Android 獲取應用流量的使用情況有兩種方法

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

這次我們使用的是第二種方法，記錄一下實現過程
首先說明NetworkStatsManager能提供哪些功能

• 區分 Wifi 和手機網絡的流量使用
• 查詢指定應用的流量使用
• 查詢指定時間段的流量使用（當天/當月/總共）
• 區分接收和發送的流量使用

看下方法使用代碼

/**
 * 本機使用的 wifi 總流量
 */
public long getAllBytesWifi() {
    NetworkStats.Bucket bucket;
    try {
        bucket = networkStatsManager.querySummaryForDevice(ConnectivityManager.TYPE_WIFI,
                "",
                0,
                System.currentTimeMillis());
    } catch (RemoteException e) {
        return -1;
    }
    //這里可以區分發送和接收
    return bucket.getTxBytes() +bucket.getRxBytes() ;
}

/**
 * 本機使用的 mobile 總流量
 */
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;
    }
    //這里可以區分發送和接收
    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 "";
}

/**
 * 獲取指定應用 wifi 發送的當天總流量
 * @param packageUid    應用的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();
}

/**
 * 獲取當天的零點時間
 *
 * @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());
}

//獲得本月第一天0點時間
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());
}

/**
 * 根據包名獲取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;
}

調用過程

//以上的方法封裝在了NetworkStatsHelper類里
public class NetworkStatsHelper {
    NetworkStatsManager networkStatsManager;
    int packageUid;

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

//初始化這個工具類
NetworkStatsManager networkStatsManager = (NetworkStatsManager) getSystemService(NETWORK_STATS_SERVICE);
helper = new NetworkStatsHelper(networkStatsManager);

循環遍歷應用

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);
                //...添加自己的代碼
                break;
            }
        }
    } catch (PackageManager.NameNotFoundException exception) {
        exception.printStackTrace();
    }
}

這里說明下為什么要過濾掉info.applicationInfo.uid == 1000
因為沒有獲取uid == 1000的進程的流量權限

好了現在說到權限，下面就是需要配置的權限

<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 就是忽略這個錯誤的意思，不然它會報紅
僅僅在manifest里配置權限還是不夠的，還要動態申請

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;
}

// 打開“有權查看使用情況的應用”頁面
private void requestReadNetworkStats() {
    Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
    startActivity(intent);
}

OK，到此就應該能成功獲取流量統計信息了