进程相关→ProcessUtils

	import android.app.ActivityManager;
	import android.app.AppOpsManager;
	import android.app.usage.UsageStats;
	import android.app.usage.UsageStatsManager;
	import android.content.Context;
	import android.content.Intent;
	import android.content.pm.ApplicationInfo;
	import android.content.pm.PackageManager;
	import android.content.pm.ResolveInfo;
	import android.provider.Settings;
	import android.support.annotation.NonNull;
	import java.util.Arrays;
	import java.util.Collections;
	import java.util.HashSet;
	import java.util.List;
	import java.util.Set;
	/**
	* <pre>
	* author: Blankj
	* blog : http://blankj.com
	* time : 2016/10/18
	* desc : 进程相关工具类
	* </pre>
	*/
	public final class ProcessUtils {
	private ProcessUtils() {
	throw new UnsupportedOperationException("u can't instantiate me...");
	}
	/**
	* 获取前台线程包名
	* <p>当不是查看当前App，且SDK大于21时，
	* 需添加权限 {@code <uses-permission android:name="android.permission.PACKAGE_USAGE_STATS"/>}</p>
	*
	* @return 前台应用包名
	*/
	public static String getForegroundProcessName() {
	ActivityManager manager = (ActivityManager) Utils.getContext().getSystemService(Context.ACTIVITY_SERVICE);
	List<ActivityManager.RunningAppProcessInfo> infos = manager.getRunningAppProcesses();
	if (infos != null && infos.size() != 0) {
	for (ActivityManager.RunningAppProcessInfo info : infos) {
	if (info.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
	return info.processName;
	}
	}
	}
	if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.LOLLIPOP) {
	PackageManager packageManager = Utils.getContext().getPackageManager();
	Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
	List<ResolveInfo> list = packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
	System.out.println(list);
	if (list.size() > 0) {// 有"有权查看使用权限的应用"选项
	try {
	ApplicationInfo info = packageManager.getApplicationInfo(Utils.getContext().getPackageName(), 0);
	AppOpsManager aom = (AppOpsManager) Utils.getContext().getSystemService(Context.APP_OPS_SERVICE);
	if (aom.checkOpNoThrow(AppOpsManager.OPSTR_GET_USAGE_STATS, info.uid, info.packageName) != AppOpsManager.MODE_ALLOWED) {
	Utils.getContext().startActivity(intent);
	}
	if (aom.checkOpNoThrow(AppOpsManager.OPSTR_GET_USAGE_STATS, info.uid, info.packageName) != AppOpsManager.MODE_ALLOWED) {
	LogUtils.d("getForegroundApp", "没有打开\"有权查看使用权限的应用\"选项");
	return null;
	}
	UsageStatsManager usageStatsManager = (UsageStatsManager) Utils.getContext().getSystemService(Context.USAGE_STATS_SERVICE);
	long endTime = System.currentTimeMillis();
	long beginTime = endTime - 86400000 * 7;
	List<UsageStats> usageStatses = usageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_BEST, beginTime, endTime);
	if (usageStatses == null || usageStatses.isEmpty()) return null;
	UsageStats recentStats = null;
	for (UsageStats usageStats : usageStatses) {
	if (recentStats == null || usageStats.getLastTimeUsed() > recentStats.getLastTimeUsed()) {
	recentStats = usageStats;
	}
	}
	return recentStats == null ? null : recentStats.getPackageName();
	} catch (PackageManager.NameNotFoundException e) {
	e.printStackTrace();
	}
	} else {
	LogUtils.d("getForegroundApp", "无\"有权查看使用权限的应用\"选项");
	}
	}
	return null;
	}
	/**
	* 获取后台服务进程
	* <p>需添加权限 {@code <uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES"/>}</p>
	*
	* @return 后台服务进程
	*/
	public static Set<String> getAllBackgroundProcesses() {
	ActivityManager am = (ActivityManager) Utils.getContext().getSystemService(Context.ACTIVITY_SERVICE);
	List<ActivityManager.RunningAppProcessInfo> infos = am.getRunningAppProcesses();
	Set<String> set = new HashSet<>();
	for (ActivityManager.RunningAppProcessInfo info : infos) {
	Collections.addAll(set, info.pkgList);
	}
	return set;
	}
	/**
	* 杀死所有的后台服务进程
	* <p>需添加权限 {@code <uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES"/>}</p>
	*
	* @return 被暂时杀死的服务集合
	*/
	public static Set<String> killAllBackgroundProcesses() {
	ActivityManager am = (ActivityManager) Utils.getContext().getSystemService(Context.ACTIVITY_SERVICE);
	List<ActivityManager.RunningAppProcessInfo> infos = am.getRunningAppProcesses();
	Set<String> set = new HashSet<>();
	for (ActivityManager.RunningAppProcessInfo info : infos) {
	for (String pkg : info.pkgList) {
	am.killBackgroundProcesses(pkg);
	set.add(pkg);
	}
	}
	infos = am.getRunningAppProcesses();
	for (ActivityManager.RunningAppProcessInfo info : infos) {
	for (String pkg : info.pkgList) {
	set.remove(pkg);
	}
	}
	return set;
	}
	/**
	* 杀死后台服务进程
	* <p>需添加权限 {@code <uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES"/>}</p>
	*
	* @param packageName 包名
	* @return {@code true}: 杀死成功<br>{@code false}: 杀死失败
	*/
	public static boolean killBackgroundProcesses(@NonNull String packageName) {
	ActivityManager am = (ActivityManager) Utils.getContext().getSystemService(Context.ACTIVITY_SERVICE);
	List<ActivityManager.RunningAppProcessInfo> infos = am.getRunningAppProcesses();
	if (infos == null || infos.size() == 0) return true;
	for (ActivityManager.RunningAppProcessInfo info : infos) {
	if (Arrays.asList(info.pkgList).contains(packageName)) {
	am.killBackgroundProcesses(packageName);
	}
	}
	infos = am.getRunningAppProcesses();
	if (infos == null || infos.size() == 0) return true;
	for (ActivityManager.RunningAppProcessInfo info : infos) {
	if (Arrays.asList(info.pkgList).contains(packageName)) {
	return false;
	}
	}
	return true;
	}
	}