Android 获取应用流量的使用情况有两种方法

• TrafficStats
• NetworkStatsManager 是Android 6.0（API23）中新增加的类

这次我们使用的是第二种方法，记录一下实现过程
首先说明NetworkStatsManager能提供哪些功能

• 区分 Wifi 和手机网络的流量使用
• 查询指定应用的流量使用
• 查询指定时间段的流量使用（当天/当月/总共）
• 区分接收和发送的流量使用

看下方法使用代码

/**
 * 本机使用的 wifi 总流量
 */
public long getAllBytesWifi() {
    NetworkStats.Bucket bucket;
    try {
        bucket = networkStatsManager.querySummaryForDevice(ConnectivityManager.TYPE_WIFI,
                "",
                0,
                System.currentTimeMillis());
    } catch (RemoteException e) {
        return -1;
    }
    //这里可以区分发送和接收
    return bucket.getTxBytes() +bucket.getRxBytes() ;
}

/**
 * 本机使用的 mobile 总流量
 */
public long getAllBytesMobile() {
    NetworkStats.Bucket bucket;
    try {
        bucket = networkStatsManager.querySummaryForDevice(ConnectivityManager.TYPE_MOBILE,
                getSubscriberId(context, ConnectivityManager.TYPE_MOBILE),
                0,
                System.currentTimeMillis());
    } catch (RemoteException e) {
        return -1;
    }
    //这里可以区分发送和接收
    return bucket.getTxBytes() +bucket.getRxBytes() ;
}

private String getSubscriberId(Context context, int networkType) {
        if (ConnectivityManager.TYPE_MOBILE == networkType) {
            TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
            return tm.getSubscriberId();
        }
    return "";
}

/**
 * 获取指定应用 wifi 发送的当天总流量
 * @param packageUid    应用的uid
 * @return
 */
public long getPackageTxDayBytesWifi(int packageUid) {
    NetworkStats networkStats = null;
    try {
        networkStats = networkStatsManager.queryDetailsForUid(
                ConnectivityManager.TYPE_WIFI,
                "",
                getTimesmorning(),
                System.currentTimeMillis(),
                packageUid);
    } catch (RemoteException e) {
        return -1;
    }
    NetworkStats.Bucket bucket = new NetworkStats.Bucket();
    networkStats.getNextBucket(bucket);
    return bucket.getTxBytes();
}

/**
 * 获取当天的零点时间
 *
 * @return
 */
public static long getTimesmorning() {
    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.HOUR_OF_DAY, 0);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.MILLISECOND, 0);
    return (cal.getTimeInMillis());
}

//获得本月第一天0点时间
public static int getTimesMonthmorning() {
    Calendar cal = Calendar.getInstance();
    cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
    cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.DAY_OF_MONTH));
    return (int) (cal.getTimeInMillis());
}

/**
 * 根据包名获取uid
 * @param context       上下文
 * @param packageName   包名
 */
public static int getUidByPackageName(Context context, String packageName) {
    int uid = -1;
    PackageManager packageManager = context.getPackageManager();
    try {
        PackageInfo packageInfo = packageManager.getPackageInfo(packageName, PackageManager.GET_META_DATA);
        uid = packageInfo.applicationInfo.uid;
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
    return uid;
}

调用过程

//以上的方法封装在了NetworkStatsHelper类里
public class NetworkStatsHelper {
    NetworkStatsManager networkStatsManager;
    int packageUid;

    public NetworkStatsHelper(NetworkStatsManager networkStatsManager) {
        this.networkStatsManager = networkStatsManager;
    }
}

//初始化这个工具类
NetworkStatsManager networkStatsManager = (NetworkStatsManager) getSystemService(NETWORK_STATS_SERVICE);
helper = new NetworkStatsHelper(networkStatsManager);

循环遍历应用

PackageManager packageManager = getPackageManager();
final List<PackageInfo> applicationInfoList = packageManager.getInstalledPackages(0);
for (PackageInfo info : applicationInfoList) {
    try {
        PackageInfo pack = packageManager.getPackageInfo(info.packageName,PackageManager.GET_PERMISSIONS);
        String[] requestedPermissions = pack.requestedPermissions;
        if (requestedPermissions == null)
            continue;
        if (info.applicationInfo.uid == 1000)
            continue;
        for (String str : requestedPermissions) {
            if (str.equals("android.permission.INTERNET")) {
                long mobileTodayRx = helper.getPackageDayRxBytesMobile(mContext, uid);
                //...添加自己的代码
                break;
            }
        }
    } catch (PackageManager.NameNotFoundException exception) {
        exception.printStackTrace();
    }
}

这里说明下为什么要过滤掉info.applicationInfo.uid == 1000
因为没有获取uid == 1000的进程的流量权限

好了现在说到权限，下面就是需要配置的权限

<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" tools:ignore="ProtectedPermissions"/>
<uses-permission android:name="android.permission.READ_NETWORK_USAGE_HISTORY" tools:ignore="ProtectedPermissions"/>

其中tools:ignore 就是忽略这个错误的意思，不然它会报红
仅仅在manifest里配置权限还是不够的，还要动态申请

private boolean hasPermissionToReadNetworkStats() {
    int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE);
    if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.READ_PHONE_STATE}, REQUEST_READ_PHONE_STATE);
    } else {
    }

    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
        return true;
    }
    final AppOpsManager appOps = (AppOpsManager) getSystemService(Context.APP_OPS_SERVICE);
    int mode = appOps.checkOpNoThrow(AppOpsManager.OPSTR_GET_USAGE_STATS,
            android.os.Process.myUid(), getPackageName());
    if (mode == AppOpsManager.MODE_ALLOWED) {
        return true;
    }

    requestReadNetworkStats();
    return false;
}

// 打开“有权查看使用情况的应用”页面
private void requestReadNetworkStats() {
    Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
    startActivity(intent);
}

OK，到此就应该能成功获取流量统计信息了