Merge "Moving a few testing classes to a separate package" into ub-launcher3-master

5 files changed, 752 insertions, 0 deletions

diff --git a/src/com/android/launcher3/testing/DummyWidget.java b/src/com/android/launcher3/testing/DummyWidget.java
new file mode 100644
index 000000000..df887ac1f
--- /dev/null
+++ b/src/com/android/launcher3/testing/DummyWidget.java
@@ -0,0 +1,53 @@
+package com.android.launcher3.testing;
+
+import android.appwidget.AppWidgetProviderInfo;
+
+import com.android.launcher3.CustomAppWidget;
+import com.android.launcher3.R;
+
+public class DummyWidget implements CustomAppWidget {
+    @Override
+    public String getLabel() {
+        return "Dumb Launcher Widget";
+    }
+
+    @Override
+    public int getPreviewImage() {
+        return 0;
+    }
+
+    @Override
+    public int getIcon() {
+        return 0;
+    }
+
+    @Override
+    public int getWidgetLayout() {
+        return R.layout.zzz_dummy_widget;
+    }
+
+    @Override
+    public int getSpanX() {
+        return 2;
+    }
+
+    @Override
+    public int getSpanY() {
+        return 2;
+    }
+
+    @Override
+    public int getMinSpanX() {
+        return 1;
+    }
+
+    @Override
+    public int getMinSpanY() {
+        return 1;
+    }
+
+    @Override
+    public int getResizeMode() {
+        return AppWidgetProviderInfo.RESIZE_BOTH;
+    }
+}
diff --git a/src/com/android/launcher3/testing/MemoryDumpActivity.java b/src/com/android/launcher3/testing/MemoryDumpActivity.java
new file mode 100644
index 000000000..9bcf92b1b
--- /dev/null
+++ b/src/com/android/launcher3/testing/MemoryDumpActivity.java
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2013 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.launcher3.testing;
+
+import android.app.Activity;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Environment;
+import android.os.IBinder;
+import android.util.Log;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
+
+public class MemoryDumpActivity extends Activity {
+    private static final String TAG = "MemoryDumpActivity";
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    public static String zipUp(ArrayList<String> paths) {
+        final int BUFSIZ = 256 * 1024; // 256K
+        final byte[] buf = new byte[BUFSIZ];
+        final String zipfilePath = String.format("%s/hprof-%d.zip",
+                Environment.getExternalStorageDirectory(),
+                System.currentTimeMillis());
+        ZipOutputStream zos = null;
+        try {
+            OutputStream os = new FileOutputStream(zipfilePath);
+            zos = new ZipOutputStream(new BufferedOutputStream(os));
+            for (String filename : paths) {
+                InputStream is = null;
+                try {
+                    is = new BufferedInputStream(new FileInputStream(filename));
+                    ZipEntry entry = new ZipEntry(filename);
+                    zos.putNextEntry(entry);
+                    int len;
+                    while ( 0 < (len = is.read(buf, 0, BUFSIZ)) ) {
+                        zos.write(buf, 0, len);
+                    }
+                    zos.closeEntry();
+                } finally {
+                    is.close();
+                }
+            }
+        } catch (IOException e) {
+            Log.e(TAG, "error zipping up profile data", e);
+            return null;
+        } finally {
+            if (zos != null) {
+                try {
+                    zos.close();
+                } catch (IOException e) {
+                    // ugh, whatever
+                }
+            }
+        }
+        return zipfilePath;
+    }
+
+    public static void dumpHprofAndShare(final Context context, MemoryTracker tracker) {
+        final StringBuilder body = new StringBuilder();
+
+        final ArrayList<String> paths = new ArrayList<String>();
+        final int myPid = android.os.Process.myPid();
+
+        final int[] pids_orig = tracker.getTrackedProcesses();
+        final int[] pids_copy = Arrays.copyOf(pids_orig, pids_orig.length);
+        for (int pid : pids_copy) {
+            MemoryTracker.ProcessMemInfo info = tracker.getMemInfo(pid);
+            if (info != null) {
+                body.append("pid ").append(pid).append(":")
+                    .append(" up=").append(info.getUptime())
+                    .append(" pss=").append(info.currentPss)
+                    .append(" uss=").append(info.currentUss)
+                    .append("\n");
+            }
+            if (pid == myPid) {
+                final String path = String.format("%s/launcher-memory-%d.ahprof",
+                        Environment.getExternalStorageDirectory(),
+                        pid);
+                Log.v(TAG, "Dumping memory info for process " + pid + " to " + path);
+                try {
