Add test UsageStats App

        private boolean hasPermission(String callingPackage) {

            final int mode = mAppOps.checkOp(AppOpsManager.OP_GET_USAGE_STATS,

                    Binder.getCallingUid(), callingPackage);

            if (mode == AppOpsManager.MODE_IGNORED) {

                // If AppOpsManager ignores this, still allow if we have the system level

            if (mode == AppOpsManager.MODE_DEFAULT) {

                // The default behavior here is to check if PackageManager has given the app

                // permission.

                return getContext().checkCallingPermission(Manifest.permission.PACKAGE_USAGE_STATS)

                        == PackageManager.PERMISSION_GRANTED;

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE_TAGS := tests

# Only compile source java files in this apk.

LOCAL_SRC_FILES := $(call all-java-files-under, src)

LOCAL_PACKAGE_NAME := UsageStatsTest

include $(BUILD_PACKAGE)

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.android.tests.usagestats">

    <uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" />

    <application android:label="Usage Access Test">

        <activity android:name=".UsageStatsActivity"

                  android:label="Device Usage History">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingLeft="16dp"

    android:paddingRight="16dp">

    <TextView android:id="@android:id/text1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_centerVertical="true"

        android:textStyle="bold"/>

    <TextView android:id="@android:id/text2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentRight="true"

        android:layout_alignBaseline="@android:id/text1"/>

</RelativeLayout>

/*

 * Copyright (C) 2014 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.tests.usagestats;

import android.app.ListActivity;

import android.app.usage.PackageUsageStats;

import android.app.usage.UsageStats;

import android.app.usage.UsageStatsManager;

import android.content.Context;

import android.os.Bundle;

import android.text.format.DateUtils;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.TextView;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.Collections;

import java.util.Comparator;

public class UsageStatsActivity extends ListActivity {

    private UsageStatsManager mUsageStatsManager;

    private Adapter mAdapter;

    private Comparator<PackageUsageStats> mComparator = new Comparator<PackageUsageStats>() {

        @Override

        public int compare(PackageUsageStats o1, PackageUsageStats o2) {

            return Long.compare(o2.getTotalTimeSpent(), o1.getTotalTimeSpent());

        }

    };

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        mUsageStatsManager = (UsageStatsManager) getSystemService(Context.USAGE_STATS_SERVICE);

        mAdapter = new Adapter();

        updateAdapter();

        setListAdapter(mAdapter);

    }

    @Override

    protected void onResume() {

        super.onResume();

        updateAdapter();

    }

    private void updateAdapter() {

        Calendar cal = Calendar.getInstance();

        cal.add(Calendar.DAY_OF_YEAR, -14);

        UsageStats stats = mUsageStatsManager.getRecentStatsSince(cal.getTimeInMillis());

        mAdapter.update(stats);

    }

    private class Adapter extends BaseAdapter {

        private ArrayList<PackageUsageStats> mStats = new ArrayList<>();

        public void update(UsageStats stats) {

            mStats.clear();

            if (stats == null) {

                return;

            }

            final int packageCount = stats.getPackageCount();

            for (int i = 0; i < packageCount; i++) {

                mStats.add(stats.getPackage(i));

            }

            Collections.sort(mStats, mComparator);

            notifyDataSetChanged();

        }

        @Override

        public int getCount() {

            return mStats.size();

        }

        @Override

        public Object getItem(int position) {

            return mStats.get(position);

        }

        @Override

        public long getItemId(int position) {

            return position;

        }

        @Override

        public View getView(int position, View convertView, ViewGroup parent) {

            final ViewHolder holder;

            if (convertView == null) {

                convertView = LayoutInflater.from(UsageStatsActivity.this)

                        .inflate(R.layout.row_item, parent, false);

                holder = new ViewHolder();

                holder.packageName = (TextView) convertView.findViewById(android.R.id.text1);

                holder.usageTime = (TextView) convertView.findViewById(android.R.id.text2);

                convertView.setTag(holder);

            } else {

                holder = (ViewHolder) convertView.getTag();

            }

            holder.packageName.setText(mStats.get(position).getPackageName());

            holder.usageTime.setText(DateUtils.formatDuration(

                    mStats.get(position).getTotalTimeSpent()));

            return convertView;

        }

    }

    private static class ViewHolder {

        TextView packageName;

        TextView usageTime;

    }

}

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