getRunningTask API

来源：互联网发布：伯明翰大学知乎编辑：程序博客网时间：2024/06/14 11:08

解决方法1：Is there an alternative for getRunningTask API

String getTopPackage(){    long ts = System.currentTimeMillis();    UsageStatsManager mUsageStatsManager = (UsageStatsManager)getSystemService("usagestats");    List<UsageStats> usageStats = mUsageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_BEST, ts-1000, ts);    if (usageStats == null || usageStats.size() == 0) {        return NONE_PKG;    }    Collections.sort(usageStats, mRecentComp);    return usageStats.get(0).getPackageName();}

static class RecentUseComparator implements Comparator<UsageStats> {    @Override    public int compare(UsageStats lhs, UsageStats rhs) {        return (lhs.getLastTimeUsed() > rhs.getLastTimeUsed()) ? -1 : (lhs.getLastTimeUsed() == rhs.getLastTimeUsed()) ? 0 : 1;    }}

需要的权限

<uses-permission xmlns:tools="http://schemas.android.com/tools"    android:name="android.permission.PACKAGE_USAGE_STATS"    tools:ignore="ProtectedPermissions" />

设置界面授权

Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);startActivity(intent);

检查是否申请了权限

public static boolean needPermissionForBlocking(Context context) {    try {        PackageManager packageManager = context.getPackageManager();        ApplicationInfo applicationInfo = packageManager.getApplicationInfo(context.getPackageName(), 0);        AppOpsManager appOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);        int mode = appOpsManager.checkOpNoThrow(AppOpsManager.OPSTR_GET_USAGE_STATS, applicationInfo.uid, applicationInfo.packageName);        return  (mode != AppOpsManager.MODE_ALLOWED);    } catch (PackageManager.NameNotFoundException e) {        return true;    }}

解决方法2：getRunningTasks doesn’t work in Android L

Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);startActivity(intent);    public void getTopActivtyFromLolipopOnwards(){    String topPackageName ;    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {        UsageStatsManager mUsageStatsManager = (UsageStatsManager)getSystemService(Context.USAGE_STATS_SERVICE);        long time = System.currentTimeMillis();        // We get usage stats for the last 10 seconds        List<UsageStats> stats = mUsageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_DAILY, time - 1000*10, time);        // Sort the stats by the last time used        if(stats != null) {            SortedMap<Long,UsageStats> mySortedMap = new TreeMap<Long,UsageStats>();            for (UsageStats usageStats : stats) {                mySortedMap.put(usageStats.getLastTimeUsed(),usageStats);            }            if(mySortedMap != null && !mySortedMap.isEmpty()) {                topPackageName =  mySortedMap.get(mySortedMap.lastKey()).getPackageName();                Log.e("TopPackage Name",topPackageName);            }        }    }}

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