+                    android.os.Debug.dumpHprofData(path); // will block
+                } catch (IOException e) {
+                    Log.e(TAG, "error dumping memory:", e);
+                }
+                paths.add(path);
+            }
+        }
+
+        String zipfile = zipUp(paths);
+
+        if (zipfile == null) return;
+
+        Intent shareIntent = new Intent(Intent.ACTION_SEND);
+        shareIntent.setType("application/zip");
+
+        final PackageManager pm = context.getPackageManager();
+        shareIntent.putExtra(Intent.EXTRA_SUBJECT, String.format("Launcher memory dump (%d)", myPid));
+        String appVersion;
+        try {
+            appVersion = pm.getPackageInfo(context.getPackageName(), 0).versionName;
+        } catch (PackageManager.NameNotFoundException e) {
+            appVersion = "?";
+        }
+
+        body.append("\nApp version: ").append(appVersion).append("\nBuild: ").append(Build.DISPLAY).append("\n");
+        shareIntent.putExtra(Intent.EXTRA_TEXT, body.toString());
+
+        final File pathFile = new File(zipfile);
+        final Uri pathUri = Uri.fromFile(pathFile);
+
+        shareIntent.putExtra(Intent.EXTRA_STREAM, pathUri);
+        context.startActivity(shareIntent);
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+
+        startDump(this, new Runnable() {
+            @Override
+            public void run() {
+                finish();
+            }
+        });
+    }
+
+    public static void startDump(final Context context) {
+        startDump(context, null);
+    }
+
+    public static void startDump(final Context context, final Runnable andThen) {
+        final ServiceConnection connection = new ServiceConnection() {
+            public void onServiceConnected(ComponentName className, IBinder service) {
+                Log.v(TAG, "service connected, dumping...");
+                dumpHprofAndShare(context,
+                        ((MemoryTracker.MemoryTrackerInterface) service).getService());
+                context.unbindService(this);
+                if (andThen != null) andThen.run();
+            }
+
+            public void onServiceDisconnected(ComponentName className) {
+            }
+        };
+        Log.v(TAG, "attempting to bind to memory tracker");
+        context.bindService(new Intent(context, MemoryTracker.class),
+                connection, Context.BIND_AUTO_CREATE);
+    }
+}
diff --git a/src/com/android/launcher3/testing/MemoryTracker.java b/src/com/android/launcher3/testing/MemoryTracker.java
new file mode 100644
index 000000000..ed2a3122c
--- /dev/null
+++ b/src/com/android/launcher3/testing/MemoryTracker.java
@@ -0,0 +1,217 @@
+/*
+ * Copyright (C) 2013 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.launcher3.testing;
+
+import android.app.ActivityManager;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Binder;
+import android.os.Debug;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Message;
+import android.os.SystemClock;
+import android.util.Log;
+import android.util.LongSparseArray;
+
+import com.android.launcher3.util.TestingUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class MemoryTracker extends Service {
+    public static final String TAG = MemoryTracker.class.getSimpleName();
+
+    private static final long UPDATE_RATE = 5000;
+
+    private static final int MSG_START = 1;
+    private static final int MSG_STOP = 2;
+    private static final int MSG_UPDATE = 3;
+
+    public static class ProcessMemInfo {
+        public int pid;
+        public String name;
+        public long startTime;
+        public long currentPss, currentUss;
+        public long[] pss = new long[256];
+        public long[] uss = new long[256];
+            //= new Meminfo[(int) (30 * 60 / (UPDATE_RATE / 1000))]; // 30 minutes
+        public long max = 1;
+        public int head = 0;
+        public ProcessMemInfo(int pid, String name, long start) {
+            this.pid = pid;
+            this.name = name;
+            this.startTime = start;
+        }
+        public long getUptime() {
+            return System.currentTimeMillis() - startTime;
+        }
+    };
+    public final LongSparseArray<ProcessMemInfo> mData = new LongSparseArray<ProcessMemInfo>();
+    public final ArrayList<Long> mPids = new ArrayList<Long>();
+    private int[] mPidsArray = new int[0];
+    private final Object mLock = new Object();
+
+    Handler mHandler = new Handler() {
+        @Override
+        public void handleMessage(Message m) {
+            switch (m.what) {
+                case MSG_START:
+                    mHandler.removeMessages(MSG_UPDATE);
+                    mHandler.sendEmptyMessage(MSG_UPDATE);
+                    break;
+                case MSG_STOP:
+                    mHandler.removeMessages(MSG_UPDATE);
+                    break;
