proc stats UI app-centric instead of process-centric.

The UI now shows a much simpler overview of memory use for
the current measured duration, computing the weighted RAM
user per application.  (This is done basically by rolling up
each individual process into an app that can contain multiple
processes, and using the recently introduced weighted RAM for
all data processing.)

The details screen is updated to reflect this new design,
showing an overview of a particular application, which
separate entries for each process running for that app.

Change-Id: I47d79c30086d733eb37440a6c21b18a92b767d01

src/com/android/settings/applications/ProcStatsPackageEntry.java

@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2015 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.android.settings.applications;
+
+import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.settings.R;
+
+import java.util.ArrayList;
+
+public class ProcStatsPackageEntry implements Parcelable {
+    private static final String TAG = "ProcStatsEntry";
+    private static boolean DEBUG = ProcessStatsUi.DEBUG;
+
+    final String mPackage;
+    final ArrayList<ProcStatsEntry> mEntries = new ArrayList<ProcStatsEntry>();
+
+    long mBgDuration;
+    long mAvgBgMem;
+    long mMaxBgMem;
+    double mBgWeight;
+    long mRunDuration;
+    long mAvgRunMem;
+    long mMaxRunMem;
+    double mRunWeight;
+
+    public ApplicationInfo mUiTargetApp;
+    public String mUiLabel;
+
+    public ProcStatsPackageEntry(String pkg) {
+        mPackage = pkg;
+    }
+
+    public ProcStatsPackageEntry(Parcel in) {
+        mPackage = in.readString();
+        in.readTypedList(mEntries, ProcStatsEntry.CREATOR);
+        mBgDuration = in.readLong();
+        mAvgBgMem = in.readLong();
+        mMaxBgMem = in.readLong();
+        mBgWeight = in.readDouble();
+        mRunDuration = in.readLong();
+        mAvgRunMem = in.readLong();
+        mMaxRunMem = in.readLong();
+        mRunWeight = in.readDouble();
+    }
+
+    public void addEntry(ProcStatsEntry entry) {
+        mEntries.add(entry);
+    }
+
+    public void updateMetrics() {
+        mBgDuration = mAvgBgMem = mMaxBgMem = 0;
+        mBgWeight = 0;
+        mRunDuration = mAvgRunMem = mMaxRunMem = 0;
+        mRunWeight = 0;
+        final int N = mEntries.size();
+        for (int i=0; i<N; i++) {
+            ProcStatsEntry entry = mEntries.get(i);
+            mBgDuration += entry.mBgDuration;
+            mAvgBgMem += entry.mAvgBgMem;
+            if (entry.mMaxBgMem > mMaxBgMem) {
+                mMaxBgMem = entry.mMaxBgMem;
+            }
+            mBgWeight += entry.mBgWeight;
+            mRunDuration += entry.mRunDuration;
+            mAvgRunMem += entry.mAvgRunMem;
+            if (entry.mMaxRunMem > mMaxRunMem) {
+                mMaxRunMem = entry.mMaxRunMem;
+            }
+            mRunWeight += entry.mRunWeight;
+        }
+        mAvgBgMem /= N;
+        mAvgRunMem /= N;
+    }
+
+    public void retrieveUiData(Context context, PackageManager pm) {
+        mUiTargetApp = null;
+        mUiLabel = mPackage;
+        // Only one app associated with this process.
+        try {
+            if ("os".equals(mPackage)) {
+                mUiTargetApp = pm.getApplicationInfo("android",
+                        PackageManager.GET_DISABLED_COMPONENTS |
+                        PackageManager.GET_DISABLED_UNTIL_USED_COMPONENTS |
+                        PackageManager.GET_UNINSTALLED_PACKAGES);
+                mUiLabel = context.getString(R.string.process_stats_os_label);
+            } else {
+                mUiTargetApp = pm.getApplicationInfo(mPackage,
+                        PackageManager.GET_DISABLED_COMPONENTS |
+                        PackageManager.GET_DISABLED_UNTIL_USED_COMPONENTS |
+                        PackageManager.GET_UNINSTALLED_PACKAGES);
+                mUiLabel = mUiTargetApp.loadLabel(pm).toString();
+            }
+        } catch (PackageManager.NameNotFoundException e) {
+        }
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeString(mPackage);
+        dest.writeTypedList(mEntries);
+        dest.writeLong(mBgDuration);
+        dest.writeLong(mAvgBgMem);
+        dest.writeLong(mMaxBgMem);
+        dest.writeDouble(mBgWeight);
+        dest.writeLong(mRunDuration);
+        dest.writeLong(mAvgRunMem);
+        dest.writeLong(mMaxRunMem);
+        dest.writeDouble(mRunWeight);
+    }
+
+    public static final Parcelable.Creator<ProcStatsPackageEntry> CREATOR
+            = new Parcelable.Creator<ProcStatsPackageEntry>() {
+        public ProcStatsPackageEntry createFromParcel(Parcel in) {
+            return new ProcStatsPackageEntry(in);
+        }
+
+        public ProcStatsPackageEntry[] newArray(int size) {
+            return new ProcStatsPackageEntry[size];
+        }
+    };
+}