Thursday, 12 November 2015

android lollipop get foreground app



First, you need this permission in your AndroidManifest.xml

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

your IDE may give you error: (but you still can compile and generate apk)


To fix this , you need:


you need add this:

xmlns:tools="http://schemas.android.com/tools"






think the documentation was just short hand for the Calendar stuff. I don't think it actually works with just 2014; however I can be wrong.
In order to access the actually list of UsageStats, you would need to create a Calendar object with the correct month,day, and year. Exactly how MRK said in the other answer. I copied and corrected the errors in MRK's code so anyone who sees it in the future can see it.
Calendar beginCal = Calendar.getInstance();
beginCal.set(Calendar.DATE, 1);
beginCal.set(Calendar.MONTH, 0);
beginCal.set(Calendar.YEAR, 2012);

Calendar endCal = Calendar.getInstance();
endCal.set(Calendar.DATE, 1);
endCal.set(Calendar.MONTH, 0);
endCal.set(Calendar.YEAR, 2014);

final List<UsageStats> queryUsageStats=usageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_YEARLY, beginCal.getTimeInMillis(), endCal.getTimeInMillis());
-Credit MRK; corrected by me (he accidentally just put cal instead of beginCal and endCal)
The code for the usage access settings is below. :)
Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
startActivity(intent);
http://stackoverflow.com/questions/26431795/how-to-use-usagestatsmanager



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From lollipop onwards this got changed. Please find below code, before that user has to go Settings -> Security -> (Scroll down to last) Apps with usage access -> Give the permissions to our app
private void printForegroundTask() {
    String currentApp = "NULL";
    if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
        UsageStatsManager usm = (UsageStatsManager) this.getSystemService(Context.USAGE_STATS_SERVICE);
        long time = System.currentTimeMillis();
        List<UsageStats> appList = usm.queryUsageStats(UsageStatsManager.INTERVAL_DAILY,  time - 1000*1000, time);
        if (appList != null && appList.size() > 0) {
            SortedMap<Long, UsageStats> mySortedMap = new TreeMap<Long, UsageStats>();
            for (UsageStats usageStats : appList) {
                mySortedMap.put(usageStats.getLastTimeUsed(), usageStats);
            }
            if (mySortedMap != null && !mySortedMap.isEmpty()) {
                currentApp = mySortedMap.get(mySortedMap.lastKey()).getPackageName();
            }
        }
    } else {
        ActivityManager am = (ActivityManager)this.getSystemService(Context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningAppProcessInfo> tasks = am.getRunningAppProcesses();
        currentApp = tasks.get(0).processName;
    }

    Log.e(TAG, "Current App in foreground is: " + currentApp);
}

https://stackoverflow.com/questions/2166961/determining-the-current-foreground-application-from-a-background-task-or-service


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