+                case MSG_UPDATE:
+                    update();
+                    mHandler.removeMessages(MSG_UPDATE);
+                    mHandler.sendEmptyMessageDelayed(MSG_UPDATE, UPDATE_RATE);
+                    break;
+            }
+        }
+    };
+
+    ActivityManager mAm;
+
+    public ProcessMemInfo getMemInfo(int pid) {
+        return mData.get(pid);
+    }
+
+    public int[] getTrackedProcesses() {
+        return mPidsArray;
+    }
+
+    public void startTrackingProcess(int pid, String name, long start) {
+        synchronized (mLock) {
+            final Long lpid = Long.valueOf(pid);
+
+            if (mPids.contains(lpid)) return;
+
+            mPids.add(lpid);
+            updatePidsArrayL();
+
+            mData.put(pid, new ProcessMemInfo(pid, name, start));
+        }
+    }
+
+    void updatePidsArrayL() {
+        final int N = mPids.size();
+        mPidsArray = new int[N];
+        StringBuffer sb = new StringBuffer("Now tracking processes: ");
+        for (int i=0; i<N; i++) {
+            final int p = mPids.get(i).intValue();
+            mPidsArray[i] = p;
+            sb.append(p); sb.append(" ");
+        }
+        Log.v(TAG, sb.toString());
+    }
+
+    void update() {
+        synchronized (mLock) {
+            Debug.MemoryInfo[] dinfos = mAm.getProcessMemoryInfo(mPidsArray);
+            for (int i=0; i<dinfos.length; i++) {
+                Debug.MemoryInfo dinfo = dinfos[i];
+                if (i > mPids.size()) {
+                    Log.e(TAG, "update: unknown process info received: " + dinfo);
+                    break;
+                }
+                final long pid = mPids.get(i).intValue();
+                final ProcessMemInfo info = mData.get(pid);
+                info.head = (info.head+1) % info.pss.length;
+                info.pss[info.head] = info.currentPss = dinfo.getTotalPss();
+                info.uss[info.head] = info.currentUss = dinfo.getTotalPrivateDirty();
+                if (info.currentPss > info.max) info.max = info.currentPss;
+                if (info.currentUss > info.max) info.max = info.currentUss;
+                // Log.v(TAG, "update: pid " + pid + " pss=" + info.currentPss + " uss=" + info.currentUss);
+                if (info.currentPss == 0) {
+                    Log.v(TAG, "update: pid " + pid + " has pss=0, it probably died");
+                    mData.remove(pid);
+                }
+            }
+            for (int i=mPids.size()-1; i>=0; i--) {
+                final long pid = mPids.get(i).intValue();
+                if (mData.get(pid) == null) {
+                    mPids.remove(i);
+                    updatePidsArrayL();
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onCreate() {
+        mAm = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
+
+        // catch up in case we crashed but other processes are still running
+        List<ActivityManager.RunningServiceInfo> svcs = mAm.getRunningServices(256);
+        for (ActivityManager.RunningServiceInfo svc : svcs) {
+            if (svc.service.getPackageName().equals(getPackageName())) {
+                Log.v(TAG, "discovered running service: " + svc.process + " (" + svc.pid + ")");
+                startTrackingProcess(svc.pid, svc.process,
+                        System.currentTimeMillis() - (SystemClock.elapsedRealtime() - svc.activeSince));
+            }
+        }
+
+        List<ActivityManager.RunningAppProcessInfo> procs = mAm.getRunningAppProcesses();
+        for (ActivityManager.RunningAppProcessInfo proc : procs) {
+            final String pname = proc.processName;
+            if (pname.startsWith(getPackageName())) {
+                Log.v(TAG, "discovered other running process: " + pname + " (" + proc.pid + ")");
+                startTrackingProcess(proc.pid, pname, System.currentTimeMillis());
+            }
+        }
+    }
+
+    @Override
+    public void onDestroy() {
+        mHandler.sendEmptyMessage(MSG_STOP);
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        Log.v(TAG, "Received start id " + startId + ": " + intent);
+
+        if (intent != null) {
+            if (TestingUtils.ACTION_START_TRACKING.equals(intent.getAction())) {
+                final int pid = intent.getIntExtra("pid", -1);
+                final String name = intent.getStringExtra("name");
+                final long start = intent.getLongExtra("start", System.currentTimeMillis());
+                startTrackingProcess(pid, name, start);
+            }
+        }
+
+        mHandler.sendEmptyMessage(MSG_START);
+
+        return START_STICKY;
+    }
+
+    public class MemoryTrackerInterface extends Binder {
+        MemoryTracker getService() {
+            return MemoryTracker.this;
+        }
+    }
+
+    private final IBinder mBinder = new MemoryTrackerInterface();
