getRunningAppProcesses

package com.itheima62.mobileguard.utils;import android.content.Context;import android.content.pm.ApplicationInfo;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.os.Build;import android.os.Parcel;import android.os.Parcelable;import java.util.ArrayList;import java.util.List;import eu.chainfire.libsuperuser.Shell;/** * @author Jared Rummler */public class ProcessManager {    private static final String TAG = "ProcessManager";    private static final String APP_ID_PATTERN;    static {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {            // Android 4.2 (JB-MR1) changed the UID name of apps for multiple user account support.            APP_ID_PATTERN = "u\\d+_a\\d+";        } else {            APP_ID_PATTERN = "app_\\d+";        }    }    public static List<Process> getRunningProcesses() {        List<Process> processes = new ArrayList<>();        List<String> stdout = Shell.SH.run("toolbox ps -p -P -x -c");        for (String line : stdout) {            try {                processes.add(new Process(line));            } catch (Exception e) {                android.util.Log.d(TAG, "Failed parsing line " + line);            }        }        return processes;    }    public static List<Process> getRunningApps() {        List<Process> processes = new ArrayList<>();        List<String> stdout = Shell.SH.run("toolbox ps -p -P -x -c");        int myPid = android.os.Process.myPid();        for (String line : stdout) {            try {                Process process = new Process(line);                if (process.user.matches(APP_ID_PATTERN)) {                    if (process.ppid == myPid || process.name.equals("toolbox")) {                        // skip the processes we created to get the running apps.                        continue;                    }                    processes.add(process);                }            } catch (Exception e) {                android.util.Log.d(TAG, "Failed parsing line " + line);            }        }        return processes;    }    public static class Process implements Parcelable {        /** User name */        public final String user;        /** User ID */        public final int uid;        /** Processes ID */        public final int pid;        /** Parent processes ID */        public final int ppid;        /** virtual memory size of the process in KiB (1024-byte units). */        public final long vsize;        /** resident set size, the non-swapped physical memory that a task has used (in kiloBytes). */        public final long rss;        public final int cpu;        /** The priority */        public final int priority;        /** The priority, <a href="https://en.wikipedia.org/wiki/Nice_(Unix)">niceness</a> level */        public final int niceness;        /** Real time priority */        public final int realTimePriority;        /** 0 (sched_other), 1 (sched_fifo), and 2 (sched_rr). */        public final int schedulingPolicy;        /** The scheduling policy. Either "bg", "fg", "un", "er", or "" */        public final String policy;        /** address of the kernel function where the process is sleeping */        public final String wchan;        public final String pc;        /**         * Possible states:         * <p/>         * "D" uninterruptible sleep (usually IO)         * <p/>         * "R" running or runnable (on run queue)         * <p/>         * "S" interruptible sleep (waiting for an event to complete)         * <p/>         * "T" stopped, either by a job control signal or because it is being traced         * <p/>         * "W" paging (not valid since the 2.6.xx kernel)         * <p/>         * "X" dead (should never be seen)         * </p>         * "Z" defunct ("zombie") process, terminated but not reaped by its parent         */        public final String state;        /** The process name */        public final String name;        /** user time in milliseconds */        public final long userTime;        /** system time in milliseconds */        public final long systemTime;        // Much dirty. Much ugly.        private Process(String line) throws Exception {            String[] fields = line.split("\\s+");            user = fields[0];            uid = android.os.Process.getUidForName(user);            pid = Integer.parseInt(fields[1]);            ppid = Integer.parseInt(fields[2]);            vsize = Integer.parseInt(fields[3]) * 1024;            rss = Integer.parseInt(fields[4]) * 1024;            cpu = Integer.parseInt(fields[5]);            priority = Integer.parseInt(fields[6]);            niceness = Integer.parseInt(fields[7]);            realTimePriority = Integer.parseInt(fields[8]);            schedulingPolicy = Integer.parseInt(fields[9]);            if (fields.length == 16) {                policy = "";                wchan = fields[10];                pc = fields[11];                state = fields[12];                name = fields[13];                userTime = Integer.parseInt(fields[14].split(":")[1].replace(",", "")) * 1000;                systemTime = Integer.parseInt(fields[15].split(":")[1].replace(")", "")) * 1000;            } else {                policy = fields[10];                wchan = fields[11];                pc = fields[12];                state = fields[13];                name = fields[14];                userTime = Integer.parseInt(fields[15].split(":")[1].replace(",", "")) * 1000;                systemTime = Integer.parseInt(fields[16].split(":")[1].replace(")", "")) * 1000;            }        }        private Process(Parcel in) {            user = in.readString();            uid = in.readInt();            pid = in.readInt();            ppid = in.readInt();            vsize = in.readLong();            rss = in.readLong();            cpu = in.readInt();            priority = in.readInt();            niceness = in.readInt();            realTimePriority = in.readInt();            schedulingPolicy = in.readInt();            policy = in.readString();            wchan = in.readString();            pc = in.readString();            state = in.readString();            name = in.readString();            userTime = in.readLong();            systemTime = in.readLong();        }        public String getPackageName() {            if (!user.matches(APP_ID_PATTERN)) {                // this process is not an application                return null;            } else if (name.contains(":")) {                // background service running in another process than the main app process                return name.split(":")[0];            }            return name;        }        public PackageInfo getPackageInfo(Context context, int flags)                throws PackageManager.NameNotFoundException        {            String packageName = getPackageName();            if (packageName == null) {                throw new PackageManager.NameNotFoundException(name + " is not an application process");            }            return context.getPackageManager().getPackageInfo(packageName, flags);        }        public ApplicationInfo getApplicationInfo(Context context, int flags)                throws PackageManager.NameNotFoundException        {            String packageName = getPackageName();            if (packageName == null) {                throw new PackageManager.NameNotFoundException(name + " is not an application process");            }            return context.getPackageManager().getApplicationInfo(packageName, flags);        }        @Override        public int describeContents() {            return 0;        }        @Override        public void writeToParcel(Parcel dest, int flags) {            dest.writeString(user);            dest.writeInt(uid);            dest.writeInt(pid);            dest.writeInt(ppid);            dest.writeLong(vsize);            dest.writeLong(rss);            dest.writeInt(cpu);            dest.writeInt(priority);            dest.writeInt(niceness);            dest.writeInt(realTimePriority);            dest.writeInt(schedulingPolicy);            dest.writeString(policy);            dest.writeString(wchan);            dest.writeString(pc);            dest.writeString(state);            dest.writeString(name);            dest.writeLong(userTime);            dest.writeLong(systemTime);        }        public static final Creator<Process> CREATOR = new Creator<Process>() {            public Process createFromParcel(Parcel source) {                return new Process(source);            }            public Process[] newArray(int size) {                return new Process[size];            }        };    }}