+
+    public IBinder onBind(Intent intent) {
+        mHandler.sendEmptyMessage(MSG_START);
+
+        return mBinder;
+    }
+}
diff --git a/src/com/android/launcher3/testing/ToggleWeightWatcher.java b/src/com/android/launcher3/testing/ToggleWeightWatcher.java
new file mode 100644
index 000000000..15e55eea6
--- /dev/null
+++ b/src/com/android/launcher3/testing/ToggleWeightWatcher.java
@@ -0,0 +1,32 @@
+package com.android.launcher3.testing;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.view.View;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherAppState;
+import com.android.launcher3.util.TestingUtils;
+
+public class ToggleWeightWatcher extends Activity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        String spKey = LauncherAppState.getSharedPreferencesKey();
+        SharedPreferences sp = getSharedPreferences(spKey, Context.MODE_PRIVATE);
+        boolean show = sp.getBoolean(TestingUtils.SHOW_WEIGHT_WATCHER, true);
+
+        show = !show;
+        sp.edit().putBoolean(TestingUtils.SHOW_WEIGHT_WATCHER, show).apply();
+
+        Launcher launcher = (Launcher) LauncherAppState.getInstance().getModel().getCallback();
+        if (launcher != null && launcher.mWeightWatcher != null) {
+            launcher.mWeightWatcher.setVisibility(show ? View.VISIBLE : View.GONE);
+        }
+        finish();
+    }
+}
diff --git a/src/com/android/launcher3/testing/WeightWatcher.java b/src/com/android/launcher3/testing/WeightWatcher.java
new file mode 100644
index 000000000..a26a2b642
--- /dev/null
+++ b/src/com/android/launcher3/testing/WeightWatcher.java
@@ -0,0 +1,267 @@
+/*
+ * Copyright (C) 2013 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.launcher3.testing;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Message;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.util.TypedValue;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import com.android.launcher3.util.Thunk;
+
+public class WeightWatcher extends LinearLayout {
+    private static final int RAM_GRAPH_RSS_COLOR = 0xFF990000;
+    private static final int RAM_GRAPH_PSS_COLOR = 0xFF99CC00;
+    private static final int TEXT_COLOR = 0xFFFFFFFF;
+    private static final int BACKGROUND_COLOR = 0xc0000000;
+
+    private static final int UPDATE_RATE = 5000;
+
+    private static final int MSG_START = 1;
+    private static final int MSG_STOP = 2;
+    private static final int MSG_UPDATE = 3;
+
+    static int indexOf(int[] a, int x) {
+        for (int i=0; i<a.length; i++) {
+            if (a[i] == x) return i;
+        }
+        return -1;
+    }
+
+    Handler mHandler = new Handler() {
+        @Override
+        public void handleMessage(Message m) {
+            switch (m.what) {
+                case MSG_START:
+                    mHandler.sendEmptyMessage(MSG_UPDATE);
+                    break;
+                case MSG_STOP:
+                    mHandler.removeMessages(MSG_UPDATE);
+                    break;
+                case MSG_UPDATE:
+                    int[] pids = mMemoryService.getTrackedProcesses();
+
+                    final int N = getChildCount();
+                    if (pids.length != N) initViews();
+                    else for (int i=0; i<N; i++) {
+                        ProcessWatcher pw = ((ProcessWatcher) getChildAt(i));
+                        if (indexOf(pids, pw.getPid()) < 0) {
+                            initViews();
+                            break;
+                        }
+                        pw.update();
+                    }
+                    mHandler.sendEmptyMessageDelayed(MSG_UPDATE, UPDATE_RATE);
+                    break;
+            }
+        }
+    };
+    @Thunk MemoryTracker mMemoryService;
+
+    public WeightWatcher(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        ServiceConnection connection = new ServiceConnection() {
+            public void onServiceConnected(ComponentName className, IBinder service) {
+                mMemoryService = ((MemoryTracker.MemoryTrackerInterface)service).getService();
+                initViews();
+            }
+
+            public void onServiceDisconnected(ComponentName className) {
+                mMemoryService = null;
+            }
+        };
+        context.bindService(new Intent(context, MemoryTracker.class),
+                connection, Context.BIND_AUTO_CREATE);
+
+        setOrientation(LinearLayout.VERTICAL);
+
+        setBackgroundColor(BACKGROUND_COLOR);
+    }
+
+    public void initViews() {
+        removeAllViews();
+        int[] processes = mMemoryService.getTrackedProcesses();
+        for (int i=0; i<processes.length; i++) {
+            final ProcessWatcher v = new ProcessWatcher(getContext());
+            v.setPid(processes[i]);
+            addView(v);
+        }
+    }
+
+    @Override
+    public void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        mHandler.sendEmptyMessage(MSG_START);
+    }
+
+    @Override
+    public void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        mHandler.sendEmptyMessage(MSG_STOP);
+    }
+
+    public class ProcessWatcher extends LinearLayout {
+        GraphView mRamGraph;
+        TextView mText;
+        int mPid;
+        @Thunk MemoryTracker.ProcessMemInfo mMemInfo;
+
+        public ProcessWatcher(Context context) {
+            this(context, null);
+        }
+
+        public ProcessWatcher(Context context, AttributeSet attrs) {
+            super(context, attrs);
+
+            final float dp = getResources().getDisplayMetrics().density;
+
+            mText = new TextView(getContext());
+            mText.setTextColor(TEXT_COLOR);
+            mText.setTextSize(TypedValue.COMPLEX_UNIT_PX, 10 * dp);
+            mText.setGravity(Gravity.LEFT | Gravity.CENTER_VERTICAL);
+
+            final int p = (int)(2*dp);
+            setPadding(p, 0, p, 0);
+
+            mRamGraph = new GraphView(getContext());
+
+            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
+                    0,
+                    (int)(14 * dp),
+                    1f
+            );
+
+            addView(mText, params);
+            params.leftMargin = (int)(4*dp);
+            params.weight = 0f;
+            params.width = (int)(200 * dp);
+            addView(mRamGraph, params);
+        }
+
+        public void setPid(int pid) {
+            mPid = pid;
+            mMemInfo = mMemoryService.getMemInfo(mPid);
+            if (mMemInfo == null) {
+                Log.v("WeightWatcher", "Missing info for pid " + mPid + ", removing view: " + this);
+                initViews();
+            }
+        }
+
+        public int getPid() {
+            return mPid;
+        }
+
+        public String getUptimeString() {
+            long sec = mMemInfo.getUptime() / 1000;
+            StringBuilder sb = new StringBuilder();
+            long days = sec / 86400;
+            if (days > 0) {
+                sec -= days * 86400;
+                sb.append(days);
+                sb.append("d");
+            }
+
+            long hours = sec / 3600;
+            if (hours > 0) {
+                sec -= hours * 3600;
+                sb.append(hours);
+                sb.append("h");
+            }
+
+            long mins = sec / 60;
+            if (mins > 0) {
+                sec -= mins * 60;
+                sb.append(mins);
+                sb.append("m");
+            }
+
+            sb.append(sec);
+            sb.append("s");
+            return sb.toString();
+        }
+
+        public void update() {
+            //Log.v("WeightWatcher.ProcessWatcher",
+            //        "MSG_UPDATE pss=" + mMemInfo.currentPss);
+            mText.setText("(" + mPid
+                          + (mPid == android.os.Process.myPid()
+                                ? "/A"  // app
+                                : "/S") // service
+                          + ") up " + getUptimeString()
+                          + " P=" + mMemInfo.currentPss
+                          + " U=" + mMemInfo.currentUss
+                          );
+            mRamGraph.invalidate();
+        }
+
+        public class GraphView extends View {
+            Paint pssPaint, ussPaint, headPaint;
+
+            public GraphView(Context context, AttributeSet attrs) {
+                super(context, attrs);
+
+                pssPaint = new Paint();
+                pssPaint.setColor(RAM_GRAPH_PSS_COLOR);
+                ussPaint = new Paint();
+                ussPaint.setColor(RAM_GRAPH_RSS_COLOR);
+                headPaint = new Paint();
+                headPaint.setColor(Color.WHITE);
+            }
+
+            public GraphView(Context context) {
+                this(context, null);
+            }
+
+            @Override
+            public void onDraw(Canvas c) {
+                int w = c.getWidth();
+                int h = c.getHeight();
+
+                if (mMemInfo == null) return;
+
+                final int N = mMemInfo.pss.length;
+                final float barStep = (float) w / N;
+                final float barWidth = Math.max(1, barStep);
+                final float scale = (float) h / mMemInfo.max;
+
+                int i;
+                float x;
+                for (i=0; i<N; i++) {
+                    x = i * barStep;
+                    c.drawRect(x, h - scale * mMemInfo.pss[i], x + barWidth, h, pssPaint);
+                    c.drawRect(x, h - scale * mMemInfo.uss[i], x + barWidth, h, ussPaint);
+                }
+                x = mMemInfo.head * barStep;
+                c.drawRect(x, 0, x + barWidth, h, headPaint);
+            }
+        }
+    }
+}