Example/Test:

new AsyncTask<Void, Void, List<ProcessManager.Process>>() {    long startTime;    @Override    protected List<ProcessManager.Process> doInBackground(Void... params) {        startTime = System.currentTimeMillis();        return ProcessManager.getRunningApps();    }    @Override    protected void onPostExecute(List<ProcessManager.Process> processes) {        StringBuilder sb = new StringBuilder();        sb.append("Execution time: ").append(System.currentTimeMillis() - startTime).append("ms\n");        sb.append("Running apps:\n");        for (ProcessManager.Process process : processes) {            sb.append('\n').append(process.name);        }        new AlertDialog.Builder(MainActivity.this).setMessage(sb.toString()).show();    }}.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);

Help finding a workaround (hack) to get the foreground app on Android 5.1.1+

/** first app user */public static final int AID_APP = 10000;/** offset for uid ranges for each user */public static final int AID_USER = 100000;public static String getForegroundApp() {  File[] files = new File("/proc").listFiles();  int lowestOomScore = Integer.MAX_VALUE;  String foregroundProcess = null;  for (File file : files) {    if (!file.isDirectory()) {      continue;    }    int pid;    try {      pid = Integer.parseInt(file.getName());    } catch (NumberFormatException e) {      continue;    }    try {      String cgroup = read(String.format("/proc/%d/cgroup", pid));      String[] lines = cgroup.split("\n");      if (lines.length != 2) {        continue;      }      String cpuSubsystem = lines[0];      String cpuaccctSubsystem = lines[1];      if (!cpuaccctSubsystem.endsWith(Integer.toString(pid))) {        // not an application process        continue;      }      if (cpuSubsystem.endsWith("bg_non_interactive")) {        // background policy        continue;      }      String cmdline = read(String.format("/proc/%d/cmdline", pid));      if (cmdline.contains("com.android.systemui")) {        continue;      }      int uid = Integer.parseInt(          cpuaccctSubsystem.split(":")[2].split("/")[1].replace("uid_", ""));      if (uid >= 1000 && uid <= 1038) {        // system process        continue;      }      int appId = uid - AID_APP;      int userId = 0;      // loop until we get the correct user id.      // 100000 is the offset for each user.      while (appId > AID_USER) {        appId -= AID_USER;        userId++;      }      if (appId < 0) {        continue;      }      // u{user_id}_a{app_id} is used on API 17+ for multiple user account support.      // String uidName = String.format("u%d_a%d", userId, appId);      File oomScoreAdj = new File(String.format("/proc/%d/oom_score_adj", pid));      if (oomScoreAdj.canRead()) {        int oomAdj = Integer.parseInt(read(oomScoreAdj.getAbsolutePath()));        if (oomAdj != 0) {          continue;        }      }      int oomscore = Integer.parseInt(read(String.format("/proc/%d/oom_score", pid)));      if (oomscore < lowestOomScore) {        lowestOomScore = oomscore;        foregroundProcess = cmdline;      }    } catch (IOException e) {      e.printStackTrace();    }  }  return foregroundProcess;}private static String read(String path) throws IOException {  StringBuilder output = new StringBuilder();  BufferedReader reader = new BufferedReader(new FileReader(path));  output.append(reader.readLine());  for (String line = reader.readLine(); line != null; line = reader.readLine()) {    output.append('\n').append(line);  }  reader.close();  return output.toString();}

解决方法二：UsageStatsManager

private String printForegroundTask() {    String currentApp = "NULL";    if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {        UsageStatsManager usm = (UsageStatsManager)this.getSystemService("usagestats");        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("adapter", "Current App in foreground is: " + currentApp);    return currentApp;}

需要权限：android:get_usage_stats

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;    }}

但是有很多进程都没有名字，如果你想让用户直观的管理进程的话可能需要下面这个循环过滤没有名字的线程

List<ProcessManager.Process> Processes=new ArrayList<>(); PackageManager pm = getPackageManager(); runningProcesses = ProcessManager.getRunningProcesses(); for (ProcessManager.Process runningProcesse : runningProcesses) {      String packname = runningProcesse.getPackageName();            try {                ApplicationInfo applicationInfo = pm.getApplicationInfo(packname, 0);            } catch (PackageManager.NameNotFoundException e) {                e.printStackTrace();                continue;            }            Processes.add(runningProcesse);        }

Library

• AndroidProcesses

• libsuperuser

参考

• Android 5.1.1 and above - getRunningAppProcesses() returns my application package only